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Preparation method of polystyrene sulfonic acid type ion exchange resin

A polystyrene sulfonic acid type, ion exchange resin technology, applied in the direction of ion exchange, anion exchange, chemical instruments and methods, etc., can solve the problems of mechanical strength, heat resistance, ion exchange rate and specific surface area, etc. Low chemical efficiency, many by-products, etc., to achieve the effect of improving efficiency, reducing side reactions, and reducing reactivity

Inactive Publication Date: 2015-11-18
ANHUI WANDONG CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing polystyrene sulfonic acid ion exchange resins often have low sulfonation efficiency and many by-products, which cause mechanical strength, heat resistance, ion exchange rate and specific surface area of ​​the obtained polystyrene sulfonic acid ion exchange resins. Not ideal, limits its application

Method used

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  • Preparation method of polystyrene sulfonic acid type ion exchange resin

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A kind of preparation method of polystyrene sulfonic acid type ion-exchange resin that the present invention proposes, comprises the following steps:

[0031] S1. Mix 130 parts of deionized water, 3 parts of polyvinyl alcohol, 3 parts of ethanol, 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 value of the system is neutral, and then cooled to a temperature of 30° C. to obtain an aqueous phase;

[0032] S2. Add 150 parts of styrene, 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 by weight and mix evenly, and then pass nitrogen gas After 20 minutes, raise the temperature to 80°C for 2.5h, then react at 90°C for 5h, and then react at 95°C for 0.5h. After the reaction, wash, filter, dry, and sieve to obtain polystyrene microspheres;

[0033] S3. A...

Embodiment 2

[0035] A kind of preparation method of polystyrene sulfonic acid type ion-exchange resin that the present invention proposes, comprises the following steps:

[0036] S1. Mix 200 parts of deionized water, 1 part of polyvinyl alcohol, 5 parts of ethanol, 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 value of the system is neutral, then cooled to a temperature of 40°C to obtain an aqueous phase;

[0037]S2, add 200 parts of styrene, 30 parts of divinylbenzene, 3 parts of n-heptane, 2 parts of cyclohexanone, 4 parts of toluene, and 0.5 parts of benzoyl peroxide into the water phase and mix evenly, and pass into nitrogen After 35 minutes, heat up to 70°C for 4 hours, then react at 85°C for 8 hours, and then react at 91°C for 1 hour. After the reaction, wash, filter, dry, and sieve to obtain polystyrene microspheres;

[0038] S3. Add 1 part of polystyrene ...

Embodiment 3

[0040] A kind of preparation method of polystyrene sulfonic acid type ion-exchange resin that the present invention proposes, comprises the following steps:

[0041] S1. Mix 150 parts of deionized water, 2.3 parts of polyvinyl alcohol, 4.2 parts of ethanol, 3.2 parts of sodium chloride, and 1.2 parts of sodium persulfate in parts by weight, then heat to 63 ° C, stir until all raw materials are completely dissolved, and adjust The pH value of the system is neutral, and then cooled to a temperature of 36° C. to obtain an aqueous phase;

[0042] S2. Add 190 parts of styrene, 39 parts of divinylbenzene, 2.4 parts of n-heptane, 3 parts of cyclohexanone, 3.8 parts of toluene, and 0.7 parts of benzoyl peroxide into the water phase and mix evenly, and pass into nitrogen 33min, heat up to 73°C and react for 3.6h, wherein, during the process of heating up to 73°C, the heating rate gradually increases, and the average heating rate is 1°C / min, then react at 87°C for 7h, and then react at ...

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Abstract

The invention discloses a preparation method of polystyrene sulfonic acid type ion exchange resin. The preparation method comprises steps as follows: deionized water, polyvinyl alcohol, ethanol, sodium chloride and sodium persulfate are mixed uniformly, and an aqueous phase is obtained; styrene, divinylbenzene, n-heptane, cyclohexanone, methylbenzene and benzoyl peroxide are added to the aqueous phase to be uniformly mixed, react for 2.5-4 h at the temperature ranging from 70 DEG C to 80 DEG C, react for 5-8 h at the temperature ranging from 85 DEG C to 90 DEG C, react for 0.5-1 h at the temperature ranging from 91 DEG C to 95 DEG C and is washed, filtered, dried and screened, and then polystyrene microspheres are obtained; the polystyrene microspheres are added to dichloroethane to be swollen, a sulfonating agent is added, the mixture reacts for 4-5 h at the temperature ranging from 50 DEG C to 60 DEG C, and the polystyrene sulfonic acid type ion exchange resin is obtained. According to the preparation method of the polystyrene sulfonic acid type ion exchange resin, the operation is simple, conditions are mild, and the obtained polystyrene sulfonic acid type ion exchange resin has high mechanical strength, good heat resistance, a high ion exchange rate and a large specific surface area.

Description

technical field [0001] The invention relates to the technical field of ion exchange resins, in particular to a preparation method of polystyrene sulfonic acid 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 fun...

Claims

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Application Information

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IPC IPC(8): C08F212/08C08F212/36C08F8/36C08J9/28B01J41/14
Inventor 刘建荣姚能平樊致娟梅德华宣浩洋
Owner ANHUI WANDONG CHEM
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