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    Polyolefin process monitoring and control
    1.
    发明授权
    Polyolefin process monitoring and control 有权

    公开(公告)号：US11453733B2

    公开(公告)日：2022-09-27

    申请号：US16386794

    申请日：2019-04-17

    Applicant: Chevron Phillips Chemical Company LP

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

    IPC: C08F210/16 ,  C08F2/00

    Abstract: Methods of controlling olefin polymerization reactor systems are provided herein. In some aspects, the methods include a) selecting n input variables, each input variable corresponding to a process condition for an olefin polymerization process; b) identifying m response variables, each response variable corresponding to a measurable polymer property; c) adjusting one of more of the n input variables in a plurality of polymerization reactions using the olefin polymerization reactor system, to provide a plurality of olefin polymers and measuring each of the m response variables as a function of the input variables for each olefin polymer; d) analyzing the change in each of the response variables as a function of the input variables to determine the coefficients; e) calculating a Response Surface Model (RSM) using general equations for each response variable determined in step d) to correlate any combination of the n input variables with one or more of m response variables; f) applying n selected input variables to the calculated Response Surface Model (RSM) to predict one or more of m target response variables, each target response variable corresponding to a measurable polymer property; and g) using the n selected input variables Is1 to Isn to operate the olefin polymerization reactor system and provide a polyolefin product.

    Controlling Melt Fracture in Bimodal Resin Pipe
    3.
    发明申请
    Controlling Melt Fracture in Bimodal Resin Pipe 有权
    控制双峰树脂管中的熔体断裂

    公开(公告)号：US20130323450A1

    公开(公告)日：2013-12-05

    申请号：US13660777

    申请日：2012-10-25

    Applicant: CHEVRON PHILLIPS CHEMICAL COMPANY LP

    Inventor： Paul J. DesLauriers ,  Yongwoo Inn ,  Qing Yang ,  Ashish M. Sukhadia ,  David C. Rohlfing ,  Pamela L. Maeger

    IPC: C08F110/02

    CPC classification number: C08F110/02 ,  C08L23/04 ,  C08L23/06 ,  F16L9/00 ,  F16L9/12 ,  G01N3/24 ,  G01N11/04 ,  G06F17/10 ,  G06F19/703 ,  Y10T428/139

    Abstract: A method of preparing a medium-density polyethylene pipe comprising melting a multimodal metallocene-catalyzed polyethylene resin to form a molten polyethylene, wherein the multimodal metallocene-catalyzed polyethylene resin has a density of from about 0.925 g/ml to about 0.942 g/ml, a magnitude of slip-stick greater than about 300 psi, a stress for smooth to matte transition of greater than about 90 kPa of stress, and a shear rate for smooth to matte transition greater than about 10 s−1, wherein the magnitude of slip-stick, stress for smooth to matte transition, and shear rate for smooth to matte transition are determined by a capillary rheology test; and forming the molten polyethylene resin into pipe. A pipe prepared from a multimodal metallocene-catalyzed polyethylene resin having a density of from about 0.925 g/ml to about 0.942 g/ml, a magnitude of slip-stick greater than about 300 psi; a stress for smooth to matte transition of greater than about 90 kPa, and a shear rate for smooth to matte transition greater than about 10 s−1, wherein the magnitude of slip-stick, stress for smooth to matte transition, and shear rate for smooth to matte transition are determined by a capillary rheology test.

    Abstract translation: 一种制备中密度聚乙烯管的方法，包括熔化多峰茂金属催化的聚乙烯树脂以形成熔融聚乙烯，其中多峰茂金属催化的聚乙烯树脂的密度为约0.925g / ml至约0.942g / ml， 大于约300psi的滑棒的大小，大于约90kPa应力的平滑无光泽转变的应力和大于约10s -1的平滑到无光泽转变的剪切速率，其中滑移的大小 通过毛细管流变学测试确定平滑无光泽过渡的应力和平滑到无光泽过渡的剪切速率; 并将熔融的聚乙烯树脂形成管。 由密度为约0.925g / ml至约0.942g / ml的多峰金属茂催化的聚乙烯树脂制备的管，滑棒的大小大于约300psi; 大于约90kPa的平滑无光泽转变的应力，以及大于约10s -1的平滑到无光泽转变的剪切速率，其中滑棒的大小，光滑到无光泽的转变的应力和剪切速率 通过毛细管流变学测试确定光滑的无光泽转变。

    POLYOLEFIN PROCESS MONITORING AND CONTROL
    5.
    发明申请
    POLYOLEFIN PROCESS MONITORING AND CONTROL 审中-公开

    公开(公告)号：US20200332035A1

    公开(公告)日：2020-10-22

    申请号：US16386794

    申请日：2019-04-17

    Applicant: Chevron Phillips Chemical Company LP

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

    IPC: C08F210/16

    Abstract: Methods of controlling olefin polymerization reactor systems are provided herein. In some aspects, the methods include a) selecting n input variables, each input variable corresponding to a process condition for an olefin polymerization process; b) identifying m response variables, each response variable corresponding to a measurable polymer property; c) adjusting one of more of the n input variables in a plurality of polymerization reactions using the olefin polymerization reactor system, to provide a plurality of olefin polymers and measuring each of the m response variables as a function of the input variables for each olefin polymer; d) analyzing the change in each of the response variables as a function of the input variables to determine the coefficients; e) calculating a Response Surface Model (RSM) using general equations for each response variable determined in step d) to correlate any combination of the n input variables with one or more of m response variables; f) applying n selected input variables to the calculated Response Surface Model (RSM) to predict one or more of m target response variables, each target response variable corresponding to a measurable polymer property; and g) using the n selected input variables Is1 to Isn to operate the olefin polymerization reactor system and provide a polyolefin product.

    POLYOLEFIN PROCESS MONITORING AND CONTROL
    7.
    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.

    Advanced quality control tools for manufacturing bimodal and multimodal polyethylene resins
    8.
    发明授权
    Advanced quality control tools for manufacturing bimodal and multimodal polyethylene resins 有权

    公开(公告)号：US11098139B2

    公开(公告)日：2021-08-24

    申请号：US15908033

    申请日：2018-02-28

    Applicant: Chevron Phillips Chemical Company LP

    Inventor： Youlu Yu ,  Paul J. DesLauriers ,  Yongwoo Inn

    IPC: C08F10/02 ,  B01J19/00 ,  B01J19/24

    Abstract: A method of determining multimodal polyethylene quality comprising the steps of (a) providing a multimodal polyethylene resin sample; (b) determining, in any sequence, the following: that the multimodal polyethylene resin sample has a melt index within 30% of a target melt index; that the multimodal polyethylene resin sample has a density within 2.5% of a target density; that the multimodal polyethylene resin sample has a dynamic viscosity deviation (% MVD) from a target dynamic viscosity of less than about 100%; that the multimodal polyethylene resin sample has a weight average molecular weight (Mw) deviation (% MwD) from a target Mw of less than about 20%; and that the multimodal polyethylene resin sample has a gel permeation chromatography (GPC) curve profile deviation (% GPCD) from a target GPC curve profile of less than about 15%; and (c) responsive to step (b), designating the multimodal polyethylene resin sample as a high quality resin.

    Advanced Quality Control Tools for Manufacturing Bimodal and Multimodal Polyethylene Resins
    9.
    发明申请
    Advanced Quality Control Tools for Manufacturing Bimodal and Multimodal Polyethylene Resins 审中-公开

    公开(公告)号：US20190263943A1

    公开(公告)日：2019-08-29

    申请号：US15908033

    申请日：2018-02-28

    Applicant: Chevron Phillips Chemical Company LP

    Inventor： Youlu Yu ,  Paul J. DesLauriers ,  Yongwoo Inn

    IPC: C08F10/02 ,  B01J19/00 ,  B01J19/24

    Abstract: A method of determining multimodal polyethylene quality comprising the steps of (a) providing a multimodal polyethylene resin sample; (b) determining, in any sequence, the following: that the multimodal polyethylene resin sample has a melt index within 30% of a target melt index; that the multimodal polyethylene resin sample has a density within 2.5% of a target density; that the multimodal polyethylene resin sample has a dynamic viscosity deviation (% MVD) from a target dynamic viscosity of less than about 100%; that the multimodal polyethylene resin sample has a weight average molecular weight (Mw) deviation (% MwD) from a target Mw of less than about 20%; and that the multimodal polyethylene resin sample has a gel permeation chromatography (GPC) curve profile deviation (% GPCD) from a target GPC curve profile of less than about 15%; and (c) responsive to step (b), designating the multimodal polyethylene resin sample as a high quality resin.

    Controlling Melt Fracture in Bimodal Resin Pipe
    10.
    发明申请
    Controlling Melt Fracture in Bimodal Resin Pipe 审中-公开
    控制双峰树脂管中的熔体断裂

    公开(公告)号：US20130325363A1

    公开(公告)日：2013-12-05

    申请号：US13660750

    申请日：2012-10-25

    Applicant: CHEVRON PHILLIPS CHEMICAL COMPANY LP

    Inventor： Paul J. DesLauriers ,  Yongwoo Inn ,  Qing Yang ,  Ashish M. Sukhadia ,  David C. Rohlfing

    IPC: G06F19/00 ,  G01N3/24

    CPC classification number: C08F110/02 ,  C08L23/04 ,  C08L23/06 ,  F16L9/00 ,  F16L9/12 ,  G01N3/24 ,  G01N11/04 ,  G06F17/10 ,  G16C20/20 ,  Y10T428/139

    Abstract: A system for improving processing of polyethylene resins, comprising a processor; a memory; an output device; and an analysis component stored in the memory, that when executed on the processor, configures the processor to receive a shear stress as a function of shear rate for a plurality of multimodal metallocene-catalyzed polyethylene samples, wherein the determination of the shear stress as a function of the shear rate comprises using capillary rheometry; determine values for a magnitude of slip-stick, a stress for smooth to matte transition, and a shear rate for smooth to matte transition for each of the plurality of multimodal metallocene-catalyzed polyethylene samples based on the shear stress and the shear rate measured from capillary rheometry; identify individual multimodal metallocene-catalyzed polyethylene resins from the plurality of multimodal metallocene-catalyzed polyethylene samples having a reduced tendency to melt fracture characterized by a magnitude of slip-stick greater than about 300 psi, a stress for smooth to matte transition greater than about 90 kPa, and a shear rate for smooth to matte transition greater than about 10 s−1; and output an identification of the individual multimodal metallocene-catalyzed polyethylene resins to the output device.

    Abstract translation: 一种用于改善聚乙烯树脂加工的系统，包括处理器; 记忆 输出设备; 以及存储在所述存储器中的分析组件，当在所述处理器上执行时，所述分析组件将所述处理器配置为接受剪切应力作为多个多峰茂金属催化的聚乙烯样品的剪切速率的函数，其中所述剪切应力的确定为 剪切速率的函数包括使用毛细管流变学; 基于剪切应力和剪切速率，确定滑移棒的大小，平滑到无光泽过渡的应力值，以及用于多个多峰茂金属催化的聚乙烯样品中的每一个的光滑到无光泽转变的剪切速率 毛细血管流变学; 从多个多峰茂金属催化的聚乙烯样品中鉴定出具有降低的熔融断裂倾向的单个多峰金属茂催化的聚乙烯树脂，其特征在于大于约300psi的滑棒大小，平滑至无光泽转变的应力大于约90 kPa，以及平滑到无光泽转变的剪切速率大于约10s -1; 并输出单个多峰茂金属催化的聚乙烯树脂的标识到输出装置。

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