Process for the production of mesophase pitch
US5198101A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 13, 1991 |
| Grant date | Mar 30, 1993 |
| Priority date | — |
| Expiry date | Dec 13, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10C3/026
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An improved process for producing an anisotropic pitch product suitable for carbon fiber manufacture. A metal alkylaryl sulfonate is combined with a carbonaceous feedstock substantially free of mesophase pitch, and the combination is heated for a period of time at an elevated temperature while passing a non-oxidative sparging gas such as nitrogen through the feedstock. The process is carried out for a sufficient period of time to produce an anisotropic pitch having from 50 to 100 percent by volume mesophase which is suitable for producing good quality carbon fibers. In one aspect of the invention, an oxidatively reactive gas is used as the sparging gas.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.