Separation of insoluble material from coal liquefaction product by gravity settling
US4077881A · kind A · utility
6Cited by
3References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 8, 1976 |
| Grant date | Mar 7, 1978 |
| Priority date | — |
| Expiry date | Jul 8, 1996 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10G31/09
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Insoluble material is separated from a coal liquefaction product by gravity settling in the presence of a promoter liquid having specific characteristics, with a portion of the solid containing underflow being recycled to the gravity settler and introduced at a point above the introduction of the coal liquefaction product, with the respective points of introduction being separated by a distance of at least 0.1 H and no greater than 0.5 H wherein H is the total height of the gravity settler.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.