The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 19, 1994
Filed:
Apr. 26, 1993
Dominic G Meina, Strathclyde, GB;
Tioxide Specialties Limited, London, GB;
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.