Treatment of pigment
US4052224A · kind A · utility
12Cited by
4References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 4, 1976 |
| Grant date | Oct 4, 1977 |
| Priority date | — |
| Expiry date | Jun 4, 1996 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2004/84
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A process for the treatment of titanium dioxide pigment which involves adding to a pigment slurry a compound of phosphorus, of aluminium, of zirconium, of titanium and of silicon, adjusting the pH of the slurry to a value of from 3.5 to 4.5, followed by adding to the slurry a compound of phosphorus of an alkaline reacting compound of aluminium prior to the addition of mineral acid to adjust the pH of the slurry to a value of 6.5 to 8.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.