Process for preparing titanium dioxide

Details Process for preparing titanium dioxide Process for preparing titanium dioxide

1988-05-23

1993-04-20

Lewis, Michael

Chemistry of inorganic compounds

Oxygen or compound thereof

Metal containing

106437, C01G 2304

Patent

active

052040836

ABSTRACT:
An improved method for preparing a rutile titanium dioxide pigment of uniform particle size wherein the pigment is formed by reaction of a mixture of an oxidizing gas and a titanium halide in the vapor phase at elevated temperatures in the presence of a metal ion containing compound. The improvement comprises introducing the metal ion containing compound into a vapor phase oxidation reactor containing the reacting mixture in at least two separate and discrete increments. The first increment is introduced into the reactor at a point prior to reaction of said mixture having occurred while the second increment is introduced into the reactor at a point wherein at least 20 weight percent of the total titanium halide reactant has been converted to the desired titanium dioxide pigment.

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patent: 3639100 (1972-02-01), Rick
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patent: 4803056 (1989-02-01), Morris

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