Coal liquefaction process
US4179352A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 7, 1975 |
| Grant date | Dec 18, 1979 |
| Priority date | — |
| Expiry date | Aug 7, 1995 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01B2203/0495
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A hydrogenated liquid product is obtained from coal by treating the feed coal with hydrogen-containing gas and a hydrogen-donor solvent in a coal liquefaction reactor, separating the liquefaction reactor product into a vaporous fraction and a normally liquid hydrocarbon fraction, treating the vaporous fraction for the removal of ammonia and acid gases, fractionating the normally liquid hydrocarbon fraction to obtain a distillate fraction and a bottoms fraction boiling above about 1000.degree. F., and thereafter introducing the treated vaporous fraction and at least a portion of the distillate fraction, along with fresh hydrogen, into a catalytic solvent hydrogenation reactor for the production of solvent and additional product liquids. The hydrogenated product is separated into a recycle vapor stream and a liquid stream which is subsequently fractionated to produce naphtha, recycle solvent, additional liquid products, and a bottoms fraction which can be upgraded by hydrogenation, coking, catalytic cracking or the like. This process results in improved catalyst life and activity in the solvent hydrogenation reactor, reduces the gas input to the hydrogenation reactor, reduces the nec…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.