Process for producing alumina and ferric oxide from...

Details Process for producing alumina and ferric oxide from... Process for producing alumina and ferric oxide from...

C - Chemistry, Metallurgy

01

F

23/245, 23/267

C01F 7/22 (2006.01)

Patent

CA 1176430

The invention concerns a process for the preparation of alumine and ferric oxide from low-grade aluminium and iron carriers. The processes, in addition to conventional technological steps, comprises the steps of dissolving the iron content of a ground, mineral material in an aqueous hydrochloric acid solution containing 200 to 420 g./lit. of hydrochloride acid at 90 to 130°C, eliminating the iron from the slurry of from a solution obtained by filtration of the slurry, with an anion exchange resin or semipermeable membrane or cloth, continuously or discontinuously, eluting the iron from the ion exchange resin and recycling hydrochloric acid and sulfuric acid in a closed system.

374969

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