Catalyst systems
AssigneesSaudi Arabian Oil Company, King Fahd University of Petroleum and Minerals
InventorsE A Jaseer, Samir Barman, Nestor Garcia Villalta, Motaz Khawaji, Wei Xu
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Abstract
Catalyst systems suitable for tetramerizing ethylene to form 1-octene may include a catalyst including a chromium compound coordinated with a ligand and a co-catalyst including an organoaluminum compound. The ligand may have a chemical structure: (R1)(R2)A-X—C(R3)(R4). A and C may be phosphorus. X may be B(R5), Si(R5)2, N(R5), wherein R5 is an aryl group substituted with a halogen, halogenated alkyl or a silyl group, and wherein B, or N, or Si is bound to A and C. R1, R2, R3, and R4 may be independently chosen hydrocarbyl groups or heterohydrocarbyl groups.
Claims20
A catalyst system suitable for tetramerizing ethylene to form 1-octene, the catalyst system comprising:
- a catalyst comprising a chromium compound coordinated with a ligand;
- and
- a co-catalyst comprising an organoaluminum compound,
- wherein:
- the ligand has a chemical structure:
- (R1)(R2)A-X-C(R3)(R4);
- A and C are phosphorus;
- X is B(R5), Si(R5)2, or N(R5), wherein R5 is an aryl group substituted with a halogenated alkyl or a silyl group, and wherein the B, the N, or the Si is bound to A and C;
- and
- R1, R2, R3, and R4 are independently chosen hydrocarbyl groups or heterohydrocarbyl groups.
A catalyst system suitable for tetramerizing ethylene to form 1-octene, the catalyst system comprising:
- a catalyst comprising a chromium compound coordinated with a ligand;
- and
- a co-catalyst comprising an organoaluminum compound,
- wherein the ligand has a chemical structure:
- wherein:
- each Ar is independently chosen from a substituted or unsubstituted aryl group;
- R6, R7, R8, R9, and R10 are each independently chosen from hydrogen or a substituted or unsubstituted hydrocarbyl group;
- and
- one or more of R6, R7, R8, R9, and R10 are groups represented formulaically as CnF2n+1 or as SiZ3, where each Z is independently chosen from a substituted or unsubstituted hydrocarbyl group or a substituted or unsubstituted heterohydrocarbyl group.
Dependencies are inferred from the claim text.