Coal liquefaction
US3974073A · kind A · utility
11Cited by
10References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 6, 1974 |
| Grant date | Aug 10, 1976 |
| Priority date | — |
| Expiry date | Sep 6, 1994 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10G21/003
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Insoluble material is separated from a coal liquefaction product by gravity settling in at least two gravity settlers, with overflow from a previous settler being used as feed to the subsequent settler. A promoter liquid having characterization factor of at least 9.75, a 5 volume percent distillation temperature of at least 250.degree.F and a 95 volume percent distillation temperature of at least 350.degree.F. and no greater than 750.degree.F. is employed in each settler.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.