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Method for preparing macroporous alkalescent anion exchange resin

A weakly basic anion and exchange resin technology, applied in anion exchange, ion exchange, chemical instruments and methods, etc., can solve the problems of low exchange rate, uneven pore size distribution, large proportion of small pores, etc., and achieve the goal of increasing the adsorption rate Effect

Active Publication Date: 2012-05-23
BEIJING RESEARCH INSTITUTE OF CHEMICAL ENGINEERING AND METALLURGY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although the exchange capacity of the current macroporous weakly basic anion exchange resin has been effectively improved, the pore size distribution is uneven, the proportion of small pores is too large, and the exchange rate is low.
There are few literatures on the synthesis of homoporous resins, and only the synthesis process, that is, the chloromethylation and amination process, is mentioned, and the specific method and specific data of the uniform pore size of the resin are not mentioned.

Method used

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  • Method for preparing macroporous alkalescent anion exchange resin
  • Method for preparing macroporous alkalescent anion exchange resin
  • Method for preparing macroporous alkalescent anion exchange resin

Examples

Experimental program
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Effect test

Embodiment 1

[0014] (1) Styrene and divinylbenzene as monomers are washed with sodium hydroxide lotion, the polymerization inhibitor is removed, and dried for subsequent use after separation; wherein the quality of styrene is 48.5g, and the volume is 53.5ml, and divinylbenzene The mass of is 5.9g, the volume is 6.5ml;

[0015] (2) Add gelatin as a dispersant to 60ml of deionized water and soak for 2 hours, heat to 40°C; then add ammonium salt; wherein the quality of gelatin is 0.3g, and the quality of ammonium salt is 0.03g of the water quality;

[0016] (3) Mix monomer, benzoyl peroxide as initiator and butanol and lauryl alcohol as porogen, add in (2), after forming ball beads of suitable size, heat up to 75 ℃, keep warm for 4 hours; heat up to 85 ℃, keep warm for 6 hours, distill 2-3 times with deionized water, and filter with suction, then extract with acetone, dry at 50 ℃; sieve to obtain styrene- A copolymer of divinylbenzene, i.e. white ball; wherein the mass of benzoyl peroxide is...

Embodiment 2

[0023] (1) Styrene and divinylbenzene as monomers are washed with sodium hydroxide lotion, and the polymerization inhibitor is removed, and dried for subsequent use after separation; wherein the quality of styrene is 47.1g, and the volume is 51ml, and the amount of divinylbenzene The mass is 3.7g and the volume is 4ml;

[0024] (2) Add gelatin as a dispersant to 110ml of deionized water and soak for 3 hours, heat to 45°C; then add ammonium salt; wherein the quality of gelatin is 1.1g, and the quality of ammonium salt is 0.11g of the water quality;

[0025] (3) Mix monomer, benzoyl peroxide as initiator and butanol and lauryl alcohol as porogen, add in (2), after forming ball beads of suitable size, heat up to 78 ℃, keep warm for 5 hours; heat up to 88 ℃, keep warm for 8 hours, distill 2-3 times with deionized water, and filter with suction, then extract with acetone, dry at 55 ℃; sieve to obtain styrene- A copolymer of divinylbenzene, i.e. white ball; wherein the mass of benz...

Embodiment 3

[0032] (1) Styrene and divinylbenzene as monomers are washed with sodium hydroxide lotion, the polymerization inhibitor is removed, and dried for subsequent use after separation; wherein the quality of styrene is 41.9g, and the volume is 46.2ml, and divinylbenzene The mass is 6.6g and the volume is 7.2ml;

[0033] (2) Add gelatin as a dispersant to 160ml of deionized water and soak for 4 hours, heat to 50°C; then add ammonium salt; wherein the quality of gelatin is 2.4g, and the quality of ammonium salt is 0.16g of the water quality;

[0034] (3) Mix monomer, benzoyl peroxide as initiator and butanol and lauryl alcohol as porogen, join in (2), after forming ball beads of suitable size, heat up to 80 ℃, keep warm for 6 hours; heat up to 90 ℃, keep warm for 10 hours, distill 2-3 times with deionized water, and filter with suction, then extract with acetone, dry at 60 ℃; sieve to obtain styrene- A copolymer of divinylbenzene, i.e. white ball; wherein the mass of benzoyl peroxide...

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Abstract

The invention relates to a method for preparing macroporous alkalescent anion exchange resin, which sequentially comprises the following steps that: 1, mixed alcohol of butanol and dodecanol according to the mol ratio of 1:0.3 is used as porogens, benzoyl peroxide is used as initiating agents, and gelatin and a small amount of ammonium salt are used as dispersing agents, so styrene and divinylbenzene are crosslinked and copolymerized to obtain the styrene-divinylbenzene copolymers; the volume of the porogens is 1 to 1.2 times the sum of the volume of the styrene and the divinylbenzene, the mol ratio of the divinylbenzene to the styrene is (4-8):100; 2, under the catalytic effect of zinc chloride, chloromethyl methyl ether is used for carrying out chloromethylation on white balls, and chloromethylation copolymers are obtained; and 3, dimethylamine solution is used for ammonifying chlorine balls, and the macroporous alkalescent anion exchange resin is obtained. The method has the advantages that the mesopore proportion of the white balls is improved, the absorption speed of the ion exchange resin is accelerated, the white balls are ensured to have a certain number of small-hole proportions, and the exchange volume of the ion exchange resin is ensured.

Description

technical field [0001] The invention relates to a preparation method of a macroporous anion exchange resin, in particular to a preparation method of a macroporous weakly basic anion exchange resin with uniform pore size and maintained exchange capacity. Background technique [0002] Weakly basic anion exchange resins have important uses in the fields of uranium ore dressing and metallurgy, hydrometallurgy, and wastewater treatment. At present, the traditional synthesis process of basic resin is mainly to introduce chloromethyl group on the copolymer, i.e. white ball, to obtain chloromethylated copolymer, namely chlorine ball, and then introduce the corresponding amino group on the chlorine ball through ammoniation process. . [0003] Although the exchange capacity of the current macroporous weakly basic anion exchange resin has been effectively improved, the pore size distribution is uneven, the proportion of small pores is too large, and the exchange rate is low. There ar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J41/14
Inventor 封宇李伟才周根茂刘超邓舜勤
Owner BEIJING RESEARCH INSTITUTE OF CHEMICAL ENGINEERING AND METALLURGY
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