Method for purifying TiO.sub.2 ore
AssigneeE. I. Du Pont de Nemours and Company
InventorTze Chao
Life of this patent
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Abstract
Process for beneficiating titanium bearing ore selected from the group consisting essentially of titaniferous ores, leucoxene, rutile, perovskite, and sphene comprising: (a) contacting said ore with an aqueous solution of a mineral acid having a concentration of about 3-30 percent by weight said contacting taking place at a temperature of about 160.degree.-300.degree. C., until the desired amount of impurities are solubilized and a leachate is formed, (b) removing the leachate from the product of step (a).
Claims20
Process for reducing the amount of thorium and uranium in a titanium bearing ore selected from the group consisting essentially of titaniferous ores, leucoxene, rutile, perovskite, sphene, and derivatives thereof, comprising:
- (a) contacting said titanium bearing ore, wherein said ore is characterized as containing an unacceptable level of radionuclide selected from the group consisting of thorium and uranium of greater than about 250 ppm, with an aqueous solution of a mineral acid having an acid concentration of about 3-30 percent by weight, said contacting taking place at a temperature range in excess of 150.degree. C. up to about 300.degree. C., until the desired amount of thorium and uranium are solubilized and a leachate is formed;
- and thereafter,
- (b) removing and recovering the remaining ore of reduced level of radionuclide from the leachate.
Dependencies are inferred from the claim text.