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    POLYOLEFIN PROCESS MONITORING AND CONTROL
    3.
    发明公开
    POLYOLEFIN PROCESS MONITORING AND CONTROL 审中-公开

    公开(公告)号：US20230183402A1

    公开(公告)日：2023-06-15

    申请号：US17931103

    申请日：2022-09-09

    Applicant: Chevron Phillips Chemical Company LP

    Inventor： Paul J. DesLauriers ,  Jeff S. Fodor ,  Eric J. Netemeyer ,  Qing Yang

    IPC: C08F210/16

    CPC classification number: C08F210/16 ,  C08F2400/02

    Abstract: Methods of controlling olefin polymerization reactor systems may include a) selecting n input variables, each input variable corresponding to a process condition for an olefin polymerization process; b) identifying m response variables corresponding to a measurable polymer property; c) adjusting one of more of the n input variables using the olefin polymerization reactor system and measuring each of the m response variables as a function of the input variables for olefin polymers; d) analyzing the change in each of the response variables as a function of the input variables to determine coefficients; e) calculating a Response Surface Model (RSM) for each response variable determined in step d); f) applying n selected input variables to the calculated RSM to predict one or more of m target response variables; and g) using the n selected input variables to operate the olefin polymerization reactor system and provide a polyolefin product.

    DUAL CATALYST SYSTEM FOR PRODUCING POLYETHYLENE WITH LONG CHAIN BRANCHING FOR BLOW MOLDING APPLICATIONS
    7.
    发明申请
    DUAL CATALYST SYSTEM FOR PRODUCING POLYETHYLENE WITH LONG CHAIN BRANCHING FOR BLOW MOLDING APPLICATIONS 有权

    公开(公告)号：US20220127395A1

    公开(公告)日：2022-04-28

    申请号：US17571665

    申请日：2022-01-10

    Applicant: Chevron Phillips Chemical Company LP

    Inventor： Jeremy M. Praetorius ,  Alfred E. Brown, Jr. ,  Yongwoo Inn ,  Youlu Yu ,  Qing Yang ,  Ashish M. Sukhadia

    IPC: C08F210/16 ,  B29C49/00 ,  C08F4/6592

    Abstract: Ethylene-based polymers are characterized by a melt index less than 1 g/10 min, a density from 0.94 to 0.965 g/cm3, a Mw from 100,000 to 250,000 g/mol, a relaxation time from 0.5 to 3 sec, and an average number of long chain branches (LCBs) per 1,000,000 total carbon atoms in a molecular weight range of 300,000 to 900,000 g/mol that is greater than that in a molecular weight range of 1,000,000 to 2,000,000 g/mol, or an average number of LCBs per 1,000,000 total carbon atoms in a molecular weight range of 1,000,000 to 2,000,000 g/mol of less than or equal to about 5 and a maximum ratio of ηE/3η at an extensional rate of 0.1 sec−1 from 1.2 to 10. These polymers have substantially no long chain branching in the high molecular weight fraction of the polymer, but instead have significant long chain branching in a lower molecular weight fraction, such that polymer melt strength and parison stability are maintained for the fabrication of blow molded products and other articles of manufacture. These ethylene polymers can be produced using a dual catalyst system containing a single or two atom bridged metallocene compound with two indenyl groups, and a single atom bridged metallocene compound with a fluorenyl group and a cyclopentadienyl group.

    DUAL CATALYST SYSTEM FOR PRODUCING POLYETHYLENE WITH LONG CHAIN BRANCHING FOR BLOW MOLDING APPLICATIONS
    9.
    发明申请
    DUAL CATALYST SYSTEM FOR PRODUCING POLYETHYLENE WITH LONG CHAIN BRANCHING FOR BLOW MOLDING APPLICATIONS 有权

    公开(公告)号：US20210388130A1

    公开(公告)日：2021-12-16

    申请号：US16898502

    申请日：2020-06-11

    Applicant: Chevron Phillips Chemical Company LP

    Inventor： Jeremy M. Praetorius ,  Alfred E. Brown, JR. ,  Yongwoo Inn ,  Youlu Yu ,  Qing Yang ,  Ashish M. Sukhadia

    IPC: C08F210/16 ,  B29C49/00 ,  C08F4/6592

    Abstract: Ethylene-based polymers are characterized by a melt index less than 1 g/10 min, a density from 0.94 to 0.965 g/cm3, a Mw from 100,000 to 250,000 g/mol, a relaxation time from 0.5 to 3 sec, and an average number of long chain branches (LCBs) per 1,000,000 total carbon atoms in a molecular weight range of 300,000 to 900,000 g/mol that is greater than that in a molecular weight range of 1,000,000 to 2,000,000 g/mol, or an average number of LCBs per 1,000,000 total carbon atoms in a molecular weight range of 1,000,000 to 2,000,000 g/mol of less than or equal to about 5 and a maximum ratio of ηE/3η at an extensional rate of 0.1 sec−1 from 1.2 to 10. These polymers have substantially no long chain branching in the high molecular weight fraction of the polymer, but instead have significant long chain branching in a lower molecular weight fraction, such that polymer melt strength and parison stability are maintained for the fabrication of blow molded products and other articles of manufacture. These ethylene polymers can be produced using a dual catalyst system containing a single or two atom bridged metallocene compound with two indenyl groups, and a single atom bridged metallocene compound with a fluorenyl group and a cyclopentadienyl group.

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