Staged temperature coal conversion process
US4313816A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 25, 1980 |
| Grant date | Feb 2, 1982 |
| Priority date | — |
| Expiry date | Aug 25, 2000 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10G1/08
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Coal or similar liquefiable carbonaceous solids are converted into lower molecular weight liquids by contacting the feed solids with molecular hydrogen in the absence of externally added hydrocarbon liquids under liquefaction conditions during sequential residence in two or more liquefaction zones arranged in series and operated such that the temperature in each zone increases from the first to the final zone. The effluent from each liquefaction zone is passed to the next succeeding higher temperature zone in the series. No hydrocarbon liquids are added to the first zone in the series and the only liquids present in each succeeding zone of the series are the liquids in the effluent from the preceding zone. Liquid hydrocarbonaceous products are recovered from the effluent withdrawn from the last zone.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.