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    Apparatus for maintaining unreacted monomer concentration in a polymerization reactor
    32.
    发明授权
    Apparatus for maintaining unreacted monomer concentration in a polymerization reactor 失效
    用于在聚合反应器中保持未反应的单体浓度的装置

    公开(公告)号：US6042790A

    公开(公告)日：2000-03-28

    申请号：US328179

    申请日：1994-10-24

    申请人： John D. Hottovy ,  Frederick C. Lawrence ,  Nelson T. Black

    发明人： John D. Hottovy ,  Frederick C. Lawrence ,  Nelson T. Black

    IPC分类号： B01J19/00 ,  C08F2/00

    CPC分类号： B01J19/0006

    摘要： In a polymerization process utilizing a high pressure flash to separate polymer from unreacted monomer contained in the effluent stream from the reactor, the concentration of unreacted monomer in the reaction effluent is determined by withdrawing from the reactor an effective analyzing amount of effluent, exposing the amount to a low pressure flash and analyzing the vaporized portion to determine the concentration of monomer.

    摘要翻译： 在使用高压闪蒸将聚合物与反应器流出物流中所含的未反应单体分离的聚合方法中，反应流出物中未反应单体的浓度通过从反应器中抽出有效分析量的流出物来确定， 到低压闪蒸并分析汽化部分以确定单体的浓度。

    Ethylene separation
    34.
    发明授权
    Ethylene separation 有权
    乙烯分离

    公开(公告)号：US08410329B2

    公开(公告)日：2013-04-02

    申请号：US12905966

    申请日：2010-10-15

    申请人： John D. Hottovy ,  Ted Cymbaluk

    发明人： John D. Hottovy ,  Ted Cymbaluk

    IPC分类号： C07C7/156 ,  B01D53/14 ,  C08F110/02

    CPC分类号： C08F6/001 ,  B01D53/1487 ,  B01D53/1493 ,  B01D2252/20405 ,  B01D2252/20421 ,  B01D2252/20431 ,  B01D2252/20436 ,  B01D2252/20468 ,  B01D2252/504 ,  B01D2257/7022 ,  C08F10/02 ,  C08F110/02 ,  C08L23/04 ,  C08F2/00

    摘要： A polyethylene production process, comprising contacting ethylene and a polymerization catalyst under suitable reaction conditions to yield a polymerization product stream, separating a light gas stream from the polymerization product stream, wherein the light gas stream comprises ethane and unreacted ethylene, contacting the light gas stream with an absorption solvent system, wherein at least a portion of the ethylene from the light gas stream is absorbed by the absorption solvent system, removing unabsorbed gases of the light gas stream from contact with the absorption solvent system to form a waste gas stream, and recovering ethylene from the absorption solvent system.

    摘要翻译： 一种聚乙烯生产方法，包括在合适的反应条件下使乙烯和聚合催化剂接触以产生聚合产物流，从聚合产物流中分离轻质气体流，其中轻质气流包含乙烷和未反应的乙烯，使轻质气体流 其中吸收溶剂系统，其中来自轻质气体流的乙烯的至少一部分被吸收溶剂系统吸收，除去轻质气体流的未吸收气体与吸收溶剂系统接触以形成废气流，以及 从吸收溶剂体系中回收乙烯。

    System and Method for Measuring Pressure and Flow in a Loop Reactor
    38.
    发明申请
    System and Method for Measuring Pressure and Flow in a Loop Reactor 有权
    用于测量环流反应器中的压力和流量的系统和方法

    公开(公告)号：US20100056732A1

    公开(公告)日：2010-03-04

    申请号：US12198658

    申请日：2008-08-26

    申请人： Robert R. McElvain ,  John D. Hottovy ,  Larry W. Ezell ,  Anurag Gupta

    发明人： Robert R. McElvain ,  John D. Hottovy ,  Larry W. Ezell ,  Anurag Gupta

    IPC分类号： C08F2/01 ,  B01J19/24 ,  G01F1/38

    CPC分类号： B01J19/0006 ,  B01J19/2435 ,  B01J2219/00162 ,  C08F10/00 ,  C08F110/02 ,  C08F2400/02 ,  G01F1/34 ,  G01F1/383 ,  G01F15/125 ,  C08F2/01 ,  C08F2/14

    摘要： A system and method for measuring pressure and flow rate of polymer slurry circulating in a loop reactor. For flow rate measurement, the loop reactor has a pressure tap on an outside radius of an elbow of the loop and a pressure tap on an inside radius of the elbow. The pressure taps incorporate diaphragms. Sensing legs couple the pressure taps with a differential pressure meter configured to provide a signal indicative of the flow rate of the polymer slurry. For pressure measurement, pressure taps without diaphragms at the loop reactor wall may be disposed at various points along the loop reactor, the pressure taps coupled to pressure sensing lines. A diluent flush line having a screen disposed therein may provide diluent to the pressure taps. The screen may reduce fouling of the pressure tap and sensing line with solids from the reactor.

    摘要翻译： 用于测量在环管反应器中循环的聚合物浆料的压力和流速的系统和方法。 对于流量测量，回路反应器具有在环的弯头的外半径上的压力分接头和在肘部的内半径处的压力分接头。 压力开关带有隔膜。 感测腿用配置成提供指示聚合物浆料的流速的信号的差压计耦合压力分接头。 对于压力测量，在环流反应器壁处没有隔膜的压力抽头可以设置在沿着环流反应器的各个点处，压力抽头耦合到压力感测线。 具有设置在其中的筛网的稀释剂冲洗管线可以向压力抽头提供稀释剂。 屏幕可以减少来自反应器的固体的压力分接头和传感线的结垢。

    Polymer transfer within a polymerization system
    39.
    发明授权
    Polymer transfer within a polymerization system 有权
    聚合体系内的聚合物转移

    公开(公告)号：US07109290B2

    公开(公告)日：2006-09-19

    申请号：US11146616

    申请日：2005-06-07

    申请人： Robert R. McElvain ,  John D. Hottovy ,  Bryan M. Garner ,  Gregory G. Hendrikson ,  John H. Tait

    发明人： Robert R. McElvain ,  John D. Hottovy ,  Bryan M. Garner ,  Gregory G. Hendrikson ,  John H. Tait

    IPC分类号： C08F6/00

    CPC分类号： B01J19/2435 ,  B01J8/0015 ,  B01J8/20 ,  B01J2208/00442 ,  B01J2208/00539 ,  B01J2208/00761

    摘要： A method for transferring polymer within a polymerization system, comprising continuously withdrawing the polymer from the reactor and conveying the polymer from a reactor to a flash chamber via a pressure differential between the reactor and the flash chamber. A method for transferring polymer within a polymerization system comprising conveying the polymer from a reactor to a flash chamber via a pressure differential between the reactor and the flash chamber and purging interstitial gases from the polymer prior to conveying the polymer from the flash chamber to a purge column. A method for transferring polymer within a polymerization system comprising conveying the polymer from a flash chamber directly to a purge column via a pressure differential between the flash chamber and the purge column.

    摘要翻译： 一种用于在聚合体系内转移聚合物的方法，包括从反应器连续地抽出聚合物并通过反应器和闪蒸室之间的压差将聚合物从反应器输送到闪蒸室。 一种用于在聚合系统内转移聚合物的方法，包括通过反应器和闪蒸室之间的压差将聚合物从反应器输送到闪蒸室，并在将聚合物从闪蒸室输送到吹扫之前从聚合物中清除间隙气体 柱。 一种用于在聚合体系内转移聚合物的方法，包括通过闪蒸室和净化塔之间的压差将聚合物从闪蒸室直接输送到吹扫塔。

    Monovinylarene/conjugated diene copolymers having lower glass transition temperatures
    40.
    发明授权
    Monovinylarene/conjugated diene copolymers having lower glass transition temperatures 有权
    具有较低玻璃化转变温度的单乙烯基芳烃/共轭二烯共聚物

    公开(公告)号：US07037980B2

    公开(公告)日：2006-05-02

    申请号：US10705704

    申请日：2003-11-10

    申请人： Nathan E. Stacy ,  Larry L. Nash ,  John D. Hottovy

    发明人： Nathan E. Stacy ,  Larry L. Nash ,  John D. Hottovy

    IPC分类号： C08F297/04

    CPC分类号： C08L53/02 ,  C08F297/04 ,  C08F297/046 ,  C08L53/00

    摘要： We disclose a monovinylarene/conjugated diene block copolymer, comprising: (i) a random (conjugated dienex/monovinylareney)m block, wherein x is about 2.5 wt % to about 10 wt %, y is from about 90 wt % to about 97.5 wt %, and x+y is about 97.5 wt % to 100 wt %; and (ii) a (conjugated diene)n block; wherein n is from about 20 wt % to about 30 wt %, m is from about 70 wt % to about 80 wt %, and m+n is from about 90 wt % to 100 wt %. We also disclose a method of forming the block copolymer and a method for fabricating an article from the block copolymer. The block copolymer typically exhibits a Tg at least about 10° C. less than the Tg of a reference polymer differing only in that x is about 0 wt % and y is about 100 wt %.

    摘要翻译： 我们公开了单乙烯基芳烃/共轭二烯嵌段共聚物，其包含：（ⅰ）无规（共轭二烯）/单乙烯基芳烃y）>>> block wherein wherein wherein wherein wherein wherein wherein wherein wherein wherein wherein x为约2.5重量％至约10重量％，y为约90重量％至约97.5重量％，x + y为约97.5重量％至100重量％; 和（ii）（共轭二烯）N 2嵌段; 其中n为约20重量％至约30重量％，m为约70重量％至约80重量％，m + n为约90重量％至100重量％。 我们还公开了形成嵌段共聚物的方法和由嵌段共聚物制造制品的方法。 嵌段共聚物通常表现出比参考聚合物低至少约10℃至少10℃，其不同之处仅在于x为约0重量％，y 为约100重量％。