Purification of crude titanium tetrachloride
AssigneeSCM Corporation
InventorJames Paul Bonsack
Life of this patent
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Abstract
A method for separating niobium pentachloride and tantalum pentachloride contaminants from crude titanium chloride vehicle by addition of water to said vehicle to form substantially selectively solid hydration products of such contaminants which are readily separable.
Claims10
A method for separating contaminant chloride of niobium and/or tantalum from crude titanium tetrachloride vehicle contaminated therewith, which comprises:
- establishing a reaction mixture of said crude titanium tetrachloride vehicle with water in a proportion of water not substantially above 1 mole per mole of said contaminant chloride present;
- maintaining said vehicle in liquid state until a solid hydration product of said contaminant chloride forms with essentially no net reaction of titanium tetrachloride in said vehicle with said water;
- and
- separating said solid hydration product of said contaminant chloride from said vehicle.
In a process for chlorination of titaniferous material wherein a generated crude stream containing titanium tetrachloride is quenched for removal of impurities including impurity metal chlorides, and the resulting crude titanium tetrachloride stream liquefied, the improvement for removing contaminant chloride selected from niobium pentachloride, tantalum pentachloride, and mixtures thereof from said liquefied crude titanium tetrachloride stream which comprises;
- establishing a reaction mixture of said crude stream with water in a proportion of water not substantially above 1 mole per mole of said contaminant chloride present;
- maintaining said reaction mixture for a time sufficient until a solid hydration product of said contaminant chloride forms with essentially no net reaction of said titanium tetrachloride in said stream with said water;
- and
- separating said solid hydration product from said reaction mixture.
Dependencies are inferred from the claim text.