Preparation of anatase titanium dioxide

Details Preparation of anatase titanium dioxide Preparation of anatase titanium dioxide

1993-04-26

1994-07-19

Langel, Wayne

Catalyst, solid sorbent, or support therefor: product or process

Catalyst or precursor therefor

Phosphorus or compound containing same

106430, 106436, 106438, 106443, 502214, B01J 2718, B01J 2782

Patent

active

053309537

ABSTRACT:
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 a 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 m.sup.2 /g and retains at least 80% of its surface area after heating at 800.degree. C. for 7 days.

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