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    Devolatilization apparatus and process
    2.
    发明授权
    Devolatilization apparatus and process 有权

    公开(公告)号：US11976154B2

    公开(公告)日：2024-05-07

    申请号：US17152440

    申请日：2021-01-19

    Applicant: ExxonMobil Chemical Patents Inc.

    Inventor： Michael K. Lyon ,  Hamidreza Khakdaman ,  Trevan D. MacArthur ,  Adrian Strehler ,  Claudio Walker

    IPC: C08F6/10 ,  B01D1/22 ,  B01D19/00 ,  C08F2/01 ,  C08F2/06

    CPC classification number: C08F6/10 ,  B01D1/221 ,  B01D19/0036 ,  C08F2/01 ,  C08F2/06

    Abstract: In at least one embodiment, a devolatilization vessel includes a first set of one or more devolatilization plates and a second set of one or more devolatilization plates. A first distributor is above the first set of one or more devolatilization plates and the second set of one or more devolatilization plates. A second distributor is above the second set of one or more devolatilization plates. In at least one embodiment, a process of forming a polymer includes forming a first polymer solution having a first viscosity and forming a second polymer solution having a second viscosity. The process includes flowing the first polymer solution and the second polymer solution to a devolatilization vessel. The process includes removing volatiles from the first polymer solution and the second polymer solution in the devolatilization vessel to form a devolatilized first polymer melt and a devolatilized second polymer melt.

    Processes and apparatus for bimodal slurry polymerization
    5.
    发明授权
    Processes and apparatus for bimodal slurry polymerization 有权

    公开(公告)号：US11117979B2

    公开(公告)日：2021-09-14

    申请号：US16998251

    申请日：2020-08-20

    Applicant: ExxonMobil Chemical Patents Inc.

    Inventor： Keith W. Trapp ,  Scott T. Roger ,  James A. Kendrick ,  Edward F. Smith

    IPC: C08F2/01 ,  B01D5/00 ,  B01J8/00 ,  B01J19/24 ,  C08F2/06 ,  C08F6/02 ,  C08F6/10 ,  C08F110/02 ,  C08F210/16

    Abstract: Processes and apparatus for preparing bimodal polymers are provided. In some embodiments, processes include introducing a monomer, a first diluent, a catalyst, hydrogen, at a first hydrogen concentration, and optional comonomer, to a first loop reactor to produce, under polymerization conditions, a first slurry of polymer solids. Processes may also include continuously discharging the first slurry of polymer solids from the loop reactor as a first polymerization effluent to a first flash tank; separating the first polymerization effluent in the first flash tank to provide a first concentrated polymer slurry with significantly lower hydrogen concentration; and transferring the first concentrated polymer slurry from the flash tank to a re-slurry mixer. Processes may further include introducing a re-slurry mixer diluent to the first concentrated polymer slurry to form a second concentrated polymer slurry in the re-slurry mixer that can be pumped to a second slurry loop reactor.

    Process for efficient polymer particle purging
    6.
    发明授权
    Process for efficient polymer particle purging 有权

    公开(公告)号：US11104749B2

    公开(公告)日：2021-08-31

    申请号：US16332009

    申请日：2017-09-11

    Applicant: W. R. GRACE & CO.-CONN.

    Inventor： Jan W. Van Egmond ,  Jeffrey D. Goad ,  John K. Kaarto ,  Daniel J. Chismar

    IPC: C08F2/01 ,  C08F6/02 ,  C08F6/10 ,  C08F6/00 ,  B01J8/18 ,  B01J8/26

    Abstract: A process comprising polymerizing olefin monomers and optionally comonomers in a first reactor vessel, thereby forming a raw product stream comprising polymerized solids, unreacted monomer and optionally comonomer, the polymerized solids comprising olefin polymer, volatile organic compounds (VOC) and catalyst system. Then the polymerized solids are contacted with a catalyst poison selected from carbon monoxide, carbon dioxide, oxygen, water, alcohols, amines, or mixtures thereof, thereby forming a passivated stream. The passivated stream is maintained in an agitated state within a second reactor. The passivated stream within the second reactor is then contacted with a circulating gas comprising unreacted monomer for a residence time, thereby reducing the concentration of VOC in the polymerized solids by at least 10 wt % compared to the level before entering the second reactor, thereby forming a purified olefin polymer solids stream.

    DEVOLATILIZER DESIGN
    7.
    发明申请
    DEVOLATILIZER DESIGN 有权

    公开(公告)号：US20210246235A1

    公开(公告)日：2021-08-12

    申请号：US17059776

    申请日：2019-05-31

    Applicant: Dow Global Technologies LLC

    Inventor： Maria Pollard ,  Irfan Khan ,  Shrikant Dhodapkar ,  Martin Lopez ,  Quan Yuan

    IPC: C08F6/10 ,  B01D1/22 ,  B01D3/06

    Abstract: A devolatilizer (devo), which operates at a temperature (T) and at a pressure (P), for the separation of at least a portion of a solvent from a polymer-rich solution comprising the solvent and a polymer, and wherein the devolatilizer comprises at least the following components: A) a distributor, a heater, or a heater/distributor combination; B) a shroud (component B) located around some or all of the periphery of component A; and C) a gap (component C) located between the outer surface of component A and the inner surface of component B.

    Process for obtaining low volatile plastomers
    9.
    发明授权
    Process for obtaining low volatile plastomers 有权

    公开(公告)号：US11034784B2

    公开(公告)日：2021-06-15

    申请号：US16346983

    申请日：2017-09-21

    Applicant: Borealis AG

    Inventor： Mohammad Al-Haj Ali ,  Michiel Bergstra ,  Stefan Hochradl ,  Velichko Hristov ,  Alexander Standler

    IPC: C08F6/00 ,  C08F210/16 ,  C08F210/00 ,  C08F6/10

    Abstract: A process for reducing the volatile organic compound content of granular plastomers having a density of equal to or lower than 883 kg/m3 and a MFR2 of 100.0 g/10 min or lower (ISO 1133 at 2.16 kg load and 190° C.), to below 65 ppm (VOC, VDA277), the process comprising the steps of providing a granular raw plastomer in a treatment vessel, the granular raw plastomer having a density of equal to or lower than 883 kg/m3, and a MFR2 of 100.0 g/10 min or lower (ISO 1133 at 2.16 kg load and 190° C.), and a volatile organic compound content (VOC, VDA277) of above 150 ppm, subjecting said granular raw plastomer to a gasflow within the range of 30 m3/(h t) to 150 m3/(h t) for an aeration time of less than 96 hours, whereby the gas has a minimum temperature of at least 26° C. measured at a gas inlet of the treatment vessel and a maximum temperature of 4° C. below the Vicat temperature (10 N, ISO 306) of the granular raw plastomer or 35° C. measured at the gas inlet of the treatment vessel, whatever value is lower; and recovering the granular plastomer.

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