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Preparation method of modified macroporous styrene-divinylbenzene anion exchange resin

A technology based on styrene-divinylbenzene resin and styrene-divinyl, which is applied in the field of preparation of modified macroporous styrene-divinylbenzene anion exchange resin, can solve problems such as environmental pollution, achieve low environmental pollution, low cost, The effect of simple reaction process

Inactive Publication Date: 2020-04-10
JIANGSU XINLU CHEM NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing technology is to use chloromethyl methyl ether as a methylation reagent to carry out amination reaction to obtain a weakly basic anion resin. Since chloromethyl methyl ether is a highly toxic compound, the production process is very easy to pollute the environment.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] Example 1: In a four-necked reaction flask equipped with an electric stirrer, a reflux condenser and a thermometer, 36.6 g of phthalamido styrene divinylbenzene resin, 8.0 g of sodium hydroxide, 0.5 g of Catalyst, 30g solvent, 15g water. A condenser tube and a thermometer were installed, and the stirrer was started. When the temperature was raised to 70 °C, the timing was started, and the reaction time was 11 h. After the reaction is completed, the temperature is lowered to 40°C, the solid-liquid mixture is filtered and separated, and the separated macroporous styrene divinylbenzene anion resin is washed twice with clean water to obtain a modified macroporous cationic styrene divinylbenzene anion resin product. , the amine functional group content of the prepared modified macroporous styrene divinylbenzene anion exchange resin is 2.4 mmol / g.

Embodiment 2

[0010] Example 2: In a four-necked reaction flask equipped with an electric stirrer, a reflux condenser and a thermometer, 36.6 g of phthalamido styrene divinylbenzene resin, 8.5 g of sodium hydroxide, 0.8 g of Catalyst, 40g solvent, 20g water. A condenser tube and a thermometer were installed, and the stirrer was started. When the temperature was raised to 70 °C, the timing was started, and the reaction time was 11 h. After the reaction is completed, the temperature is lowered to 40°C, the solid-liquid mixture is filtered and separated, and the separated macroporous styrene divinylbenzene anion resin is washed twice with clean water to obtain a modified macroporous cationic styrene divinylbenzene anion resin product. , the amine functional group content of the prepared modified macroporous styrene divinylbenzene anion exchange resin is 6.5 mmol / g.

Embodiment 3

[0011] Example 3: In a four-necked reaction flask equipped with an electric stirrer, a reflux condenser and a thermometer, 36.6 g of phthalamido styrene divinylbenzene resin, 8.5 g of sodium hydroxide, 1.0 g of Catalyst, 40g solvent, 25g water. A condenser tube and a thermometer were installed, and the stirrer was started. When the temperature was raised to 70 °C, the timing was started, and the reaction time was 11 h. After the reaction is completed, the temperature is lowered to 40°C, the solid-liquid mixture is filtered and separated, and the separated macroporous styrene divinylbenzene anion resin is washed twice with clean water to obtain a modified macroporous cationic styrene divinylbenzene anion resin product. , the amine functional group content of the prepared modified macroporous styrene divinylbenzene anion exchange resin is 4.4 mmol / g.

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PUM

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Abstract

The invention discloses a preparation method of modified macroporous styrene-divinylbenzene anion exchange resin. Phthalimido styrene-divinylbenzene resin and sodium hydroxide which are used as raw materials are reacted in the presence of a catalyst and a solvent to obtain the modified macroporous styrene-divinylbenzene anion exchange resin. The amino functional group content of the modified macroporous styrene-divinylbenzene anion exchange resin prepared by the method is 2.4-6.5 mmol / g, and the method has the advantages of simple reaction process, short time, low energy consumption, small environmental pollution and low cost, and is an ideal process for realizing industrial production.

Description

technical field [0001] The invention relates to a preparation method of a modified macroporous styrene divinylbenzene anion exchange resin. Background technique [0002] In general, weakly basic anion resin molecules contain multiple -NH 2 The group, the positively charged group contained in the resin body in the solution, can combine with other anions in the solution to form a salt to achieve the purpose of purification or separation. In the prior art, chloromethyl methyl ether is used as a methylating reagent to carry out an amination reaction to obtain a weakly basic anion resin. Since chloromethyl methyl ether is a highly toxic compound, the production process is very likely to cause pollution to the environment. SUMMARY OF THE INVENTION [0003] In order to solve the above technical problems, the present invention provides a method for preparing a modified macroporous styrene divinylbenzene anion exchange resin. The reaction is carried out in the presence of a solve...

Claims

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Application Information

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IPC IPC(8): B01J41/07B01J41/09
CPCB01J41/09B01J41/07
Inventor 孙敬元王树清郑建
Owner JIANGSU XINLU CHEM NEW MATERIAL
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