Multiple-stage hydrogen-donor coal liquefaction process
US4189371A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 3, 1978 |
| Grant date | Feb 19, 1980 |
| Priority date | — |
| Expiry date | Jul 3, 1998 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10G1/006
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An increased yield of hydrogenated liquid product is obtained from coal by treating the feed coal with a hydrogen-donor solvent and hydrogen-containing gas in a first coal liquefaction reactor to produce a liquefaction effluent; separating the liquefaction effluent into a vaporous stream and a liquid stream, the liquid stream consisting of a low molecular weight liquid fraction and a high molecular weight liquid fraction; removing a sufficient amount of the low molecular weight liquid fraction from the high molecular weight liquid fraction to form a heavy bottoms stream containing less than about 50 weight percent of the low molecular weight liquid fraction based on the weight of the high molecular weight liquid fraction; treating the heavy bottoms stream with additional fresh hydrogen-donor solvent and hydrogen-containing gas in a second coal liquefaction reactor; separating the second liquefaction reactor product into a vaporous fraction and a liquid fraction, and recovering hydrogenated liquid products from the vaporous and liquid fractions. If desired the high molecular weight constituents in the liquid fraction from the second liquefaction reactor may be further treated with f…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.