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Method for regenerating ion exchange resin based on fluidized bed

An ion exchange resin, fluidized bed technology, applied in ion exchange regeneration, ion exchange, ion exchange bed cleaning/flushing, etc., can solve the problems of low regeneration efficiency, insufficient desorption of impurities, etc., to achieve reduced consumption and good promotion Application space, effect of reducing emissions

Inactive Publication Date: 2014-02-05
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the high material consumption, energy consumption and environmental protection pressure caused by the insufficient desorption of impurities in the regeneration method of the existing ion exchange resin, the low regeneration efficiency, and the need for frequent regeneration of the resin bed, the invention discloses a flow-based The regeneration method of the ion exchange resin of the chemical bed, through the implementation of the regeneration method, the regeneration efficiency of the ion exchange resin can be improved, the switching period of the ion exchange resin can be extended by more than 25%, and the consumption of acid, alkali and process water can be reduced by 20% Above, while reducing material consumption and energy consumption, waste water discharge is reduced, which has obvious economic and environmental benefits

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (a) Add process water from the top of the ion exchange tower to be regenerated, and wash it through the ion exchange resin bed until the caprolactam content in the tower water is lower than 0.3 (wt)%.

[0031] (b) Add process water from the bottom of the tower to backwash the ion exchange resin treated in (a), and control the water volume of the cation exchange tower to 35m 3 / h, the water volume of the anion exchange tower is controlled to 30m 3 / h, a stable fluidized bed is formed, and the flushing ends after 3 hours.

[0032] (c) Add the analysis solution from the bottom of the tower to analyze the ion exchange resin treated in (b), add 4 (wt)% sodium hydroxide aqueous solution to the cation exchange tower, and control the flow rate to 35m 3 / h; 4% (wt) nitric acid solution is added to the anion exchange tower, and the flow control is 30m 3 / h. The ion exchange resin beds in the two towers are in a stable fluidized state. After 3 hours of analysis, process water i...

Embodiment 2

[0035] The difference between this embodiment and Embodiment 1 is that step (a) is not performed.

Embodiment 3

[0037] The difference between this embodiment and Example 1 is that the nitric acid solution in steps (c) and (d) is replaced by hydrochloric acid solution.

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Abstract

The invention relates to a method for regenerating an ion exchange resin based on a fluidized bed, and in particular relates to a method for regenerating ion exchange resin, which forms the fluidized bed from analytical liquid, regenerating liquid, cleaning liquid and ion exchange resin in a caprolactam production process to improve the regeneration efficiency and reduce cost. Compared with the prior art, the method can prolong the switching period of an ion exchange resin tower, reduce material and energy consumption, and reduce the emission quantity of wastewater. By implementing the method, the ion exchange resin tower need not to be transformed, the operation is simple and practical, and the economical and environment-friendly benefits are remarkable. The method has a good popularization and application space.

Description

Technical field [0001] The present invention involves a recycling method based on fluidized bed ion exchange resin, and specially involves a resolution solution, regeneration solution and cleaning solution and ionic resin forming a fluidized bed in the production process of the production process of the ionic recycled efficiency and reduction of costs.Resin regeneration method. Background technique [0002] Ion exchange resin is widely used in the production process of chemical, medicine, biochemistry, etc. It can be used to remove salt impurities in mixed solutions and adsorb part of organic impurities.However, after a period of use of ion exchange resin, due to ion exchange ability or adsorption of organic matter to achieve saturation, it is necessary to cut out the system for regeneration. [0003] In the current recycling method of ion exchanging resin use, the analysis solution, regeneration solution, and cleaning solution are mainly added from top to bottom through the top ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J49/00B01J49/60
Inventor 左华亮李兴栋严实王文彬范壮志
Owner CHINA PETROLEUM & CHEM CORP
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