Process for upgrading olefinic C.sub.4 cuts
US4392002A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 16, 1981 |
| Grant date | Jul 5, 1983 |
| Priority date | — |
| Expiry date | Oct 16, 2001 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C2523/755
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A C.sub.4 cut is upgraded according to the following steps: PA0 (a) the dried C.sub.4 cut is polymerized in the presence of fluorinated alumina, boron-alumina or silica-alumina, to convert at least 95% of isobutene to dimers and trimers, the conversion of the normal butenes being at most 3%, PA0 (b) the whole polymerization effluent is hydro-isomerized in the presence of a group VIII metal catalyst, to isomerize at least 90% of the 1-butene of said effluent, PA0 (c) the hydro-isomerization effluent is fractionated and a resultant fraction is alkylated. Resultant alkylate and mixture of dimers and trimers can be mixed and used as gasoline.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.