Method for producing mesophase pitch
US4529498A · kind A · utility
14Cited by
9References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 24, 1983 |
| Grant date | Jul 16, 1985 |
| Priority date | — |
| Expiry date | Jun 24, 2003 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD01F9/322
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A method for producing a 100% mesophase pitch composed only of Q.I. and Q.S. components is provided. This method comprises subjecting petroleum-origin pitch to heat treatment with stirring under a stream of a hydrocarbon gas of small carbon atom numbers at atmospheric or superatmospheric pressure, holding said heat-treated pitch in quiescent state to melt and coalesce only the mesophase therein and dividing and separating non-mesophase and mesophase layers. Resulting 100% mesophase enables us to produce high strength, high modulus carbon fibers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.