Process for making mesophase pitch
US4999099A · kind A · utility
3Cited by
5References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 30, 1986 |
| Grant date | Mar 12, 1991 |
| Priority date | — |
| Expiry date | Jan 30, 2006 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10C3/04
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An improved process for producing an anisotropic pitch product suitable for carbon fiber manufacture. A carbonaceous feedstock is heated at elevated temperature while passing a reactive sparging gas through the feedstock. The sparging gas is an oxidative gas such as a gaseous mixture containing a major proportion of inert gas and from about 0.1 to 2% by volume of oxygen. The process produces an anisotropic pitch having from 50 to 100% by volume mesophase which is suitable for producing good quality carbon fibers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.