Patent ID: 8062622
Filing Date: 2011-11-22
Classification: C01G,C01P,C04B,Y02P

Abstract:
1. A method for the preparation of a crystalline titanium dioxide powder, comprising: introducing at a controlled rate for each stream, separate streams of titanium tetrachloride vapour; hydrogen, and air or oxygen-enriched air into a mixing chamber, igniting the mixture of titanium tetrachloride vapour, hydrogen and primary air in a burner; burning the flame into a reaction chamber; and separating from the gaseous substances, the solid TiO wherein the controlled rates are selected according to the equation: wherein A is a value of from 6-12 g/m TiCl H amount of air is the controlled rate for introducing air in units of kmol/h, total gas is the total controlled rate of all the gases in kmol/h, and BET is expressed in units of m wherein said crystalline titanium dioxide powder comprises: