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公开(公告)号：US20240239929A1
公开(公告)日：2024-07-18
申请号：US18559095
申请日：2022-04-26
发明人： Jun Shi , Jay L. Reimers , Yifeng Hong , Keifer D. Slaton , Adrian G. Barry , Vetkav R. Eswaran , Brian R. Greenhalgh , Stacy Jordahl
IPC分类号： C08F210/06 , C08F2/01 , C08F2/06 , C08F210/02
CPC分类号： C08F210/06 , C08F2/01 , C08F2/06 , C08F210/02
摘要： The present disclosure relates to a process including introducing a feed to a catalyst and an activator to provide a solution in a continuous or semi-continuous reactor. The feed can include a solvent, and a first monomer that is propylene. The reactor can include polymerization conditions including a pressure of about 1 MPa to about 5 MPa and/or a temperature of about 60° C. to about 120° C. The solution can be circulated to form a biphasic product including a first portion and a second portion, the first portion having a propylene based polymer having a polydispersity index of about 1.5 to about 15, and weight average molecular weight (Mw) of about 50,000 g/mol or greater, according to GPC-4D.
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公开(公告)号：US10450392B2
公开(公告)日：2019-10-22
申请号：US15641876
申请日：2017-07-05
IPC分类号： C08F210/06 , C08F2/42 , C08F6/00
摘要： This disclosure describes polymerization processes and processes for quenching polymerization reactions using high molecular weight polyhydric quenching agents.
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公开(公告)号：US20180030177A1
公开(公告)日：2018-02-01
申请号：US15641876
申请日：2017-07-05
IPC分类号： C08F210/06
CPC分类号： C08F210/06 , C08F2/42 , C08F6/003 , C08L23/14
摘要： This disclosure describes polymerization processes and processes for quenching polymerization reactions using high molecular weight polyhydric quenching agents.
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公开(公告)号：US11092395B2
公开(公告)日：2021-08-17
申请号：US16764286
申请日：2018-10-17
发明人： Brian R. Greenhalgh , Ronnie D. Bryant , Allison C. Buenemann , Benjamin C. Duff , Philip M. Duvall , Joseph A. Moebus
摘要： Methods of online cleaning of heat exchangers at elevated temperatures are provided. Cleaning of the heat exchanger is achieved through an increasing heat exchanger effluent temperature of a polymer solution together with operating under optimized process conditions provided by a phase diagram constructed for the polymer solution. The separation of polymer from unreacted monomers and solvent in the polymer solution is carried out by raising the temperature of the polymer solution as reactor effluent flowing through the heat exchanger. Then, subsequently and by reducing pressure of the heat exchanger effluent, the polymer solution separates into two liquid phases.
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公开(公告)号：US10941228B2
公开(公告)日：2021-03-09
申请号：US16569811
申请日：2019-09-13
IPC分类号： C08F210/06 , C08F2/42 , C08F6/00
摘要： This disclosure describes polymerization processes and processes for quenching polymerization reactions using high molecular weight polyhydric quenching agents.
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公开(公告)号：US20200370849A1
公开(公告)日：2020-11-26
申请号：US16764286
申请日：2018-10-17
发明人： Brian R. Greenhalgh , Ronnie D. Bryant , Allison C. Buenemann , Benjamin C. Duff , Philip M. Duvall , Joseph A. Moebus
摘要： Methods of online cleaning of heat exchangers at elevated temperatures are provided. Cleaning of the heat exchanger is achieved through an increasing heat exchanger effluent temperature of a polymer solution together with operating under optimized process conditions provided by a phase diagram constructed for the polymer solution. The separation of polymer from unreacted monomers and solvent in the polymer solution is carried out by raising the temperature of the polymer solution as reactor effluent flowing through the heat exchanger. Then, subsequently and by reducing pressure of the heat exchanger effluent, the polymer solution separates into two liquid phases.
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