Method for obtaining porous magnetic sorbent

FIELD: chemistry.

SUBSTANCE: method for obtaining a porous magnetic sorbent of petroleum products is proposed. According to the invention, the synthesis of calcium monosilicate of the xonotlite structure is carried out by the interaction in the solution of calcium chloride and sodium silicate in the presence of a silane-siloxane microemulsion with obtaining hydrophobizated hydrogel. A previously obtained magnetic phase of iron oxides, represented by wuestite and maghemite is introduced into the volume of hydrogel. The said magnetic phase is precipitated with an excess of ammonium hydroxide from a mixture of solutions of salts of trivalent and ferrous iron at a ratio of Fe3+ /Fe2+, equal to 2:1. The resulting mixture is maintained until a stable hydrated precipitate is formed in the form of gel, washed and dried.

EFFECT: invention provides an improvement in the operating properties of the sorbent.

3 cl

 



 

Same patents:

FIELD: chemistry.

SUBSTANCE: invention relates to nickel complex of 5,10,15,20-tetrakis [3',5'-di(2"-methylbutyloxy)phenyl]-porphin of formula

EFFECT: invention makes it possible to obtain nickel complex, demonstrating property of stationary phase for gas chromatography.

1 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to field of analytic chemistry. Carrier is modified with organosilicon compound, containing -SH or -NH2 group, is processed with colloid gold solution. After that, sulphur-containing organic compound is covalently fixed on the surface of gold nanoparticles.

EFFECT: claimed is method of obtaining separation material, containing silicon dioxide-based carrier and gold nanoparticles.

3 cl, 6 dwg

FIELD: chemistry.

SUBSTANCE: claimed invention relates to a method of obtaining a catalyst for the selective catalytic reduction of NOx in a flue gas, containing an alkali metal, with the application of ammonia as the reducing agent, with the catalyst containing a surface with catalytically active centres of Bronsted or Lewis acids, with the surface being, at least, partially covered with a coating, containing, at least, one metal oxide, and the said method includes the supply of a carrier, impregnation of the carrier with the first water solution, containing a vanadium component, drying and calcination of the impregnated carrier, covering the impregnated carrier with the second water suspension, containing, at least, one oxide of a basic metal, representing MgO, and drying and calcination of the coated carrier for the second time.

EFFECT: obtaining the catalyst with an improved resistance to poisoning with alkali metals.

7 cl, 6 dwg, 4 ex

FIELD: oil and gas industry.

SUBSTANCE: contaminated surface is treated with a sorbent. The sorbent saturated with oil is collected and transported to be utilised. Finished products from ash and foam concrete of autoclave hardening are used as a sorbent.

EFFECT: reducing sorbent consumption, increasing its retaining ability and a possibility of its being used at negative ambient temperatures.

1 tbl

FIELD: process engineering.

SUBSTANCE: invention relates to production of sorbents for chromatographic separation of fullerenes. Sandwiched nanotubes are subjected to heat treatment at 800-1000°C and mixed with disperse Teflon. Said step are performed in the medium of nitrogen or inert gas.

EFFECT: simplified production of efficient sorbent.

2 dwg, 2 ex

FIELD: chemistry.

SUBSTANCE: invention relates to reagents intended for decontaminating soil contaminated with hydrocarbons, and can be used for decontamination and reclamation of oil-contaminated soil and oil extraction and processing wastes. The reagent for decontaminating oil contaminated with hydrocarbons contains unslaked lime and paraffins as a water repellent.

EFFECT: invention provides high degree of decontamination and improved hydrophobic properties of the decontamination products.

1 tbl

FIELD: chemistry.

SUBSTANCE: claimed is method of obtaining sorbent for gaschromographic separation of aromatic polycyclic hydrocarbons. Calcium aluminate is obtained by mixing in solution calcium nitrate, aluminium nitrate and crystalline citric acid at molar ratio of components 1:2:3. After mixing drying at 130°C and burning at 1000°C are carried out. Obtained product is mixed with solution of sodium chloride, evaporated on water bath until loose sample is obtained, dried at 120°C and incinerated at 900°C.

EFFECT: increase of sorbent selectivity.

3 tbl, 3 ex

FIELD: chemistry.

SUBSTANCE: invention relates to reagents, intended for the neutralisation of wastes, polluted with hydrocarbons, and can be applied for the neutralisation and utilisation of wastes from gas-oil extraction and processing. A reagent for the neutralisation of wastes, polluted with hydrocarbons, contains quicklime and oil wastes as a hydrophobisator.

EFFECT: increase of the neutralisation efficiency and quality of end products of neutralisation.

2 tbl, 2 ex

FIELD: chemistry.

SUBSTANCE: invention relates to the field of materials science and analytical chemistry. A nanohybrid functional separation material contains gold nanoparticles covalently fixed on a carrier and covalently fixed sulphur-containing organic ligands on the surface of gold nanoparticles.

EFFECT: invention provides an increase of the separation material efficiency.

4 cl, 6 dwg, 4 ex

FIELD: chemistry.

SUBSTANCE: invention relates to method of obtaining thin-layer chiral plates for planar chromatography of stereoisomers and their racemic mixtures, which includes non-covalent binding of glycopeptides antibiotic eremomycin with silica adsorbent with silicagel binding by method of impregnation in alkaline water solution with pH 8.0÷10.0 at room temperature in one stage.

EFFECT: increase of method efficiency.

2 cl, 3 tbl, 5 ex

FIELD: chemistry.

SUBSTANCE: invention can be used in industry at the stage of fine or additional purification of water from traces of heavy metal ions, in the purification of vapour condensate in boiler houses and TPP plants in the creation of closed technological water circulation. To realise the method of ion-exchange water purification sewage waters and technological solutions are passed through a sorbent, containing hydrazide groups. as the sorbent used is activated carbon, preliminarily processed with a gas mixture of ammonia and hydrazine, taken in volume ratios of 1:2-2.5, at a temperature of 350-450°C. The method provides the removal of ions of metals with a variable valence: Cu2+, Zn2+, Ni2+, Cr3+, Fe3+, as well as ions of metals: Bi3+, Zr4+, Sr2+, Co2+ from water, with the preservation by the sorbent of the sorption activity in a wide range of the water solution pH values.

EFFECT: purification of water from traces of heavy metal ions.

1 tbl, 1 ex

FIELD: medicine.

SUBSTANCE: invention refers to a moulded sorbent with the antibacterial properties for treating endometritis, representing nanodispersed mesoporous carbon having a specific adsorption surface of no more than 50 m2/g and a crushing strength of not less than 20 kg/cm2, containing polyvinylpyrrolidone in an amount of not less than 5.0%, characterised by the fact that it is presented in the form of cylinders 2-4mm in diameter, 15-25mm long with one inner circular passage, to a method of treating it, as well as to a method of treating endometritis.

EFFECT: higher clinical effectiveness.

3 cl, 10 ex, 2 tbl

FIELD: chemistry.

SUBSTANCE: inert inorganic substrate is soaked with solution of lithium aluminium hydride in diethyl ether. Ether is removed by vacuuming and pyrolysis of lithium aluminium hydride, applied on substrate, is realised at temperature 100-500°C in vacuum.

EFFECT: obtaining sorbent, effective for purification of inert gases and reducing gases from admixtures of Lewis acids, hydrocarbons, oxygen or volatile oxides.

10 ex

FIELD: chemistry.

SUBSTANCE: claimed invention relates to application of hydrogen form of palladium-doped zeolite ZSM-5 for absorption of volatile organic compounds (VOC), formed from organic substance. Ratio Si:Al in zeolite ZSM-5 is lower or equals 100:1. Palladium-doped zeolite ZSM-5 is applied in the environment, including less than 10 volume % of oxygen.

EFFECT: improvement of absorption.

25 cl, 1 dwg, 1 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to analytical gas chromatography, particularly to methods of producing sorbents for analysing organic substances, including environmental pollutants. Disclosed is a method of producing a sorbent for gas chromatography, involving deposition of a binary composition, consisting of bis-(phenyl-arsinic)acid and β,β'-oxydipropionitrile, onto a solid Chromaton carrier.

EFFECT: invention enables to obtain a sorbent having high selectivity of separation of organic substances.

1 tbl

FIELD: chemistry.

SUBSTANCE: invention can be used to improve membrane and sorption techniques, in water treatment, in techniques for recycling ions of heavy metals from aqueous solutions and waste water. The method is realised by contacting aqueous solutions for 1-20 minutes with cellulose-based polymer sorbents which are modified with microwave radiation with power of 300 W and frequency of 2.45 GHz, with solution/sorbent ratio of 50-200. The sorbents are modified by pre-immersion in aqueous caprolactam solution or caprolactam distillation residue with concentration of 2-20 g/l with modulus of 15-50, followed by pressing and microwave exposure for 1-5 minutes at temperature of 150-200°C. The modified sorbents are brought into contact with aqueous solutions at solution pH 3-7.

EFFECT: method increases degree of extraction of heavy metal ions from weakly acidic solution with pH below 5 by about 20%, while maintaining a high degree of extraction of heavy metal ions from neutral aqueous solutions, and also increases sorbent stability when stored on open air to one year and reduces the number of steps when modifying sorbents.

1 tbl, 5 ex

FIELD: process engineering.

SUBSTANCE: invention relates to synthesis of inorganic sorbents to be used in water treatment, radio-chemistry and processing if liquid radioactive wastes. Proposed method comprises processing of porous carrier selected from glass powder, active coal or silica gel by water suspension of sorption active insoluble compound selected from the group including nickel ferrocyanide, aluminium hydroxide and copper sulphide at ultrasound radiation of 50-200 W and 22-60 kHz and at temperature of 70-90°C.

EFFECT: mechanically active inorganic sorbents with high content of active substance.

3 tbl, 3 ex

FIELD: chemistry.

SUBSTANCE: invention relates to techniques of producing sorbents for extracting silver from waste water and process solutions. The sorbent is obtained using a dispersion of fibrillated cellulose fibres as lead sulphide carriers. Lead sulphide is precipitated with sodium sulphide in an aqueous dispersion which contains lead acetate or nitrate and said fibres. A sorbent containing 50-300 pts.wt lead sulphide per 100 pts.wt fibre is obtained.

EFFECT: invention enables to obtain a sorbent with capacity of 300-675 mg silver per 1 g sorbent.

3 ex

FIELD: chemistry.

SUBSTANCE: invention relates to a method and apparatus for producing a sorbent, mainly for removing arsenic from drinking water. The method involves the following steps: saturating a water-absorbent wettable organic carrier material with an aqueous solution of a water-soluble iron salt, filtration thereof and drying to constant weight, saturating the carrier material with a stoichiometric amount of oxalic acid and/or a water-soluble salt of oxalic acid, followed by filtration thereof and drying to constant weight, with conversion of iron ions to a water-insoluble iron oxalate, converting the saturated carrier material to activated carbon by anaerobic heating, subjecting the saturated carrier material to anaerobic cooling with decomposition of iron oxalate to iron and carbon dioxide, pre-oxidation of iron particles of the activated carbon with a water-soluble peroxide compound, filtering the activated carbon and washing until complete removal of salt therefrom, followed by filtration and drying thereof once more, converting iron hydroxide formed on the surface of iron particles to magnetite by anaerobic heating of the activated carbon, followed by anaerobic cooling of the sorbent to room temperature.

EFFECT: invention provides efficient and cheap removal of arsenic.

20 cl, 1 dwg, 1 ex

FIELD: process engineering.

SUBSTANCE: invention relates to production of sorption and filtration materials for cleaning water from, mainly, manganese and iron. For production of sorbent, basalt fibers are used as a carrier. Said fibers are premixed in aqueous medium at mixing to sixes of 1 to 25 mm and chemically activated by inorganic acid. Said carrier is subjected to chemical treatment by bivalent manganese salt of concentration of 0.5 to 2%, medium pH is increased to 8 to 12 and hydrogen peroxide of concentration varying from 0.15 to 2% is added. Then, treated material is dried at 120-200°C and thermally treated at 250-350°C.

EFFECT: longer life, higher sorption capacity.

FIELD: chemistry.

SUBSTANCE: material comprises a textile cellulose-containing base, a photocatalytic layer which is a complex of silicon dioxide, modified with aluminate ions, and titanium dioxide with an anatase modification, and an adsorbent layer of aluminium oxide with a boehmite structure, which is located between the photocatalytic layer and the textile base.

EFFECT: invention provides high adsorption capacity for polar and nonpolar chemical compounds and good photocatalytic and antibacterial properties of the material.

4 cl, 2 dwg, 4 tbl

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