Process for producing propylene based oligomers
US5171919A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 17, 1991 |
| Grant date | Dec 15, 1992 |
| Priority date | — |
| Expiry date | Oct 17, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S526/943
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for producing a propylene based oligomer which comprises polymerizing propylene alone or propylene and an olefin other than propylene in the presence of a catalyst comprising: PA0 (A) a transition metal compound represented by the general formula (I): EQU (R.sub.5 C.sub.5).sub.m MX.sub.4-m (I) PA0 wherein R.sub.5 C.sub.5 may be the same as or different from each other and is a hydrocarbon group-substituted cyclopentadienyl group; M is a zirconium atom or hafnium atom; X may be the same as or different from each other and is a hydrogen atom, halogen atom or hydrocarbon group; m is an integer of from 1 to 4; and PA1 (B) a compound capable of forming an ionic complex when reacted with a transition metal compound, is disclosed. According to the present invention, a propylene oligomer can be produced without using a promoter such as aluminoxane or with use of a small amount of an organoaluminum compound. Therefore, according to the present invention, such propylene based oligomers can be produced at reduced cost with use of the process comprising a simplified deashing step.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.