Process for the addition of boron in a TiO.sub.2 manufacturing process
US5728205A · kind A · utility
8Cited by
6References
23Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 11, 1996 |
| Grant date | Mar 17, 1998 |
| Priority date | — |
| Expiry date | Dec 11, 2016 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2006/60
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The present invention provides a process for producing titanium dioxide (TiO.sub.2) pigment comprising boron oxide (B.sub.2 O.sub.3), comprising the steps of: (a) reacting titanium tetrachloride (TiCl.sub.4) in the vapor phase with an aluminum compound and an oxygen-containing gas in a reactor at a temperature in the range of about 900.degree. C. to about 1600.degree. C. to provide a gaseous suspension comprising TiO.sub.2 particles, and (b) contacting the gaseous suspension comprising the TiO.sub.2 particles with a boron compound to produce TiO.sub.2 pigment comprising B.sub.2 O.sub.3.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.