Method for regenerating anion exchange resin

An anion exchange column and exchange resin technology, applied in the field of ion exchange resin regeneration, can solve the problems of increased processing capacity, long regeneration cycle, and difficult elution of organic impurities, etc., to achieve increased processing capacity, improved regeneration exchange capacity, and resin The effect of long regeneration period

Inactive Publication Date: 2016-05-11
PURECIRCLE JIANGXI BIOTECH CO LTD
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  • Summary
  • Abstract
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  • Claims
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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the organic impurities adsorbed on the anion exchange resin in the production of stevioside are difficult to elute completely, and the regeneration exchange capacity of the resin is not large, and provide a regeneration method for the anion exchange resin, which overcomes the problems of the existing stevioside production. Insufficient anion exchange resin regeneration method greatly improves the regeneration exchange capacity of anion exchange resin, significantly increases the processing capacity, and the regeneration cycle is longer

Method used

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  • Method for regenerating anion exchange resin
  • Method for regenerating anion exchange resin

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Embodiment 1

[0021] Alcohol in the alcohol-alkali solution of this embodiment is an example of ethanol solution.

[0022] Under the temperature condition of 25°C, adopt wet packing method, put 300ml of anion exchange resin to be regenerated into a glass chromatography column, the ratio of diameter to height is 1:7, pass 3BV alcohol-alkali solution through the anion at a flow rate of 0.5BV / h For exchange resin, the concentration of sodium hydroxide in the alcohol-alkali solution is 2%, the concentration of ethanol is 70%, and washed with water until the pH is less than or equal to 9. Then, pass 2BV5% hydrochloric acid solution at 0.5BV / h, wash with water until pH ≥ 5, then pass 2BV5% sodium hydroxide solution into the anion exchange column at 0.5BV / h, wash with water until pH≤9, that is, anion The exchange resin regeneration is complete.

Embodiment 2

[0024] Alcohol in the alcohol-alkali solution of this embodiment is an example of ethanol solution.

[0025] Under the temperature condition of 25°C, use the wet method to pack the column, put 100ml of the anion exchange resin to be regenerated into the glass chromatography column, the diameter-to-height ratio is 1:4, and pass 2.5BV alcohol-alkali solution at a flow rate of 0.4BV / h Anion exchange resin, the concentration of sodium hydroxide in alcohol-alkali solution is 4%, the concentration of ethanol is 75%, washed with water until pH≤9. Then, pass through 2.5BV4% hydrochloric acid solution at 0.4BV / h, wash with water until pH ≥ 5, then pass 2.5BV4% sodium hydroxide solution into the anion exchange column at 0.4BV / h, wash with water until pH≤9, That is, the regeneration of the anion exchange resin is completed.

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Abstract

The invention relates to the field of ion exchange resin regeneration and provides a method for regenerating anion exchange resin. The method comprises the steps of putting the anion exchange resin to be regenerated into a glass chromatographic column at the temperature of 5-50 DEG C through a wet-process column packing method, wherein the diameter-height ratio is 1: 2-1: 8, making 0.5-8 BV of an alcohol-alkaline solution pass through an anion exchange column, conducting washing till PH is not higher than 9, then making 0.5-6 BV of a hydrochloric acid solution pass through the anion exchange column, conducting washing till PH is not lower than 5, finally, making 0.5-6 BV of a sodium hydroxide solution pass through the anion exchange column, and conducting washing till PH is not higher than 9, so that regeneration of the anion exchange resin is completed. By means of the method, defects of existing anion exchange resin regeneration methods in stevioside production are overcome, the regeneration exchange capacity of the anion exchange resin is greatly improved, the handling capacity is remarkably increased, and the regeneration cycle is longer.

Description

technical field [0001] The invention relates to the regeneration field of ion exchange resins, in particular to a regeneration method of anion exchange resins. Background technique [0002] Ion exchange resin is a kind of polymer compound with a network structure with functional groups. Its structure is composed of three parts: an insoluble three-dimensional space network skeleton, a functional group connected to the skeleton and the opposite of the functional group. Charge-exchangeable ions. Anion exchange resin is a kind of polymer with quaternary ammonium group, primary amino group, secondary amino group and tertiary amino group combined on the skeleton. [0003] Steviol glycoside is a new type of natural sweetener extracted from the Compositae herb stevia, which is widely used in the production of food, beverages and seasonings. In the purification process of steviol glycosides, anion exchange resins are commonly used for the purification and decolorization of steviosi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J49/00C07H15/256C07H1/06B01J49/57
CPCC07H15/256C07H1/06
Inventor 袁长荣廖春龙胡启胜肖娟谢芳余桂春明帮来郁军李善汪
Owner PURECIRCLE JIANGXI BIOTECH CO LTD
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