Ethylene oligomerization with mixed ligands

• Main Authors: SEVERIN HOLLY, ZORICAK PETER, GAO XIAOLIANG, BROWN STEPHEN, CARTER CHARLES
• Format: Patent
• Language: Chinese; English
• Published: 09.11.2016
• Subjects: ACYCLIC OR CARBOCYCLIC COMPOUNDS; CHEMISTRY; METALLURGY; ORGANIC CHEMISTRY

The selective oligomerization of ethylene to produce a mixture comprising octene and hexene is conducted in the presence of a catalyst system comprising a source of chromium; two different P-N-P ligands and an activator. The phosphorus atoms of both ligands have ortho-fluoro phenyl substituents. The nitrogen atom of the first ligand has an isopropyl substituent. The nitrogen of the second ligand has a larger/bulkier hydrocarbyl substituent on the N atom. The hexene produced by the process of this invention has very high alpha selectivity. 在催化剂体系的存在下进行乙烯的选择性低聚以产生包含辛烯和己烯的混合物，所述催化剂体系包含铬源；两种不同的P-N-P配体和活化剂。两种配体的磷原子均具有邻位氟代苯基取代基。第配体的氮原子具有异丙基取代基。第二配体的氮在N原子上具有较大/较大体积的烃基取代基。由本发明的方法产生的己烯具有非常高的α选择性。