Fluorinated transition metal catalysts and large scale formation thereof

摘要

Catalyst systems and methods of forming the same are described herein. The catalyst system may be formed by contacting an alumina-silica support composition with ammonium bifluoride in the presence of water to form a first fluorinated support composition. The method then includes heating the first fluorinated support composition in an oxygen containing atmosphere to a temperature of from about 200° C. to about 600° C. to form a second fluorinated support composition, wherein the second fluorinated support composition includes a bonding sequence selected from Si-O-Al-F, F-Si-O-Al, F-Si-O-Al-F and combinations thereof and then contacting the second fluorinated support composition with a transition metal compound to form a supported catalyst system, wherein the transition metal compound is represented by the formula [L]_mM[A]_n; wherein L is a bulky ligand, A is a leaving group, M is a transition metal and m and n are such that a total ligand valency corresponds to the transition metal valency.