Ion exchange resin regeneration method

An ion exchange resin and exchange resin technology, applied in ion exchange regeneration, ion exchange, ion exchange bed cleaning/flushing, etc., can solve the problems of low concentration of target products, long operation cycle, high production cost, etc., and achieve resin pressure Agglomeration, reduced production cost, and short operating cycle

Inactive Publication Date: 2008-07-23
张剑秋 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the separation of the ion exchange column means that the charged substances are distributed between the stationary phase and the mobile phase due to the force of the charge to be separated from each other. Full contact between the two phases is a necessary condition to ensure the effect. During the operation, the gaps between the agglomerates have relatively small resistance to the fluid, and the mobile phase is easier to pass through, so that the molecules adsorbed by the resin in the agglomerate are not e

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] with common H + Taking the regeneration of type cation exchange resin as an example, the following steps are used to regenerate it:

[0022] First, water is passed into the ion exchange column containing the used cation exchange resin, and the resin is backflushed to remove suspended impurities. Then flow into a certain amount of 1N-2N sodium hydroxide solution. According to actual needs, soak for 0.5-24 hours. After the impurity ions adsorbed on the resin are precipitated and removed, continue to wash the resin with water in a downstream direction. Enter the flow rate of the hydrochloric acid solution to make the ion exchange resin slightly fluidized, soak for 0.5-24 hours, add water to wash the resin along or countercurrent until the effluent is close to neutral, and the regeneration of the ion exchange resin is completed.

[0023] When using the above-mentioned ion exchange column to separate the nucleotides in the nucleotide enzymolysis solution in the enzymatic p...

Embodiment 2

[0025] in common OH - Anion exchange resin, for example, can be regenerated using the following steps:

[0026] First, water is passed into the ion exchange column equipped with the used anion exchange resin, and the resin is backflushed to remove suspended impurities; then a certain amount of 1N-2N hydrochloric acid solution is added downstream. Soak for 0.5-24 hours, after the impurity ions adsorbed on the resin are precipitated and removed, continue to wash the resin with water, until the effluent is close to neutral, start adding a certain amount of 1N-2N sodium hydroxide solution in countercurrent, and properly control the introduction of sodium hydroxide The flow rate of the solution makes the ion-exchange resin slightly fluidized, soaked for 0.5-24 hours, and washes the resin with water flowing or counter-currently, until the water is nearly neutral, the regeneration of the ion-exchange resin is completed, and it is ready for use.

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PUM

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Abstract

The invention relates to a regeneration method for an ion exchange resin, wherein, the ion exchange resin includes a cation exchange resin and an anion exchange resin. The method mainly comprises two steps that: a desorption solution is introduced into an ion exchange column containing ion exchange resin for removing the impurity ions absorbed on or firmly combined with the resin; a regeneration solution counter current is introduced into the ion exchange column for restoring the ion exchange ability of the ion exchange resin. The desorption solution and the regeneration solution adopts forward current and counter current modes respectively to be introduced into the ion exchange column one after another. By adopting the combining mode of forward and counter currents, the regenerated ion exchange resin can be effectively dispersed and equally dispersed in the ion exchange column, thus improving the column efficiency of the column exchange column and good for environment at the same time of reducing energy consumption and production cost.

Description

technical field [0001] The invention relates to a method for regenerating ion-exchange resin after ion-exchange columns are used to separate products in the production process of chemical, biochemical and pharmaceutical products. Background technique [0002] Ion exchange resins are widely used in the production process of chemical, biochemical and pharmaceutical products to extract and refine compounds. The repeated regeneration of ion exchange resins is one of the main advantages of ion exchange resins being widely used in industrial production. [0003] The regeneration of the ion exchange resin mainly refers to the process of passing the regeneration solution into the ion exchange column containing the used ion exchange resin to restore the ion exchange capacity of the resin. Usually, in order to achieve a better regeneration effect, after the suspended impurities remaining on the resin are washed away with water and before the regeneration solution is introduced, the a...

Claims

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Application Information

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IPC IPC(8): B01J49/00B01J49/60
Inventor 张剑秋张复兴
Owner 张剑秋
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