公开(公告)号：US20230416418A1

公开(公告)日：2023-12-28

申请号：US18250438

申请日：2021-11-17

Applicant: EXXONMOBIL CHEMICAL PATENTS INC.

Inventor： Nikola S. LAMBIC ,  Francis C. RIX ,  Lubin LUO ,  Charles J. HARLAN ,  An Ngoc-Michael NGUYEN

IPC: C08F4/6592 ,  C08F4/659 ,  C08F10/06 ,  C07F7/08

CPC classification number: C08F4/65927 ,  C08F4/65916 ,  C08F2420/10 ,  C08F10/06 ,  C07F7/081 ,  C08F4/65912

Abstract: The present disclosure provides aromatic-solvent-free supported catalyst compounds and catalyst systems comprising asymmetric bridged metallocenes containing a ligand having at least one saturated ring, catalyst systems including such compounds, and uses thereof. These supported catalyst compounds and catalyst systems can be used to prepare polymer comprising no aromatic solvent.

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：US20240092947A1

公开(公告)日：2024-03-21

申请号：US18253867

申请日：2021-11-17

Applicant: ExxonMobil Chemical Patents Inc.

Inventor： Lubin LUO ,  Francis C. RIX ,  Kevin A. Stevens ,  Chi-l KUO ,  Xiaodan ZHANG ,  Jacqueline A. LOVELL ,  Charles J. HARLAN ,  Xuan YE ,  Brian R. BERG

IPC: C08F4/659 ,  C08F10/06 ,  C08F10/14

CPC classification number: C08F4/65916 ,  C08F10/06 ,  C08F10/14

Abstract: The present disclosure relates to supported catalyst systems for olefin polymerization, catalyst system precursors, methods of producing the precursors and catalyst systems and polyolefins formed from the catalyst systems.

公开(公告)号：US20220332864A1

公开(公告)日：2022-10-20

申请号：US17640172

申请日：2020-08-14

Applicant: EXXONMOBIL CHEMICAL PATENTS INC.

Inventor： Xiaodan ZHANG ,  Christopher G. BAUCH ,  Lubin LUO ,  Jeffrey L. BRINEN ,  George J. PEHLERT ,  Todd S. EDWARDS ,  Sung A. KIM

IPC: C08F210/06

Abstract: Provided herein are methods of polymerizing α-olefin monomer with a catalyst and hydrogen in a slurry to produce low molecular weight polyolefins. Hydrogen is vented from the low molecular weight polyolefins and then the low molecular weight polyolefins are further polymerized in a gas phase to produce a polyolefin having a molecular weight distribution of between 4.0 and 30 and a flexural modulus between 1500 mPa and 2500 mPa.

公开(公告)号：US20180171040A1

公开(公告)日：2018-06-21

申请号：US15564397

申请日：2016-03-10

Applicant: ExxonMobil Chemical Patents Inc.

Inventor： Xuan YE ,  Matthew W. HOLTCAMP ,  Lubin LUO ,  Laughlin G. McCULLOUGH ,  Gregory S. DAY ,  Francis C. RIX ,  Jo Ann M. CANICH ,  David F. SANDERS ,  Matthew S. BEDOYA

IPC: C08F10/02

CPC classification number: C08F10/02 ,  C08F4/65912 ,  C08F4/65916 ,  C08F4/6592 ,  C08F4/65927 ,  C08F210/16 ,  C08F2420/02 ,  C08F210/14 ,  C08F2500/12 ,  C08F2500/18 ,  C08F4/65904 ,  C08F2500/05 ,  C08F2500/08

Abstract: This invention relates to a catalyst system comprising fluorided silica, alkylalumoxane activator and at least two metallocene catalyst compounds, where the first metallocene is a bridged monocyclopentadienyl group 4 transition metal compound and the second metallocene is a biscyclopentadientyl group 4 transition metal compound, where the fluorided support has not been calcined at a temperature of 400° C. or more, and is preferably produced using a west mixing method, such as an aqueous method.