METHOD FOR ETHYLENE OLIGOMERIZATION

摘要

The present invention relates to a method for ethylene oligomerization. According to the method of the present invention, highly active ethylene oligomerization reaction is possible by using a catalyst system including a novel chromium compound exhibiting high activity for ethylene oligomerization reaction, and therefore, polyethylene can be prepared using a small amount of comonomers or using only ethylene without comonomers.

主权项

1. A method for ethylene oligomerization, comprising the step of polymerizing ethylenes in the presence of a catalyst system including i) a ligand compound represented by the following Chemical Formula 1 and a chromium source, or ii) a chromium compound represented by the following Chemical Formula 2; and a cocatalyst: wherein R1, R2, R2′ and R3 are the same as or different from each other, and each independently a hydrogen atom, a hydrocarbyl group having 1 to 30 carbon atoms, or a heterohydrocarbyl group having 1 to 30 carbon atoms, and X is a halogen atom or an alkyl group having 1 to 6 carbon atoms.