Oxidative after-treatment of carbon black
US4435377A · kind A · utility
11Cited by
7References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 6, 1982 |
| Grant date | Mar 6, 1984 |
| Priority date | — |
| Expiry date | Oct 6, 2002 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2006/19
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The invention relates to a process for after-oxidation of carbon black powder with oxidants which are gaseous or are dispersed in the gas phase. A closed vertical cylinder is provided at its top with a carbon black input opening and a vent duct and at its bottom with feed ducts for oxidant or flushing air. A stirrer shaft runs along its central axis; stirrer arms are fitted to it at intervals over the height of the cylinder and offset with respect to each other, and sweep over the whole cylinder cross section in predominantly horizontal setting.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.