Patent ID: 7476378
Filing Date: 2009-01-13
Classification: C01G,C01P,C09C

Abstract:
1. A process for producing titanium dioxide, comprising: a) providing a quantity of liquid titanium tetrahalide for reacting with an oxygen-containing gas; b) vaporizing a first portion of the liquid titanium tetrahalide and reacting the titanium tetrahalide vapor and the oxygen-containing gas, in a first stage of a reaction zone, the reaction zone temperature being sufficient to form a reaction product at least containing titanium dioxide and oxygen-containing gas and passing the reaction product to at least one additional stage of the reaction zone; and c) charging at least one additional portion of the liquid titanium tetrahalide directly into the at least one additional stage of the reaction zone at a temperature below the boiling point of the titanium tetrahalide, at the charge pressure of the titanium tetrahalide, to cool the titanium dioxide and to react with the oxygen-containing gas to form additional titanium dioxide, under conditions sufficient to form a product substantially free of titanium tetrahalide.