Saudi Arabian Oil Company

King Fahd University of Petroleum and Minerals

E A Jaseer

Wei Xu

Motaz Khawaji

Samir Barman

Nestor Garcia Villalta

Fahad A Almalki

Catalyst systems for tetramerizing ethylene to form 1-octene may include a catalyst which may include a chromium compound coordinated with a ligand and a co-catalyst which may include an organoaluminum compound. The ligand may have a chemical structure according to Chemical Structure (I), wherein Ris a (C-C) alkyl group, a (C-C) cyclohydrocarbyl group, a (C-C) cycloheterohydrocarbyl group, or a (C-C) aryl group, and R, R, R, R, R, R, R, R, R, R, R, R, R, R, R, and Rare independently chosen from a hydrogen atom, a (C-C) hydrocarbyl group, or a (C-C) heterohydrocarbyl group.

Catalyst systems that include meta-alkoxy substituted n-aryl bis-diphosphinoamine ligands

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: (R)(R)A-X&#x2014;C(R)(R). A and C may be phosphorus. X may be B(R), Si(R), N(R), wherein Ris 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. R, R, R, and Rmay be independently chosen hydrocarbyl groups or heterohydrocarbyl groups.

Catalyst systems

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Dhahran, Saudi Arabia

E A Jaseer