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Strong-acid type polystyrene cation exchange resin as well as preparation method and application thereof

A cation exchange, polystyrene technology, applied in cation exchange materials, chemical instruments and methods, other chemical processes, etc., can solve the problems of cumbersome production process, poor resin quality, unenvironmental protection, etc., and achieve simple and controllable preparation process. Low cost of raw materials and high moisture content

Active Publication Date: 2012-08-08
GANZHOU RARE EARTH MINERAL IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the poor quality of the resin produced by the above-mentioned raw materials, cumbersome resin production process, and non-environmental protection, and provides a simple, environmentally friendly, uniform cross-linked structure, large exchange capacity, strong acid polystyrene cation exchange resin and its preparation method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Add 200ml of 0.1% gelatin aqueous solution into a 500ml three-necked flask, and then add 45g of styrene, 0.45g of methylenebisacrylamide, 4.5g of toluene and 0.225g of azoisobutyronitrile solution that have been mixed uniformly in advance. React at 40°C for 0.5h at a stirring speed of 500r / min to form balls. Then heat up to 80°C for setting for 1 hour, and finally age at 95°C for 1 hour. After filtration, the crude product microspheres were obtained, and 100 ml of methanol was added to sonicate for 4 hours, and polystyrene microspheres were obtained by filtration.

[0027] Put 30g of the above-mentioned microspheres into a 250ml three-necked flask, add 100g of dichloroethane to swell for 0.5h, add 3ml of concentrated sulfuric acid, and react at 0°C for 8h. Polystyrene cation exchange resin.

Embodiment 2

[0029] Add 200ml of 1% gelatin aqueous solution into a 500ml three-necked flask, and then add 45g of styrene, 22.5g of methylenebisacrylamide, 90g of toluene and 0.9g of azoisobutyronitrile solution that have been mixed uniformly in advance. React at 60°C for 2 hours at a stirring speed of 5000r / min to form balls. Then heat up to 95°C for setting for 8 hours, and finally age at 110°C for 8 hours. After filtration, the crude product microspheres were obtained, and methanol was added to sonicate for 1 h, filtered, and dried to obtain polystyrene microspheres.

[0030] Put 30g of the above-mentioned microspheres into a 250ml three-neck flask, add 50g of dichloroethane to swell for 2 hours, add 60ml of chlorosulfonic acid, and react at 80°C for 1 hour. type polystyrene cation exchange resin.

Embodiment 3

[0032] Add 200ml of 0.5% polyvinyl alcohol aqueous solution to a 500ml three-necked bottle, and then add 45g of styrene, 2.5g of methylenebisacrylamide, 90g of liquid paraffin and 0.9g of ammonium persulfate solution that have been mixed uniformly in advance. React at 50°C for 1h at a stirring speed of 3000r / min to form balls. Then heat up to 90°C for 4 hours, and finally age at 100°C for 4 hours. After filtration, the crude product microspheres were obtained, and ethanol was added for ultrasonic washing, and polystyrene microspheres were obtained by filtration.

[0033] Put 30g of the above-mentioned microspheres into a 250ml three-necked flask, add dichloroethane to swell, add 10ml of chlorosulfonic acid, and react at 40°C for 4 hours. Ethylene cation exchange resin.

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Abstract

The invention relates to a strong-acid type polystyrene cation exchange resin as well as a preparation method and application thereof. The strong-acid type polystyrene cation exchange resin is characterized in that styrene is used as a monomer, methylene diacrylyl is used as a cross-linking agent, and the mass ratio of the monomer styrene to the cross-linking agent methylene diacrylyl is 1:(0.01-0.5). The preparation method comprises the steps of: performing balling, sizing and ageing on the styrene and the methylene diacrylyl under the action of a porogen and an initiator to obtain microspheres, then ultrasonically washing in an alcohol solvent to remove the porogen, performing sulfonation treatment to obtain a sulfonation product, then, directly pouring the solfonation product into ice water, and washing and filtering to obtain the strong-acid type polystyrene cation exchange resin. The strong-acid type polystyrene cation exchange resin has the advantages of high qualification rate, uniform cross-linking structure, high moisture content, large ion exchange capacity, low raw material cost, simple, convenient and controllable synthesis process, and environment friendliness, is applied to adsorption of rare earth metal ions without pretreatment or addition of other reagents, is pollution-free without generation of any wastes and is good in adsorption effect.

Description

technical field [0001] The invention belongs to the technical field of polymer ion exchange resins, and relates to a strong acid type cation exchange resin. Background technique [0002] Strong-acid cation exchange resins, as catalysts, have been widely used in organic reactions such as esterification, hydrolysis, condensation, hydration, alkylation, and acylation in the chemical industry in recent years. As a heterogeneous catalyst, it is easy to separate from the product, easy to achieve continuous and automatic reaction, and simplify the process and equipment, so it has outstanding advantages in process. [0003] At present, the traditional production process of strongly acidic polystyrene-based cation exchange resins is mostly free radical suspension copolymerization of styrene monomer and divinylbenzene, followed by sulfonation (He Binglin, 'Ion Exchange and Adsorption Resin', Shanghai Science and Technology Co., Ltd. Education Press, 1995). As a cross-linking agent, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J39/20B01J20/26B01J20/30
Inventor 马睿曹晓秋严春杰谢志宏郭小斌高洁暴峰王莉李福建梁玉军王永钱葛文栗海峰陈涛
Owner GANZHOU RARE EARTH MINERAL IND
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