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Preparation method of polystyrene anion-type ion exchange resin

An ion-exchange resin and anion-type technology, applied in the direction of anion exchange, ion exchange, chemical instruments and methods, etc., can solve the problems of complex product structure and unsatisfactory resin exchange performance, and achieve high ion exchange rate, improve the degree, The effect of reducing side effects

Inactive Publication Date: 2015-11-04
ANHUI WANDONG CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing strongly basic anion exchange resins have side reactions such as multiple substitutions and secondary substitutions during the synthesis process, the product structure is complex, and the exchange performance of the resin is not very ideal.

Method used

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  • Preparation method of polystyrene anion-type ion exchange resin

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The preparation method of the polystyrene anionic ion-exchange resin that the present invention proposes may further comprise the steps:

[0030] S1. Mix 180 parts of deionized water, 2.6 parts of polyvinyl alcohol, 3.7 parts of gelatin, 2.6 parts of sodium chloride, and 1.3 parts of sodium persulfate in parts by weight, then heat to 60 ° C, stir until all raw materials are completely dissolved, and adjust The pH of the system is neutral, and then cooled to a temperature of 38° C. to obtain an aqueous phase;

[0031] S2, 175 parts of p-chlorostyrene, 42 parts of divinylbenzene, 2.6 parts of n-heptane, 4.7 parts of cyclohexanone, 3.2 parts of toluene, and 0.6 parts of benzoyl peroxide are added to the water phase and mixed uniformly by weight. Inject nitrogen for 30 minutes, raise the temperature to 76°C and react for 3.2h, wherein, during the process of raising the temperature to 76°C, the heating rate increases gradually, and the average heating rate is 1.2°C / min, then...

Embodiment 2

[0035] The preparation method of the polystyrene anionic ion-exchange resin that the present invention proposes may further comprise the steps:

[0036] S1. Mix 130 parts of deionized water, 3 parts of polyvinyl alcohol, 3 parts of gelatin, 5 parts of sodium chloride, and 0.5 parts of sodium persulfate in parts by weight, then heat to 65°C, stir until all raw materials are completely dissolved, and adjust The pH of the system is neutralized, and then cooled to a temperature of 30° C. to obtain an aqueous phase;

[0037]S2, add 200 parts of p-chlorostyrene, 30 parts of divinylbenzene, 3 parts of n-heptane, 4 parts of cyclohexanone, 4 parts of toluene, and 0.5 part of benzoyl peroxide into the water phase and mix uniformly by weight. After entering nitrogen for 35 minutes, heat up to 70°C for 5 hours, then react at 85°C for 8 hours, and then react at 92°C for 1 hour. After the reaction, wash, filter, dry, and sieve to obtain polystyrene microspheres;

[0038] S3. Mix 100 parts ...

Embodiment 3

[0041] The preparation method of the polystyrene anionic ion-exchange resin that the present invention proposes may further comprise the steps:

[0042] S1. Mix 200 parts of deionized water, 1 part of polyvinyl alcohol, 5 parts of gelatin, 1 part of sodium chloride, and 2 parts of sodium persulfate in parts by weight, then heat to 55 ° C, stir until all raw materials are completely dissolved, and adjust The pH of the system is neutralized, and then cooled to a temperature of 40° C. to obtain an aqueous phase;

[0043] S2, add 150 parts of p-chlorostyrene, 50 parts of divinylbenzene, 1 part of n-heptane, 5 parts of cyclohexanone, 3 parts of toluene, and 1 part of benzoyl peroxide into the water phase and mix evenly by weight. After entering nitrogen for 20 minutes, heat up to 80°C for 3 hours, then react at 90°C for 8 hours, and then react at 98°C for 0.3 hours. After the reaction, wash, filter, dry, and sieve to obtain polystyrene microspheres;

[0044] S3. Mix 150 parts of p...

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Abstract

The invention discloses a preparation method of polystyrene anion-type ion exchange resin. The method comprises the following steps: deionized water, polyvinyl alcohol, gelatin, sodium chloride and sodium persulfate are well mixed, such that an aqueous phase is obtained; p-chlorostyrene, divinyl benzene, a pore-foaming agent and benzoyl peroxide are added, and the mixture is well mixed; the temperature is increased to 70-80 DEG C, and a reaction is carried out for 3-5h; a reaction is carried out for 4-8h under a temperature of 85-90 DEG C; a reaction is carried out for 0.3-1h under a temperature of 92-98 DEG C; washing, filtering, drying and sieving are carried out, such that polystyrene microspheres are obtained; the polystyrene microspheres are well mixed with 1,4-dichloromethoxybutane; phosphorus pentoxide is added, and a reaction is carried out for 5-10h under a temperature of 30-40 DEG C; filtering and washing are carried out, such that chloromethylated microspheres are obtained; the chloromethylated microspheres added into N,N-dimethylformamide; dimethylethanolamine is added; the temperature is increased to 40-45 DEG C and a reaction is carried out for 6-9h; and washing is carried out, such that the polystyrene anion-type ion exchange resin is obtained.

Description

technical field [0001] The invention relates to the technical field of ion exchange resins, in particular to a preparation method of polystyrene anionic ion exchange resins. Background technique [0002] Ion exchange resin is a polymer solid material with stable chemical properties, large molecular weight, high mechanical strength, insoluble in acid, alkali and organic solvents, stable physical and chemical properties, and ion exchange function. It is generally composed of carbon, hydrogen, oxygen, nitrogen and sulfur The element composition is composed of a polymer skeleton with a cross-linked structure, functional groups connected to the skeleton, and exchangeable ions on the functional groups. The polymer skeleton has a three-dimensional network structure, and the polymer chains are cross-linked with each other. The functional groups with exchange groups and fixed ions are chemically bonded to the polymer matrix of the cross-linked structure. The combination of functiona...

Claims

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Application Information

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IPC IPC(8): C08F212/14C08F212/36C08F8/24C08J9/28B01J41/14
Inventor 姚能平樊致娟刘建荣梅德华宣浩洋
Owner ANHUI WANDONG CHEM
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