Process for the production of high-grade titanium dioxide by...

Details Process for the production of high-grade titanium dioxide by... Process for the production of high-grade titanium dioxide by...

C - Chemistry, Metallurgy

01

G

23/261

C01G 23/053 (2006.01) C01G 23/00 (2006.01) C22B 3/38 (2006.01) C22B 34/12 (2006.01)

Patent

CA 1313584

PROCESS FOR THE PRODUCTION OF HIGH-GRADE TITANIUM DIOXIDE BY THE SULFATE METHOD ABSTRACT OF THE DISCLOSURE High-grade titanium dioxide is produced by a) reacting ilmenite or titanium-containing slag with sulfuric acid, b) dissolving the material from a) with water or dilute sulfuric acid, c) separating insolubles from b) to obtain a black solution containing titanyl sulfate and foreign metal salts, extracting titanyl sulfate from the black liquor with sulfuric acid and an organic medium containing an organo- phosphorus compound, separating the foreign metal salts in an aqueous extract phase, recovering titanyl sulfate from the organic extract phase, and d) hydrolyzing the titanyl sulfate to titanium oxide hydrate. Le A 23 773

512990

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