METHOD FOR PREPARING TITANIUM DIOXIDE PARTICLES WITH PIGMENT PROPERTIES WITH A PREFERRED PARTICLE SIZE.

摘要

Method for producing pigment quality titanium dioxide of controlled particle size by reacting gaseous titanium tetrachloride with an oxygen-containing gas in a reactor having a cylindrical duct, a coaxial cylindrical reaction chamber of diameter greater than the diameter of the duct and spaced below the duct and a frusto-conical divergent duct connecting the cylindrical duct to the reaction chamber, wherein the oxygen-containing gas is introduced through the cylindrical duct and the titanium tetrachloride is introduced into the frusto-conical section of the reactor at a variably selectable location therein.