Multi-step hydrodesulphurization process
US5292428A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 11, 1991 |
| Grant date | Mar 8, 1994 |
| Priority date | — |
| Expiry date | Dec 11, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10G2400/14
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Liquid sulphur-containing hydrocarbon feedstock is passed through two or more hydrodesulfurization zones and connected in a series each containing a packed bed of solid sulfurized catalyst. The liquid is passed from the first zone to the next until the final zone. Make up hydrogen is supplied to a hydrodesulfurization zone (i) other than the first hydrodesulfurization zone; hydrogen-containing gas is recovered from each hydrodesulfurization zone. The first hydrodesulfurization zone is supplied with hydrogen-containing gas recovered from a subsequent hydrodesulfurization zone. Hydrogen-containing gas recovered from the first hydrodesulfurization zone is purged. Liquid material recovered from the first hydrodesulfurization zone is recycled to the inlet of the hydrosulfurization zone so as to provide diluent for admixture with liquid feedstock. Any other hydrodesulfurization zone other than the first hydrodesulfurization zone and other than the hydrodesulfurization zone of step (i) is supplied with hydrogen-containing gas recovered from another hydrodesulfurization zone. The sulfur content of the hydrogen-containing gas and of the liquid hydrocarbon feedstock supplied to the first hyd…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.