Strongly acidic cation exchange resin for amphoteric homogeneous mixed bed and preparation method of strong-acid cation exchange resin

A technology of strongly acidic cations and exchange resins, applied in the direction of cation exchange materials, etc., can solve problems such as huge market consumption, achieve the effects of reducing production costs, increasing production, and uniform particle size

Pending Publication Date: 2021-11-26
中国船舶集团有限公司第七零七研究所九江分部
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the mixed bed resin is expensive, in order to improve and ensure the water quality stability of the ultrapure water system and ensure the high-quality product rate of the production line products, users use one-time use, and the market consumption is huge.

Method used

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Embodiment 1

[0067] A preparation method for an amphoteric homogeneous mixed-bed strongly acidic cation exchange resin, comprising the following steps:

[0068] Refer to attached Figure 1-2 .

[0069] 1) Cationic resin polymerization process: Cross-linked polystyrene embedded skeleton polymerization: 85% styrene, 3% divinylbenzene, 0.1% nano core, 0.05% emulsifier, 0.6% initiator and other liquid monomers are mixed in a certain proportion After uniformity, spray into the dispersant aqueous solution through the injection device and then stir for 0.5-3h, the stirring speed is 120-180rpm, polymerize into spherical particles of 0.3-0.6mm, and carry out curing treatment at 75±5°C for 6-10h, Finally, wash with 95°C water for 3-5 times before use.

[0070] Among them, the concentration of the dispersant aqueous solution is 0.2-4%, and the main components are 1.5-3% (w / w) gelatin, 0.5-1.5% (w / w) hydroxyethyl cellulose, 3-6% (w / w) ) polyvinyl alcohol, and the rest is water.

[0071] 2) Functio...

Embodiment 2

[0077] A kind of preparation method of strongly acidic cation exchange resin for amphoteric homogeneous mixed bed, resin synthesis steps are as embodiment 1, and embodiment 1 is different:

[0078] 97% styrene, 15% divinylbenzene, 0.3% nano core, 0.2% emulsifier, 1.2% initiator

[0079] Cross-linked polystyrene embedded skeleton formula: 90% (w / w) styrene, 10% (w / w) divinylbenzene, 0.12% (w / w) nano carbon powder, 0.1% (w / w) ten Sodium dialkylbenzene sulfonate, 0.8% (w / w) benzoyl peroxide.

[0080] After sulfonation of the cross-linked polystyrene embedded framework, the mass exchange capacity of the resin is 5.03mmol / g (dry), the water content is 65.86%, the volume exchange capacity is 1.25mmol / ml, and the wet true density is 1.130g / ml. The average particle size detected by the particle size analyzer is 500 μm.

Embodiment 3

[0082] A kind of preparation method of strongly acidic cation exchange resin for amphoteric homogeneous mixed bed, resin synthesis steps are as embodiment 1, and embodiment 1 is different:

[0083] Cross-linked polystyrene embedded framework formula: 92% (w / w) styrene, 8% (w / w) divinylbenzene, 0.1% (w / w) nano-graphene, 0.1% (w / w) ten Sodium Dialkyl Sulfonate, 1.0% (w / w) Benzoyl Peroxide.

[0084] After sulfonation of the cross-linked polystyrene embedded framework, the mass exchange capacity of the resin was 5.01mmol / g (dry), the water content was 64.75%, the volume exchange capacity was 1.29mmol / ml, and the wet true density was 1.123. The average particle size detected by the particle size analyzer is 530 μm.

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Abstract

The invention discloses strongly acidic cation exchange resin for an amphoteric homogeneous mixed bed, and belongs to the technical field of cation exchange resin. A preparation method comprises the following steps: (1) preparing a crosslinked polystyrene embedded skeleton; (2) carrying out shell-type sulfonation reaction on the crosslinked polystyrene embedded skeleton and dichloroethane in a sulfuric acid system; and (3) diluting with acid, transforming and washing to obtain the strongly acidic cation exchange resin. According to the method, the yield of the cross-linked polystyrene embedded skeleton is improved by utilizing a multi-channel injection method, the production period of the chlorination reaction is shortened, the yield is improved, and the production cost is further reduced. Meanwhile, re-layering of the mixed cation resin and anion resin in the using process can be prevented, the effluent quality is good, the periodic water production amount is large, the manufacturing and operating cost is low, energy is saved, consumption is reduced, and the ecological environment is protected.

Description

technical field [0001] The invention relates to the technical field of cation exchange resins, in particular to a strongly acidic cation exchange resin for amphoteric homogeneous mixed beds and a preparation method thereof. Background technique [0002] At present, the cationic and anionic resins need to be regenerated on the mixed bed of condensate polishing treatment after their failure. Before the regeneration, the cationic and anionic resins must be completely separated. Otherwise, the non-separated cationic and anionic resins cannot be regenerated, and crossover will occur when the separation is not complete. Pollution will ultimately affect the water quality of the mixed bed effluent and the amount of periodic water production. In order to facilitate the separation of resins, usually in the synthesis, the particle size of the cationic resin is artificially made coarse and the specific gravity is increased, while the particle size of the anionic resin is made fine and t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J39/20C08F212/08C08F212/36
CPCC08F212/08B01J39/20C08F212/36
Inventor 于少晖柳堤刘伟萍叶扬天武永前鄢恒飞刘晓锋谢若其余炎子
Owner 中国船舶集团有限公司第七零七研究所九江分部
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