Ion exchange resin regeneration method

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...

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 easy to be eluted, which will lead to the operation High pressure, large amount of eluent, low concentration of the target product in the collected liquid, long operation cycle, incomplete elution of the molecules of the target product adsorbed by the resin in the agglomerate, low yield, etc., the column efficiency of the ion exchange column is large Affected, and easy crossover between products leads to reduction of yield and product quality, high production cost, and is not conducive to environmental protection