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AssigneeMillennium Inorganic Chemicals, Inc.
InventorsJames Clark Deberry, Michael Robinson, Mark Douglas Pomponi, Anthony J. Beach, Yun Xiong, Kamal Akhtar
Estimating the term…
A process for controlling the formation of TiO2 particles in a multi-stage vapor-phase oxidation reactor wherein the process includes the steps of limiting the fraction of TiCl4 converted into TiO2 in the reaction stream of a first or intermediate stage of the reactor under conditions that control the mean residence time distribution of the reacting mass. By running the reaction in this manner, the growth of TiO2 particles produced is so controlled that after subsequent standard finishing steps (e.g. milling) the fraction of particles having an average size of less than 0.5 μm is reduced or minimized.
A process for producing titanium dioxide in a multi-stage gas phase reactor, the process comprising the steps of:
A process for producing titanium dioxide in a multi-stage gas phase reactor, the process comprising:
A process for controlling and limiting the particle size of titanium dioxide being produced in a multi-stage oxidation reactor, the process comprising the steps of:
A process of controlling the temperature of a stream of vaporized titanium tetrachloride added into a stage of a gas phase reactor, comprising adding an admixture of a liquid titanium tetrachloride to a gaseous stream comprising titanium tetrachloride, wherein the addition is accomplished with a desuperheater.
Dependencies are inferred from the claim text.