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:
Feb. 04, 1997
Filed:
Mar. 27, 1995
Andrew J Haddow, Cleveland, GB;
Tioxide Group Services Limited, London, GB;
Abstract
A novel process for the preparation of titanium dioxide comprises reacting titanium tetrachloride with oxygen at an elevated pressure and a temperature above 700.degree. C. The titanium tetrachloride is introduced into the reactor in at least two points and that portion introduced in the first inlet point is admixed with aluminium chloride and has been heated to a temperature of at least 450.degree. C. by utilizing the heat of reaction of aluminium and chlorine. The process provides an energy efficient method for producing titanium dioxide and avoids the need for auxiliary heating of the reactor by, for example, hydrocarbon combustion or electric discharge, which auxiliary heating can introduce impurities into the product titanium dioxide.