Catalyst and process for the isomerization of olefins in the presence of reactive impurities
US5849966A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 7, 1995 |
| Grant date | Dec 15, 1998 |
| Priority date | — |
| Expiry date | Jun 7, 2015 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C2523/04
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process and catalyst for isomerizing olefins are disclosed. The process and catalyst are particularly useful for isomerizing alkenyl bridged ring compounds to the corresponding alkyladiene bridged ring compounds. In one embodiment, the isomerization catalyst comprises an oxygen treated mixture of an alkali metal on a dried support having a surface area of 125 to 195 m.sup.2 /g when the support consists essentially of alumina wherein the alumina precursor is a large crystallite pseudoboehmite. The catalyst is particularly useful for isomerizing 5-vinyl-2-norbornene to 5-ethylidiene-2-norbornene. The catalyst is very active and highly selective and resistant to catalyst poisons. The process contacts the catalyst with an alkenyl bridged ring compound and yields the corresponding alkyladiene bridged ring compound.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.