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US 4,394,366 AGranted
Process for production of CoCl.sub.2 solution from cobaltic oxide-hydrate
AssigneeInco Limited
InventorsVictor A. Ettel, Eric A. Devuyst, Alexander Illis
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AssigneeInco Limited
InventorsVictor A. Ettel, Eric A. Devuyst, Alexander Illis
Estimating the term…
This invention is concerned with a process for dissolving oxidic trivalent cobalt compounds in hydrochloric acid 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 from the group consisting of 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.
A process for producing cobaltous chloride from cobaltic hydroxide while avoiding the generation of chlorine which comprises slurrying in water cobaltic hydroxide to be dissolved and treating the resulting slurry with a reducing agent from the group consisting of methanol, formaldehyde and formic acid and with hydrochloric acid such that the contact of said acid with said slurry occurs in the presence of said reducing agent and the rate of said acid addition is controlled to maintain the slurry at a pH above 1.
Dependencies are inferred from the claim text.