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公开(公告)号：US20210214470A1
公开(公告)日：2021-07-15
申请号：US17059704
申请日：2019-05-30
Applicant: Dow Global Technologies LLC
Inventor： Maria Pollard , Robert D. Swindoll , Pradeep Jain , Alec Y. Wang , Jorge Rubalcaba , Shrikant Dhodapkar , Sean W. Ewart , Bradley K. Blanchard , George W. Haun, Jr. , Michael J. Zogg, Jr.
Abstract: Disclosed herein is a system for solution polymerization comprising a reactor system that is operative to receive a monomer and to react the monomer to form a polymer; a plurality of devolatilization vessels located downstream of the reactor system, where each devolatilization vessel operates at a lower pressure than the preceding devolatilization vessel; and a heat exchanger disposed between two devolatilization vessels and in fluid communication with them, where the heat exchanger has an inlet port temperature of 100° C. to 230° C., an outlet port temperature of 200° C. to 300° C., an inlet port pressure of 35 to 250 kgf/cm2 and an outlet port pressure of 20 to 200 kgf/cm2; and wherein the polymer solution remains in a single phase during its residence in the heat exchanger.
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公开(公告)号：US20140256900A1
公开(公告)日：2014-09-11
申请号：US14344017
申请日：2012-09-25
Applicant: Dow Global Technologies LLC
Inventor： Gary A. Camp , Mitch Juneau , Robert D. Swindoll
IPC: C08F210/16
CPC classification number: C08F210/16 , B01J2219/00006 , C08F2/01 , C08F10/00 , C08F2/00 , C08F210/14
Abstract: The present invention provides a system and process for olefin polymerization. The inventive system and process for olefin polymerization facilitate lower operating vacuum pressures in the polymer recovery system by requiring at least two sequential condensing units, wherein at least one of the condensing units operates at significantly lower temperature ranges than the temperature ranges at which the current systems operate.
Abstract translation: 本发明提供了烯烃聚合的系统和方法。 用于烯烃聚合的本发明系统和方法通过要求至少两个连续的冷凝单元来促进聚合物回收系统中的较低的操作真空压力，其中至少一个冷凝单元在比当前系统 操作。
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公开(公告)号：US11608390B2
公开(公告)日：2023-03-21
申请号：US17059704
申请日：2019-05-30
Applicant: Dow Global Technologies LLC
Inventor： Maria Pollard , Robert D. Swindoll , Pradeep Jain , Alec Y. Wang , Jorge Rubalcaba , Shrikant Dhodapkar , Sean W. Ewart , Bradley K. Blanchard , George W. Haun, Jr. , Michael J. Zogg, Jr.
Abstract: Disclosed herein is a system for solution polymerization comprising a reactor system that is operative to receive a monomer and to react the monomer to form a polymer; a plurality of devolatilization vessels located downstream of the reactor system, where each devolatilization vessel operates at a lower pressure than the preceding devolatilization vessel; and a heat exchanger disposed between two devolatilization vessels and in fluid communication with them, where the heat exchanger has an inlet port temperature of 100° C. to 230° C., an outlet port temperature of 200° C. to 300° C., an inlet port pressure of 35 to 250 kgf/cm2 and an outlet port pressure of 20 to 200 kgf/cm2; and wherein the polymer solution remains in a single phase during its residence in the heat exchanger.
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公开(公告)号：US10329399B2
公开(公告)日：2019-06-25
申请号：US15535801
申请日：2015-11-09
Applicant: DOW GLOBAL TECHNOLOGIES LLC
Inventor： John G. Pendergast, Jr. , Johnny W. Masey , Robert D. Swindoll , Yujun Liu
Abstract: Disclosed herein is a system for recovering olefins from a vent stream comprising an absorber; and a stripper; where the absorber and the stripper are in a recycle loop; and where the absorber is operative to treat a vent stream with a solvent to remove more than 99 wt % of a halogenated by-product contained in the vent stream and to recover 90 to 95 wt % of olefin molecules present in the vent stream; and where the stripper is operative to remove more than 99 wt % of the halogenated by-products present in the solvent; and where the solvent is recycled to the absorber.
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