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AssigneeAltair Nanomaterials Inc.
InventorsWillem P. C. Duyvesteyn, Timothy Malcome Spitler, Bruce James Sabacky, Andrew Vince, Jan Prochazka
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A hydrometallurgical process is provided for producing pigment grade TiO2 from titanium containing solutions. Generally, the solution is an aqueous solution. The process includes hydrolyzing the solution via complete evaporation in well-controlled conditions of temperature to form titanium oxide of well-defined characteristics. The hydrolyzing can be achieved by spray hydrolysis in a spray dryer. After hydrolyzing, the titanium oxide is calcined to transform the titanium oxide to the desired form of titanium dioxide. The titanium dioxide can be either anatase or rutile. Following calcination, the titanium dioxide is milled to provide the desired particle size distribution and then finished.
A process for producing pigment-grade titanium dioxide from an aqueous titanium solution comprising:
A process for producing pigment-grade titanium dioxide from an aqueous titanium solution comprising:
A process for producing pigment-grade titanium dioxide from an aqueous titanium solution comprising hydrolyzing the solution by spraying in a reactor at a temperature higher than the boiling point of the solution to form a titanium dioxde and calcining the titanium oxide to remove residual water.
A process for producing pigment-grade titanium dioxide from an aqueous titanium solution comprising hydrolyzing the solution to form a titanium oxide in an evaporation process at a temperature higher than the boiling point of the solution by spraying in a reactor and thereafter calcining the titanium oxide to remove residual water.
A process for producing pigment-grade titanium dioxide from an aqueous titanium solution comprising hydrolyzing the solution to form a titanium oxide in an evaporation process at a temperature higher than the boiling point of the solution by spraying in a reactor and thereafter calcining the titanium oxide to remove residual water, wherein titanium dioxide having a desired crystal structure selected from the group consisting of anatase and rutile is formed.
Dependencies are inferred from the claim text.