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PROCESS FOR METALS RECOVERY WITH SIMULTANEOUS NEUTRALIZATION OF TOXIC AQUEOUS WASTES,CONCENTRATED PLATING SOLUTION AND TOXIC VAPOURS IN VENTILATION SYSTEMS AND APPARATUS THEREFOR
PROCESS FOR METALS RECOVERY WITH SIMULTANEOUS NEUTRALIZATION OF TOXIC AQUEOUS WASTES,CONCENTRATED PLATING SOLUTION AND TOXIC VAPOURS IN VENTILATION SYSTEMS AND APPARATUS THEREFOR
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机译:通风系统中同时进行中毒有毒废水,浓缩镀液和有毒蒸气的金属中和的金属回收工艺及其装置
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摘要
Method for recovering metals from cyanide and hexavalent chromium plating baths comprising immersing plated articles in a reclaiming bath containing an aldehyde or an aldehyde percursor, and optionally an oxidizing agent, to precipitate the excess metal in the residual plating bath in the form of free metal or metal hydroxide and to decompose the cyanide and to reduce the hexavalent chromium to trivalent chromium. The plating bath and reclaiming bath are regenerated. Apparatus is provided to effect this process.
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