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A kind of strongly basic anion exchange resin and preparation method thereof

An exchange resin and anion technology, applied in anion exchange, ion exchange, chemical instruments and methods, etc., can solve the problems of strong carcinogenicity, low boiling point, volatile, health threat to production operators, and impact on the sustainable development of the industry. Development prospects and practical significance, the effect of solving safety and environmental protection problems, and reducing production costs

Active Publication Date: 2018-02-16
SHANGHAI RESIN FACTORY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, chloromethyl ether is widely used as a chloromethylation reagent in the industry. Due to its strong carcinogenicity and low boiling point and volatility, it poses a great threat to the health of production operators and causes great pollution to the environment, thus affecting Sustained development of the entire industry

Method used

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  • A kind of strongly basic anion exchange resin and preparation method thereof
  • A kind of strongly basic anion exchange resin and preparation method thereof
  • A kind of strongly basic anion exchange resin and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] (1) Chloromethylation of cross-linked polystyrene

[0053] Add 53 parts of n-heptanol, 6 parts of paraformaldehyde, and 55 parts of dichloromethane into the reaction container in sequence, and drop 51 parts of thionyl chloride into the container. The dropping time is controlled at 3 hours, and the temperature is controlled at 3-5°C. After the dropwise addition, react at 3-10°C for 4h. After the reaction, add 10 parts of cross-linked polystyrene resin (cross-linking degree is 7%) swollen with 32 parts of dichloromethane in the system in advance, add dropwise 28 parts of tin tetrachloride under stirring, control at 3- 5°C, the dropwise addition was completed in 2h, and the reaction was continued for 20h, and the temperature was controlled at 15-22°C. After the reaction, the reaction solution was filtered, and the resulting filter balls were washed with hydrochloric acid aqueous solution, dioxane, and deionized water with a mass fraction of 10-33%, and dried in vacuum at ...

Embodiment 2

[0061] (1) Chloromethylation of cross-linked polystyrene

[0062] Add 24 parts of n-heptanol, 8 parts of paraformaldehyde, and 27 parts of dichloromethane into the reaction container in sequence, and drop 38 parts of thionyl chloride into the container. The dropping time is controlled at 3 hours, and the temperature is controlled at 3-5°C. After the dropwise addition, react at 3-10°C for 4h. After the reaction, add 9 parts of cross-linked polystyrene resin (cross-linking degree is 7%) swollen with 32 parts of dichloromethane in advance in the system, add dropwise 22 parts of tin tetrachloride under stirring, control at 3- 5°C, the dropwise addition was completed in 2h, and the reaction was continued for 20h, and the temperature was controlled at 15-22°C. After the reaction is finished, the reaction liquid is filtered, and the obtained filter balls are washed with 10-33 wt% hydrochloric acid aqueous solution, dioxane, and deionized water, and vacuum-dried at 60° C. to obtain c...

Embodiment 3

[0069] (1) Chloromethylation of cross-linked polystyrene

[0070] Add 25 parts of n-heptanol, 6 parts of paraformaldehyde, and 23 parts of dichloromethane into the reaction container in sequence, and drop 63 parts of thionyl chloride into the container. The total dropping time is controlled at 3 hours, and the temperature is controlled at 3-5°C , After the dropwise addition, react at 3-5°C for 4h. After the reaction, add 11 parts of cross-linked polystyrene resins swollen with 32 parts of dichloromethane in advance in the system (cross-linking degree is 7%), add dropwise 30 parts of tin tetrachloride under stirring, control at 3- 5°C, the dropwise addition was completed in 2h, and the reaction was continued for 20h, and the temperature was controlled at 10-15°C. After the reaction, the reaction solution was filtered, and the obtained filter balls were washed with 10-33 wt% hydrochloric acid aqueous solution, dioxane, and deionized water, and dried in vacuum at 60°C to obtain ...

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Abstract

The invention discloses a preparation method of strongly alkaline anion exchange resin, which comprises the following steps: enabling n-heptanol to react with paraformaldehyde in the presence of thionyl chloride; then, adding crosslinked polystyrene resin into a system, and carrying out chloromethylation reaction under the condition of stannic chloride catalysis, so that chloromethylated crosslinked polystyrene is obtained, and chloromethyl heptyl ether is converted into the raw material n-heptanol; and aminating the obtained chloromethylated crosslinked polystyrene, so that the anion exchange resin is obtained. According to the invention, the security and environmental protection problems caused by the utilization of carcinogenic chloromethyl methyl ether used in traditional processes are solved; and the chloromethyl heptyl ether synthesized in the preparation process is converted into n-heptanol after the chloromethylation reaction is completed, and the n-heptanol can be used as a synthesized raw material for recycling, therefore, the production cost is reduced. The exchange capacity of the anion exchange resin provided by the invention can reach 2.5-3.4mmol / g (dry agent).

Description

technical field [0001] The invention relates to the technical field of production technology of anion exchange resins in functional polymer materials, in particular to a strongly basic styrene-based anion exchange resin and a preparation method thereof. Background technique [0002] Anion exchange resin is a polymer functional material that can selectively permeate anions, and is one of the important materials for industrial separation and purification. On the one hand, as an ion exchange material, it has many applications in wastewater treatment, chemical medicine, food manufacturing, etc. On the other hand, as a functional material, it has also been more and more widely used in the fields of catalysis, energy, and metal smelting. [0003] The anion exchange resin is prepared from styrene-divinylbenzene crosslinked polymer through chloromethylation and then amination. At present, chloromethyl ether is widely used as a chloromethylation reagent in the industry. Due to its ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F12/08C08F8/44C08F8/24B01J41/14
Inventor 何辛夏菲庄振东姚慧敏吴蓁
Owner SHANGHAI RESIN FACTORY
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