公开(公告)号：US11618793B2

公开(公告)日：2023-04-04

申请号：US17444094

申请日：2021-07-30

Applicant: ExxonMobil Chemical Patents Inc.

Inventor： Michael D. Lucas ,  Anne Bernard-Brunel ,  Ryan W. Impelman ,  Keng-Hua Beh ,  Diwaker Singh, Sr. ,  Rui Hoong Chong ,  Corrine L. Brandl ,  Luis A. Sotomayor

IPC: C08F210/02

Abstract: Gas phase polymerization processes include contacting an input stream comprising a monomer and an induced condensing agent in the presence of an inert gas with a catalyst in a fluidized bed reactor to produce a polymer, unreacted monomer, and an output gas; recycling a recycle stream of the unreacted monomer from the reactor to the input stream; venting at least a portion of the output gas from the reactor; and maintaining a partial pressure of the inert gas in the reactor above a reference inert gas pressure to decrease losses of the recycle stream with the vented output gas. The processes may include controlling the inert gas partial pressure to vary the total reactor pressure up to the maximum safe pressure, without causing carry-over of product polymer.

公开(公告)号：US11274170B2

公开(公告)日：2022-03-15

申请号：US16336987

申请日：2017-09-07

Applicant: ExxonMobil Chemical Patents Inc.

Inventor： Corrine L. Brandl ,  Fred D. Ehrman ,  James R. Lattner

IPC: C08F210/16 ,  C08F2/34 ,  C08K5/01 ,  C08F210/02 ,  C08F2/00 ,  C08F4/14 ,  C08F4/24 ,  C08F4/80

Abstract: A process including contacting one or more monomers, at least one catalyst system, and at least two condensing agents under polymerizable conditions to produce a polyolefin polymer is provided where the vapor pressure of the condensing agents is ±4 bara of the optimum vapor pressure given by the formula: optimum vapor pressure=614−716*D+2.338*P+3.603*ln(MI), where the optimum vapor pressure has units (bara), D is the polyolefin polymer density with units (g/cc), P is the polymerization condition pressure with units (barg), and MI is the polyolefin polymer melt index with units (g/10 min). The invention also relates to a process where at least three condensing agents are used.

公开(公告)号：US20220064343A1

公开(公告)日：2022-03-03

申请号：US17444094

申请日：2021-07-30

Applicant: ExxonMobil Chemical Patents Inc.

Inventor： Michael D. Lucas ,  Anne Bernard-Brunel ,  Ryan W. Impelman ,  Keng-Hua Beh ,  Diwaker Singh ,  Rui Hoong Chong ,  Corrine L. Brandl ,  Luis A. Sotomayor

IPC: C08F210/02

Abstract: Gas phase polymerization processes include contacting an input stream comprising a monomer and an induced condensing agent in the presence of an inert gas with a catalyst in a fluidized bed reactor to produce a polymer, unreacted monomer, and an output gas; recycling a recycle stream of the unreacted monomer from the reactor to the input stream; venting at least a portion of the output gas from the reactor; and maintaining a partial pressure of the inert gas in the reactor above a reference inert gas pressure to decrease losses of the recycle stream with the vented output gas. The processes may include controlling the inert gas partial pressure to vary the total reactor pressure up to the maximum safe pressure, without causing carry-over of product polymer.

公开(公告)号：US11208513B2

公开(公告)日：2021-12-28

申请号：US16491865

申请日：2018-02-07

Applicant: ExxonMobil Chemical Patents Inc.

Inventor： Corrine L. Brandl ,  William A. Lamberti ,  Charles R. Buhler ,  Judson S. Clements ,  Harry W. Deckman ,  Joseph Moebus ,  Marc L. DeChellis

IPC: C08F210/16 ,  C08F4/02 ,  C08F2/00 ,  B01J31/16 ,  B01J35/00 ,  C08F2/34 ,  C08F4/659 ,  C08F210/06 ,  C08F210/08 ,  C08F210/14

Abstract: A process for producing polyethylene polymers including contacting ethylene and at least one C3 to C8 alpha-olefin comonomer with a polymerization catalyst on a particulate support in a fluidized bed polymerization reactor under conditions effective to polymerize at least part of the ethylene and comonomer and produce the polyethylene polymers, wherein the support has a d10 particle size as measured by laser diffraction of at least 18 microns, is provided.

公开(公告)号：US20200291149A1

公开(公告)日：2020-09-17

申请号：US16491865

申请日：2018-02-07

Applicant: ExxonMobil Chemical Patents Inc.

Inventor： Corrine L. Brandl ,  William A. Lamberti ,  Charles R. Buhler ,  Judson S. Clements ,  Harry W. Deckman ,  Joseph Moebus ,  Marc L. DeChellis

IPC: C08F210/16 ,  C08F210/06 ,  C08F210/08 ,  C08F210/14 ,  C08F2/34 ,  C08F4/659

Abstract: A process for producing polyethylene polymers including contacting ethylene and at least one C3 to C8 alpha-olefin comonomer with a polymerization catalyst on a particulate support in a fluidized bed polymerization reactor under conditions effective to polymerize at least part of the ethylene and comonomer and produce the polyethylene polymers, wherein the support has a d10 particle size as measured by laser diffraction of at least 18 microns, is provided.

公开(公告)号：US20200071438A1

公开(公告)日：2020-03-05

申请号：US16492996

申请日：2018-02-28

Applicant: ExxonMobil Chemical Patents Inc.

Inventor： Corrine L. Brandl ,  Fred D. Ehrman ,  Edward F. Smith ,  Chi-I Kuo

IPC: C08F210/16

Abstract: A process for preparing a catalyst system including contacting one or more catalysts having a Group 3 through Group 12 metal atom or lanthanide metal atom with a methylalumoxane and one or more support material compositions to a concentration of methylalumoxane of about 4 mmol to about 15 mmol aluminum per gram of support material is provided. The support material composition may have a macroporosity of from about 0.18 cc/g to about 0.50 cc/g. In other embodiments, a process for polymerizing at least one olefin to produce a polyolefin composition including contacting one or more olefins with the aforementioned catalyst system is also provide.

公开(公告)号：US20190218318A1

公开(公告)日：2019-07-18

申请号：US16336987

申请日：2017-09-07

Applicant: ExxonMobil Chemical Patents Inc.

Inventor： Corrine L. Brandl ,  Fred D. Ehrman ,  James R. Lattner

IPC: C08F210/16 ,  C08F210/02 ,  C08F2/34 ,  C08K5/01

CPC classification number: C08F210/16 ,  C08F2/00 ,  C08F2/34 ,  C08F4/14 ,  C08F4/24 ,  C08F4/80 ,  C08F210/02 ,  C08F2500/08 ,  C08F2500/12 ,  C08K5/01

Abstract: A process including contacting one or more monomers, at least one catalyst system, and at least two condensing agents under polymerizable conditions to produce a polyolefin polymer is provided where the vapor pressure of the condensing agents is ±4 bara of the optimum vapor pressure given by the formula: optimum vapor pressure=614−716*D+2.338*P+3.603*ln(MI), where the optimum vapor pressure has units (bara), D is the polyolefin polymer density with units (g/cc), P is the polymerization condition pressure with units (barg), and MI is the polyolefin polymer melt index with units (g/10 min). The invention also relates to a process where at least three condensing agents are used.