| 摘要 |
<p>The invention relates to a process for the treatment of iron- and zinc-containing spent hydrochloric acid solutions by liquid-liquid extraction wherein for the separation 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 additions of metallic iron and zinc.</p> |
