Process for producing iron oxide pigments
US6503315B1 · kind B1 · utility
10Cited by
3References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 22, 2000 |
| Grant date | Jan 7, 2003 |
| Priority date | — |
| Expiry date | Dec 14, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K2003/2265
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention relates to a process for producing iron oxide red pigments containing the step of forming a suspension of haematite nuclei by reaction between dilute nitric acid and elemental iron above 90° C. and to pigments of pure color and their use.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.