Removal of quinoline insolubles from coal derived fractions
US4405439A · kind A · utility
8Cited by
7References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 13, 1981 |
| Grant date | Sep 20, 1983 |
| Priority date | — |
| Expiry date | Mar 13, 2001 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10C1/18
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Coal tar pitch is contacted with a promoter liquid having a 5 volume percent distillation temperature of at least 250.degree. F. and a 95 volume percent distillation temperature of at least 350.degree. F. and no greater than about 750.degree. F. with the liquid having a characterization factor of at least 9.75 to promote the separation of quinoline insolubles from the pitch. A coat tar pitch fraction essentially free of quinoline insolubles is then subjected to coking to produce a needle coke. The process is also applicable to separation of quinoline insolubles from coal tar derived binder pitch.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.