Preparation of anatase titanium dioxide

Details Preparation of anatase titanium dioxide Preparation of anatase titanium dioxide

C - Chemistry, Metallurgy

01

G

C01G 23/047 (2006.01) B01J 21/06 (2006.01) B01J 37/02 (2006.01) C01G 23/053 (2006.01) C09C 1/36 (2006.01)

Patent

CA 2094299

ABSTRACT OF THE DISCLOSURE PREPARATION OF ANATASE TITANIUM DIOXIDE A process for the preparation of anatase titanium dioxide having a high surface area and suitable as a catalyst support is described. The process involves forming an aqueous dispersion of titanium dioxide at pH less than 3 and preferably less than 1 and depositing a first coating of a hydrous oxide of an element which acts as a rutilisation inhibitor and a second coating of a phosphate on the particles of titanium dioxide. The product of the process has a high surface area which is retained on heating for long periods at high temperature. A novel product is particulate anatase titanium dioxide which has been coated with a rutile inhibitor and a phosphate, has a specific surface area of at least 50 m2/g and retains at least 80% of its surface area after heating at 800°C for 7 days.

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