Process for reducing the cyanide content of a solution

Details Process for reducing the cyanide content of a solution Process for reducing the cyanide content of a solution

C - Chemistry, Metallurgy

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362/44

C02F 1/58 (2006.01) C02F 1/20 (2006.01) C02F 1/66 (2006.01) C02F 1/74 (2006.01) C02F 1/76 (2006.01) C02F 9/00 (2006.01)

Patent

CA 2035880

ABSTRACT OF THE DISCLOSURE A process for treatment of waste aqueous process streams from industrial processes containing both cyanide ions and dissolved ammonia to reduce the cyanide content, comprising the consecutive steps: (a) adding a halogenating agent to the solution while maintaining the pH of the solution at greater than 7; (b) removing ammonia from the solution by aeration; (c) acidifying the solution to a pH of less than 7; (d) substantially neutralising the solution; and (e) removing the ammonia from the solution by aeration.

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