To titanium dioxide pigment
Patent No. U.S. 6,548,039 B1
Altair Nanomaterials has received a patent for a process for producing pigment-grade titanium dioxide from an aqueous titanium solution. It is comprised of hydrolyzing the solution to form titanium oxide particles in a controlled temperature, evaporation process at a temperature higher than the boiling point of the solution; calcining the titanium oxide particles to remove residual water to form a desired titanium dioxide crystal structure selected from the group consisting of anatase and rutile; and milling the titanium dioxide.