Catalytic conversion system for oligomerizing olefinic feedstock to produce heavier hydrocarbons
US4456781A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 26, 1983 |
| Grant date | Jun 26, 1984 |
| Priority date | — |
| Expiry date | Apr 26, 2003 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10G50/00
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A continuous catalytic process for oligomerizing lower olefins to heavier hydrocarbons wherein a continuous liquid olefinic feedstream is diluted with a liquid alkane stream, is improved by a technique which comprises cooling catalytically converted effluent, fractionating the effluent to obtain a condensed lower aliphatic recycle stream, a liquid C.sub.3 -C.sub.4 product stream, a liquid product stream consisting essentially of C.sub.5.sup.+ hydrocarbons and a gaseous C.sub.2.sup.- gaseous stream by the sequential fractionation steps of: debutanizing the cooled effluent to obtain the liquid C.sub.5.sup.+ hydrocarbon stream and a condensed lower aliphatic stream; de-ethanizing a portion of the lower aliphatic stream to recover gaseous offgas stream and a C.sub.3 -C.sub.4 alkane product stream; and optionally recycling at least a portion of the condensed aliphatic stream from the debutanizing step for dilution of the olefinic feedstream.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.