Inorganic chemistry (C01)

C   Chemistry; metallurgy(311501)
C01            Inorganic chemistry(20496)
ethod of producing cation-substituted tricalcium phosphate // 2607743
FIELD: chemistry.SUBSTANCE: invention relates to chemical and medical industries and can be used in production of initial biocompatible material, suitable for making dense and porous ceramics, applicable as scaffolds in engineering of bone tissue, targets for creation of coatings on metallic implants in surgery and dentistry and in other fields of medicine. Method of producing cation-substituted tricalcium phosphate is described by deposition of average calcium phosphates, formed during pouring off and constant mixing of aqueous solutions of calcium nitrate and disubstituted ammonium phosphate, taken in molar ratio of 3:2, at pH 7.0 with subsequent filtering of formed precipitate and its thermal treatment at temperatures of 700–1,300 °C. Wherein calculated amount of solutions of salts of nitrates or acetates, or chlorides of following elements is added to reaction mixture: iron, zinc, copper, sodium, potassium, strontium, barium bismuth, silicon at following ratio of reagents, mol%: calcium nitrate – 40–59.9, disubstituted ammonium phosphate – 40; salt – 0.1–20.EFFECT: powders formed after thermal treatment are characterized by homogeneous phase composition, corresponding to whitlokite structure, finely dispersed state with particle size of 20 nm to 2 mcm and antimicrobial activity.1 cl, 1 tbl, 4 ex
Novel method of producing silicon dioxide // 2607741
FIELD: chemistry.SUBSTANCE: invention is intended for chemical industry and can be used for making substrates for catalysts, absorbents, agents against caking or increasing viscosity of structure, additives to dental pastes and paper, fillers for polymer compositions. First, raw material containing water with pH of 2–5 is made and simultaneously silicate and diluted acid are added to it. After achieving congelation point concentrated acid is added to maintain specified value of pH. Then adding of concentrated acid is stopped, adding of silicate is continued. After achieving pH 7–10 silicate and acid are simultaneously added again to maintain specified value of pH. Then adding of silicate is stopped, continuing to add acid to bring pH less than 6. Obtained suspension of silicon dioxide is separated and dried by spraying.EFFECT: invention reduces power consumption and increases efficiency of production of fine-grained silicon dioxide, while preserving all its properties and characteristics.17 cl, 2 ex
Separation of multicomponent gas mixtures by short-cycle unheated adsorption with three-stage extraction of target gas of high purity // 2607735
FIELD: chemistry.SUBSTANCE: invention relates to chemical industry and can be used in production of nitrogen, oxygen and argon from atmospheric air. Method involves using multiple adsorption columns. Main columns (1, 2) are filled with adsorbent which absorbs non-target components of gas mixture, and auxiliary adsorption columns (3) are filled with adsorbent which absorbs target component of gas mixture. Raw gas mixture under excess pressure is fed into main adsorption columns (1, 2), after which end product-rich gas is moved into auxiliary adsorption columns (3), where adsorbent absorbs target gas. After that, target gas is separated from adsorbent and moved back into main adsorption columns (1, 2), where pressure of target gas is raised while bringing it to high purity. Adsorbents are selected so that saturation time of adsorbent in main adsorption columns is approximately twice longer than saturation time of adsorbent in one or more auxiliary adsorption columns.EFFECT: invention enables to reduce complexity of process diagram, overall dimensions and material consumption of plant.6 cl, 1 tbl, 1 dwg
Biocompatible nanomaterial for photosensitivity singlet oxygen and method for production thereof // 2607579
FIELD: medicine.SUBSTANCE: group of inventions refers to medicine, in particular to oncology, and describes a biocompatible nanomaterial and method of its production. Proposed biocompatible nanomaterial is a hybrid associates of colloidal quantum dots CdS with average size of 2–4 nm with cations of methylene blue (MB+) in concentration 10-1–10-4 (νpaints/νCdS). Method involves double jet merging of 0.6–5 % solution of sodium sulphide and 0.8–7 % solution of cadmium bromide with melt of gelatin with producing of colloidal solution, containing colloidal quantum dots of CdS, solution is held at temperature of 4–10 °C, produced gelatine jelly is crushed to grain with size 5–10 mm, washed in distilled water at temperature from 7 to 13 °C for 30 minutes, decant excess water and granules are heated to temperature above 40°C. Nanomaterial is highly efficient generation of singlet oxygen and satisfactory parameters of cytotoxicity, testifies to its biocompatibility.EFFECT: invention can be used in medicine and biology for photodynamic therapy of oncological and other human diseases.2 cl, 6 dwg
White pigment // 2607406
FIELD: chemistry.SUBSTANCE: invention relates to chemical industry and can used in production of pigments for varnishes and paints. Pigment contains shell and core. Shell is made of titanium dioxide. Core is made of a mixture of kaolin, aluminium hydroxide and aluminium oxide with total content of aluminium silicates, aluminium hydroxide and aluminium oxide of not less than 97 %. Weight ratio of total content of aluminium oxide and aluminium hydroxide to content of aluminium silicates ranges from 1:1 to 1:2. Weight content of aluminium hydroxide ranges from 10 to 25 wt% with respect to total weight of core. Weight ratio of shell material to material of core varies from 0.66 to 4 at ratio of core material 2–5 mcm, and shell material from 0.2 to 0.5 mcm.EFFECT: invention improves quality of pigment, increases resistance to destruction in operating conditions in acidic precipitation, storage and transportation.1 cl, 10 ex
ethod of producing endohedral nanostructures based on implanted ions channeling // 2607403
FIELD: nanotechnology.SUBSTANCE: method of producing endohedral nanostructures involves introduction of accelerated ions, for example metal ions, in polyhedral nanostructures, for example, fullerene molecules. Relative position of polyhedral nanostructure and oncoming implanted ion is fixed with nanochannels of track membrane, which is implanting, in which collision takes place. Nanochannels have doubly conical shape with internal narrowing to impede transition of molecules of polyhedral nanostructure from one side of membrane to the other, focusing of moving ion to center of nanochannel and releasing of polyhedral nanostructural molecule from it after ion implantation. Part doubly conical shape nanochannel and track membrane surface between nanochannels are made conducting from the side of supply of molecules of polyhedral nanostructures to provide accelerating and focusing potential, applied to molecules of polyhedral nanostructure in nanochannel. Second track membrane is used to form ion flow structure, which is membrane of ion source, made in single process with the first one, and repeating structure of nanochannels’ location on first implanting membrane. Controlled DC voltage is supplied between above track membranes. Volumes of reactor with flows of transmitted polyhedral nanostructures, ions, as well as obtained endohedral nanostructures, are separated with implanting membrane and kept in these temperatures providing supply and required aggregate state of materials, involved in process of implantation, as well as removal of products from implantation area. When producing endohedral structures in solution, polar solvent is used, in which molecules of polyhedral nanostructures obtain negative charge, and implanted ions obtain positive charge.EFFECT: output of endohedral nanostructures is increased.1 cl, 4 dwg
ethod of producing carbon-carbon composite material // 2607401
FIELD: medical equipment.SUBSTANCE: invention can be used for the manufacture of thermal protection parts and medical devices. First produce a porous reinforcing base of carbon fibers on the surface of the carbon heater by the methods of laying or winding of carbon filaments, bundles, strips, fabrics or felt. Heater is made of carbon plate with a ratio of length:width of at least 1 and is located inside the reinforcing base. Then pyrocarbon matrix is formed in a medium of gaseous hydrocarbons at a temperature above the temperature of their decomposition under temperature gradient conditions created by heater.EFFECT: invention allows to simplify the production of flat plates of carbon-carbon composite material and to provide their optimum reinforcement, and hence mechanical strength.1 cl
White pigment // 2607221
FIELD: chemistry.SUBSTANCE: invention relates to chemical industry and can be used for making pigments for varnishes and paints. White-color pigment contains shell and core. Shell is made of titanium dioxide. Core is made of mixture of kaolin and aluminium oxide with total weight content of aluminium silicates and aluminium oxide of not less than 97 %. Weight ratio of aluminium silicates to aluminium oxide ranges from 2 to 4. Weight ratio of shell material to core material varies from 0.66 to 3 at core material ratio from 2 to 5 mcm and shell material from 0.2 to 0.5 mcm.EFFECT: invention allows to improve quality of pigment due to creation on surface of core dense shell of titanium dioxide, resistant to destruction in operating conditions at acidic precipitation, storage and transportation.1 cl, 11 ex
Process for preparing precipitated silica comprising high compaction step // 2607218
FIELD: technological processes.SUBSTANCE: present invention relates to a method of producing precipitated silica. Method comprises reacting silicate with an acidifying agent to obtain a precipitated silica suspension, followed by a separating step to obtain a cake and a step of drying said cake. Step of compacting said cake at a pressure greater than 10 bar but less than 45 bar is carried out between separating step and drying step.EFFECT: invention provides cost-efficiency of process and higher output.11 cl, 2 ex
ethod of producing fibrous sorbent for extracting scandium // 2607215
FIELD: chemistry.SUBSTANCE: invention relates to production of ion-exchange materials and sorbents. Disclosed is a method of producing fibrous ionite for extraction of scandium, including amination of polyacrylonitrile fibre with 35–40 % solution of ethyleneamine at a temperature of 90–100 °C, and phosphorylation of aminated fibre with phosphorous acid in an acidic medium in presence of formalin at temperature of 90–100 °C for 4.5–5 hours.EFFECT: invention simplifies technology of synthesis and increases selectivity of material to scandium ions.1 cl, 4 tbl, 17 ex
ethod and system for generating sulphur seeds and granules // 2606982
FIELD: chemistry.SUBSTANCE: invention relates to chemical industry. Device comprises cooling tank (4) storing a liquid, first sprayer (2), granulating drum (6), conveyor (20) for conveying sulphur seeds. First sprayer (2) is configured for spraying molten sulphur in liquid in cooling tank (4) to form sulphur seeds.EFFECT: invention provides a more efficient process of producing sulphur seeds, which can be enlarged to sulphur granules.21 cl, 19 dwg
ethod of processing nepheline ore // 2606821
FIELD: technological processes; mining.SUBSTANCE: invention relates to a method of processing alumina-containing material and can be used in sintering technology of producing alumina and soda products from nepheline ore. To reduce consumption of nepheline ore in a nepheline-limestone-soda charge, ash-slag wastes are added in an amount from 0.1 to 10 % of weight of nepheline ore.EFFECT: nepheline ores and recycling of ash-slag wastes with post-extraction of valuable components therefrom.1 cl, 5 tbl
ethod of producing construction material // 2606741
FIELD: construction.SUBSTANCE: invention relates to construction and relates to industry of construction materials, particularly, to production of any types of construction articles, road surfaces, and can be used in residential and industrial construction, construction of roads, in casting, chemical production and other fields. Method of producing construction material involves mixing silica and 5% alkaline solution at a ratio of dry and liquid components of 1:1 with simultaneous exposure of mixture to an electromagnetic field until complete dissolution of silica, adding obtained solution in amount of 4 % to 8 % of total volume of mixture to silica-containing raw material, including 5–10 % or 15 % cristobalite of total volume of mixture, then stirring mixture until complete wetting of silica-containing raw material, moulding articles from obtained mixture and processing by drying at a temperature of 40 °C to 80 °C or by steaming article at a temperature of 90 °C–120 °C, or by exposing article to microwave radiation. Invention is developed in subclaim.EFFECT: technical result is simplification of production of articles, high heat resistance, water resistance, strength, acid resistance, low water absorption.1 cl, 1 dwg, 1 tbl, 3 ex
Reforming apparatus, reforming method, apparatus for producing chemical products equipped with reforming apparatus and method of producing chemical products // 2606606
FIELD: oil and gas industry.SUBSTANCE: invention relates to petrochemical industry. Natural gas 21 is fed into compressor 11. Compressed natural gas 21 is successively heated in fourth 20 and first 12 heat exchangers. In first heat exchanger 12 heat source used is flue gases 22. Heated natural gas 21 is fed into desulphuration device 13. In apparatus 14 there is reforming of natural gas purified from sulphur-containing compounds, and H2 and CO or H2 and CO2 are obtained. Gas subjected to reforming is used for synthesis of ammonia, urea and methanol. In second heat exchanger 16 air 26 used for heating in reforming apparatus 14 is heated. Water 75 is heated by flue gases 22 in third heat exchanger 19.EFFECT: invention improves thermal efficiency during reforming of natural gas, prevents corrosion, improves efficiency of producing ammonia, urea and methanol.6 cl, 19 dwg, 6 ex
ethod of producing high-purity indium monoiodide // 2606450
FIELD: chemistry.SUBSTANCE: invention relates to inorganic chemistry and concerns production of high-purity indium monoiodide. Method of producing high-purity indium monoiodide does not require starting materials of high purity. Method involves reaction of indium metal, taken with 10 % stoichiometric excess, with iodine at atmospheric pressure in quartz installation at a temperature of 400±5 °C, followed by purification of product by rectification. Rectification is carried out in an argon atmosphere in same installation in which synthesis is carried out. Maximum possible output of product is 85–88 %.EFFECT: invention simplifies process of producing high-purity indium monoiodide, improves efficiency and environmental friendliness of process.3 cl, 4 dwg, 1 tbl, 7 ex
ethod of activating aluminium for producing hydrogen // 2606449
FIELD: chemistry.SUBSTANCE: invention relates to production of hydrogen as a result of chemical reaction components hydro-reacting composition, more specifically to a method of activating aluminium for hydrogen generation, and can be used in designing hydrogen cartridges for small-size power sources on fuel elements. Method of activating aluminium for hydrogen production includes preparation of a mixture of components of indium, tin and gallium, preferably, at a ratio of 20:20:60 wt%, heating mixture until obtaining an eutectic alloy, which is then mixed at normal conditions in an inert atmosphere with powdered aluminium and abrasive substance with particle size 0.5-1.5 mm, mainly, from a group of sodium chloride or aluminium oxide, then mixture is subjected to mechanochemical treatment in an inert atmosphere at temperature 20-80°C for 5-20 minutes.EFFECT: invention allows more complete oxidation of activated aluminium with low content of gallium and indium in hydro-reacting composition, increases rate of hydrogen generation and providing possibility of its adjustment, as well as higher profitability aluminium activation technologies.1 cl, 1 dwg, 5 ex
Pigment for absorbing heat-stabilising coatings // 2606446
FIELD: chemistry.SUBSTANCE: invention relates to production of pigments and coatings for passive methods of heat stabilisation of objects. Described is a method of producing a pigment for absorbing heat-stabilising coatings based on manganites of rare-earth elements, having phase transition in dependence of emissivity on temperature, a having general formula La(1-x) Srx MnO3, involving using mixture of powders La2O3, SrCO3 and MnCO3, mixing and heating to formation of solid solution with subsequent grinding, where heating is carried out in two successive steps: first for 2 hours at 800 °C, then for 2 hours at 1,200 °C, wherein heat stabilising pigment has strontium concentration of 20 wt%.EFFECT: method of producing pigment with good heat stabilising properties and increased variation range of emissivity in region of phase transition.1 cl, 1 tbl
Processing carbon dioxide-riched fraction from plant for producing hydrogen and carbon monoxide // 2606439
FIELD: gas industry.SUBSTANCE: invention relates to a method of processing a carbon dioxide-enriched gas mixture formed when producing a synthesis gas. Method involves passing a raw material containing hydrocarbon through pipes located in a heating chamber of a steam reforming heated by reactor burners, herewith the raw material is converted into a crude synthesis gas containing hydrogen, carbon monoxide, carbon dioxide, as well as hydrocarbons, separation from the crude synthesis gas of a gas mixture enriched with carbon dioxide containing oxidizing substances, thermal treatment of part of the gas mixture enriched with carbon dioxide containing oxidizing substances in an oxygen-containing atmosphere and combustion of the oxidizing substances.EFFECT: invention provides efficient processing a carbon dioxide-enriched gas mixture.10 cl, 1 dwg
anufacture and use of composite structure containing precipitated carbonate // 2606433
FIELD: chemistry.SUBSTANCE: invention relates to a composite structure and a method of producing a composite structure having a polysaccharide body on which is a carbonate is deposited, characterised by that it comprises preparing a solution of carbonate ions; mixing polysaccharide in a form, having free hydroxyl groups on its surface, with solution of carbonate ions to produce carbonate-polysaccharide suspension; and depositing carbonate salt from suspension onto polysaccharide.EFFECT: precipitated carbonate-polysaccharide structure, which, when it is used as filler, improves structural strength of paper or cardboard, gypsum board, plastic or rubber, inter alia, as well as level of rigidity and optical properties (whiteness and opacity) of paper or cardboard together with other fillers or separately from them, in particular with carbonates; furthermore, invention improves hardening of printing ink on surface of paper or cardboard.21 cl, 7 dwg, 7 tbl
Reducing aluminosilicate scale in bayer process // 2606323
FIELD: technological processes.SUBSTANCE: invention provides a method of inhibiting accumulation of aluminosilicate scale in liquor circuit of Bayer process equipment. Method involves adding into stream of aluminosilicate scale inhibiting composition containing one or more molecules based on determined silane, in fluid circulation circuit of liquor. Such scale inhibitors reduce scaling and, thus, increased carrying capacity on fluid, increase period of time during which Bayer process equipment can operate, and reduce need for expensive and hazardous washing of acid Bayer process equipment.EFFECT: invention provides considerable reduction of total costs for operation of Bayer process.12 cl, 2 ex, 2 tbl, 2 dwg
Extraction of helium from natural gas streams // 2606223
FIELD: gas industry.SUBSTANCE: invention relates to method and system for extracting helium from natural gas in a high pressure process. Method includes steps of, passing a stream of compressed high pressure natural gas through a cooling chamber for condensation of at least part of stream of compressed natural gas to produce a cooled stream, feeding cooled stream into a cryogenic distillation column, extracting helium raw product from upper part of cryogenic distillation column and extracting a stream of liquid product from lower part of cryogenic distillation column. Temperature in cooling chamber is controlled by flash evaporation of first part of liquid product stream in cooling chamber to form a first stream of throttling gas at first pressure and flash evaporation of second part of liquid product stream into cooling chamber to form a second stream of throttling gas at pressure, that is higher than first pressure, and temperature in cooling chamber is controlled by controlling ratio of first part to second part. Wherein flash evaporation is performed by means of Joule-Thomson valve.EFFECT: technical result is producing helium with high concentration.20 cl, 7 dwg, 3 tbl, 3 ex
ethod for production of synthesis gas // 2605991
FIELD: chemistry.SUBSTANCE: invention relates to organic synthesis, specifically to methods of producing synthesis gas, oxidation of hydrocarbon raw material with air, oxygen or mixture thereof using released energy, and can be used for processing hydrocarbon material in oil and gas industry. Method for production of synthesis gas involves obtaining by partial oxidation of hydrocarbons liquids or gases in a reactor at isobaric conditions using an oxidising agent, for example, oxygen or air, or mixture thereof, conversion of energy (pressure and heat) of synthesis gas into electric energy is carried out in gas-turbine plant and/or conversion of thermal energy of synthesis gas into electrical energy using steam or gas as heat carrier in steam-turbine gas-turbine plants, and conversion of energy (pressure and heat) of synthesis gas into electric energy in gas-turbine plant is performed without its burning in one or more steps, and conversion of heat energy of synthesis gas into electric energy is carried out at temperature of synthesis gas before gas-turbine plant and/or after it, as well as at pressure of synthesis gas equal or less than pressure value, wherein produced electric energy provides technological processes of preparing hydrocarbon raw materials for oxidation and water treatment, for production of oxidising gent, correction of composition at molar ratio H2/CO and thermobaric parameters of synthesis gas.EFFECT: technical result is higher efficiency of producing synthesis gas.9 cl, 4 dwg
ethod for complex processing of ash from burning coal // 2605987
FIELD: technological processes.SUBSTANCE: invention relates to complex processing of ashes from burning coals. Method involves blending the ash with sodium hydroxide, sintering at the temperature of 150–200 °C, leaching the sinter, separation of phases, desiliconization of the solution by adding sodium hydroalumosilicate into the solution. In compliance with this method prior to leaching the sinter it is washed with water to obtain a first silicate solution, the washed sinter is leached with sulphuric acid, the produced pulp is separated by filtration. Desiliconization of the solution is performed till complete extraction of silica to obtain a solution of aluminium sulphate and a silica-containing residue. Residue is dissolved in an alkaline solution to obtain a second silicate solution, which is combined with the first silicate solution directing further to produce white soot by carbonization. Technical result is reducing the sintering temperature and reducing consumption of reagents when reaching the alumina extraction at the level of 94.4–96.7 % and the silica extraction at the level of 93.9–98.2 %.EFFECT: lower sintering temperature and reduced consumption of reagents.1 cl, 1 tbl, 2 ex
Fibre precursor for carbon fibres, carbon fibre and method of producing carbon fibre // 2605973
FIELD: chemistry.SUBSTANCE: invention relates to fibre precursor for carbon fibres, carbon fibre and a method of its production. Fibre precursor of carbon fibre contains a polymer of general formula (1): (1), where Ar1 is an aryl group, expressed by any structural formulae (1)-(5), and Ar2 is an aryl group, expressed by structural formula (6) or (7), except a combination, where Ar1 is a group, expressed by structural formula (3), and Ar2 is a group, expressed by structural formula (6), and combination, where Ar1 is a group, expressed by structural formula (1), and Ar2 is a group, expressed by structural formula (6): .EFFECT: technical result is obtaining carbon fibre with excellent mechanical strength without non-fusible treatment.8 cl, 10 dwg, 1 tbl, 2 ex
ethod of producing crushed active coal // 2605967
FIELD: manufacturing technology.SUBSTANCE: invention relates to production of activated carbon based on nut shells and kernels, which can be used for purification of drinking water, as well as various liquids and solutions. Disclosed is a method for production of crushed active coal, including carbonisation, crushing carbonated coal, sieving of its grains, activation with steam and cooling. Carbonisation is carried out at a rate of raising temperature 3–8 °C/min to final temperature of 450–550 °C. Activation is carried out at temperature of 820–850 °C to burnt product 30–45 wt%.EFFECT: disclosed method enables to obtain crushed active coal with high adsorption capacity during extraction of chloroform and chlorophenols from water.1 cl, 3 ex

High-emissive coating compositions and methods for production thereof // 2605880
FIELD: technological processes.SUBSTANCE: group of inventions relates to high-emissive coating compositions and methods of their production. Thermionic coating composition for a substrate includes a dry mixture of substances increasing emission capacity of the coating, herewith the substances increasing emission capacity of the coating contain titanium dioxide, and substances, which increase mechanical strength. In another version the composition additionally contains a solution-based component containing phosphoric acid. Method of producing the coating involves determination of a specified level of the coating emission capacity, determination of concentration of titanium dioxide, determination of adhesion properties and manufacturing of the thermionic coating composition.EFFECT: technical result is increased heat emission by radiation.35 cl, 5 dwg, 4 tbl, 7 ex

ethod and device for sulphur compounds extraction in hydrocarbon flow // 2605747
FIELD: technological processes.SUBSTANCE: present invention relates to sulphur compounds in hydrocarbon flow extracting method. Method involves supply of hydrocarbon flow containing sulphur compounds, into preliminary washing zone, containing ammonia, extraction of hydrocarbon flow subjected to preliminary washing from preliminary washing zone and supply of hydrocarbon flow subjected to preliminary washing into mass transfer zone for extraction of one or more thiol compounds from hydrocarbon flow subjected to preliminary washing. Said mass transfer zone includes hollow-fiber membrane contactor, and thiol compounds removal takes place through pores in pipes wall.EFFECT: said method enables to minimize number of equipment required for thiol compounds removal, and wherein liquefied petroleum gas or light naphtha have required characteristics.11 cl, 3 dwg
ethod of precipitated silicon dioxides producing // 2605709
FIELD: technological processes.SUBSTANCE: present invention relates to a method of producing precipitated silica. Production method involves reaction of silicate and acid in presence of electrolyte. Reaction is carried out in four stages. Acid used is at least one of stages, is concentrated acid, selected from group formed by sulphuric acid with concentration of, at least, 80 wt%, in particular, at least, 90 wt%, acetic acid or formic acid with concentration of, at least, 90 wt%, nitric acid with concentration of, at least, 60 wt%, phosphoric acid with concentration of, at least, 75 wt%, hydrochloric acid with concentration of, at least, 30 wt%. Produced suspension is dried by spraying.EFFECT: invention enables production of spherical shaped silicon dioxide, effective as reinforcing filler.15 cl, 2 ex
ethod of producing silica gel // 2605707
FIELD: manufacturing technology.SUBSTANCE: invention relates to production of silica gel. Method involves mixing sodium silicate solution with aluminium sulphate solution to obtain a sol, which changes into gel. Mixing of solutions is performed at temperature not higher than 10 °C with concentration of sodium silicate 1.7-2.0 mol/dm3 and concentration of aluminium sulphate 0.45-0.48 mol/dm3. Obtained Sol is moulded into balls, which are held in circulating stream of sodium sulphate solution, said balls are washed, first with sulphuric acid, then with purified water or steam condensate. Drying is performed at temperature of 70 °C to 180 °C and calcining at 360-400 °C without access of water vapour. Obtained silica gel contains 96-97 % silicon dioxide and 3-4 % aluminium oxide.EFFECT: invention provides higher operational characteristics of silica gel during extraction of petrol-containing components.3 cl

ethod of producing compounds of transition metals, transition metal compounds and use thereof // 2605706
FIELD: chemistry.SUBSTANCE: invention relates to a method of producing compounds of transition metals of overall composition MeaCbNcHd, where Me is a transition metal or a mixture of transition metals, a = 1-4, b = 6-9, c = 8-14, d = 0-8. In method, reaction mixture consisting of transition metals and/or compounds of transition metals and uncondensed or low-condensed C-N-H-compounds, undergoes heat treatment in a first temperature range 150-570 °C. Content of transition metals and/or compounds of transition metals is at least 6 mol%, preferably, 10-40 mol%, in relation to reaction mixture. Uncondensed or low-condensed C-N-H-compounds used are cyanamide, and/or ammonium dicyandiamide, and/or dicyandiamide, and/or melamine. Invention also relates to thus obtained compounds of transition metals and their use.EFFECT: providing cheap production of materials with a cubic phase.31 cl, 2 dwg, 1 tbl, 20 ex

ethod of extracting helium and device therefor // 2605593
FIELD: chemistry.SUBSTANCE: method and device for increasing extraction degree of helium are described. Stream containing helium and at least one oxidisable component is fed into an oxidation zone in presence of oxygen to oxidise oxidisable component to form a first vapour stream and a first liquid stream. First vapour stream is fed into an adsorption zone at variable pressure to a purified helium stream and tail gas stream. Tail gas stream is compressed. Compressed tail gas stream is fed into a membrane separation zone for formation of helium-rich permeate stream and a retentate stream. Helium-rich permeate stream is compressed and returned to oxidation system.EFFECT: technical result is higher degree of helium extraction by post-extraction thereof from permeate.20 cl, 1 dwg, 1 tbl, 1 ex

ethod of producing granular nanocrystalline hydroxylapatite // 2605296
FIELD: pharmaceutics.SUBSTANCE: invention relates to pharmaceutical industry, namely to method of producing granular nanocrystalline hydroxylapatite (GAP). Method of producing granular nanocrystalline hydroxylapatite involves synthesis of hydroxyapatite in saturated solution of calcium hydroxide, decanted after daily settling from settled aggregates of Ca(OH)2, by adding alkali solution of orthophosphoric acid, while stirring constantly, until pH reaction of mixture is above 10, then it is settled, liquid phase is decanted and frozen, obtained colloid solution of high-purity nanohydroxyapatite is freezed in liquophilic chamber, which is preliminary cooled; that is followed by freeze-drying in vacuum at temperature of -5 °C and ready granules are separated into fractions.EFFECT: described method enables easy and reliable production of granules of nanocrystalline high-purity GAP in range of ½ to 2 mm.1 cl, 1 dwg, 2 tbl, 6 ex

Polymer composition for producing silicon carbide // 2605257
FIELD: chemistry.SUBSTANCE: invention relates to chemical industry for producing heat-resistant highly porous articles from silicon carbide, which are used as filters, heat insulation, absorbents. Polymer composition for producing silicon carbide of stoichiometric composition in form of finished porous articles contains powdered phenol binder based on novolac phenol-formaldehyde resin and urotropin, lubricant in form of zinc stearine or zinc stearate, and a silicon dioxide support, in form of ground quartz fibre from industrial wastes of their production, in following ratio of components, wt%: ground quartz fibre - 45.2-48.7; phenol binder - 46.1-52.0; lubricant - 2.0-5.5.EFFECT: invention widens raw material sources for producing silicon carbide, improves chemical purity of finished product, as well as rational use of industrial wastes for production of quartz fibre.1 cl, 1 tbl, 5 ex
ethod of water-repelling clinoptilolite tuff producing // 2605126
FIELD: technological processes.SUBSTANCE: invention relates to production of organo-mineral sorbents based on natural aluminosilicates. Method of hydrophobic sorbent producing from clinoptilolite tuff involves clinoptilolite tuff heat treatment till constant weight, activation at high temperature in 4.0 M hydrochloric acid solution, washing with water, drying to constant weight, treatment with dimethyldichlorosilane or trimethylchlorosilane solution. Said treatment is carried out at solvent boiling point, followed by washing with toluene and drying.EFFECT: technical result consists in method simplification with maximum degree of modifier grafting.1 cl, 3 ex

Process for dry quenching of coke with steam with subsequent use of synthesis gas produced // 2605125
FIELD: chemistry.SUBSTANCE: present invention relates to by-product coke industry. Coal (2) is heated in coke oven (1). Obtained coke (5a) is pushed out into coke quenching car (6) and moved to coke quenching device (7). Incandescent coke (5a) is quenched to a temperature below kindling temperature by means of steam (8) under exclusion of air. Steam (8) for quenching is first divided into at least into two substreams. One substream of steam (8) is fed into coke quenching device (7) from below upwards in vertical flow direction, and substream of steam (8) is fed into part of coke quenching device (7), in which coke (5a) to be quenched has a temperature of 500-900 °C. Obtaining synthesis gas (9).EFFECT: invention enables to efficiently recycle coke heat.12 cl, 1 dwg

ethod and device for producing biologically active drinking water with low content of deuterium // 2605123
FIELD: technological processes.SUBSTANCE: invention relates to a method of producing drinking water with low content of deuterium and a device for its implementation. Method includes cooling drinking water by adding granules of solid carbon dioxide with the water to carbon dioxide ratio of 1:10, mixing for 15-20 minutes with the mixer rotation speed of 45-50 rpm, water treatment with low-frequency electromagnetic field within the range of 18-48 Hz in the process of mixing, filtration through a metal-ceramic biofilter to produce the liquid and the solid phases, collection of the liquid phase deuterium-impoverished, heating and utilization of the solid phase.EFFECT: invention provides efficient production of drinking water with low content of deuterium.1 cl, 1 dwg

Composite nanocrystalline catalyst for propane cracking to obtain olefins and method for its production // 2604884
FIELD: petroleum chemistry.SUBSTANCE: invention relates to petrochemistry. Composite nanocrystalline catalyst for propane cracking to obtain olefins contains nanocrystalline aluminium oxide, modified with titanium oxide or silicon oxide with mass fraction of latter from 0.35 to 5 %. Method of producing composite nanocrystalline catalyst involves obtaining nanofibrous aerogel of aluminium oxide by oxidation of aluminium plate by humid air at room temperature and impregnation of produced carrier with solutions of titanium isopropoxide (IV) or triethoxychlorosilane at increasing temperature from 373 K to 473 K, with further crystallization in stream of hydrogen at increasing temperature from 600 K to 1,200 K or in hydrogen atmosphere at temperature of 1,200 K.EFFECT: use of catalyst provides high yield of olefins.2 cl, 2 tbl

Nanocrystalline catalyst for cracking propane in order to obtain olefins and method for production thereof // 2604882
FIELD: petroleum chemistry.SUBSTANCE: invention relates to petrochemistry. Nanocrystalline catalyst for cracking propane in order to obtain olefins is a nanocrystalline form of aerogel of aluminium oxide. Method of producing nanocrystalline catalyst for cracking propane in order to obtain olefins involves amalgam oxidation with further crystallisation of nanofibrous aluminium oxide in a stream of hydrogen at temperature starting from 600 K and each hour of raising temperature by 50° and reaching temperature of 1,200 K, which is maintained for 10 hours or in a hydrogen atmosphere for 5 hours.EFFECT: use of catalyst provides high yield of olefins.2 cl, 2 tbl

Diamond-carbon substance and preparation method thereof // 2604846
FIELD: chemistry.SUBSTANCE: invention relates to production of highly active diamond-carbon materials, which can be used in super-finish polishing, electroplating and medicine. First, initial diamond-carbon substance in form of a suspension or powder is treated with a mixture of aqueous solutions of nitric acid with concentration of 30-40 wt% and hydrofluoric acid with concentration of 20-30 wt% for 72-74%, at room temperature, and then with aqueous hydrochloric acid with concentration of 15-20 wt% for 2.5-3 h, at boiling point of reaction mixture. Method then includes washing off acid.EFFECT: obtaining a diamond-carbon substance in form of spherical particles, containing carbon, hydrogen, nitrogen, oxygen and 0,01 -0,2 wt% of incombustible impurities, having exchange capacity of 0,19 -0,65 mmol/g and high colloidal stability in liquid media.3 cl, 1 dwg, 3 ex

ethod for removing sox from exhaust gases emitted from a steam boiler // 2604746
FIELD: technological processes.SUBSTANCE: invention relates to a method of removing SOx from exhaust gases. Method of removing SOx from exhaust gases emitted from a steam boiler comprises the following steps: (a) heating exhaust gas in front of a catalytic reactor in the flow direction; (b) oxidation of SO2 in exhaust gas to SO3 in the catalytic reactor with at least one transmission of the catalyst acting at temperatures within the range of 350-450 °C; (c) cooling oxidised enriched SO3 of exhaust gas from step (b) to temperature higher than a dew point H2SO4 of exhaust gas; (d) further cooling enriched SO3 of exhaust gas from step (c) in air cooled capacitor, thus, SO3 is condensed in the form of H2SO4 and hot air and purified exhaust gas are produced; (e) removing condensed H2SO4 from the condenser. Exhaust gas temperature at step (c) is controlled by cooling exhaust gas in heat exchanger by heat exchange with water flow at pressure higher than 60 bar, and in which water temperature under pressure at inlet of the heat exchanger is higher than a dew point H2SO4 of gas.EFFECT: invention provides simplified removing SOx from exhaust gas.9 cl, 7 tbl, 3 dwg

ethod of producing artificial fluorspar (caf2) from phosphoric acid production wastes (phosphogypsum) for use in making cement // 2604693
FIELD: chemistry.SUBSTANCE: invention relates to chemical industry. Method involves treatment of phosphogypsum from water-soluble residues of acids by mixing it with water and intensive stirring until dissolution of said residues in water. Phosphogypsum is squeezed from water and obtained water is removed. Such water are mixed with raw material, containing calcium carbonate and used for wet cement production method. Sludge is obtained, containing fluorspar. Purified phosphogypsum is granulated and dried with air. Calcium sulphate dihydrate is obtained, which is used as an additive in ground clinker, obtained in making cement using a wet method.EFFECT: technical result is reduction of power consumption, temperature during cement production, consumed fuel, optimising and simplifying technology for production of cement.7 cl, 4 tbl

Extraction of liquefied natural gas from synthetic gas using mixed refrigerant // 2604632
FIELD: gas industry.SUBSTANCE: invention relates to methods and device for extracting of liquefied natural gas (LNG) stream from hydrocarbon-containing natural gas stream using single closed cycle with mixed refrigerant. Disclosed method initial gas flow is cooled down. Then it is divided in first distillation column to form the first methane-rich lower stream and the first methane-depleted upper stream. Then first methane-rich flow is fractionated in the second distillation column and forming the second methane-rich lower stream and the second methane-depleted upper stream. Further, the second methane-enriched lower stream is extracted.EFFECT: enabling efficient extraction of methane from synthetic gas and other hydrocarbon-containing gases despite the presence of carbon monoxide and hydrogen in these gases.29 cl, 1 dwg, 1 tbl

ethod of increasing oil recovery by chemical treatment // 2604627
FIELD: chemistry.SUBSTANCE: invention relates to chemistry of oil and concerns use of non-organic reagents for oil industry, in particular, for acid and salt treatment of oil-containing formation, represented by heterogeneous permeability carbonate or terrigenous reservoirs. Described is a method of increasing oil recovery by chemical treatment, including pumping into reservoirs salt solutions of sodium and magnesium, wherein said solution is acidified solution of sodium chloride and magnesium chloride in ratio 1:0.10÷0.15 with total content of salts 60-200 g/l, and alternation of pH of pumped solution selected from range 1.0-5.5.EFFECT: technical result is higher oil recovery of formations.1 cl, 2 tbl, 4 ex

ethod for producing sio2 granulate // 2604617
FIELD: chemistry.SUBSTANCE: invention relates to a method of producing SiO2 granules by freezing and re-thawing SiO2 suspension, wherein separation of liquid and sediment composed of agglomerated SiO2 particles occurs in course of thawing, liquid removed is decanted and residual moisture in sediment is removed by a drying step with formation of SiO2 granules.EFFECT: according to invention, alkali metal-free bases in form of nitrogen hydrides are added to suspension to set pH greater than 7.16 cl, 2 dwg

ethod for producing bioactive hydroxyapatite // 2604411
FIELD: medicine.SUBSTANCE: invention relates to medicine. Described is a method for producing bioactive hydroxyapatite, comprising cleaning bones by boiling in calcium chloride solution with concentration of 5-50 wt%. at the temperature of 105-130 °C for 1-2 hours, dissolving bovine bone tissue in hydrochloric acid with concentration of 2-8 wt%. and depositing hydroxyapatite with ammonium hydroxide solution with concentration of 20-25 wt%. while stirring to obtain the pH value of 8-9, pulping the residue after filtration in hot distilled water, repeated filtration and washing precipitate on filter with 2-3 portions of distilled water, then, with ethyl alcohol solution of 60-96 % concentration, drying at temperature of 100-120 °C, calcining at 700-900 °C.EFFECT: result is simplified and shorter time for cleaning of bone tissue of muscles and ligaments and high quality of hydroxyapatite.1 cl, 2 tbl, 2 ex

ethod for production of sodium silicofluoride // 2604236
FIELD: technological processes.SUBSTANCE: invention relates to production of sodium silicofluoride. Method for producing sodium silicofluoride involves reaction of hydrogen fluorosilicic acid and a mixture of sodium-containing compounds, which are taken in an amount of 110-120 % of stoichiometric ratio. Reaction is carried out at a temperature of 0-50 °C during 15-30 minutes to obtain a suspension, product is separated by settling, it is followed by decantation of mother solution, derived slurry is diluted with water, precipitate is filtered and dried. Mixture of sodium-containing compounds used are a mixture of sulphate and sodium carbonate taken at a weight ratio of Na2SO4:Na2CO3, equal to (3.2-3.9):1, in the form of 15-20 % solution. Mixture of sodium-containing compounds can be a sulphate-soda mixture, which is a waste product of alumina production.EFFECT: technical result consists in improvement of quality of the end product.3 cl, 1 tbl, 2 ex

ethod of accumulating hydrogen // 2604228
FIELD: chemistry.SUBSTANCE: invention relates to a method for hydrogen accumulation and can be used in chemical industry for processing of hydrocarbon gases, as well as in transport and hydrogen technologies. Heated stream, containing water vapour and lower alkanes having one to four carbon atoms, is passed through an adiabatic reactor, filled with a nozzle of a catalyst. Then from heated stream hydrogen is extracted by diffusion through sealed metal wall into a capsule, in which hydrogen-absorbing reaction gas is fed.EFFECT: reduced consumption of energy resources, reduced costs for pumping and losses, associated with emission of excess heat into atmosphere, low cost of production and accumulation of hydrogen.12 cl, 1 dwg, 2 tbl, 2 ex
ethod for producing preparation on basis of interaction between trans-dichlorodiammineplatinum (ii) with arabinogalactan // 2604030
FIELD: pharmaceutics.SUBSTANCE: invention relates to production of chemical-pharmaceutical preparations with biological activity. Method of producing preparation is described on basis of interaction of aqueous solution of platinum complex compound with 50 % water solution of arabinogalactan, while heating in water bath, filtration and settling in alcohol, characterized by fact, that trans-dichlorodiammineplatinum (II) is used as complex compound, wherein reaction is carried out, while heating for 30 minutes, in molar ratio of initial substances 1:1.EFFECT: technical result is obtaining medication on basis of interaction between trans-dichlorodiammineplatinum (II) and arabinogalactan with anticancer activity, higher water solubility and low toxicity.1 cl, 2 ex

ethod and apparatus for liquid fuel production and power generation // 2603961
FIELD: energy.SUBSTANCE: invention relates to a method and an apparatus for producing liquid fuel from hydrocarbon gas. Method of producing liquid fuel from hydrocarbon gas and power generation is suggested, wherein the reforming of hydrocarbon gas is performed for producing reforming gas by reaction of steam reforming of hydrocarbon gas; synthesis of gasoline is performed, of dimethyl ether or diesel fuel from reforming gas through methanol; thermal energy heat of reforming gas is removed to obtain saturated water steam with a temperature of 180 °C max, until the use of said reforming gas at the stage of synthesis; overheating of said saturated water steam is performed using a heat source with a temperature of 200 °C min, formed in said method, to produce overheated water steam; and power generation is performed using said overheated water steam, wherein water steam formed due to exothermal reaction during synthesis is used as the heat source for overheating at the stage of overheating.EFFECT: efficient generation of power by using low-temperature wasted heat of the process.2 cl, 1 tbl, 4 dwg

ethod of cleaning quartz sands from iron // 2603934
FIELD: metallurgy.SUBSTANCE: invention relates to hydrometallurgical treatment from iron of quartz sands of various degree of iron content and can be used in mining, metallurgical, glass, ceramic, chemical and electrical industries, in production of construction materials. Proposed method comprises removing iron from quartz sands in blocks at sand deposit or in a vat version with wetting and irrigating sands with a culture solution, containing facultative anaerobic Saccharomyces, Oidium, Bacillus, Bacterium. Achieved degree of purification of sands from iron is 85-99 %.EFFECT: technical result is higher efficiency of removing iron of quartz sands of various degree of iron content using a simple technique in environmentally safe conditions. 8 cl, 1 tbl, 2 ex
 
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