Working up aqueous titanium dioxide hydrate suspensions

Details Working up aqueous titanium dioxide hydrate suspensions Working up aqueous titanium dioxide hydrate suspensions

C - Chemistry, Metallurgy

01

G

182/19, 23/255

C01G 23/04 (2006.01) C01G 23/047 (2006.01)

Patent

CA 1072885

Bayer 2626 WORKING UP AQUEOUS TITANIUM DIOXIDE HYDRATE SUSPENSIONS Abstract of the Disclosure In the recovery of titanium dioxide by subjecting an aqueous titanium dioxide hydrate suspension to at least one stage of filtering and washing to form a washed filter cake, adjusting the composition and calcining the adjusted and washed filter cake, the improvement which comprises filtering the aqueous titanium dioxide hydrate suspension under a pressure of about l bar to 16 bars to form a homogeneous substantially crack-free filter cake of a thickness of about 10 to 25 mm. Advantageously a membrane filter is employed, and washing is effected under a pressure of 1 to 16 bars and a liquid flow rate of 0.1 to 1 m/h to produce a filter cake having a solids content of at least 45 % by weight. Le A 15 672

226911

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