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    Ziegler-Natta catalyst deactivation and neutralization
    11.
    发明授权
    Ziegler-Natta catalyst deactivation and neutralization 有权

    公开(公告)号：US11236182B2

    公开(公告)日：2022-02-01

    申请号：US16977287

    申请日：2019-03-25

    Applicant: Dow Global Technologies LLC

    Inventor： Evelyn Auyeung ,  Sean W. Ewart ,  Daniela Ferrari ,  Thomas Davidian ,  Rony Vanspeybroeck

    IPC: C08F10/02 ,  C08F2/06 ,  C08F6/02 ,  C08F2/42 ,  C08F110/14

    Abstract: A solution polymerization process for producing ethylene-based polymer includes introducing ethylene monomer, hydrocarbon solvent, and Ziegler-Natta catalyst into an entrance of a solution polymerization reactor. An ethylene-based polymer is produced by solution polymerizing the ethylene monomer in hydrocarbon solvent. Subsequently, a catalyst deactivator is introduced into x the exit of the solution polymerization reactor, thereby producing hydrochloric acid byproduct. The catalyst deactivator includes long chain carboxylate and at least one cation selected from Groups 1, 2, and 12 of the IUPAC periodic table, with the exception of calcium. The catalyst deactivator reduces the effectiveness of the Ziegler-Natta catalyst and neutralizes the hydrochloric acid by forming a chloride salt other than calcium chloride.

    APPARATUS AND METHOD OF USE THEREOF
    12.
    发明申请
    APPARATUS AND METHOD OF USE THEREOF 有权

    公开(公告)号：US20210215432A1

    公开(公告)日：2021-07-15

    申请号：US17059726

    申请日：2019-05-30

    Applicant: Dow Global Technologies LLC

    Inventor： Maria Pollard ,  Sean W. Ewart ,  Mark B. Davis ,  Bradley K. Blanchard

    IPC: F28D9/00 ,  C08F6/00 ,  C08F6/12 ,  F28F3/08

    Abstract: Disclosed herein is an apparatus comprising a shell; the shell having an inlet port for introducing a polymer solution into the shell and an outlet port for removing the polymer solution from the shell; wherein the polymer solution comprises a polymer and a solvent that is operative to dissolve the polymer; a plurality of plates in the shell; where the plurality of plates is stacked one atop the other to define a central passage that is in fluid communication with the inlet port of the shell; where the plurality of plates further defines a plurality of conduits, each conduit extending radially outwards from the central passage, where the plurality of conduits is in fluid communication with the central passage; and where the apparatus is operated at a pressure and a temperature effective to maintain the polymer solution in a single phase during its travel through the apparatus.

    Process to visbreak propylene-based polymers with C—C initiators
    14.
    发明授权
    Process to visbreak propylene-based polymers with C—C initiators 有权

    公开(公告)号：US10316115B2

    公开(公告)日：2019-06-11

    申请号：US15100510

    申请日：2014-12-17

    Applicant: Dow Global Technologies LLC

    Inventor： Teresa P. Karjala ,  Sean W. Ewart ,  Mehmet Demirors ,  Michael W. Tilston

    IPC: C08F8/50 ,  C08L23/10

    Abstract: The invention provides a process to prepare a second propylene-based polymer from a first propylene-based polymer, each propylene-based polymer having a melt flow rate (MFR; 2.16 kg/230° C.) with the MFR of the second propylene-based polymer greater than the MFR of the first propylene-based polymer, the process comprising the step of contacting under visbreaking conditions the first propylene-based polymer with at least one carbon-carbon (C—C) free-radical initiator of Structure (I): (Structure (I)) wherein R1, R2, R3, R4, R5 and R6 are each, independently, a hydrocarbyl group or a substituted hydrocarbyl group, and wherein, optionally, two or more R groups (R1, R2, R3, R4, R5 and R6) form a ring structure.

    PROCESSES TO IMPROVE REACTOR STABILITY FOR THE PREPARATION OF ETHYLENE-BASED POLYMERS USING ASYMMETRICAL POLYENES
    20.
    发明申请
    PROCESSES TO IMPROVE REACTOR STABILITY FOR THE PREPARATION OF ETHYLENE-BASED POLYMERS USING ASYMMETRICAL POLYENES 有权
    使用不对称聚酯制备基于乙烯的聚合物来提高反应器稳定性的方法

    公开(公告)号：US20160304643A1

    公开(公告)日：2016-10-20

    申请号：US15101347

    申请日：2014-12-23

    Applicant: DOW GLOBAL TECHNOLOGIES LLC

    Inventor： Christopher R. Eddy ,  John O. Osby ,  Sean W. Ewart ,  Sarat Munjal ,  Stefan Hinrichs ,  Otto J. Berbee

    IPC: C08F210/02

    CPC classification number: C08F210/02 ,  C08F2220/282 ,  C08F2220/281 ,  C08F2/38

    Abstract: The invention provides a process to form an ethylene-based polymer, said process comprising polymerizing ethylene and at least one asymmetrical polyene, comprising an “alpha, beta unsaturated—carbonyl end” and a “C—C double bond end,” and wherein the polymerization takes place in the presence of at least one free-radical initiator, and wherein the polymerization takes place in a reactor configuration comprising at least two reaction zones, reaction zone 1 and reaction zone i (i≧2), wherein reaction zone i is downstream from reaction zone 1; and wherein at least one chain transfer agent (CTA) is added to the polymerization, and wherein the CTA is a saturated hydrocarbon or an unsaturated hydrocarbon.

    Abstract translation: 本发明提供一种形成乙烯基聚合物的方法，所述方法包括聚合乙烯和至少一种不对称多烯，其包含“α，β不饱和羰基末端”和“C-C双键末端”，其中 在至少一种自由基引发剂的存在下进行聚合，并且其中聚合在包括至少两个反应区，反应区1和反应区i（i≥2）的反应器构型中进行，其中反应区i为 在反应区1的下游; 并且其中向所述聚合中加入至少一种链转移剂（CTA），并且其中所述CTA为饱和烃或不饱和烃。

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