Method for preparing potassium perborate by recovering sodium perborate mother liquor through modified potassium resin

High-purity potassium perborate was prepared by ion exchange of sodium perborate mother liquor with crown ether modified potassium resin, which solved the problems of low hydrogen peroxide utilization and high cost in the existing technology, and achieved efficient recovery of waste liquid resources and high product stability.

CN122126802APending Publication Date: 2026-06-02浙江洁华新材料股份有限公司
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Patent Information

Application Number
CN202610105829.0
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-01-27
Publication Date
2026-06-02

AI Technical Summary

Technical Problem

Existing industrial methods for producing potassium perborate suffer from problems such as low hydrogen peroxide utilization, generation of high-salinity wastewater, and high costs, and fail to effectively recover the high-value components in sodium perborate mother liquor.

Method used

High-purity potassium perborate was prepared by ion exchange of sodium perborate mother liquor with crown ether modified potassium resin, through a mild ion exchange and crystallization process, avoiding severe peroxidation reaction and directly utilizing the boron and active oxygen components in the mother liquor.

Benefits of technology

This method achieves efficient recovery of boron and active oxygen components from mother liquor, reduces production costs, produces high-purity, high-stability potassium perborate, avoids the generation of high-salt wastewater, and is simple and easy to industrialize.

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Abstract

The invention discloses a method for preparing potassium perborate by recovering sodium perborate mother liquor through modified potassium resin, and belongs to the technical field of comprehensive utilization of resources. The method comprises the following steps: converting 732 type strong acid cation exchange resin into potassium type through pretreatment, and modifying by using a 15-crown ether-5 ethanol solution to obtain crown ether modified potassium type resin; enabling a sodium perborate mother solution to flow through an exchange column filled with the resin, carrying out ion exchange at the temperature of 20-30 DEG C, and efficiently replacing Na ions in the mother solution with K ions in the resin by utilizing specific selection of crown ether on sodium ions, so as to obtain a pure potassium perborate solution; and cooling and crystallizing the solution at-5-5 DEG C, separating and drying to obtain the high-purity potassium perborate product. The waste mother liquor is directly used as the raw material, the process is mild, the active oxygen content of the product is high (gt; 16%), the particles are uniform, the stability is good, the problems of high cost, heavy pollution and poor product quality of the traditional process are solved, and the green and high-value utilization of waste resources is realized.
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