Zero-discharge production process for potassium perchlorate

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The traditional process for producing potassium perchlorate through double displacement using potassium chloride faces a problem: the by-product of this reaction, sodium chloride, contains perchlorates. If such sodium chloride is used in electrolysis to produce sodium chlorate, it can damage the anode coating of the electrolytic cell. This has been a challenge throughout the history of perchlorate and chlorate production. The environmental issue posed by the discharge of the mother liquor resulting from this double displacement process into water bodies has not yet been effectively resolved. In contrast, the new process for producing potassium perchlorate via double displacement generates sodium chlorate as its by-product, which can be recycled back to the electrolytic cell used for producing perchlorate. The electrolytes involved—sodium chlorate and perchlorate—are stored in different types of cells, and the electrode materials also differ. This approach technically separates the solution systems used for producing sodium chlorate from those used for producing perchlorate, thereby avoiding damage to the anodes of the electrolytic cells used for sodium chlorate production. It represents an innovative technological advancement.