Catalyst withdrawal and addition in a coal liquefaction process
US4172024A · kind A · utility
15Cited by
6References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 15, 1978 |
| Grant date | Oct 23, 1979 |
| Priority date | — |
| Expiry date | Jun 15, 1998 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10G1/08
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The catalyst is withdrawn from a coal hydroliquefaction reactor while it is maintained on stream by withdrawing a portion of the catalyst, in a separate stream, dispersed in product from the liquefaction zone, with such withdrawn stream being further diluted with liquid recovered from the main product stream to reduce the catalyst concentration. The catalyst containing stream is introduced into the ash separation zone, wherein catalyst is recovered with the ash containing solids. Fresh catalyst is subsequently added to the liquefaction zone in a stream of the liquid recovered from the main product stream.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.