Hydrotreatment-isomerization without hydrogen recycle
US5026950A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 29, 1990 |
| Grant date | Jun 25, 1991 |
| Priority date | — |
| Expiry date | May 29, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10G49/007
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A combined process for hydrotreating and isomerizing a C.sub.4 -C.sub.7 feedstock is simplified and made more efficient by the use of a common hydrogen source and low hydrogen to hydrocarbon ratio in both the hydrotreating and isomerization steps of the invention. The method supplies hydrogen to a combined hydrotreatment and isomerization process for the isomerization of a feed stream comprising C.sub.4 -C.sub.7 hydrocarbons. The hydrocarbon feed stream contains sulfur and oxygen contaminants and is combined with a hydrogen-containing stream in an amount that produces a maximum hydrogen to hydrocarbon ratio of 0.9 stdm.sup.3 m.sup.3 (50 SCFB). The hydrotreater feed is contacted in a hydrotreater reactor with a catalyst comprising a Group VIB metal and a Group VIII metal on an alumina support. Effluent from the hydrotreater passes to a first separator that separates the effluent into a first gas stream comprising hydrogen, hydrogen sulfide and water and a treated stream comprising hydrocarbons having from 4-7 carbon atoms. The first gas stream is rejected from the process. The treated stream is mixed with a second hydrogen-containing stream in a proportion that produces a hydrogen t…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.