King Fahd University of Petroleum and Minerals

Saudi Arabian Oil Company

Ea Jaseer

Wei Xu

Motaz Khawaji

Samir Barman

Fahad A Almalki

Nestor Garcia Villalta

Niladri Maity

Samiyah Abdullaziz Al-Jendan

A method of dimethyl carbonate production includes reacting COand methanol in the presence of a heteroatom-modified cerium oxide catalyst to form dimethyl carbonate. The heteroatom-modified cerium oxide catalyst includes an element selected from the group consisting of N, S and combinations thereof, in an amount ranging from 0.05 to 2 wt. % based on the total weight of the heteroatom-modified cerium oxide catalyst. The heteroatom-modified cerium oxide catalyst is in the form of nanorods with an average diameter in a range from 1 to 50 nm and an average length in a range from 10 to 700 nm. The dimethyl carbonate yield is greater than or equal to 40 mmol·g.

Method of dimethyl carbonate production

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 R, R, and Rare each independently chosen from a (C-C) hydrocarbyl group or a (C-C) heterohydrocarbyl group, and wherein the (C-C) hydrocarbyl or (C-C) heterohydrocarbyl groups of R, R, and Rhave greater than 10 carbon atoms combined and R, R, R, and Rand R, R, R, and R, are independently chosen from a hydrogen atom or a (C-C) hydrocarbyl group.

Catalyst systems that include silyl ether moieties

Catalyst systems suitable for tetramerizing ethylene to form 1-octene may include a catalyst comprising a chromium compound coordinated with a ligand and a co-catalyst comprising an organoaluminum compound. The ligand may include have a chemical structure according to formula (I), wherein at least one of R, R, R, R, R, R, R, R, R, R, R, and Rhave the structure according to formula (II) wherein R, R, R, and Rand the remainder of R, R, R, R, R, R, R, R, R, R, R, and Rare independently chosen from a hydrogen or a (C-C) hydrocarbyl group.

Catalyst systems

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Dhahran, Saudi Arabia

Ea Jaseer