Inorganic chemistry (C01)

C   Chemistry; metallurgy(315635)
C01            Inorganic chemistry(20787)
Catalyst for selective oxidation of hydrogen sulfur (versions) // 2629193
FIELD: chemistry.SUBSTANCE: catalyst further comprises silicates and/or aluminosilicates in an amount of 1.0-40.0 wt %, the catalyst contains phosphorus and/or boron compounds as the oxygen-containing non-metal compounds and has the following composition, expressed as oxide, wt %: Fe2O3 - 36.0-85.0, P2O5/B2O5 - 4.0-25.0, silicates and/or aluminosilicates - 1.0-40.0. The second catalyst version further comprises at least one compound of a metal selected from the group: cobalt, manganese, zinc, chromium, copper, nickel, titanium, molybdenum, tungsten, vanadium in an amount of 0.1-30.0 wt %.EFFECT: obtaining a catalyst which is characterized by an optimized texture, reduced bulk density, increased pore volume, and provides a high sulfur yield over a wide range of temperatures in multicomponent gas mixtures.24 cl, 5 tbl, 6 ex
Electrochemical method to produce molybdene boride // 2629188
FIELD: metallurgy.SUBSTANCE: sodium fluoride is additionally added, and also in order to increase the purity and decrease the temperature, the electrolysis is carried out at the following component ratio, wt %: potassium chloride 15.60, sodium fluoride 7.84, sodium molybdate 1.00, boron oxide 1.00 up to 3.0, sodium chloride is the rest, at the temperature of 750°C and the voltage in the bath U=2.8 V.EFFECT: use of the proposed method makes possible to increase the purity of the product, in particular to reduce the contamination of the target product with the other metals, and to reduce the process temperature.3 ex
ethod for obtaining silver chloride particles // 2629080
FIELD: chemistry.SUBSTANCE: method for silver chloride particles obtaining involves an exchange reaction between salts, one of which is silver-containing, and the second is chlorine-containing. Mechanochemical activation of the reaction mixture is carried out. The reaction mixture is diluted with a water-soluble non-target reaction product.EFFECT: invention allows to simplify separation of silver chloride particles, reduce the degree of their aggregation, and shorten synthesis duration.1 tbl, 4 ex

ethod for producing calcium pyrophosphate powder // 2629079
FIELD: chemistry.SUBSTANCE: method for producing a calcium pyrophosphate powder comprising the preparation and reaction of aqueous solutions containing calcium ions, pyrophosphate ions and ammonium ions, the precipitation of the precipitate in the mother liquor for 30-60 minutes, filtration, drying, disaggregation, heat treatment in the range of 300-600°C for 2-4 hours. After preparing a solution containing pyrophosphate ions, it is mixed with an ion exchange resin in H+-form at a ratio of "ion exchange resin/salt mass" in the range of 3-5 for 30-60 minutes, the concentration of the solution containing pyrophosphate ions being 0.1 M - 0.5 M. Then, the resin is separated by filtration, an equal volume of calcium salt solution is added to the resulting solution, taken in an amount providing a ratio of Ca/P=1, and the pH of the produced solution is changed to precipitation.EFFECT: producing powder with particles with a shape close to equiaxed, 100-200 nm in size, providing powder activity in various processes.4 cl, 7 dwg, 1 tbl, 5 ex

ethod and device for the degassing of liquid sulfur // 2629077
FIELD: chemistry.SUBSTANCE: way to implement in different, not completely isolated cells, each of which is filled with liquid sulfur first zone and gas filled second zone. Liquid sulfur is pumped from the first zone of each of the chambers in the second zone of this same chamber and sprayed in the area. In the first zone of the first camera insufflated with oxygen-containing gas to remove the H2S, and in the first zone chamber, located after the first chamber, insufflated with inert gas to remove SO2. The device contains a container (1), split by partition (4) into two not completely isolated one from another chambers (a, b) filled with liquid sulfur first zone (2) and gas filled second zone (3). The first blowing device (12) is located in the first zone (2) of chamber (b) for oxygen-containing gas injection into liquid sulfur, the second blowing device (31)-in the first zone (2) of chamber (c) after the camera (b) for injection of inert gas into a liquid sulfur. Incoming into the second zone (3) of chamber (b) of the first device (25') for spraying liquid sulfur connected with pump (21'), suction liquid sulfur from the first zone (2) of chamber (b). Incoming into the second zone (3) of chamber (c) second device (25") for spraying liquid sulfur connected with pump (21"), suction liquid sulfur from the first zone (2) of chamber (c).EFFECT: effective removal of gases contained in the liquid sulphur, low level of SO2 formation.7 cl, 4 dwg

Holmium-manganese sulfide with giant magnetoresistance // 2629058
FIELD: physics.SUBSTANCE: holmium-manganese sulfide with giant magnetoresistance includes manganese and sulfur and further contains holmium at the following ratio of components, wt %: holmium 2.5-15, manganese 47.5-35, sulfur 50.EFFECT: invention allows to obtain a magnetic compound with a cubic lattice of NaCl type, which has a stable and repetitive effect of giant magnetoresistance in a wide range of temperatures and magnetic fields.4 dwg, 2 tbl

ethod of producing ammonium nitrate granules by spraying its melt // 2629055
FIELD: chemistry.SUBSTANCE: in the method of producing ammonium nitrate granules by spraying its melt in a granulation tower, a closed circulation path of the cooling air upward flow contaminated with pulverized particles of ammonium nitrate is used. The flow leaving the tower heated is cooled in the air cooler without reducing the mass concentration of the pulverized particles of ammonium nitrate therein. The autonomous vapour-air stream coming from the pre-vapour device is first cooled in a cooler-dehumidifier and at the same time the mass concentration of the water vapour contained therein is reduced by condensing it, and then it is mixed with the ascending stream. From the resulting mixed stream, the measuring part is separated to compensate for the replenishment of the closed circulation circuit. The part of the stream remaining after separation is introduced into the lower zone of the tower cavity, where it is mixed with the sucked up atmospheric air. The measuring part of the cooling air, separated from the stream, is sent to the scrubber to trap the dust-like particles of ammonium nitrate and subsequent release into the atmosphere.EFFECT: ensuring reduced environmental hazard.1 dwg,1 tbl, 1 ex
ethod for lungs protection against ischemic and reperfusion damage during cardiac surgical interventions with artificial circulation // 2628643
FIELD: medicine.SUBSTANCE: artificial ventilation is performed throughout the entire period of artificial circulation with a respiratory volume of 4 ml/kg, respiration rate of 6 in 1 min, PEEP 5 cm H2O, FiO2 0.3-0.4. At that, nitrogen oxide - NO is fed into the extracorporeal circulation circuit at a dose of 40 ppm immediately after the cardiopulmonary bypass is connected and the estimated volumetric rate of perfusion and perfusion balance is achieved throughout the entire period of artificial circulation. Before patient disconnection from mechanical perfusion and transferring to natural circulation, the settings of artificial ventilation are returned to the original pre-perfusion parameters, NO supply to the extracorporeal circulation circuit is stopped.EFFECT: method allows to reduce the number of respiratory complications in the postoperative period in patients operated under IC conditions, to reduce the financial costs of treatment and to improve the results of cardiosurgical interventions.1 ex
ethod of crystalline diamond particles obtaining // 2628617
FIELD: nanotechnology.SUBSTANCE: method of crystalline diamond particles obtaining includes adding of cycloalkane (cyclic saturated hydrocarbon) or polybasic alcohol in an amount of 5-85 wt % the weight of detonation nanodiamonds to the nanodiamonds powder obtained by detonation synthesis, aging of the resulting composition at a static pressure of 5-8 GPa and a temperature of 1000-1800°C for 5-120 seconds and separating the resulting particles from graphite by sedimentation in the liquid.EFFECT: invention allows to directly obtain crystalline diamond particles of the size needed for finishing and biomarkers in the range of 50-500 nm, thereby eliminating the need for additional grinding.4 cl, 1 dwg, 25 ex

ethod of manufacturing carbon material and carbon material // 2628606
FIELD: chemistry.SUBSTANCE: firstly ashless coal is oxidized, for example, with air, at a temperature of 150°C to a temperature not exceeding the ignition temperature of ash-free coal. The oxygen content of the oxidized ash is increased from 2.0 to 10.0%. Oxidized ash is mixed with unoxidized ash-free coal in a ratio of 60-95 parts by weight of oxidized ash-free coal per 100 parts by weight of the mixture. The resulting mixture is formed and carbonized.EFFECT: carbon material has a high purity and density, is not deformed and does not contain cracks.4 cl, 2 dwg, 1 tbl
Preparing catalysts based on borzeolites // 2628080
FIELD: chemistry.SUBSTANCE: method is proposed for preparing catalysts based on boron-containing silicates of a zeolite structure having a boron content of less than 1 wt %, comprising preparing an aqueous slurry containing, at least, one boron-containing silicate with a MFI type zeolite structure having a SiO2/B2O3 from 2 to 4 and an aluminium content of less than 1 wt %; additing acid to establish a pH of 1-5; stirring the slurry; isolating the resulting solid, its optional washing and calcinating at a temperature not higher than 350°C. A catalyst is proposed, prepared by the inventive process.EFFECT: proposed catalysts provide a high level of selectivity to isobutene during the cleavage of methyl-tertio-butyl ether and provide a reduced formation of by-products.15 cl, 2 ex
ethod of preparing microcrystalline nay zeolite // 2627900
FIELD: chemistry.SUBSTANCE: method of preparing the microcrystalline NaY zeolite comprises precipitating an aluminosilicate gel from solutions of sodium silicate, aluminium sulfate and sodium aluminate, introducing an amorphous aluminosilicate seed, crystallizing the precipitated gel at a temperature of 92-95°C and cooling the resulting zeolite slurry. The suspension of zeolite is cooled to a temperature of not more than 60°C by discharging cold water into a suspension with a speed of, at least, 20°S/h. The composition of the aluminosilicate gel to be crystallized has a molar ratio (Na2-Al2O3)/SiO2 in the range of 0.37-0.39, which provides the necessary excess alkalinity.EFFECT: preparing a pure zeolite while reducing the duration of its preparation.1 tbl, 5 ex
ethod of quantitative determination of aluminium, vanadium, tungsten, iron, cadmium, cobalt, magnesium, manganese, copper, nickel, lead, strontium, titanium, chrome, zinc in atmospheric air by mass spectrometry with inductively coupled plasma // 2627854
FIELD: chemistry.SUBSTANCE: sample is taken while drawing through an atmospheric air filter. The filter is then decomposed by the sample preparation method in a muffle furnace. A solution of the internal standard is added to the filter, placed in the muffle furnace and held in series at a temperature of 100°C for 40-60 minutes, at a temperature of 250°C for 40-60 minutes and then the ashing is carried out at a temperature of 450-500°C. The ash is wetted with concentrated nitric acid, heated on a sand bath and evaporated to a wet salt state. After cooling, they are dissolved in 5 cm3 of 1% aqueous solution of nitric acid, transferred to a volumetric tube and the resulting volume is adjusted to 10 cm3 by 1% aqueous solution of nitric acid. The sample is placed in the tube of a sampling device of a mass spectrometer with an inductively coupled argon plasma and measurement is carried out using a reaction-collision cell with helium passing through it as a reactant gas, and the concentration of a particular metal is determined using a calibration chart, taking into account the adjustment of the air volume sampled for analysis to normal conditions. In this case, the sample is taken by drawing the test air in a volume of 6-20 m3. Before adding the inner standard solution to the filter, 0.1 cm3 of ethyl alcohol and 0.5 cm3 of 20% solution of ammonium sulfate or potassium disulfate in deionized water are successively injected into a quartz cup. 0.1 cm3 of the internal standard solution injected afterwards contains a mass concentration of the reference element - indium - in an amount of 100 mcg/dm3. Moreover, the ashing in the muffle furnace at a temperature of 450-500°C is carried for 3.0-3.5 hours, and the ashes formed by ashing are wetted with 0.3-0.5 cm3 of concentrated nitric acid with density of 1.415 g/cm3. Measurements in the prepared sample of specific metal content in a mass spectrometer are carried out by passing helium through a reaction-collision cell at a rate of 5.2-5.5 cm3/min. It is possible to determine 15 chemical elements - metals - in atmospheric air from a single sample in a wide range of concentrations at a level from 0.000001 to 5 mg/m3.EFFECT: expanded ability to determine elements.5 cl, 9 tbl
edical adsorbent and method for its obtaining // 2627464
FIELD: medicine.SUBSTANCE: medical adsorbent contains activated carbon in the form of spherical pellets, obtained by carbonizing and activation of regenerated cellulose in a spherical shape, and having average pore diameter of 1.5 to 2.2 nm, specific BET surface area of 700 to 3000 m2/g, average particle size of 115 to 1002 mcm, oxide content of 0.05 meq/g or more on the surface, and packing density of 0.4 to 0.8 g/ml. Method for adsorbent production comprises the steps of: spherical viscose conversion into regenerated spherical cellulose in an acid precipitation bath, and carbonizing of the resulting regenerated spherical cellulose at a temperature of 300°C to 700°C under a nitrogen atmosphere, and then steam activation at a temperature of 750°C to 1000°C, acid cleaning and heat treatment at a temperature of 500°C to 800°C. It can be used as a therapeutic or prophylactic agent for kidney disease or liver disease for oral administration.EFFECT: adsorbent has low dosage and excellent adsorption capacity and selective adsorption of toxins, it can shorten the activation time, it is economical and environmentally friendly.6 cl, 6 ex, 3 tbl
ethod for producing calcium fluoride from fluorocarbon-containing waste of aluminium production // 2627431
FIELD: chemistry.SUBSTANCE: method for producing calcium fluoride from fluorocarbon-containing wastes of aluminium production involves treatment of fluor-containing solutions with calcium hydroxide, followed by separation of the solution and a pulp and liberation of calcium fluoride, which is washed with water. As a fluor-containing solution, a solution is used, obtained by leaching solid fine-dispersed fluorocarbon-containing waste of electrolytical aluminium production - sludge from gas cleaning, dust from electrostatic precipitators and spent coal lining. Fluorocarbon-containing wastes are submitted for treatment in a ratio of T:H=:(10-11) with respect to a 2-2.5% solution of sodium hydroxide. The treatment is carried out at a leach solution temperature of 65-85°C.EFFECT: invention makes it possible to produce calcium fluoride from solid fine-dispersed fluorocarbon-containing waste of electrolytic aluminium production with a fluor content in the solid phase of 12 to 25 percent.2 cl, 4 tbl
ethod of producing silicon carbide // 2627428
FIELD: chemistry.SUBSTANCE: method includes dosing of silica-containing materials and carbonaceous reductants, loading them into an electric resistance furnace and conducting smelting reduction. First, around the core, a charge layer is loaded, containing quartzite with a fraction of 6-10 mm, then the following layer is loaded with a charge containing quartz sand and/or quartzite with a fraction of 0.3-6.0 mm, after which a charge layer containing quartz sand with a fraction less than that of the furnace is loaded into the upper part of the furnace and to the periphery 0.3 mm, and finely divided silica fraction 0.22 mm, with the following ratio of components of silica-containing raw materials, wt %: quartzite with a fraction of 6.0-10 mm - 20-30, quartz sand (quartzite) with a fraction of 0.3-6.0 mm - 50-70, quartz sand fraction less 0.3 mm - 5-8, finely divided silica fraction 0.22 mm - 5-15. Quartz sand fraction in amount of less than 0.3 mm and fine-grained silica before loading of the charge can be premixed with quartz sand with a fraction of 0.3-6 mm.EFFECT: increasing the productivity of the process when using cheap silica-containing materials.2 cl, 9 ex
ethod for inactivation of impurity in lithium fluoride sorbent // 2627427
FIELD: chemistry.SUBSTANCE: for inactivation of alkali and/or alkaline earth metals fluorides impurities in lithium fluoride sorbent, the sorbent is treated with silicon tetrafluoride obtained by thermal decomposition of lithium hexafluorosilicate at a temperature of 175-185°C.EFFECT: impurities of alkali or alkaline-earth metals form silicofluorides inert to uranium hexafluoride, excluding the formation of a radioactive compound in the lithium fluoride mass.2 cl, 1 ex

Solid phosphate salt and method of its production // 2627403
FIELD: chemistry.SUBSTANCE: salt is a mixture of fluorapatite of the formula Ca5(PO4)3F and dicalcium phosphate of the formula CaHPO4×nH2O, where n is 0 to 2, which contains fluorapatite in an amount of 27 to 99.0 wt % and phosphorus in terms of P2O5 in the above salt 35 to 45 wt %.EFFECT: increasing salt extraction excluding the use of large amounts of water, increasing the efficiency of the decomposition stage.6 cl, 1 dwg, 1 tbl, 2 ex

Zeolite materials of sleep type and methods of their production with the use of cycloalkylammonium compounds // 2627399
FIELD: chemistry.SUBSTANCE: method involves the following steps. Providing a mixture containing one or more sources of YO2, one or more sources X2O3, and one or more tetraalkylammonium cation containing R1R2R3R4N+ compounds as guide agents for the formation of the structure and crystallization of the resulting mixture. Y is a tetravalent element, X is a trivalent element. The initial mixture contains seed crystals and does not contain a source of phosphorus. Tetraalkylammonium cations R1R2R3R4N+ compounds are composed of one or more N,N,N-trimethylcycloalkylammonium compounds.EFFECT: economical way to produce a zeolitic material with catalytic activity.30 cl, 15 dwg, 7 ex

ethod of obtaining co, h2 and methanol from synthesis gas, in particular from the waste gas production of acetylene // 2627398
FIELD: chemistry.SUBSTANCE: invention relates to a process of the preparation of a product of methanol, product H2 and a CO product from a synthesis gas containing H2 and CO, in particular from the exhaust gas of acetylene production. The method includes separating a syngas stream into first and second partial synthesis gas streams where only the CO present in the first partial synthesis gas stream is converted to CO2 and H2 using steam, washing the first partial synthesis gas stream and a portion of the second partial synthesis gas stream, each in a separate column with an amine-containing washing agent, in particular for washing from CO2, wherein in particular the washing agent is regenerated in a common column, wherein the methanol product stream is formed from one portion of the washed converted first partial synthesis gas stream and/or another portion of the unconverted second syngas stream so that the ratio (H2-CO2)/(CO+CO2), which is required for the synthesis of methanol, is regulated in the methanol product stream, in particular in the range of 2.0 to 2.1, where the washed one part of the second unconverted partial synthesis gas stream is used to produce the CO product stream and the H2 product stream and where the other portion of the washed first partial synthesis stream is synthesized, gas is used to produce the product stream H2.EFFECT: invention provides an efficient and economical preparation of three methanol products, H2 and CO from a synthesis gas containing H2 and CO.10 cl, 1 dwg

ethod for producing europium (ii) euf2 difluoride crystals // 2627394
FIELD: chemistry.SUBSTANCE: method for producing europium (II) EuF2 difluoride crystals is carried out in two stages, at the first of which EuF3 is pre-melted and its melt is fluorinated to remove the impurity of oxygen, after cooling the melt, the fluorinated EuF3 is milled and mixed with the pre-prepared crystalline silicon powder (Si) to produce the batch of the desired composition in accordance with the equation 4EuF3+Si=4EuF2+SiF4↑. At the second stage, the produced batch is melted, homogenized and the batch melt is crystallised by directional crystallisation using a fluorine-containing atmosphere, producing single-crystal europium EuF2 difluoride boules. As a directional crystallisation method, for example, the Bridgman-Stockbarger method is used. The fluorine-containing atmosphere in the crystallisation process is created by the decomposition of ammonium hydrofluorides or alkaline-earth elements. At the first step, the silicon powder can be introduced directly into the EuF3 melt with the aid of a dispenser ensuring compliance with a predetermined relationship between EuF3 and silicon.EFFECT: increasing the yield.4 cl, 3 dwg, 1 ex
Composition for dissoluting corrosive deposits // 2627377
FIELD: chemistry.SUBSTANCE: composition is proposed, containing, wt %: hydrochloric acid 20.0-35.0, hexamethylene tetramine 3.0-8.0, surfactant 0.5-4.0, isopropyl alcohol 5.0-10.0, oleic acid - 0.5-2.0, water diluent is the rest.EFFECT: composition provides an increased rate of dissoluting corrosive deposits and has reduced consumption when used to remove rust from hard surfaces.5 cl, 14 ex

Optic composite material and method for treatment thereof // 2627371
FIELD: physics.SUBSTANCE: material comprises a suspension of lead sulfide nanoparticles in the aqueous-alcoholic solution, metal nitrate and polyvinylpyrrolidone. Also the method is disclosed for treating a material, which comprises material irradiation by the electromagnetic radiation with the wavelengths of 455-635 nm and subsequent exposure at the room temperature without irradiation during 0.1-24 hours.EFFECT: developing a composite material having high nonlinear optical and spectral fluorescent characteristics in the visible and near infrared spectral range, developing a high-performance method of processing the material, which does not require special manufacturing equipment.2 cl, 9 dwg, 2 tbl, 5 ex
ethod of producing ultra-dispersed titanium carbide powder // 2627142
FIELD: metallurgy.SUBSTANCE: metal titanium is placed in the oven, the furnace is heated up to 700÷850°C and supplied to the surface of the metallic titanium hydrocarbon component in gaseous form together with argon for 90÷180 minutes.EFFECT: obtaining a needle-shaped titanium carbide powder with a particle diameter of 50-200 nm.1 tbl, 5 dwg
ethod for producing mixed uranium and plutonium oxides // 2626854
FIELD: chemistry.SUBSTANCE: method for producing mixed uranium and plutonium oxides involves mixing uranium and plutonium solutions in an unstabilized valence state, converting the master-mixture of uranium into a tetravalent form of plutonium into a trivalent form in the produced solution by reduction of a solid phase catalyst, stabilizing the resulting valence state of uranium and plutonium with the excess reducing agent and precipitating oxalates of tetravalent uranium and trivalent plutonium in weakly acid medium by simultaneous mixing the solutions of the master-mixture and hydrazine-hydrate with a solution of oxalic acid.EFFECT: production of mixed uranium and plutonium oxides directly from the products of extraction processing of spent nuclear fuel, a high degree of homogenization of the resulting mixed oxides and the possibility of varying the sizes of the resulting grains.25 cl, 2 ex

Dual-flow system and method of production of carbon dioxide // 2626850
FIELD: chemistry.SUBSTANCE: provide the process gas (22) containing the hydrocarbon. The hydrocarbon in the combustion subsystem (12) is burned to produce electric energy (24) and a combustion product stream (26) containing carbon dioxide and water. In the first separation subsystem (16), the first amount of carbon dioxide (50) is separated from the combustion product stream (48) by physical adsorption. In the second separation subsystem (18) disposed sequentially and downstream of the first separation subsystem, a second amount of carbon dioxide (60) is separated from the combustion product stream (52) by chemical absorption.EFFECT: improving the efficiency of separating carbon dioxide from process gas.24 cl, 5 dwg
ethod for fulleren c60 purification from oxide impurities // 2626635
FIELD: chemistry.SUBSTANCE: crystalline fullerene C60 is heat treated at 160-170°C in an inert gas stream to transfer the oxide impurity C60O into the dioxide impurity C120O. The treated crystalline product is then dissolved in a weakly polar aromatic solvent, for example, ortho-xylene. To convert C120O to the precipitated phase, a strongly polar solvent is added, the molecule of which does not contain double bonds, and a nitrogen atom, for example isopropyl alcohol. The volume ratio of ortho-xylene:isopropyl alcohol is 1:(0.35-0.75), respectively. After this, C120O is separated by filtration, and the desired product - fullerene C60, remaining in the solvent mixture solution, is isolated by evaporation.EFFECT: method is simplified, irreversible losses of expensive C60 are reduced.2 cl, 6 tbl
ethod for production of silicon-containing biomimetic calcium-phosphate coating on titanium alloys from human interstitial fluid model solutions // 2626604
FIELD: pharmacology.SUBSTANCE: method for production of a biomimetic silicon-containing calcium-phosphate coating on titanium alloys from a human intercellular fluid model solution is described, in which a solution of the following composition is preliminarily prepared: CaCl2 - 3.7424 g, MgCl2 - 0.6092 g, K2HPO4 - 2.8716 g, NaHCO3 - 4.5360 g, Na2SO4 - 0.0144 g, NaCl- 8.8784 g, Na2SiO3 - 0.0488÷0.2444 g, the resulting solution is precipitated at: temperature T1=20÷25°C, pH value of 7.40±0.05 for 48 hours, then the precipitate is washed, filtered, dried at temperature T2=80÷85°C for 5 hours, an aqueous suspension is prepared from the resulting silicon-containing calcium-phosphate powder at concentration C=1÷5 wt %, the suspension is applied on the titanium alloy by a capillary method, dried at temperature T3=20÷25°C for 1 hour, then the said alloy is placed into the preliminarily obtained model solution of human intercellular liquid for 3 days, then it is removed from the solution and dried at temperature of T4=20÷25°C for 24 hours.EFFECT: production of silicon-substituted hydroxyapatite, while silicon plays an important role in the physiological processes of bone and cartilaginous tissue growth and restructuring.3 dwg, 1 tbl
ethod for obtaining of organomodified montmorillonite with polyfluoroalkyl groups // 2626414
FIELD: chemistry.SUBSTANCE: method for obtaining of organomodified montmorillonite with polyfluoroalkyl groups involves treatment of natural montmorillonite with polyfluorinated alcohol with ultrasonic dispersion in a solvent at heating and ultrasound frequency of 40 kHz, followed by modified montmorillonite separation, washing and drying. The treatment is carried out with 1,1,3-trihydroperfluoropropanol-1 in n-heptane at 30°C at the following component ratio, wt part.: montmorillonite - 100.0; 1,1,3-trihydroperfluoropropanol-1 - 8.7; N-heptane - 200.0.EFFECT: increased hydrophobicity of organomodified montmorillonite and stability of forming organomineral complexes, which allows to provide polymers with improved thermal, light, wear and hydrolytic stability.1 cl

ethod for optical determination of component, mainly hydrogen sulfide, and its concentration in gas flow // 2626389
FIELD: physics.SUBSTANCE: method for optical determination of a component, mainly hydrogen sulfide, and its concentration in a gas flow involves irradiating a sample of the test gas using laser radiation with different wavelengths, at which luminescent radiation in the UV or visible range is combined with the laser radiation in the near IR range to achieve threshold of intensity at which stimulated Brillouin scattering effect arises with the formation of Stokes components. Then, the spectral distribution of the intensity of the radiation passing through the sample is recorded, the excess of the received signal is determined above the threshold noise level and the absolute values of the obtained peaks and the main maximum corresponding to the laser radiation are compared. The sample of the test gas is irradiated in a gas analyzer chamber filled with water, which temperature is maintained in the range of 80-85°C. The presence of the component is identified by the frequency of the radiation maximum obtained as a result of stimulated Brillouin scattering, and its concentration is defined as the intensity logarithm of the Stokes component. The gas analyzer is placed directly in the gas flow zone, and at least one solid-state laser with semiconducting pumping built into the gas analyzer chamber is used as the laser irradiation source. The wavelength of the laser radiation in the UV and visible range is chosen within 200-530 nm, and in the near IR range - 810-1200 nm.EFFECT: possibility to determine the component, mainly hydrogen sulphide, and its concentration in the gas flow with high accuracy, and continuous process monitoring.4 cl, 4 dwg
ethod of reactivating spent actived carbon // 2626361
FIELD: chemistry.SUBSTANCE: method of reactivating spent activated carbon includes drying at 280-350°C and heat treatment in the presence of water vapor. First, the heat treatment is conducted in the presence of steam at 350-700°C with 3-7°C/min temperature rise rate. The heat treatment is then carried out at 750-850°C when feeding water vapor at the rate of 0.4-0.8 dm3/min.EFFECT: invention allows to increase the adsorption capacity of waste carbon and to use reactivated carbon for purifying air from benzene vapor.3 ex

Complex oxid of cadmium and iron and method of its production // 2626209
FIELD: chemistry.SUBSTANCE: method for producing complex cadmium oxide and iron of composition Cd1-xFexO, where 0.025≤x≤0.07 includes the preparation of a mixture of solutions of cadmium formate and iron formate in distilled water upon heating. The mixture is then evaporated to dry residue at 80-85°C in the air. The heat treatment of dry residue is carried out in two stages: stage I - at a temperature of 300-310°C for 0.5-0.6 hours and stage II at a temperature of 400-410°C for 2.0-2.5 hours.EFFECT: producing a new chemical compound with high magnetization values at room temperature.2 cl, 3 dwg, 4 ex
ethod of producing chromo acrylate (iii) // 2626007
FIELD: chemistry.SUBSTANCE: invention relates to the production of chromium (III) acrylate, which is used as a pigment added to varnishes, paints and thermosetting adhesives for coloring, to increase the resistance of coatings to aggressive media, and is used in the automotive, textile and furniture industries, and as a co-agent for the vulcanization of rubber compounds and as a catalyst for oxidation reactions. The process for the preparation of chromium (III) acrylate comprises the preparation of an aqueous solution of the sodium salt from aqueous solutions of equimolar amounts of unsaturated acid and sodium hydrogen carbonate, the introduction of a solution of chromium (III) chloride into the resulting solution of sodium salt, and isolation of the product by filtration, where acrylic acid is used as an unsaturated acid, and in a solution of chromium (III) chloride, polyethylene glycol with a wt mol. 400 g/mol, with a molar ratio of chromium (III) chloride and polyethylene glycol, equal to 1.5:2.25.EFFECT: simplification of the process for the production of chromium acrylate and the preparation of a highly disperse product.1 ex
ethod of obtaining aluminium oxide with structure χ-al2o3 // 2626004
FIELD: chemistry.SUBSTANCE: method of obtaining a nanodispersed phase with a structure χ-Al2O3 involves screening out the thermochemically activated gibbsite of the target fraction of the product of thermoactivation of gibbsite with a particle size of less than 120 mcm. The fraction is then heated in a muffle furnace at a rate of 20-100°C/min up to a temperature of 600-1050°C, followed by keeping it at this temperature for at least 0.5 h.EFFECT: increase in the particle size of the nanodispersed phase, increase thermal stability, simplify the production technology.1 tbl, 10 ex

ethod of producing nanopowder of cobalt ferrite and microreactor to this end // 2625981
FIELD: technological processes.SUBSTANCE: method comprises supplying the primary components - a mixture of solutions of cobalt and iron salts in the ratio corresponding to stoichiometry CoFe2O4, and an alkali solution in proportion to the salts solutions providing acidity of the medium in the range from 7 to 8, corresponding to the conditions of coprecipitation of the components, while the solutions of the primary components are supplied in the form of thin jets with a diameter of 50 to 1000 micron at the speed of 1.5 to 20 m/s colliding in the vertical plane at the angle of 30° to 160°, at the temperature in the range of 20°C to 30°C, and a pressure close to atmospheric pressure. The usage ratio of the primary components is set in such a way that when the jets collide, a liquid fog is formed in which the solutions of the primary components are mixed and engage. The microreactor for the method comprises a housing 1 and nozzles 2 with flow diffusers 3 for supplying primary components 10 and a nozzle 4 for products removal, the microreactor housing 1 is of a cylindrical shape with a conical bottom 5, a cover 6, the nozzles 2 with flow diffusers 3 for supplying primary components 10 are made with the possibility to provide fine adjustment of the jet direction, in the cover 6 coaxially to the housing 1 a nozzle 9 is provided for supplying purging gas, and an outlet nozzle 4 is installed in the bottom 5 to remove purge gas and reaction products. The area of the outlet nozzle 4 is 20-50 times bigger than the total area of all nozzles for supplying primary components. Two or more nozzles 17 may be installed in the cylindrical part of the housing to supply a surface-active substances solution in the form of thin jets with a diameter of 10 to 1000 micron, directed to the liquid fog of the primary components engaging solutions.EFFECT: invention enables to reduce the temperature and pressure necessary to make a synthesis of oxide nanoscale cobalt ferrite particles, to reduce energy costs and ensure continuity of the process with the possibility of its implementation on an industrial scale, to reduce the cost of equipment, to increase yield and selectivity of the process, to provide optimal conditions for rapid reactions via maintenance of stable and effective hydrodynamic conditions for reagents contacting and rapid removal of reaction products.3 cl, 5 dwg, 2 ex
ethod of conversion of underground hexafluoride of uranium by water steam // 2625979
FIELD: chemistry.SUBSTANCE: method of conversion of depleted uranium hexafluoride with steam includes a two-stage reaction of uranium hexafluoride with water vapor and hydrogen fluoride taken with excess in water with respect to uranium hexafluoride, producing in the first stage uranyl fluoride and a mixture of 1 hydrogen fluoride vapor and water, then the uranyl fluoride with water vapor to produce uranium oxide and a mixture of 2 hydrogen fluoride vapor, water and oxygen, combine mixture 1 and mixture 2 and rectify the obtained mixture to obtain anhydrous fluorine vapor of hydrogen, oxygen and liquid hydrofluoric acid with azeotropic composition, evaporation of hydrofluoric acid and vapor recovery to the first stage of conversion. At the same time, molybdenum contaminated with molten hydrofluoric acid is subjected to purification from molybdenum in the distillation apparatus to obtain molten fluorine acid-free vapors of azeotropic composition directed to the first stage of the conversion process and the liquid molybdenum-containing hydrobic acid of azeotropic composition derived from the scheme.EFFECT: invention makes it possible to use hydrofluoric acid of an azeotropic composition containing an impurity of molybdenum to return it to the basic conversion scheme and increase the yield of fluorine to anhydrous hydrogen fluoride.2 cl, 1 dwg, 5 ex
ethod of carbon nanotubes production by method of chemical vapor deposition // 2625978
FIELD: nanotechnology.SUBSTANCE: substrate is applied to the reactor, it has a nickel and/or cobalt and/or iron compound is applied, the compound is prepared by mixing and reacting the formates of these metals with a nitrogen-containing compound, such as a monodentate ligand from the range comprising ammonia and/or methylamine, and/or monoethanolamine in an amount of 18-42 g⋅E at 1 g⋅E of a metal formate or a bidentate ligand from a series comprising hydrazine and/or ethylenediamine and/or diethanolamine in an amount of 9-21 g⋅E at 1 g⋅E of metal formate. The substrate is a fabric of mineral or carbon fibers, for example a carbon-carbon composite material with a porosity of 2-20%; of a metal, for example, titanium, copper, tantalum, the surface of which has been pretreated with plasma electrochemical or hydrothermal oxidation; of carbon-ceramic composite material with a porosity of 0.5-10%. The substrate may have a complex surface geometry. In the reactor, the noted compound decomposes at high temperature to form a catalytically active particle shape without the use of a reducing gas medium. Carbon nanotubes are synthesised on the resulting particles with the subsequent supply of carbon compounds through a substrate serving to orient carbon nanotubes.EFFECT: invention makes it possible to synthesise carbon nanotubes on substrates of any composition and geometry, to increase the specific yield of nanotubes.8 cl, 3 dwg, 1 tbl, 8 ex
Extraction method of obtaining nanodimensional crystals of metal oxides // 2625877
FIELD: nanotechnology.SUBSTANCE: heterogeneous system, consisting of a water-soluble polymer and a phase-forming metal salt or an ammonium salt, is prepared in the distilled water to produce nanodimensional crystals of metal oxides by an extraction method. This forms a water-polymer and water-salt phase. An aqueous solution of the extracted metal sulphate, isolated from copper or zinc, is added to one of the phases. An aqueous solution of sodium or ammonia hydroxide is added to the other phase. After this, the prepared heterogeneous system with added additives is kept at a temperature of 25-80°C and atmospheric pressure for 1-24 hours. The precipitate, obtained in the interphase layer, is isolated, washed with distilled water and air dried until the mass change ceases. Nanodimensional copper or zinc oxide crystals are obtained. Polyethylene oxide (polyethylene glycol) with a molecular weight of 1500-20000 is used as the water-soluble polymer. A metal sulfate, selected from the group of Na, Li, Cu, Zn, Mg, Cd, Co, is used as a phase-forming metal salt. Sulfate is used as the ammonium salt.EFFECT: invention makes it possible to simplify the production of nanocrystals of metal oxides without the use of toxic, flammable and explosive organic solvents.6 ex, 6 dwg
ethod of obtaining emulsifying composition for impregnation of ammonium nitrate // 2625876
FIELD: chemistry.SUBSTANCE: method for producing the emulsion composition comprises the introduction of an anionic surfactant, which uses a 70% solution of calcium alkylbenzenesulfonate in isobutyl alcohol in an amount of 6-6.5 wt %, to a diesel fuel taken in an amount of 80 wt.%. When mixing, introduction to the system of received nonionic surfactant, which applies to ethoxylated castor oil in the quantity 3.5-4 wt %, followed by water drop by drop in the amount of 10 wt % at constant hashing.EFFECT: increasing physical stability of ammonium nitric explosives after their manufacturing, impregnation, storing both in normal conditions and in conditions of low-negative and high-positive temperatures.3 cl, 2 tbl, 4 ex

ethod of cleaning phosphoric acid by nanofiltration // 2625872
FIELD: chemistry.SUBSTANCE: invention relates to a process for purifying phosphoric acid obtained by treatment of the natural phosphate with a strong acid, comprising the step of filtering a phosphoric acid through a membrane of nanofiltration, wherein the nanofiltration membrane is an organic membrane nanofiltration, stable in an acidic environment, which is adsorbed at least one a water-soluble polymer comprising at least one amine functional group, one functional aromatic amino acid per functional group and/or one spirit functional group.EFFECT: method of purifying phosphoric acid solution, in which the organic life of nanofiltration membranes are usually more than about one year, while maintaining continuous operation during of this period of high performance in terms of permeability and resource.8 cl, 1 dwg, 2 tbl, 2 ex
ethod for uranium tetrafluoride production // 2625871
FIELD: chemistry.SUBSTANCE: uranium dioxide is mixed with ammonium bifluoride, the mixture of powders is placed in a closed container with limited air access, the closed container is placed in another container with a gap that is filled with carbon graphite material in the form of granules so that the granules completely cover the closed container, the resulting mixture is heat-treated at the stage of the formation of a double uranium salt in the air atmosphere at a temperature above the melting point of ammonium bifluoride, but below its boiling point and the double salt is heat-treated at the stage of its decomposition to uranium tetrafluoride at a temperature above the onset of carbon and graphite material oxidation but below the uranium tetrafluoride melting point.EFFECT: production of conditional uranium tetrafluoride with low oxygen content, high bulk density and yield more than 99 percent, process simplification.10 cl, 2 tbl
ethod for precipitated silica production, and product obtained according to this method // 2625850
FIELD: chemistry.SUBSTANCE: method for precipitated silica production includes feed slurry treatment with a soda solution, acid introduction to produce a silica precipitate, and then separation, washing and drying. Slurry of boronic acid production is used as the feed slurry. Prior to processing with a soda solution, this slurry is enriched to 50-65 wt % of silica content by flotation at pH of 6.8-8.5 and temperature of 30-40°C in the presence of liquid technical soap. The product obtained according to this method contains, wt %: 89-91 SiO2, 0.05-0.08 Fe2O3, 0.02-0.07 Na2O, 0.1-0.3 SO4, not more than 0.002 MnO and not more than 0.002 MgO, has a moisture content of 5.2-5.5%, water extract pH of 6.3-6.8 and specific surface of 165-170 m2/g.EFFECT: invention allows to improve the quality of the resulting silica.3 cl, 1 tbl, 2 ex
Block nanoporous carbon material for accumulation of natural gas, methane and method of its production // 2625671
FIELD: oil and gas industry.SUBSTANCE: nanoporous material is obtained from crushed carbonized and activated natural raw material of organic origin by mixing it with polymer binder and water, followed by moulding into blocks.EFFECT: increase in the amount of natural gas accumulated by the material, increase in the bulk density of the material, possibility of increasing the packing density of the material obtained in specialised collapsible adsorbers, which allows to fill the storage system in 95 percent or more of its volume while maintaining diffusion characteristics.5 cl, 3 ex

ethod of producng aluminium oxide // 2625575
FIELD: chemistry.SUBSTANCE: method for producing aluminium oxide includes washing, purification from metal oxides by means of hydrochloric acid and drying. As the starting material for the production of aluminium, an aluminous sludge formed after burning the solid-fuel rocket motor (SFRM) is used. The sludge is separated from the impurities by filtration. Then, purifying with a solution of 10% hydrochloric acid, washing with water without heat treatment and plasticization and drying are carried out.EFFECT: invention allows to simplify the production of aluminium oxide satisfying the requirements for non-metallurgical alumina, with reduction in acid consumption and energy consumption and increase in environmental friendliness.1 dwg,1 tbl
ethod for purifying aluminium-containing chloride solutions // 2625470
FIELD: chemistry.SUBSTANCE: method for purifying aluminium-containing chloride solutions from iron involves, at least, one stage of electrochemical purification of aluminium chloride solutions. Electrochemical purification is carried out at pH of 1.0-3.0, the cathode current density of 0.001-0.150 A/cm2 and the anodic current density of 0.015-0.200 A/cm2. Herewith the process temperature is 20-97°C.EFFECT: invention allows to increase the purification degree of aluminium-containing chloride solutions from iron, increase the efficiency of the process and reduce consumption of electricity.4 cl, 1 tbl, 1 ex

Device for preparation of potassium compounds and a method of extracting potassium compounds from a salt solution // 2625246
FIELD: chemistry.SUBSTANCE: device includes a continuous device for pre-treating the mixed salt stock obtained from the saline solution to obtain a particle size suitable for easy separation and sorting, a continuous device for extracting the total mass of potassium compounds, continuously separating and extracting the potassium compounds from the preliminarily treated, mixed salt raw material, a continuous device for separating and sorting potassium compounds, continuously separating and sorting potassium chloride and glaserite (Na2SO4⋅3K2SO4) from the extracted potassium compounds, and a device for continuous conversion of potassium sulfate, potassium sulfate extracting from the separated glaserite.EFFECT: invention provides a continuous process organization for large-scale commercialization, and eliminates the corrosion of equipment.31 cl, 8 dwg
Electrochemical method of producing phosphoric acid // 2625123
FIELD: chemistry.SUBSTANCE: invention relates to technology of inorganic substances, in particular, to recycling slime-contaminated white phosphorus and production of phosphoric acid. Method of producing phosphoric acid involves loading slime-contaminated white phosphorus into an electrolyser, where oxygen, obtained by electrolysis of water on a mesh anode, is used to oxidise slime-contaminated white phosphorus to form phosphorus pentoxide, followed by hydrating to form phosphoric acid. Direct current is fed to electrodes at voltage of 10 V, current density is 0.10 A/cm2, and processing time depends on amount of slime-containing white phosphorus. Conducting process according to proposed in a single apparatus enables to recycle phosphorus, contaminated with slime, and form intermediate phosphorus-containing compounds, preventing emissions of toxic compounds.EFFECT: technical result is recycling slime-contaminated phosphorus, obtaining pure phosphoric acid in a single apparatus and preventing loss of P2O5 with emissions into atmosphere.1 cl, 2 ex
ethod for obtaining modified titanosilicate of pharmacosiderite type // 2625118
FIELD: chemistry.SUBSTANCE: chloride titanium-containing reagent is used in the form of titanium tetrachloride or a mixture of titanium tetrachloride and hydrogen peroxide solution in a molar ratio of 1:(8-16) and added to the silicon-containing reagent as a collective solution of sodium silicate and sodium and potassium hydroxides. The content of the components in the resulting suspension should satisfy the molar ratio TiO2:SiO2:Na2O:K2O:H2O=l:(4,3-6):(6,4-8,7):(0,8-1):(195-700). The suspension is kept in sealed conditions at a temperature of 160-180°C for 8-20 hours to form a solid phase in the form of pharmacosiderite type titanosilicate. The solid phase is separated from the mother liquor, washed with distilled water and dried. Then, the titanosilicate is modified by treatment with a solution containing hydrazine at a concentration of 0.50-1.14 g/l at T:G=1:(100-400) for 0.3-2 hours. The modified titanosilicate is separated, washed with distilled water and dried. The extraction of noble metals in mg per g of the modified product is: gold 260-275, platinum 110-134, palladium 119-141.EFFECT: method allows to obtain a monophasic hydrazinium-modified titanosilicate of the pharmacosiderite type, which has a high sorption ability with respect to noble metals.5 cl, 5 ex

Synthetic gas of regulated composition production plant // 2625117
FIELD: oil and gas industry.SUBSTANCE: synthetic gas production unit of the regulated composition includes the convection type catalytic converter with the burner, it is equipped with the supply lines of sulfur-free hydrocarbon feedstock and fuel, the synthetic gas and flue gas exhaust lines, the water treatment unit, connected by the deionizate supply line to the feed line. The converter is the low-temperature hydrocarbon feed converter, connected by the synthetic gas inlet/outlet lines and the raw stock mixture of raw materials and deionizate with the device for recuperation heating and separation, equipped with the purge water supply line to the water treatment unit. The methane recovery device is installed on the synthetic gas exhaust line from the converter, it is equipped with the water condensate supply lines to the water treatment unit and the methane output line connected to the converter.EFFECT: synthetic gas production of the specified composition and reduction of the fuel consumption.2 cl, 1 dwg
Process of producing finely dispersed amorphous microsilica by sol-gel method // 2625114
FIELD: chemistry.SUBSTANCE: process for producing finely dispersed amorphous microsilica by sol-gel method. The process comprises a preliminary drying and milling diatomite. The micronized diatomite added 10-30% sodium hydroxide solution, incubated at 70-90°C for 2-3 hours at a ratio of liquid and solid phases 12: 1. Silicic acid precipitation is carried out from the filtrate by addition of concentrated hydrochloric acid solution. Separate the precipitate of silica and dried.EFFECT: invention provides a dispersion of fine amorphous microsilica 0,062-0,097 micron with high purity from inexpensive mineral raw materials in a high yield the desired product.3 tbl
 
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