公开(公告)号：US20230391801A1

公开(公告)日：2023-12-07

申请号：US18249303

申请日：2021-11-17

Applicant: ExxonMobil Chemical Patents Inc.

Inventor： Francis C. RIX ,  Lubin LUO ,  Ky KA LE

IPC: C07F5/06 ,  C08F110/14 ,  C08F210/16

CPC classification number: C07F5/068 ,  C08F110/14 ,  C08F210/16

Abstract: A method including: contacting a support material including absorbed water with trimethylaluminum (TMA) in an aliphatic hydrocarbon; removing the aliphatic hydrocarbon by distillation at a pressure greater than or equal to 0.5 atm; heating, at a temperature ranging from about 25° C. to about 200° C., a reaction product of the support material and the TMA in a presence of TMA, wherein the TMA includes TMA in an amount of about 2-10 mmol TMA per gram of the support material in excess of an amount that reacts with the support material absorbed with water; and removing excess TMA.

公开(公告)号：US20240010660A1

公开(公告)日：2024-01-11

申请号：US18253088

申请日：2021-11-17

Applicant: ExxonMobil Chemical Patents Inc.

Inventor： Francis C. RIX ,  Ky KA LE ,  Charles J. HARLAN

IPC: C07F5/06 ,  C08F4/659

CPC classification number: C07F5/068 ,  C08F4/65916

Abstract: The present disclosure relates to a precursor for making an activator in a catalyst system for olefin polymerization and methods of producing the precursor, the catalyst system, and the polyolefin. In at least one embodiment, an alumoxane precursor includes (i) the reaction product of at least one non-hydrolytic oxygen-containing compound and at least one hydrocarbyl aluminum; and (ii) an aliphatic hydrocarbon fluid. The reaction product can be identified by first set of signals in an 1HNMR spectrum in a region from about 4.5 ppm to about 5.1 ppm and a second set of signals in a region from about 5.1 ppm to about 6.5 ppm. The ratio of the first to the second set of signals is greater than or equal to about 2.8. The alumoxane precursor is easy to store and ship compared to MAO, which is an intermediate product in conventional methods for forming supported alumoxane.