Selective separation nitroso-containing compounds

FIELD: chemistry.

SUBSTANCE: balls consist of non-acidic absorbent resin monomer and a crosslinking agent containing polar functional groups, one of which is hydrophilic, and the second - hydrophobic. The beads prepared by suspension polymerization of the monomer and crosslinking agent in an aqueous medium in the presence of a steric stabiliser and a blowing agent, and isolation of the polymerized material from the reaction mixture. The beads can be prepared by suspension polymerization in the presence of nitrosamine structural analogue specific for tobacco subjected to obtain molecular imprinting polymer associated with nitrosamine structural analogue and removing said structural analogue of the balls. The beads can be used, for example, for isolation and analysis of biological fluids nitrosamines and processing and manufacture of tobacco products and tobacco materials.

EFFECT: providing a polymer in bead form suitable for more efficient removal of one or more nitroso-containing compounds of material containing nitroso-containing compounds compared with the polymer being in the form of shredded particles.

55 cl, 18 dwg, 13 tbl, 16 ex

 



 

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: process engineering.

SUBSTANCE: invention relates to production of sorbents for chromatographic separation of fullerenes. Sandwiched nanotubes are subjected to heat treatment at 800-1000C 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: 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: 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 130C and burning at 1000C are carried out. Obtained product is mixed with solution of sodium chloride, evaporated on water bath until loose sample is obtained, dried at 120C and incinerated at 900C.

EFFECT: increase of sorbent selectivity.

3 tbl, 3 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 field of recycling of radioactive solutions. Composition of extraction chromatographic material for selective separation of U(VI), Th(IV), Np(IV) and Pu(IV) from nitric acid solutions contains three components. As complexants composition contains 33% of methyltrioctylammonium nitrate (MTOAN) and 1-16% of phosphoryl podand. As matrix composition contains macroporous spherical granulated copolymer of styrene with divinylbenzene. As phosphoryl podand used are derivatives of 1,5-bis[2-(oxyethoxyphosphoryl)-4-(alkyl)phenoxy-3-oxapentane of general formula I , where Alk is alkyl C1-C12.

EFFECT: extension of spectrum of highly efficient selective sorbents for extraction of U(VI), Th(IV), Np(IV) and Pu(IV) from nitric acid solutions.

8 dwg

FIELD: chemistry.

SUBSTANCE: invention relates to production of silicate materials. Disclosed is a method of producing inverted-phase hydrophobisated polysilicate sorbents, which includes reaction of a hydrophilic silicate component with an amphiphilic silicate component in an aqueous medium. Co-condensation of said components is carried out with molar ratio of water to the sum of the silicate components of 124-250. An acidic and/or alkaline component is also added to the reaction mixture until polysilicate hydrogel forms. The obtained sorbent is intended for use as a filter medium and as an enterosorbent.

EFFECT: obtaining three-dimensional hydrogel of polysilicic acid containing hydrophilic and hydrophobic groups in an aqueous medium.

17 cl, 3 tbl, 1 dwg, 16 ex

FIELD: chemistry.

SUBSTANCE: group of inventions relates to the field of chromatography. Claimed is a method of obtaining a filling agent. The method includes the first stage of interaction of an inorganic particle, which has a hydroxyl group, with a silane binding agent, having an alkenyl group with the carbon number from 2 or more and 8 or lower and/or an alkynyl group with the carbon number from 2 or more and 7 or lower, and the second stage of interaction of the inorganic particle, which reacted with the silane binding agent, with the compound, represented by the general formula (1): . R1 represents an alkyl group with the carbon number from 4 or more and 50 or lower or an aryl group with the carbon number from 6 or more and 30 or lower, and each of R2 and R3 represents independently a hydrogen atom, chlorine or an alkyl group with the carbon number from 1 or more and 4 or lower. The first stage additionally includes interaction of the inorganic particle, which reacted with the said silane binding agent, with the silane agent, which does not have any alkenyl or alkynyl group.

EFFECT: group of inventions ensures obtaining the filling agent for a column, in which a low degree of widening of the main substance peak is ensured.

4 cl, 3 dwg, 3 ex

FIELD: chemistry.

SUBSTANCE: sorbents are obtained by interaction of ferrous sulphate and calcium hydroxide in a water medium, which contains fibrillated cellulose fibres. Particles of iron hydroxide and calcium sulphate formed as a result of the interaction are immobilised on the fibres with formation of a sorbent.

EFFECT: increased content of an active phase in the sorbent.

2 cl, 4 ex

FIELD: medicine.

SUBSTANCE: invention refers to biology and medicine, and can be used in clinical practice for therapy of diseases related to lipid storage disease and disorders of lipoprotein metabolism. What is presented is a sorbent for removal lipoproteins (LDLP) from human plasma and blood, which contains a non-woven microfiber matrix of polypropylene and polyacrylic acid covalently bond to a matrix surface. The sorbent is produced by photo-induced graft polymerisation of acrylic acid on the surface of the sorbent matrix. The sorbent matrix is processed with a photoinitiator solution in a volatile solvent and air-dried. The sorbent matrix is then immersed into an aqueous solution of acrylic acid, removed from a solution of acrylic acid, laid on a flat substrate, coated with an ultraviolet-transparent plate from above and exposed to ultraviolet through this plate. The produced sorbent has the high sorptive capacity and LDLP selectivity.

EFFECT: method is easy to implement and cost-effective.

2 cl, 1 tbl, 1 ex

FIELD: chemistry.

SUBSTANCE: invention relates to the technology of producing sorbents used in environmental protection for localising collection and recycling oil and oil products from contaminated water and soil surfaces. A foamed finely dispersed aqueous emulsion contains 25-35 pts.wt of low-toxicity urea formaldehyde resin (KFMT-15). The emulsion is mixed in a special mixing chamber with a solution which is injected into the chamber, said solution containing 15-20 pts.vol of a 9-15% mineral acid (orthophosphoric acid) and 3.5-5.0 pts.vol of a surfactant (alkyl benzene sulphonic acid), heated to 45-55C. The hardened mass is crushed and dried at 65-70C and then treated with a suspension of oil-oxidising microflora prepared in amount of 108-109 cells/ml and potassium humate content of 0.01-0.1%.

EFFECT: obtaining a sorbent with high oil capacity, low content of formaldehyde and a long shelf life, contains oil-oxidising microflora and potassium humate, does not require removal from the application site and in one season is capable of reducing the oil contamination level to a level which does not require special cleaning processes for an initially high contamination level.

2 cl, 2 ex, 1 tbl

FIELD: biotechnology.

SUBSTANCE: biohybrid composite material for sorption and degradation of crude oil and petroleum products is proposed. The material is a thermoplastic polymer with fibre-forming properties - acrylonitrile copolymer with methyl acrylate. It comprises incorporated phosphorus-containing cationites and/or nitrogen-containing anionites, the cell walls of aquatic plants of the family Lemnaceae (Lemnaceae) and immobilized cells of bacteria-oil destructors.

EFFECT: composite material has high adsorption capacity and a higher degree of biodegradation of petroleum hydrocarbons.

2 ex

FIELD: chemistry.

SUBSTANCE: invention relates to a process of production of magnetic sorbents. The sorbent comprises humic acids as a polymeric binder and a magnetic filler comprising magnetite. The size of magnetite particles is 7-30 nm. The magnetite:humic acid ratio is from 1:4 to 4:1. The efficiency of aquatic environment decontamination by introducing the sorbent depends on the nature of contaminants and amounts to 97-100%.

EFFECT: product possesses magnetic properties and high sorption capacity.

2 cl, 2 ex

FIELD: chemistry.

SUBSTANCE: invention relates to analytical chemistry, chemical engineering and environmental science. Disclosed is a method for group extraction of copper, zinc and cadmium, which includes sorption concentration of metals on amberlite IRA-400, modified with 2,7-bis-azo-derivative of chromotropic acid. The amberlite is modified with 3-[(4-antipyrine)azo]-6-[(2-carboxyphenyl)azo]chromotropic acid. After concentration, metals are desorbed with a 0.05 solution of a disodium salt of ethylendiaminetetraacetic acid at pH 10 and ratio of the volume of the solution to the mass of the sorbent of 5000:1.

EFFECT: invention enables to obtain analytical concentrations in tests for metals in field conditions.

1 dwg, 3 tbl

FIELD: process engineering.

SUBSTANCE: invention relates to production of sorbents for chromatographic separation of fullerenes. Sandwiched nanotubes are subjected to heat treatment at 800-1000C 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: 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: method includes impregnation of substrate with to solution be polymerised and polymerisation of solution on substrate by heating. As substrate used are heat-resistant microfibrous organic polymer materials based on heterocyclic oxydiazole compounds with diameter of fibres from 5 to 20 mcm. Impregnation is performed with solution to be polymerised, prepared by mixing acrylic acid and water solution of alkali metal hydroxide with concentration 10-25 wt %. Ratio of volume of solution to be polymerised and substrate volume in impregnation constitutes 2:1. Polymerisation is realised at temperature 90-110C.

EFFECT: invention makes it possible to simplify technological process, eliminate application of toxic organic solvents, increase sorption capacity and improve kinetics of water steam sorption on sorbent.

3 cl, 1 tbl, 5 ex

FIELD: chemistry.

SUBSTANCE: invention relates to chemistry of highly molecular compounds, nanotechnologies and photochemistry and deals with elaboration of photo-solidificated composition for obtaining polymer material, possessing three-dimensional nanoporous structure with hydrophobic surface of pores, single-stage method of its obtaining and porous polymer material with selective sorptive properties and single-stage formation on its basis of water-separating filtering elements with specified geometry and required mechanical strength, applied in devices for purification of organic liquids, mainly hydrocarbon fuels, oils, oil products, from emulsified water and mechanical admixtures. Photopolymerising composition contains oligoetheracrylate, photoinitiator, as photoinitiator, used is ortho-quinone with condensed aromatic system, functionalising monomer of vinyl series, solidified by radical mechanism, less reactionable in comparison with oligoetheracrylate and forming hydrophobic polymer and non-polymerisationable component, dissolving composition monomers and limitedly compatible with final polymer. On the basis of composition developed is method of single-stage obtaining of polymer nanoporous material with functionalised surface of pores, as well as methods of single-stage obtaining of products - water-separating filtering elements with specified geometry and increased mechanical strength. Nanoporous polymer material, selective sorptive properties of which have been experimentally confirmed, is obtained. Selectively sorptive properties of filtering elements have been experimentally proved on the example of benzene purification from water.

EFFECT: nanoporous polymer water-separating filtering elements with specified geometry and increased mechanical strength have been obtained by single-stage method for the first time.

12 cl, 8 dwg, 5 ex

FIELD: chemistry.

SUBSTANCE: claimed is method of obtaining polystyrene-based sorbent for extraction of boron from water solutions. As initial raw material linear polystyrene is used. Polystyrene is processed with fuming nitric acid, then with water-alcohol solution of tin (II) chloride. After that, obtained polyaminostyrene is subjected to interaction with glycidol under impact of ultrasound. Target product is extracted by water-soluble alcohols or ketones and air-dried.

EFFECT: increased output of suitable.

1 tbl, 4 ex

FIELD: chemistry.

SUBSTANCE: adsorption is carried out in a system with a simulated moving adsorbent bed. The method includes washing an intermediate transfer line between a first intermediate transfer line and an extract stream transfer line outside an adsorptive separation chamber. Residual fluid medium is removed from the intermediate transfer line as a result of said washing. The method may include directing the residual fluid medium washed from the intermediate transfer line into a recycle stream for feeding the residual fluid medium into the adsorptive separation chamber.

EFFECT: high purity of para-xylene separated from a stream of C8 aromatic compounds in the disclosed adsorption system.

10 cl, 13 dwg

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