公开(公告)号：US20240018278A1

公开(公告)日：2024-01-18

申请号：US18253835

申请日：2021-11-17

申请人： ExxonMobil Technology and Engineering Company-Chem

发明人： Francis C. RIX ,  Charles J. HARLAN ,  KyKA LE ,  Xiaodan ZHANG

IPC分类号： C08F4/52

CPC分类号： C08F4/52 ,  C08F2410/01 ,  C08F2500/04 ,  C08F2500/17

摘要： The present disclosure relates to processes for forming alumoxanes and catalyst systems thereof for olefin polymerization. In at least one embodiment, a process includes forming a solution by, in an aliphatic hydrocarbon having a boiling point of less than about 70 degrees Celsius, introducing at least one hydrocarbyl aluminum with at least one non-hydrolytic oxygen-containing compound and a support material. The molar ratio of aluminum to non-hydrolytic oxygen in the solution is greater than or equal to 1.5, and the combining is conducted at a temperature of less than about 70 degrees Celsius. The process includes distilling the solution at a pressure of greater than about 0.5 atm to form a supported alumoxane precursor. The process further includes heating the supported alumoxane precursor to a temperature greater than the boiling point of the aliphatic hydrocarbon fluid and less than about 160 degrees Celsius to form a supported alumoxane.