PRODUCTION OF TITANIUM DIOXIDE Russian patent published in 2008 - IPC C22B34/12 C22B3/08 C01G23/53 

FIELD: sulfate method of production of titanium dioxide from titanium-containing material.

SUBSTANCE: proposed method includes leaching-out of titanium-containing material by sulfuric acid solution, thus obtaining lye containing titanyl sulfate, separation of titanyl sulfate from lye, hydrolysis of titanyl sulfate for forming solid phase containing hydrated titanium oxides followed by roasting the solid phase obtained at the hydrolysis stage. Proposed method includes additional leaching-out stage for leaching-out of solid phase remaining after leaching-out of initial titanium-containing material by means of solution containing sulfuric acid.

EFFECT: enhanced efficiency of process.

24 cl, 2 dwg, 9 tbl, 13 ex