Method for preparing sulfonated polystyrene (strongly acid type) cation exchange resin

A technology of sulfonated polystyrene and cation exchange, which is applied in the field of preparation of sulfonated polystyrene strong-acid cation exchange resin, can solve the problems that heat preservation and transportation cannot meet the ideal requirements, and achieve high sulfonation degree, low reaction temperature, cost saving effect

Inactive Publication Date: 2011-05-04
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Despite this, insulated transportation still cannot meet the ideal requirements

Method used

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  • Method for preparing sulfonated polystyrene (strongly acid type) cation exchange resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Weigh 1.04g of reaction polymer containing benzene ring structure (average particle size: 220-260 μm, cross-linking degree 7%), in 10ml HCCl 3 After swelling in the medium for 3 hours, add 0.7ml of chlorosulfonic acid into the three-neck flask, and react at 60° C. for 25 minutes to obtain a sulfonated polystyrene resin with a sulfonation degree of 100%.

Embodiment 2

[0018] Weigh 1.04g of reaction polymer containing benzene ring structure (average particle size: 220-260 μm, cross-linking degree 15%), in 8ml CCl 4 After swelling in the medium for 6 hours, add 0.7ml of chlorosulfonic acid into the three-neck flask, and react at 30°C for 5 minutes to obtain a sulfonated polystyrene resin with a sulfonation degree of 45%.

Embodiment 3

[0020] Weigh 1.04g of reaction polymer containing benzene ring structure (average particle size: 0.01μm, cross-linking degree 0.1%), in 12ml CCl 4 Swell for 0.5 hour, add 0.7ml of chlorosulfonic acid into the three-neck flask, and react at 0°C for 30 minutes to obtain a sulfonated polystyrene resin with a sulfonation degree of 54%.

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Abstract

The invention relates to a method for preparing sulfonated polystyrene (strongly acid type) cation exchange resin by taking chlorosulfonic acid as a sulfonating agent. The method has the following characteristics: 1. the advantages of low reaction temperature, short time, less dosage, high sulfonation degree, cost saving, environmental protection and the like can be achieved since chlorosulfonic acid is used as a sulfonating agent; and 2. the sulfonation degree of the resin prepared by using chlorosulfonic acid as a sulfonating agent is controllable in the range of 0.01-95%.

Description

technical field [0001] The present invention relates to the preparation method of sulfonated polystyrene strong-acid cation exchange resin, which is characterized in that: chlorosulfonic acid and cross-linked polystyrene can react under conditions of relatively low temperature and short time to obtain ion exchange resin with high sulfonation degree , and the amount of chlorosulfonic acid is less, which can save more than half of the production cost compared with sulfuric acid as the sulfonating agent. [0002] Cross-linked sulfonated polystyrene strong acid cation exchange resin (SPS) is used as a solid acid catalyst, which is easy to handle and store; has no corrosive effect on equipment; easy to separate the reaction mixture after the reaction; easy to realize continuous production process; high stability , easy regeneration, low application cost; can eliminate the pollution of liquid acid. [0003] SPS has a wide range of uses: it can effectively catalyze esterification re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F12/08C08F8/36
Inventor 刘晓宁魏荣卿周蕊
Owner NANJING UNIV OF TECH
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