A process of producing cobalt (II) chloride.

摘要

This invention is concerned with a process for dissolving oxidic trivalent cobalt compounds in hydrochloric acid to produce cobalt (II) chloride while avoiding the generation of chlorine. It includes the following steps (a) slurrying in water the trivalent cobalt compound to be dissolved and (b) treating the resulting slurry with a reduction agent preferably methanol, formaldehyde and formic acid and with hydrochloric acid. The contact of the hydrochloric acid with the slurry should occur in the presence of the reducing agent. The rate of acid addition should be controlled to maintain the slurry at a pH above 1.