C - Chemistry – Metallurgy – 01 – G
Patent
C - Chemistry, Metallurgy
01
G
23/262, 23/85
C01G 23/00 (2006.01) C01G 23/053 (2006.01) C22B 34/12 (2006.01)
Patent
CA 1157229
ABSTRACT A process is provided for the manufacture of titanium compounds and particularly titanium dioxide wherein excess titaniferous bearing material is reacted with dilute sulfuric acid having a concentration of between about 25% and about 60% by weight at a temperature below about 140°C, and in the presence of a reducing agent which affects the reduction of ferric iron to ferrous iron. Thereafter, the titanium sulfate may be recovered or further processed to provide titanium dioxide hydrate accompanied by recycling the spent acid for reaction with the titaniferous bearing material charged to the process. The titanium hydrate may be calcined to provide titanium dioxide.
357838
Cole Donald G.
Rahm Joseph A.
Kirby Eades Gale Baker
Nl Industries Inc.
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