Process for the liquefaction of coal and separation of solids from the liquid product
US4081358A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 29, 1976 |
| Grant date | Mar 28, 1978 |
| Priority date | — |
| Expiry date | Dec 29, 1996 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10G1/006
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Production of a low mineral content fuel by a coal liquefaction process utilizing a hydrogenated coal solvent having been hydrogenated to remove at least about 80% of the asphaltenes which yields as the primary product a mixture of liquid and solids, a part of which is suspended in the liquid. The suspended solids are effectively removed with minimum loss of desired product by means of a light aromatic solvent in combination with a hydrogenated coal solvent having been hydrogenated to remove at least about 80% of the asphaltenes with a weight ratio of unreacted coal oil solvent to light aromatic solvent of from about 0.1 to about 1000.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.