The method of producing resin
(57) Abstract:Usage: synthesis of anion exchange resin for wastewater treatment, in particular for the extraction of chromium (VI) from solutions. The inventive amination of mono - or polyamines klimatisierung copolymers of styrene with divinylbenzene. Additional treatment with acetic anhydride in the liquid or vapor phase at 25 - 160°C for 5 to 30 minutes table 2. The invention relates to the field of synthesis of ion-exchange materials used for wastewater treatment and in particular to the extraction of chromium (VI) from solutions.Known methods of synthesis of anion exchange resin for adsorption of anions of chromium (VI) by chlorotoluene copolymers of styrene and divinylbenzene (DVB) and then aminating ammonia, mono-, di - and tri - alkylamines followed, as well as di-, tri - and polyamines.A disadvantage of the known methods of modifying resins for the extraction of chromium (VI) from solutions is that they are characterized by a low degree of elution during desorption of chromium (VI) from sorbent, which does not exceed 60% per cycle.Removing anionic forms of chromium (VI) from strongly acidic solutions (N2SO4) accompanied by competing sorption of sulfate ions, n is the anion Cr (VI) in sulfuric acid environments.The aim of the present invention is to increase the degree of desorption of chromium (VI) ion.This goal is achieved by a method of processing klimatisierung copolymer of styrene and mono - and polyamines, the distinguishing feature of which is that the anion exchange resin further treated with acetic anhydride. The synthesis is carried out at a temperature of 25-130aboutWith liquid or steam environment (100-130aboutC) for 5-30 minutesThe present invention is illustrated by the following examples.P R I m e R 1. 5.0 g klimatisierung and laminirovannogo copolymer of styrene with DVB (ion-exchange capacity of the anion of chromium (VI) is 1.80 mmol/g sorption from solution with a concentration of chromium 0.2 g/l; pH of sorption of 2,2; the degree of desorption 51%) are placed in a flask and pour 250 ml of acetic anhydride and incubated for 5 min at a constant temperature of 130aboutWith the sucked liquid phase, washed with 1000 ml of 3% NaOH solution and then washed the resin with water until neutral and dried in an oven for 24 h to constant weight. Get the polymer, the degree of transformation in the reaction of N-acylation is 0.95 (ion-exchange capacity of chromium (VI) 1.5 mmol/g sorption ish">P R I m e R s 2-5. Conditions of implementation and the characteristics of the modified ion exchanger in the table. The METHOD of producing RESIN by processing klimatisierung copolymers of styrene with divinylbenzene mono - and polyamines, characterized in that the anion exchange resin optionally acelerou acetic anhydride in the liquid or vapor phase at 25 - 130oC for 5 to 30 minutes
-CH-CH2--CHwhere K = 34,1 to 58.6, L = 30,7 - 45,5, m = 2,1 - 5,1, n = 1,9 - 4,6 mol
-CH-CH2--CHwhere K = 34,1 to 58.6, L = 30,7 - 45,5, m = 2,1 - 5,1, n = 1,9 - 4,6 mol
SUBSTANCE: invention discloses polymer particles with size between 60 nm and 1000 nm and containing a polymer which contains a hydrophobic backbone chain formed by at least one segment which absorbs near-infrared radiation, bonded with chloroform which absorbs near-infrared radiation, having an absorption peak between 700 and 1100 nm; and at least one segment which is transparent for near-infrared radiation. The invention also discloses a method of producing said particles, a coating composition containing said polymer particles and a reactive iodonium oligomer, as well as a negative lithographic offset printing plate which contains a substrate, a hydrophilic bottom layer and a laser-developed top layer, where the laser-developed top layer contains said polymer particles.
EFFECT: disclosed particles enable to obtain coatings which ensure sufficient runability and machine developability of negative lithographic offset printing plates.
32 cl, 35 dwg, 4 tbl, 23 ex
SUBSTANCE: invention describes a copolymer containing monomer units A having a cyano-containing side group, monomer units B having an alkyl and an aryl film-forming side group, monomer units C having a side chain containing poly(ethylene glycol), poly(propylene glycol) and/or statistical poly(ethylene glycol-propylene glycol) and optionally monomer units D having at least one functional group capable of undergoing a crosslinking reaction via cationic polymerisation.
EFFECT: copolymer is further used to produce polymer particles for use in radiation-sensitive coating compositions for negative radiation-sensitive lithographic printing plates.
11 cl, 6 dwg, 2 tbl, 26 ex
FIELD: chemical technology, resins.
SUBSTANCE: invention relates to a method for preparing polyhalide strong-basic anion-exchange resins of gel and macroporous structure designated for disinfection of water in closed ecological objects, domestic drinking water and water from non-checked sources. Polyhalide anion-exchange resins is prepared from strong-basic quaternary ammonium anion-exchange resins in chloride form by their iodination with J2 solution in KJ at stirring, thermostatic control and washing out. Iodination is carried out with triiodide solution on conditioned strong-basic anion-exchange resins in chloride form in the content of strong-basic groups 80%, not less, in the mole ratio anion-exchange resin : triiodide = 1.0:(1.1-1.5). Ready product is kept at 20-55°C additionally. Invention provides preparing polyhalide anion-exchange resins characterizing by high resource in water disinfection and in simultaneous reducing iodine release in disinfecting water in retention of high disinfecting indices.
EFFECT: improved preparing method.
1 tbl, 8 ex
SUBSTANCE: method for preparation of low-basic anionites by suspension copolymerisation of acrylonitrile, methylmethacrylate in amount of З-5 wt.%, content of technical grade divinylbenzene being 9-15 wt.% and concentration thereof being 50-60%, in the presence of benzoperoxide in amount of 3.0 wt.% and blowing agent (alkylbenzine, aviation kerosene, decane) in amount of 40 vol.% as regards to monomer volume in suspension media, which consists of water, 25% of sodium chloride or ammonium chloride and 1.5-2.0% of potato starch, when heated at 50°С for 1 hour, at 61-65°С for 4 hours, at 70°С for 2 hours, at 80°С for 1 hour, followed by amination with diethylenetriamine at 130-145°С for 10 hours in the presence of 1.0-1.5% of element sulphur used as a catalyst.
EFFECT: provides for high osmotic stability and high resistance to organic poisoning.
1 cl, 9 ex
SUBSTANCE: invention pertains to the field of obtaining subacid carboxylic cation exchange resins with a macro-porous structure. The engineering problem is the obtaining of a subacid carboxylic cation exchange resin with high values of capacity and strength characteristics: full exchange capacity of not less than 2.5 mg Eq/cm3, dynamic exchange capacity of not less than 1600 g Eq/m, and osmotic stability of not less than 98%. High capacity and strength characteristics can be achieved due to the structure of the polymer matrix and conditions for obtaining it. A method is proposed for obtaining the subacid carboxylic cation exchange resin though radical suspension copolymerisation of acrylonitrile and methyl methacrylate with divinyl benzene as a cross-agent, taken in percentage mass quantities of 9-12 % at concentration of 50-60 %, in the suspension medium in the presence of sponging agents (alkyl benzene, aviation kerosene) in percentage volume quantities of 40 % of the volume of monomers during heating and sustaining at 50°C temperature for 2 hours, 61°C for 2 hours, 65°C for 3 hours, 70°C for 2 hours, with subsequent basic hydrolysis of the nitrile group using a 25 % water solution of caustic sodium with gradual increase in temperature from 50°C to 110°C and sustenance at temperature of 110°C for a period of 10 hours.
EFFECT: obtaining of a subacid carboxylic cation exchange resin with high values of capacity and strength characteristics.
1 cl, 5 ex
SUBSTANCE: present invention relates to sorption hydrometallurgy of uranium. Described is a pyridine ionite based on a copolymer of styrene and divinylbenzene for sorbing uranium from solutions and pulp, distinguished by that the initial polymer matrix of the ionite additionally contains methacrylic acid in amount of 3.0-6.0 wt %.
EFFECT: obtaining an ionite with improved desorption characteristics; improved cost-performance ratio of the sorption-desorption process of extracting uranium from a solution.
2 cl, 3 tbl, 2 ex
SUBSTANCE: proposed is a method for synthesis of porous weakly-basic anionites through copolymerisation of acrylonitrile and divinylbenzene in the presence of blowing agents and a benzoperoxide polymerisation initiator, with subsequent aminolysis of the copolymers with polyamines with an elementa-y sulphur catalyst, where acrylonitrile and divinylbenzene are copolymerised at pressure 1.2-2.7 atm with addition into the polymerisation mixture of unsaturated compounds selected from a group comprising acrylic esters, styrene, methyl- and ethylstyrene, with content of acrylonitrile not less than 67.5 mol %, divinybenzene 8-20 % and molar ratio of acrylonitrile to the rest of the unsaturated components not greater than 2.5:1, and aminolysis is carried out with triethylene tetramine and diethylene triamine in the presence of 0.1-0.5 % elementary sulphur.
EFFECT: improved method.
1 cl, 4 ex, 1 tbl
SUBSTANCE: invention relates to methods of obtaining weakly acidic carboxylic cationites used in sorption processes in hydrometallurgy, biotechnology and heat engineering. A method is described for obtaining carboxylic cationites through suspension copolymerisation of acrylonitrile, divinylbenzene and methacrylic acid in the presence of a blowing agent and a polymerisation initiator - benzoyl peroxide in a medium of a water-salt solution of potato starch containing 20% sodium or ammonium chloride, or in a medium of an aqueous solution of cellulose, with subsequent alkaline hydrolysis of nitrile groups of the copolymer, with 71-76.5% acrylonitrile, 8-12% divinylbenzene, 5-10% methacrylic acid content in the polymerisation mixture and using a blowing agent in form of butylacetate in amount of 15-40% of the volume of the mixture of monomers.
EFFECT: design of an efficient method of obtaining weakly acidic carboxylic cationites.
4 ex, 1 tbl
SUBSTANCE: described is a deodorant particle having BET specific surface area of 10 m2/g or more, which is obtained via copolymerisation of monomers which include a cross-linking vinyl monomer and a vinyl monomer which bears the heteroaromatic ring. The invention also describes a method of producing the deodorant particle described above, which involves a step for copolymerisation of monomers which include a cross-linking vinyl monomer, and a vinyl monomer which bears the heteroaromatic ring, emulsion polymerisation of oil-in-water or precipitation polymerisation using an organic solvent whose solubility parameters differ from those of said monomers on absolute value by 0-2.0. Described is a deodorant fibre product containing said deodorant particle. The invention also describes a soaking article containing said deodorant particle.
EFFECT: obtaining deodorant particles which have good deodorising capacity and efficiently remove bad smells.
11 cl, 5 dwg, 10 tbl, 38 ex
SUBSTANCE: present invention relates to a mixed basicity anionite which can be used to extract noble metals from hydrometallurgical cyanide solutions and pulp. Described is a mixed basicity anionite for sorption of noble metals from cyanide solutions and pulp, containing benzyl dimethylamine and dibenzyl dimethylamine functional groups, obtained by treating a low-cross-linked porous copolymer of styrene, divinyl benzene and ethyl styrene with a batched mixture of monomers of similar composition, also containing a polymerisation initiator and a blowing agent, followed by secondary polymerisation to form an additional cross-linked polymer in amount of 30-75%, successive chlorination and amination thereof with dimethylamine to introduce benzyl dimethylamine and dibenzyl dimethylammonium functional groups.
EFFECT: improved cost/performance ratio of sorption extraction of noble metals from cyanide solutions and pulp.
1 cl, 3 tbl, 3 ex
SUBSTANCE: claimed invention relates to branched polymers and methods of their obtaining. Described is a branched polymer, consisting of 50-99.8 wt % (of the polymer weight) of units, formed by styrene and/or α-substituted alkyl styrenes - α-methyl-styrene, α-isopropyl-styrene and/or alkyl styrenes with substitution in a benzene ring - 4-methyl-styrene, 3-methyl-styrene, 2,5-dimethyl-styrene, p-tert-butyl-styrene, o-ethyl-styrene, m-ethyl-styrene, p-ethyl-styrene and/or halogen-substituted styrenes - 4-chloro-styrene, 4-bromo-styrene, 0.2-50 wt % of units, formed by isomers of divinylbenzene and/or its substituted analogues - o-divinylbenzene, m-divinylbenzene, p-divinylbenzene, and 0.0001-3.52 wt % of peroxide and/or hydroperoxide groups, with a weight part in it of oxygen atoms, present in the composition of functional groups, formed as a result of a radical-chain monomer or a polymer oxidation in the presence of oxygen - carbonyl, carboxyl, ketone, hydroxyl, peroxide, hydroperoxide, ether, ester groups, not more than 21.0 wt %. Also described are versions of methods of obtaining the said branched polymer, characterised by the fact that the methods are realised in the presence of dissolved in a liquid phase oxygen, concentration of which in the liquid phase is supported at the level not higher than 1.0×10-2 mol/l.
EFFECT: obtaining branched polymers with low content of peroxide groups and high molecular weight, which increases their thermal stability and prevents from changing physical-chemical characteristics in the process of storage and exploitation.
6 cl, 8 dwg, 2 tbl, 5 ex
SUBSTANCE: invention relates to a method of producing a sorbent for selective extraction of scandium ions. The method includes a step for acylation of a styrene and divinylbenzene copolymer with acetylchloride in dichloroethane solution in the presence of anhydrous aluminium chloride, washing and drying, a step for phosphorylation of the acylation product with phosphorus trichloride, a step for hydrolysis with ice water and final washing of the end product. The starting copolymer used is a macroporous copolymer of styrene and divinylbenzene. Acylation is carried out at the boiling point of the acetyl chloride solution. Phosphorylation is carried out by first holding the reaction mass at room temperature and then adding glacial acetic acid and further holding the reaction mass while stirring.
EFFECT: obtaining a complexing sorbent which is highly selective to scandium and improved process.
4 cl, 1 tbl, 2 ex
SUBSTANCE: invention relates to a method of producing polyalkenyl acylating agents. The method involves reaction of reactive polyalkene whose number-average molecular weight Mn ranges from 500 to 5000, containing terminal vinylidene groups in an amount greater than or equal to 30%, with enofil at temperature higher than 180°C. The reaction takes place while heating for a period of time which is sufficient for converting over 15% of terminal vinylidene groups. The reaction must complete while heating in the presence of a reaction accelerator. The reaction accelerator is a Lewis acid selected from a tin, zinc, aluminium or titanium halide of formula MXy, where M denotes a metal, X denotes a halogen, for example chlorine, bromine or iodine, and y ranges from 2 to 4. Enofil is selected from a group comprising fumaric acid, itaconic acid, maleic acid, acrylic acid, methacrylic acid, crotonic acid, cinnamic acid and corresponding anhydrides or corresponding C1-C4-alkyl ethers.
EFFECT: short reaction time, relatively high output of the product and high degree of functionalisation.
13 cl, 7 tbl, 3 ex