Multi-step hydrodesulfurization process
US5968347A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 23, 1997 |
| Grant date | Oct 19, 1999 |
| Priority date | — |
| Expiry date | May 23, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10G49/007
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A hydrotreatment process for effecting hydrotreatment of a liquid hydrocarbon feedstock containing a mixture of liquid hydrocarbons together with organic sulphurous impurities in which a desulphurised liquid first hydrocarbon fraction is contacted with a first stream of desulphurised recycle gas to produce (A) a vaporous mixture including unreacted hydrogen, hydrogen sulphide, and a second hydrocarbon fraction including relatively more volatile components of the mixture of hydrocarbons and (B) a third liquid hydrocarbon fraction including relatively less volatile components of the mixture of hydrocarbons as well as residual sulphurous impurities, the vaporous mixture and the third liquid hydrocarbon fraction being recovered as separate streams from the contact zone. The third liquid hydrocarbon fraction is contacted with a mixture of make-up hydrogen-containing gas and desulphurised recycle gas to cause hydrodesulphurisation of residual sulphurous impurities in the third liquid hydrocarbon fraction. Further processing is followed by recovering a hydrocarbon fraction as a final hydrotreated product material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.