Back to results
US 8,138,348 B2Granted
Methods for oligomerizing olefins with chromium pyridine mono-oxazoline catalysts
AssigneeExxonMobil Chemical Patents Inc.
InventorsLily J. Ackerman, Gary Michael Diamond, Keith Anthony Hall, James M. Longmire, Mark L. Micklatcher
Life of this patent
Estimating the term…
Abstract
The present invention provides a method of producing oligomers of olefins, comprising reacting olefins with a chromium based catalyst under oligomerization conditions. The catalyst can be the product of the combination of a chromium compound and a pyridyl mono-oxazoline compound. In particular embodiments, the catalyst compound can be used to trimerize or tetramerize ethylene to 1-hexene, 1-octene, or mixtures of 1-hexene and 1-octene.
Claims19
A composition comprising:
- (1) a ligand selected from the group consisting of the ligands represented by the
- (2) a metal precursor compound selected from the group consisting of (THF)3CrMeCl2, (Mes)3Cr(THF) (Mes=mesityl=2,4,6-trimethylphenyl), [{TFA}2Cr(OEt2)]2 (TFA=trifluoroacetate), (THF)3CrPh3, CrCl3(THF)3, CrCl4(NH3)2, Cr(NMe3)2Cl3, CrCl3, Cr(acac)3 (acac =acetylacetonato), Cr(2-ethylhexanoate)3, Cr(neopentyl)4, Cr(CH2—C6H4-o-NMe2)3, Cr(TFA)3, Cr(CH(SiMe3)2)3, Cr(Mes)2(THF)3, Cr(Mes)2(THF), Cr(Mes)Cl(THF)2, Cr(Mes)Cl(THF)0.5, Cr(p-tolyl) Cl2(THF)3, Cr(diisopropylamide)3, Cr(picolinate)3, [Cr2Me8][Li(THF)]4, CrCl2(THF), Cr(NO3)3, [CrMe6][Li(Et2O)]3, [CrPh6][Li(THF)]3, [CrPh6][Li(n-Bu2O)]3, [Cr(C4H8)3][Li(THF)]3, CrCl2, Cr(hexafluoroacetylacetonato)3, (THF)3Cr(η2-2,2′-Biphenyl)Br and mixtures thereof;
- and
- (3) optionally, one or more activators.
1 more element
Dependencies are inferred from the claim text.