Preparation method of solvent-free gel type styrene cation exchange resin

A cation exchange and styrene-based technology, which is applied in the field of preparation of solvent-free gel-type styrene-based cation-exchange resins, can solve the problems of shortening the service life of the resin, reducing strength, and potential safety hazards, so as to improve the polarity of white balls and simplify process, the effect of improving safety

Inactive Publication Date: 2020-04-21
山东德川化工科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the 1,2-dichloroethane in the system will be distilled out by vacuum distillation after the white ball sulfonation is completed, there will always be 1,2-dichloroethane remaining in the resin. The cation exchange resin is widely used in hard water softening, Pure water preparation, etc., especially when the cation exchange resin is used in drinking water treatment, the existence of 1,2-dichloroethane has become a greater safety hazard
During the gradient acid dilution, the residual 1,2-dichloroethane in the resin inevitably enters each gradient of the diluted acid, so this also leads to the subsequent reuse of the gradient diluted acid or further material treatment due to the 1,2-Dichloroethane caused some trouble
[0013] Generally used in the food industry or drinking water treatment industry, the cation exchange resin needs to be cooked and cleaned to remove 1,2-dichloroethane as much as possible. The resin cooking process increases the refining treatment cost of the manufacturer, and The strength of the resin tends to decrease after cooking, which shortens the service life of the resin and increases the frequency of resin replacement, thus increasing the user cost

Method used

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  • Preparation method of solvent-free gel type styrene cation exchange resin
  • Preparation method of solvent-free gel type styrene cation exchange resin
  • Preparation method of solvent-free gel type styrene cation exchange resin

Examples

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Embodiment 1

[0059] Weigh 11 parts of divinylbenzene with a mass fraction of 63%, 3 parts of methyl acrylate, 86 parts of styrene, and 1 part of BPO in a 500ml beaker, and stir evenly on a magnetic stirrer; add 225 parts of Water, add 0.4 parts of polyvinyl alcohol, stir at 40°C for 0.5 hours, add 12 parts of sodium chloride, heat up to 55°C, add the oil phase that has been stirred evenly in advance, adjust the stirring speed at 150 rpm, heat up to 75°C and keep warm 3h, then raise the temperature to 95°C and mature for 3h, cool down, and the white balls will be obtained; wash with hot water at about 80°C for 3 times, rinse with tap water, filter out the water, and dry at 70°C. After drying, sieve white balls with a particle size of 0.315-0.710mm.

[0060] Weigh 100g of 0.315-0.710mm white balls, add 600g of 93.5% sulfuric acid into a 1000ml three-neck flask, heat up to 80°C for 2 hours, heat up to 115°C for 6 hours for sulfonation reaction, cool down to about 40°C after the reaction, add ...

Embodiment 2

[0062] In a 500ml beaker, 12 parts of divinylbenzene with a mass fraction of 63%, 4 parts of acrylic acid, 84 parts of styrene, and 1 part of BPO are weighed in a 500ml beaker, and stirred evenly on a magnetic stirrer; 250 parts of water are added in a 1000 ml three-necked flask, Add 0.4 parts of polyvinyl alcohol, stir at 40°C for 0.5 hours, add 15 parts of sodium chloride, heat up to 55°C, add the oil phase that has been stirred evenly in advance, adjust the stirring speed at 150 rpm, raise the temperature to 77°C and keep for 3 hours, Then heat up to 95°C and mature for 3 hours, then cool down to produce white balls; wash with hot water at about 80°C for 3 times, rinse with tap water, filter out the water, and dry at 70°C. After drying, sieve white balls with a particle size of 0.315-0.710mm.

[0063] Weigh 100g of 0.315-0.710mm white balls, add 650g of 95% sulfuric acid into a 1000ml three-necked flask, raise the temperature to 80°C and keep it for 2h, then raise the tempe...

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Abstract

The invention belongs to the technical field of cation exchange resins, and particularly relates to a preparation method of a solvent-free gel type styrene cation exchange resin. The method comprises:carrying out suspension polymerization on styrene, divinylbenzene and a third monomer under the action of an initiator to prepare white balls; and carrying out a sulfonation reaction on the white balls and sulfuric acid, and carrying out post-treatment after the reaction is finished to obtain the solvent-free gel type styrene cation exchange resin. According to the preparation method of the solvent-free gel type styrene cation exchange resin, a white ball swelling reagent 1,2-dichloroethane is not used, so that the safety of a resin product is improved, the refining treatment process is simplified, and the refining treatment cost of an enterprise is reduced.

Description

technical field [0001] The invention belongs to the technical field of cation exchange resins, and in particular relates to a preparation method of a solvent-free gel-type styrene-based cation exchange resin. Background technique [0002] The general synthesis process of gel-type styrene-based cation exchange resin is as follows: [0003] (1) Preparation of white balls: Suspension polymerization of styrene and divinylbenzene in the presence of an initiator to prepare transparent particles with a particle size of 0.315-1.00 mm (ie white balls, styrene-divinylbenzene copolymer). [0004] (2) Preparation of ion exchange resin: the obtained white balls are dried at 60°C-80°C and screened for particle size, and sulfuric acid with a concentration of more than 90% is used for sulfonation reaction with the white balls at a temperature of 80°C-135°C. Grafting of sulfonic acid groups onto styrene-divinylbenzene copolymers. Since the copolymer has a tight three-dimensional network st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F212/08C08F212/36C08F220/14C08F220/06C08F8/36C08F2/20B01J39/20
CPCB01J39/20C08F2/20C08F8/36C08F212/08C08F212/36C08F220/14C08F220/06
Inventor 郭汉法王家伟王莎莎李岩峰潘健周小会靳荣华翟俊峰
Owner 山东德川化工科技有限责任公司
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