Method of modifying and controlling catalyst selectivity in a Fischer-Tropsch process
US6653357B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 4, 2000 |
| Grant date | Nov 25, 2003 |
| Priority date | — |
| Expiry date | Oct 4, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C2523/04
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The invention provides a method for controlling a selectivity profile of products of a Fischer-Tropsch synthesis process, wherein a catalyst promoter, either dissolved in solution or in a powdered form, is directly injected into the reactor medium, typically into the reactor feedstream. The Fischer-Tropsch process is typically a High Temperature Fischer Tropsch (HTFT) process, and a typical chemical promoter for the HTFT process is potassium. By adding or doping the reaction medium with the catalyst promoter during the synthesis process, the selectivity profile of olefins and paraffins in the product stream is significantly changed, with more olefins being formed whilst the level of paraffins is reduced, and typically the level of olefins in the C2-C4 range is increased. The catalyst promoter may form part of a promoter-carrying compound, for example, potassium carbonate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.