Process for in-situ formation of chlorides in the preparation of titanium dioxide
US8734756B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 9, 2010 |
| Grant date | May 27, 2014 |
| Priority date | — |
| Expiry date | Feb 7, 2031 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01B9/02
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A process for producing titanium dioxide, comprising: a) reacting an alloy comprising a metal selected from the group consisting of aluminum, titanium and mixtures thereof, wherein one metal is a major component of the alloy, and an element, with chlorine gas to form chlorides of aluminum, titanium or mixtures thereof and chlorides of the element, at or above the boiling point of the chloride of the major component of the alloy; with the proviso that the element does not comprise Ti when the metal is Ti and does not comprise Al when the metal is Al; (b) adding titanium tetrachloride to the chlorides formed in step (a); (c) oxidizing the chlorides formed in step (a), and titanium tetrachloride of step (b); and (d) forming titanium dioxide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.