公开(公告)号：US20200270375A1

公开(公告)日：2020-08-27

申请号：US16761559

申请日：2018-10-26

Applicant: ExxonMobil Chemical Patents Inc.

Inventor： Chi-I Kuo ,  Bruce J. Savatsky ,  Micah A. McClure ,  Kevin M. Ferreira ,  Charles J. Harlan ,  Valerie H. Markham

IPC: C08F2/34 ,  C08F10/02 ,  C08F6/02

Abstract: Provided herein are methods and systems for at least partially deactivating at least one component of a reactor effluent from gas phase polyolefin polymerization processes utilizing at least one glycol.

公开(公告)号：US20200087422A1

公开(公告)日：2020-03-19

申请号：US16471272

申请日：2017-09-07

Applicant: ExxonMobil Chemical Patents Inc.

Inventor： John R. Hagadorn ,  Charles J. Harlan ,  Richard B. Pannell ,  Chi-I Kuo

IPC: C08F2/34 ,  C08F210/16 ,  C08F2/38

Abstract: A process including contacting one or more monomers, at least one catalyst system, and a condensing agent including ≥10 mol % tetramethylsilane under polymerizable conditions to produce a polyolefin polymer is provided.

公开(公告)号：US20190389988A1

公开(公告)日：2019-12-26

申请号：US16449257

申请日：2019-06-21

Applicant: ExxonMobil Chemical Patents Inc.

Inventor： Xuan Ye ,  Jonathan J. Schaefer ,  Timothy M. Boller ,  Christopher S. Breiner ,  Chi-I Kuo ,  Kevin A. Stevens ,  Logan E. Shephard ,  Eyerusalem H. Mamo ,  Evan J. Morris ,  Shamah Lloyd

IPC: C08F210/16 ,  C08L23/06 ,  C08F4/6192 ,  C08F4/622 ,  C08F2/34 ,  C08K3/36

Abstract: Methods to produce heterogeneous polyethylene granules, the method including: contacting first olefin monomers and second olefin monomers with a catalyst system in a single reaction zone to produce heterogeneous polyethylene granules and recovering the heterogeneous polyethylene granules; wherein the catalyst system includes a product of a combination including: one or more catalysts having a Group 3 through Group 12 metal atom or lanthanide metal atom; at least one activator; and optionally, one or more support material compositions; and wherein the heterogeneous polyethylene granules include a product of a combination of: a first portion comprising a first polyethylene including the first olefin monomers and the second olefin monomers; a second portion including a second polyethylene including the first monomers and the second monomers; and wherein the first polyethylene has a higher second monomer weight percent than the second polyethylene, are provided.