Process for recovering metal from cyanide-containing waste waters

摘要

The present invention relates to a process for the oxidation of a liquid which contains cyanide and soluble metal ions using an oxygen-containing gas. An example of such a liquid is the waste water which is generated during a metal-treatment process. The disclosed process not only removes the cyanide completely but also converts the metal dissolved in the liquid into granular metal oxides which can easily be recovered.