Process for hydrocracking supercritical gas extracts of carbonaceous material
US4541913A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 8, 1982 |
| Grant date | Sep 17, 1985 |
| Priority date | — |
| Expiry date | Oct 8, 2002 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S208/952
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The present invention relates to a process for hydrocracking SGE of carbonaceous material to produce light distillate, including chemical feedstocks and transport fuels. A mixture of crushed coal and a solvent is fed to an extractor 1 wherein the solvent is heated and pressurized to form a supercritical gas. Carbonaceous material is extracted from the coal into the gas. The unextracted coal, including ash and some carbonaceous material, is separated from the SGE in solution in the supercritical solvent in a separation stage 2. The SGE in the solvent is maintained in the supercritical state and fed to a hydrocracking stage 3 wherein it is mixed with excess hydrogen. After hydrocracking, the SGE in supercritical solution is passed through a pressure let-down valve 4 to a distillation stage 5 wherein the product of the hydrocracking stage 3 is separated into gases, solvent for recycling, light distillate and material boiling above 350.degree. C. The light distillate may be further treated to produce transport fuels.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.