Process for producing pitch for using as raw material for carbon fibers
US4460454A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 7, 1983 |
| Grant date | Jul 17, 1984 |
| Priority date | — |
| Expiry date | Jan 7, 2003 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD01F9/322
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A process for producing a pitch which is used as a raw material for producing carbon fibers is disclosed. The process comprises subjecting a petroleum heavy residual oil to hydrogenation treatment in the presence of catalysts, removing a low boiling point fraction of the oil by reduced pressure distillation, subjecting the resulting reduced pressure distillation residual oil to solvent extraction treatment, and carrying out thermal modification of the resulting extraction component. By utilizing the process for producing the pitch it is possible to use a wide variety of different types of oils in order to produce carbon fibers. The carbon fibers produced from the pitch produced according to the disclosed process have desirable characteristics.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.