Coal liquefaction with subsequent bottoms pyrolysis
US4085031A · kind A · utility
8Cited by
5References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 11, 1976 |
| Grant date | Apr 18, 1978 |
| Priority date | — |
| Expiry date | Aug 11, 1996 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10G1/002
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
In a coal liquefaction process wherein heavy bottoms produced in a liquefaction zone are upgraded by coking or a similar pyrolysis step, pyrolysis liquids boiling in excess of about 1000.degree. F. are further reacted with molecular hydrogen in a reaction zone external of the liquefaction zone, the resulting effluent is fractionated to produce one or more distillate fractions and a bottoms fraction, a portion of this bottoms fraction is recycled to the reaction zone, and the remaining portion of the bottoms fraction is recycled to the pyrolysis step.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.