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公开(公告)号：US09815913B2
公开(公告)日：2017-11-14
申请号：US15144493
申请日：2016-05-02
IPC分类号： C08F2/04 , C08F210/18 , C08F210/16 , C08F6/00 , C08F6/12
CPC分类号： C08F2/04 , C08F6/003 , C08F6/12 , C08F210/16 , C08F210/18 , C08F2400/02 , C08F210/06 , C08F236/20 , C08F2/00
摘要： Described herein are methods for continuous solution polymerization. The method may comprise polymerizing one or more monomers and comonomers in the presence of a solvent in a polymerization reactor to produce a polymer solution; determining the composition of the polymer solution exiting the polymerization reactor in an on-line fashion; determining at least one of the critical pressure or critical temperature; comparing the critical pressure and/or critical temperature to the actual temperature of the polymer solution and the actual pressure of the polymer solution; heating or cooling the polymer solution to a temperature within 50° C. of the critical temperature; and passing the polymer solution through a pressure letdown valve into a liquid-liquid separator, where the pressure of the polymer solution is reduced or raised to a pressure within 50 psig of the critical pressure to induce a separation of the polymer solution into two liquid phases.
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公开(公告)号：US20160362506A1
公开(公告)日：2016-12-15
申请号：US15144493
申请日：2016-05-02
CPC分类号： C08F2/04 , C08F6/003 , C08F6/12 , C08F210/16 , C08F210/18 , C08F2400/02 , C08F210/06 , C08F236/20 , C08F2/00
摘要： Described herein are methods for continuous solution polymerization. The method may comprise polymerizing one or more monomers and comonomers in the presence of a solvent in a polymerization reactor to produce a polymer solution; determining the composition of the polymer solution exiting the polymerization reactor in an on-line fashion; determining at least one of the critical pressure or critical temperature; comparing the critical pressure and/or critical temperature to the actual temperature of the polymer solution and the actual pressure of the polymer solution; heating or cooling the polymer solution to a temperature within 50° C. of the critical temperature; and passing the polymer solution through a pressure letdown valve into a liquid-liquid separator, where the pressure of the polymer solution is reduced or raised to a pressure within 50 psig of the critical pressure to induce a separation of the polymer solution into two liquid phases.
摘要翻译： 这里描述的是连续溶液聚合的方法。 该方法可以包括在溶剂存在下在聚合反应器中聚合一种或多种单体和共聚单体以产生聚合物溶液; 以在线方式测定离开聚合反应器的聚合物溶液的组成; 确定临界压力或临界温度中的至少一个; 将临界压力和/或临界温度与聚合物溶液的实际温度和聚合物溶液的实际压力进行比较; 将聚合物溶液加热或冷却至临界温度的50℃以内的温度; 并将聚合物溶液通过压力降压阀进入液 - 液分离器，其中聚合物溶液的压力降低或升高到临界压力的50psig以内的压力，以引起聚合物溶液分离成两个液相 。
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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：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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