System for producing a powdery composition comprising coal products in a coal deashing process
US4244812A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 28, 1978 |
| Grant date | Jan 13, 1981 |
| Priority date | — |
| Expiry date | Dec 28, 1998 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10G1/045
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An improved system for deashing coal liquefaction products wherein a feed mixture (including a deashing solvent, soluble coal products and insoluble coal products) is separated in a first separation zone into a first light fraction and a first heavy fraction (including insoluble coal products and some deashing solvent). The first heavy fraction is withdrawn from the first separation zone and the pressure level of the first heavy fraction is reduced at least 100 psig for vaporizing the deashing solvent and for yielding a composition substantially comprising coal products. The composition is essentially a powdery, solid material and is capable of being transferred via a slurry or mechanical means.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.