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Preparation method of anion exchange resin

An exchange resin and anion technology, which is applied in the field of anion exchange resin preparation, can solve the problems of low chlorine content in benzyl chloride balls, achieve the effects of increasing chlorine content, good reaction effect, and guaranteed density

Pending Publication Date: 2021-06-25
KAIRUI ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it will still be found in actual production that the chlorine content of the prepared benzyl chloride spheres will be relatively low

Method used

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  • Preparation method of anion exchange resin
  • Preparation method of anion exchange resin
  • Preparation method of anion exchange resin

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preparation example Construction

[0031] A preparation method of anion exchange resin, comprising the following steps:

[0032] S1. Add D301 white balls to the reactor and heat to 40°C;

[0033] S2, adding chloromethyl ether solution, modified porogen and modified catalyst in the reactor;

[0034] S3, after soaking for 2 hours, start to feed continuously, finish feeding after 12 hours, and start to react;

[0035] S4, after the reaction is finished, the material is washed with dilute hydrochloric acid, washed with water twice until the pH is neutral, and benzyl chloride spheres are obtained and analyzed for chlorine content;

[0036] Among them, the amount of D301 white balls is 40-100g, the amount of chloromethyl ether solution is 180-250g, the modified porogen is 30-60g, the modified catalyst is 30-60g, and the chloromethyl ether solution in S2 can also be dichloroethane solution instead.

[0037] The modified catalyst is prepared from anhydrous ferric chloride and a composite phosphate stabilizer. The pr...

Embodiment 1

[0043] A preparation method of anion exchange resin, comprising the following steps:

[0044] S1. Add 40g of D301 white balls to the reactor and heat to 40°C;

[0045] S2, add 180g chloromethyl ether solution, 30g modified porogen and 30g modified catalyst in reactor;

[0046] S3, after soaking for 2 hours, start to feed continuously, finish feeding after 12 hours, and start to react;

[0047] S4. After the reaction is finished, the material is washed with dilute hydrochloric acid, and washed twice until the pH is neutral to obtain benzyl chloride spheres, which are analyzed for chlorine content.

Embodiment 2

[0049] A preparation method of anion exchange resin, comprising the following steps:

[0050] S1. Add 60g of D301 white balls into the reactor and heat to 40°C;

[0051] S2, add 215g chloromethyl ether solution, 40g modified porogen and 40g modified catalyst in reactor;

[0052] S3, after soaking for 2 hours, start to feed continuously, finish feeding after 12 hours, and start to react;

[0053] S4. After the reaction is finished, the material is washed with dilute hydrochloric acid, and washed twice until the pH is neutral to obtain benzyl chloride spheres, which are analyzed for chlorine content.

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Abstract

The invention relates to the technical field of exchange resin preparation, in particular to a preparation method of anion exchange resin, which comprises the following steps of: S1, adding D301 white balls into a reaction kettle, and heating to 40 DEG C; S2, adding a chloromethyl ether solution, a modified pore-foaming agent and a modified catalyst into the reaction kettle; S3, after soaking for 2 hours, starting continuous feeding, finishing feeding after 11-13 hours, and starting to react; and S4, after the reaction is finished, washing the material with diluted hydrochloric acid until the pH is neutral to obtain benzyl chloride balls, and analyzing the chlorine content of the benzyl chloride balls. In the preparation process, the modified catalyst and the modified pore-foaming agent are added, so that on one hand, pore cavities can be formed in the resin to improve the reaction effect of materials in the pore cavities, and on the other hand, the stability of the catalyst anhydrous ferric chloride can be stabilized to enable the anhydrous ferric chloride not to be easily hydrolyzed, thereby effectively improving the chlorine content of the product.

Description

technical field [0001] The invention relates to the technical field of exchange resin preparation, in particular to a preparation method of anion exchange resin. Background technique [0002] The production process of benzyl chloride spheres that have been reported so far all adopts a tank reactor, and the one with the highest chlorine content is the chlorosulfonic acid method using D301 white spheres, and its chlorine content reaches 20.5%. In many years of production practice, it can be found that the use of tank reactors not only causes serious equipment corrosion, but also the problem of equipment sealing is difficult to solve. [0003] A new process developed in recent years uses chloromethyl ether as a chloromethylation reagent. Although the chlorine content has increased, the industrial application of this process has been limited due to the carcinogenicity of the material. In addition, since the boiling point of methanol produced by the reaction is higher than that ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J41/12
CPCB01J41/12
Inventor 毛进池董研张美娟郭为磊
Owner KAIRUI ENVIRONMENTAL PROTECTION TECH
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