Improved process for the extraction of titanium dioxide and vanadium salts from bauxite

摘要

The residues from the treatment of certain bauxites by the Bayer process are treated for the production of titanium dioxide and vanadium compounds. The residues, after washing, are dissolved in hydrochloric acid to yield a solution containing about 100 grm. titanium chloride per litre. Any considerable excess of acid is then neutralized, the iron is reduced, and alkali acetate added to the solution in amount equal to one-tenth of the titanium chloride present. The solution is boiled to precipitate titanium dioxide, and almost completely neutralized. The filtrate is treated with barium salts to precipitate barium vanadate, which may be used in the preparation of other vanadium compounds.