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    High pressure, free radical polymerizations to produce ethylene-based polymers
    21.
    发明授权
    High pressure, free radical polymerizations to produce ethylene-based polymers 有权

    公开(公告)号：US11078301B2

    公开(公告)日：2021-08-03

    申请号：US16302806

    申请日：2017-06-22

    Applicant: Dow Global Technologies LLC

    Inventor： Cornelis J F Hosman ,  Nhi T. Y. Dang ,  Otto J. Berbee ,  Joaquin Flores

    IPC: C08F2/34 ,  B01J12/00 ,  C08F2/01 ,  B01J3/02 ,  B01J3/04 ,  C08F6/00 ,  C08F10/02 ,  A46B11/06 ,  B05C17/005 ,  C08F2/00 ,  C08F210/02

    Abstract: A high pressure polymerization, as described herein, to form an ethylene-based polymer, comprising the following steps: polymerizing a reaction mixture comprising ethylene, using a reactor system comprising at least three ethylene-based feed streams and a reactor configuration that comprises at least four reaction zones, and at least one of the following a) through c), is met: (a) up to 100 wt % of the ethylene stream to the first zone comes from a high pressure recycle, and/or up to 100 wt % of the last ethylene stream to a zone comes from the output from a Primary compressor system; and/or (b) up to 100 wt % of the ethylene stream to first zone comes from the output from a Primary compressor system, and/or up to 100 wt % of the last ethylene stream to a zone comes from a high pressure recycle; and/or (c) the ethylene stream to the first zone, and/or the last ethylene stream to a zone, each comprises a controlled composition; and wherein each ethylene stream to a zone receives an output from two or more cylinders of the last compressor stage of a Hyper compressor system.

    Process for making high pressure free radical ethylene copolymers
    22.
    发明授权
    Process for making high pressure free radical ethylene copolymers 有权

    公开(公告)号：US10941220B2

    公开(公告)日：2021-03-09

    申请号：US16307371

    申请日：2017-06-23

    Applicant: Dow Global Technologies LLC

    Inventor： Otto J. Berbee ,  Stefan Hinrichs ,  Hayley A. Brown ,  Bharat I. Chaudhary ,  John O. Osby ,  Teresa P. Karjala

    IPC: C08F218/08 ,  C08F2/01 ,  C08F2/00 ,  B01J19/24 ,  C08F210/02 ,  C08F210/16 ,  C08F230/08

    Abstract: A high pressure polymerization process to form an ethylene-based polymer, the process comprising at least the following step: polymerizing a reaction mixture comprising ethylene and at least one comonomer, using a reactor system comprising a reactor configuration, and the following: (A) at least two reaction zones, a zone (reaction zone 1) and an ith zone (reaction zone i where i≥2), (B) at least two ethylene-based feed streams, each comprising a percentage of the total make-up ethylene fed to the polymerization process, and wherein a first stream is sent to reaction zone 1 and a second stream is sent to reaction zone i; (C) a control system to control the percentage of the total make-up ethylene in the stream sent to reaction zone 1, and the percentage of the total make-up ethylene in the stream sent to reaction zone i, and wherein the ratio (Q) of the molar concentration of the at least one comonomer fed to the first reaction zone, to the molar concentration of comonomer in the sum of all ethylene-based feeds to the reactor configuration, meets the following Equation 1: 0.23 ln(r1)−2.16≤Q≤−0.25 ln(r1)+2.15 (Equation 1); and wherein the comonomer has a reactivity ratio (r1) as follow: 0.3≤r1≤5.0, and a boiling point (1 atm)≤150° C.

    High pressure free radical polymerizations
    23.
    发明授权
    High pressure free radical polymerizations 有权

    公开(公告)号：US10696757B2

    公开(公告)日：2020-06-30

    申请号：US15769285

    申请日：2016-11-10

    Applicant: Dow Global Technologies LLC

    Inventor： Otto J. Berbee ,  Joaquin Flores ,  Cornelis J F Hosman ,  Nhi Dang

    IPC: C08F10/02 ,  C08F2/01 ,  C08F2/38

    Abstract: A process is provided to form an ethylene-based polymer, in the presence of at least one free-radical, said process comprises at least the following: polymerizing a mixture comprising ethylene, in a reactor configuration comprising at least three reaction zones, and comprising two ethylene feed streams, and wherein the ratio (RLCBf40%), in percent, of the “LCB content of the first 40 wt % of the total polymer formed” to “the total LCB content in the final polymer” is ≤22.5%; and wherein the amount of ethylene, and optionally one or more comonomers, and optionally one or more CTAs, fed to the first reaction zone, is from 40 mole % to 80 mole %, based on the total moles of ethylene, and optionally one or more comonomers, and optionally one or more CTAs, fed to the polymerization.

    High pressure free-radical polymerizations
    25.
    发明授权
    High pressure free-radical polymerizations 有权

    公开(公告)号：US10457757B2

    公开(公告)日：2019-10-29

    申请号：US15574310

    申请日：2016-06-30

    Applicant: Dow Global Technologies LLC

    Inventor： Christopher R. Eddy ,  Jeffery S. Bradley ,  Otto J. Berbee ,  Sarat Munjal ,  Bryan Gutermuth

    IPC: C08F210/02 ,  B01J3/00 ,  B01J3/04

    Abstract: A process to form an ethylene-based polymer comprising, in polymerized form, ethylene and at least one acid comonomer, said process comprising polymerizing a reaction mixture comprising the ethylene and the acid comonomer, in a reactor configuration comprising at least one Secondary compressor, at least one pressurization device, and at least one reactor selected from the following: at least one autoclave reactor, at least one tubular reactor, or a combination thereof; and wherein the reaction mixture is polymerized in the presence of at least one free-radical initiator, and at a pressure of at least 1000 Bar; and wherein at least a portion of a comonomer composition comprising at least a portion of the acid comonomer used in the polymerization, is compressed, to form a compressed comonomer composition, in the pressurization device, up to a discharge pressure ranging from 1000 Bar to 4000 Bar, and at a discharge temperature (DT) from 10 C to 100 C; and wherein the compressed comonomer composition bypasses the Secondary compressor, and is fed, downstream from the Secondary compressor, into the reactor, and/or into one or more feed streams to the reactor.

    Process to control output and quality of ethylene-based polymer formed by high pressure free radical polymerization
    27.
    发明授权
    Process to control output and quality of ethylene-based polymer formed by high pressure free radical polymerization 有权

    公开(公告)号：US10273318B2

    公开(公告)日：2019-04-30

    申请号：US15527853

    申请日：2015-12-18

    Applicant: Dow Global Technologies LLC ,  Dow Brasil Sudeste Industrial Ltda.

    Inventor： Cornelis J F Hosman ,  Otto J. Berbee ,  Sergio E. Goncalves ,  Nhi Dang

    IPC: C08F10/02 ,  C08F2/01 ,  C08F2/34 ,  C08F2/38

    Abstract: The invention provides a process to prepare an ethylene-based polymer, said process comprising polymerizing ethylene in the presence of at least one initiator system selected from the following: a) class 1 initiator system, b) class 2 initiator system, c) class 3 initiator system, or d) a combination thereof; and at a inlet pressure (P2) greater than, or equal to, 1000 Bar (100 MPa); and in a reactor system comprising at least one hyper compressor and a reactor configuration comprising at least one reactor, which comprises at least one reaction zone; and wherein the inlet pressure (P2) is reduced by at least 200 Bar, as compared to a similar polymerization, in the same reactor system, except it is operated at a higher inlet pressure (P1), and at a different hyper compressor throughput, and at a different maximum temperature for at least one reaction zone, and optionally, at a different amount of CTA system fed to the reactor configuration; and wherein, for the process, the “Ratio of total reactor consumption of the highest temperature class initiator system(s) (Y)” meets the following Equation D: 0.95*x^((P1−P2)/10 MPa)

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