Allied Corporation

John I Choi

Bruce E Kurtz

Anatoli Omelian

James F Walther

A process of preparing chromium (III) compounds from chromate and/or dichromate salts by forming a mixture of such salts, an acid, water and a reducing agent. Additional acid is added to the mixture which is then cooled selectively precipitating the salt of the anion of the acid and the cation of the chromate and/or dichromate salts which is separated from the solution containing the desired chromium (III) compound.

Production of chromium (III) compounds

A process for the recovery of soluble alumina values from alumina-bearing ores comprising simultaneously contacting a stream containing an effective amount of a reducing agent such as SO.sub.2 and a stream containing an effective amount of an oxidizing agent such as Cl.sub.2 with an aqueous slurry of the alumina-bearing ores for a time sufficient to remove at least about 50 weight percent of the soluble alumina values from said ores is disclosed.

Growing community of inventors

Camillus, NY, United States of America

John I Choi