Process for the treatment of iron- and zinc- containing...

Details Process for the treatment of iron- and zinc- containing... Process for the treatment of iron- and zinc- containing...

C - Chemistry, Metallurgy

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C23G 1/36 (2006.01) C01G 9/00 (2006.01) C01G 9/04 (2006.01) C01G 49/00 (2006.01) C01G 49/10 (2006.01) C22B 3/44 (2006.01)

Patent

CA 1250210

ABSTRACT The invention relates to a process for the treat- ment of iron- and zinc-containing spent hydrochloric acid solutions by liquid-liquid extraction wherein for the sepa- ration of iron and zinc the iron present in the pickles in bi- and trivalent form is converted completely to bivalent iron through a preceding reduction, the zinc is extracted with organic solvents containing complexing agents, and the phases containing iron and zinc are treated conventionally after reextraction. The trivalent iron is then reduced to the +2 oxidation state in two stages through successive addi- tions of metallic iron and zinc.

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