TiO.sub.2 manufacturing process
US5201949A · kind A · utility
24Cited by
9References
25Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 20, 1992 |
| Grant date | Apr 13, 1993 |
| Priority date | — |
| Expiry date | May 20, 2012 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2006/80
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Titanium dioxide pigment prepared by the high pressure (e.g., 10-200 PSIG) oxidation of TiCl.sub.4 vapor is improved with respect to carbon black undertone, specific surface area, and gloss properties by the addition of a nucleant consisting essentially of a cesium substance which is present in the amount of about 8-2,000 parts per million, based on the weight of the TiO.sub.2. The foregoing process is also used wherein the residence time of the reactants in the mixing zone of the reactor is about 1-16 milliseconds.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.