Process for making titanium oxide from titanium ore
AssigneeOccidental Research Corporation
InventorsRobert A. Hard, Martin A. Prieto
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Abstract
The instant invention relates to a process for the preparation of titanium dioxide from an ore comprising titanium oxides which comprises the steps of fluorinating said ore to convert the titanium oxides to titanium fluorides; and, contacting said titanium fluorides with an alkaline material at conditions whereby said titanium fluorides are converted to titanium dioxide. The ore may be an ilmenite ore and the fluorination may be carried out by contacting said ilmenite ore with a fluosilicate salt as sodium fluosilicate.
Claims7
A process for the preparation of titanium dioxide from an alkalimetal fluotitanate selected from the group consisting of K.sub.2 TiF.sub.6 and Na.sub.2 TiF.sub.6 which comprises the steps of:
- (a) contacting an aqueous solution comprising said alkalimetal fluotitanate with an aqueous solution comprising an alkaline material selected from the group consisting of alkaline and alkaline earth metal hydroxides, oxides or carbonates, which do not form insoluble fluoride salts at conditions whereby said alkalimetal fluotitanate is converted to titanium dioxide in the resulting solution, and (b) separating said titanium dioxide from said resulting solution as the rutile crystal modification.
Dependencies are inferred from the claim text.