Liquid purification or separation – Processes – Including controlling process in response to a sensed condition
Patent
1992-03-26
1993-05-04
Silverman, Stanley S.
Liquid purification or separation
Processes
Including controlling process in response to a sensed condition
210759, 210763, 210904, C02F 172
Patent
active
052079252
ABSTRACT:
A process is disclosed for the detoxification of aqueous solutions containing cyanides and/or cyano complexes in the presence of heavy metals which are Mn, Co, Ni, Cu, Cd and Zn, more particularly Cu, by oxidative treatment of the solutions with peroxide compounds at pH values of 8 to 12. Peroxide compounds from the group consisting of alkali metal percarbonates and alkaline earth metal peroxides are used. The peroxide compounds are added to the solutions to be detoxified per se or are formed in situ therein from hydrogen peroxide and other components. Sodium perborate, sodium percarbonate and calcium peroxide are preferred.
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Diehl Manfred
Gos Stephen
Ladwig Frank
Steiner Norbert
Degussa - Aktiengesellschaft
McCarthy Neil M.
Silverman Stanley S.
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