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Method for performing positioning sulfonation on cation exchange resin by using sulfur trioxide

A technology of cation exchange and sulfur trioxide, applied in cation exchange, cation exchange materials, ion exchange, etc., can solve the problems of poor effect of macroporous ion exchange resin, affecting the use effect, instability of sulfonic acid groups, etc., to achieve Low cost, low dosage, not easy to fall off

Active Publication Date: 2012-08-22
KAIRUI ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this patented method is only applicable to gel-type ion-exchange resins, and the effect on macroporous ion-exchange resins is not good, and the sulfonation is uneven. The sulfonic acid group is not only on the styrene benzene ring, but also on divinylbenzene. On the benzene ring, this causes the instability of the sulfonic acid group, which is easy to fall off during use, affecting the use effect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 1). Pretreatment of white balls for polymerization

[0023] Select the D001 ion exchange resin polymerized white ball produced by Kairui Chemical Co., Ltd., after drying, extract the porogen and dry it for use;

[0024] 2). Preparation of complexes

[0025] Add trimethylamine with a concentration of 1% by mass of liquid sulfur trioxide into the liquid sulfur trioxide, stir at normal temperature to form a complex,

[0026] 3).Sulfonation reaction

[0027] Adopt the styrene-based cation exchange resin polymerized white ball produced in 1), pack in the fixed bed, mix sulfur trioxide and ethylene dichloride in the mixer, add sulfur trioxide complex and occupy 50% of organic solvent quality, use Pump into the fixed bed, the reaction temperature is 60°C, the space velocity is 0.5 / h, and the reaction time is 1h. The qualified product can be obtained, and the obtained product number is KRB-1.

Embodiment 2

[0029] Select the D006 ion exchange resin polymerized white ball produced by Kairui Chemical Co., Ltd., and the others are the same as in Example 1. The resulting product number is KRB-2.

Embodiment 3

[0031] Select the D008 ion exchange resin polymerized white ball produced by Kairui Chemical Co., Ltd., and the others are the same as in Example 1. The resulting product number was KRB-3.

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PUM

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Abstract

The invention provides a method for performing positioning sulfonation on cation exchange resin, which comprises the following steps of: firstly, forming a complex by using sulfur trioxide and organic amine; and then, mixing the complex with an organic solvent, and feeding the mixture into a stationary bed to perform polymerization white ball reaction with styrenic cation exchange resin for 1-8 hours at the reaction temperature of between 60 and 90 DEG C and the airspeed of between 0.5 and 4 / h. Relative to a general sulfonation method for ion exchange resin, the method provided by the invention is high in reaction selectivity, less in side reaction, low in unit consumption of raw materials and cost and small in usage amount, and has no pollution problem of a large amount of waste acid; moreover, sulfonic groups are difficultly dropped.

Description

technical field [0001] The invention relates to a method for sulfonating a cation exchange resin, in particular to a method for sulfonating a cation exchange resin using sulfur trioxide for positioning. technical background [0002] Introduction of -SO into organic molecules 3 The reaction of the group is called sulfonation or sulfation reaction. Sulfonation refers to the reaction in which sulfur atoms are connected to carbon atoms. The resulting product is a sulfonic acid compound. There are many industrial sulfonation methods. [0003] The sulfonation method using concentrated sulfuric acid as a sulfonating agent has been industrialized as early as 1930, and is the most widely used and longest-running process. Because the excess sulfuric acid added by this method can reduce the viscosity of the material and help heat transfer, the reaction is mild, the side reactions are few, and it is easy to control, but waste acid treatment, equipment corrosion, etc. are still industr...

Claims

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Application Information

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IPC IPC(8): B01J39/18B01J39/20B01J47/016
Inventor 王金明刘文飞
Owner KAIRUI ENVIRONMENTAL PROTECTION TECH
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