Mauriel Kapouytian Woods LLP
Process for recycling chromium from waste water containing hexavalent chromium
A process for recovering chromium from hexavalent chromium-containing wastewater comprises the following steps: (1) extracting hexavalent chromium in wastewater to an organic phase by using an extracting agent, and separating hexavalent chromium from a water phase, so as to acquire a hexavalent chromium-loaded organic phase; (2) reducing the hexavalent chromium-loaded organic phase by using an aqueous solution of an organic reducing agent, reducing hexavalent chromium into trivalent chromium, reversely extracting trivalent chromium into the water phase, and separating the organic phase from the water phase to acquire a solution of the trivalent chromium and a renewable organic phase, wherein the organic reducing agent is one or a mixture of alcohols, aldehydes and carboxylic acids having the carbon atom number ranging 1 to 3; and (3) performing solvent evaporation on the solution of trivalent chromium, catalyzing, and recovering the trivalent chromium.
HUNAN YONKER ENVIRONMENTAL PROTECTION RESEARCH INSTITUTE CO., LTD
C Y C C C C C C C C C
C22B Y02P C02F C22B C22B C22B C22B C01G C22B C02F C22B
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Bao Xiongjie Jie Leshan Biyu Yongge Qunhuan Qianfeng Haiyan
Liu Que Liu Song Sun Yao Cai He Yan