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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.
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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.
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公开(公告)号：US11117980B2
公开(公告)日：2021-09-14
申请号：US16757331
申请日：2018-10-15
Applicant: ExxonMobil Chemical Patents Inc.
Inventor： Ryan W. Impelman , Richard J. Stolz , Marc L. DeChellis , David J. Sandell , Gerardo Corona
Abstract: In a gas phase fluidized bed polymerization process for the production of polyolefin polymers, such as polyethylene polymers or polypropylene polymers, loss of ethylene or propylene accompanying inert gas purging is reduced by passing an ethylene- or propylene-containing purge stream through a vent column to contact a hydrocarbon liquid flowing through the vent column contercurrent to the purge stream whereby unreacted ethylene or propylene in the purge stream portion is dissolved in the hydrocarbon liquid to produce an ethylene- or propylene-enriched liquid stream and an ethylene- or propylene-depleted gaseous stream. The ethylene- or propylene-enriched liquid stream is then recycled to the fluidized bed reactor, while at least part of the ethylene- or propylene-depleted gaseous stream is purged.
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公开(公告)号：US20210189023A1
公开(公告)日：2021-06-24
申请号：US16757331
申请日：2018-10-15
Applicant: ExxonMobil Chemical Patents Inc.
Inventor： Ryan W. Impelman , Richard J. StoIz , Marc L. DeChellis , David J. SandeII , Gerardo Corona
Abstract: In a gas phase fluidized bed polymerization process for the production of polyolefin polymers, such as polyethylene polymers or polypropylene polymers, loss of ethylene or propylene accompanying inert gas purging is reduced by passing an ethylene- or propylene-containing purge stream through a vent column to contact a hydrocarbon liquid flowing through the vent column contercurrent to the purge stream whereby unreacted ethylene or propylene in the purge stream portion is dissolved in the hydrocarbon liquid to produce an ethylene- or propylene-enriched liquid stream and an ethylene- or propylene-depleted gaseous stream. The ethylene- or propylene-enriched liquid stream is then recycled to the fluidized bed reactor, while at least part of the ethylene- or propylene-depleted gaseous stream is purged.
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