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A kind of process device and method for the production of cation exchange resin

A kind of technology of cation exchange, process device

Active Publication Date: 2018-01-19
KAIRUI ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are many sulfonating agents capable of sulfonation reactions, such as concentrated sulfuric acid, sulfur trioxide, chlorosulfonic acid, etc., and these sulfonating agents have been successfully applied to the sulfonation reactions of aromatic compounds in liquid states, such as benzene, Alkylbenzene, etc., but because the sulfonation reaction is an exothermic reaction, and the exothermic degree increases with the increase of sulfuric acid concentration, concentrated sulfuric acid is still used as the sulfonation reaction for solid cross-linked polystyrene white balls. After sulfonated resin, the residual acid in the resin is removed by adding dilute acid to concentrated acid to gradually dilute and discharge, and then washed with a large amount of water to obtain the finished resin, and sulfur trioxide is directly used as a sulfonating agent to sulfonate the white ball. The process and method of chemical reaction to prepare cation exchange resin have never been publicly reported.
For a long time, the traditional production process of cation exchange resin has produced a large amount of low-concentration waste acid and acid waste water that has no recycling value. According to statistics, this traditional process will produce 1.5 to 1 ton of cation exchange resin. 2.5 tons of waste acid with a concentration of 75-80% and 2-10 tons of waste acid water with a concentration of 0.1-3%, thus causing serious environmental problems

Method used

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  • A kind of process device and method for the production of cation exchange resin
  • A kind of process device and method for the production of cation exchange resin

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Experimental program
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Effect test

Embodiment 1

[0074] A kind of processing method of cation exchange resin production, comprises the following steps:

[0075] (1) Put 500kg of D001 type macroporous white ball and 300kg dichloroethane produced by our company (Kerry Environmental Technology Co., Ltd.) into the 3000 liter sulfonation reactor 1 through white ball inlet 14 and solvent inlet 15; then open the mother liquor Acid metering tank 4 outlet 23, mother liquor acid circulation pump 5, mother liquor acid inlet 13, 2960kg concentration is the mother liquor acid of 92.5%wt by mother liquor acid metering tank 4 and flows to sulfonation reactor 1; Carry out swelling in chemical reactor, and swelling time is 4 hours;

[0076] (2) After the swelling described in step (1) ends, open the heating steam of the sulfonation reactor 1 and heat it to 120° C., then open the discharge port 21 of the sulfur trioxide metering tank 2 and the sulfur trioxide feed pump 3, through Sulfur trioxide inlet 17 puts 280kg of sulfur trioxide into th...

Embodiment 2

[0085] A kind of processing method for the production of cation exchange resin, operation steps are basically the same as embodiment 1, difference is, in step (1), the dichloroethane of 210kg is replaced into 210kg massfraction and be the concentrated sulfuric acid of 98%, will The D001 type white ball produced by Kairui Environmental Protection Technology Co., Ltd. was replaced with commercially available 001×7 gel-type white ball; 2250kg of 001×7 type hydrogen-type cation exchange resin was obtained, and 180kg of waste acid with a concentration of 69.5% was produced.

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Abstract

The invention discloses a process device and method for cation exchange resin production. The process device comprises a sulfur trioxide adding system, a sulfonation reaction kettle, a washing kettle, an acid liquid recovery system and a resin washing system, wherein the sulfur trioxide adding system, the sulfonation reaction kettle and the washing kettle are sequentially connected; the acid liquid recovery system comprises a mother liquid acid recovery system, a concentrated acid recovery system and a dilute acid recovery system which are parallel; all inlets of the recovery systems are connected with a liquid outlet of the washing kettle; an outlet of the mother liquid acid recovery system is connected with a mother liquid acid inlet of the sulfonation reaction kettle; outlets of the concentrated acid recovery system and the dilute acid recovery system are connected with an acid and pure water inlet of the washing kettle; the resin washing system comprises a pure water washing system and a water filtering tank; an inlet of the pure water washing system is connected with a liquid outlet of the washing kettle; an outlet of the pure water washing system is connected with the acid and pure water inlet of the washing kettle; an inlet of the water filtering tank is connected with a resin discharging opening of the washing kettle; an outlet of the water filtering tank is connected with a waste water inlet of the pure water washing system. Compared with a conventional sulfuric acid sulfonation method, the process method has the advantages that the externally discharged waste acid is reduced by 85 percent or higher, and the externally discharged acid wastewater is reduced by 90 percent or higher.

Description

technical field [0001] The present invention relates to a kind of process device and method for the production of cation exchange resin, which adopts sulfur trioxide instead of traditional sulfuric acid as sulfonating agent to sulfonate solid cross-linked polystyrene beads (referred to as white balls) in a sulfonation reactor, After sulfonation, low-concentration acid is used to replace and recover high-concentration mother liquor sulfuric acid, and the recovered mother liquor sulfuric acid is recycled to the sulfonation reactor as a solvent for sulfur trioxide. Compared with the traditional sulfuric acid sulfonation method, the waste acid discharged by the invention is reduced by more than 85%, and the acid waste water discharged by the invention is reduced by more than 90%. Background technique [0002] Styrene-based cation exchange resins have been widely used in water dehardening and desalination, material purification, hydrometallurgy, industrial catalysis and other fie...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F8/36C08F12/08B01J39/18B01J19/18B01J4/00
CPCB01J4/00B01J4/001B01J19/18B01J39/18B01J2219/00423C08F8/36C08F12/08
Inventor 刘文飞李运来郭为磊靳增峰赵美丽杨建波
Owner KAIRUI ENVIRONMENTAL PROTECTION TECH