Process for oligomerizing C.sub.3 and higher olefins using zirconium adducts as catalysts (CS-467)
US5449850A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 12, 1991 |
| Grant date | Sep 12, 1995 |
| Priority date | — |
| Expiry date | Mar 12, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C2531/38
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
C.sub.3 and higher olefins are oligomerized using a two component catalyst system comprising (a) a soluble adduct of zirconium tetrahalide, the halogen being Br or Cl, with an organic compound selected from the group of esters, ketones, ethers, amines, nitriles, anhydrides, acid chlorides, amides or aldehydes, the organic compound having up to about 30 carbon atoms and (b) an alkyl metal selected from the group R.sub.2 AlX, RAlX.sub.2, R.sub.3 Al.sub.2 X.sub.3, R.sub.3 Al and R.sub.2 Zn where R is C.sub.1 -C.sub.20 alkyl and X is Cl or Br. ZrCl.sub.4 adducts with organic acetates are the preferred embodiments. Dimers, trimers and tetramers are selectively prepared in the process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.