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    Core/shell fluoropolymer dispersions with low fluorosurfactant content
    4.
    发明授权
    Core/shell fluoropolymer dispersions with low fluorosurfactant content 失效
    具有低含氟表面活性剂含量的核/壳含氟聚合物分散体

    公开(公告)号：US07612139B2

    公开(公告)日：2009-11-03

    申请号：US11435006

    申请日：2006-05-15

    申请人： Clay Woodward Jones ,  David William Johnson

    发明人： Clay Woodward Jones ,  David William Johnson

    IPC分类号： C08L27/12

    CPC分类号： C08L51/003 ,  C08F259/08 ,  C08J3/05 ,  C08J5/18 ,  C08J2327/18 ,  C09D151/003 ,  C08L2666/02

    摘要： A stabilized aqueous fluoropolymer dispersion comprising: about 30 to about 70 weight % non-melt-processible fluoropolymer particles having an SSG of less than about 2.225, said fluoropolymer particles comprising a core of high molecular weight polytetrafluoroethylene and a shell of lower molecular weight polytetrafluoroethylene or modified polytetrafluoroethylene; and about 2 to about 11 weight % of aliphatic alcohol ethoxylate nonionic surfactant based on the weight of said fluoropolymer, wherein said dispersion is essentially free of surfactants containing aromatic groups and contains less than 300 ppm of fluorosurfactant based on the weight of said dispersion.

    摘要翻译： 一种稳定的含水氟聚合物分散体，其包含：约30至约70重量％的SSG小于约2.225的不可熔融加工的含氟聚合物颗粒，所述含氟聚合物颗粒包含高分子量聚四氟乙烯核和低分子量聚四氟乙烯壳，或 改性聚四氟乙烯; 和基于所述含氟聚合物重量的约2至约11重量％的脂族醇乙氧基化物非离子表面活性剂，其中所述分散体基本上不含含芳族基团的表面活性剂，并且基于所述分散体的重量含有少于300ppm的含氟表面活性剂。

    Monitoring column breakthrough in a process for removing fluorosurfactant from aqueous fluoropolymer dispersions
    5.
    发明授权
    Monitoring column breakthrough in a process for removing fluorosurfactant from aqueous fluoropolymer dispersions 失效
    在从含氟聚合物水分散体中除去含氟表面活性剂的过程中监测柱的突破

    公开(公告)号：US07671111B2

    公开(公告)日：2010-03-02

    申请号：US11351125

    申请日：2006-02-09

    申请人： Charles Joseph Noelke ,  Steven H. Swearingen ,  David William Johnson

    发明人： Charles Joseph Noelke ,  Steven H. Swearingen ,  David William Johnson

    IPC分类号： C08L1/00

    CPC分类号： C08F6/16 ,  B01J41/05 ,  B01J41/07 ,  C02F2001/422 ,  C02F2101/36 ,  C08J3/03 ,  C08J2327/12 ,  C08L27/12

    摘要： A process for reducing the fluorosurfactant content of a stabilized fluorosurfactant-containing aqueous fluoropolymer dispersion by passing dispersion through a first fixed bed of anion exchange resin to reduce fluorosurfactant content. The first fixed bed has a working zone which moves though the column as the ion exchange resin is saturated. The process includes monitoring a property of the dispersion as the dispersion exits the fixed bed to determine break though of the working zone indicating saturation of the fixed bed. The property being monitored is selected from the group consisting of pH and conductivity.

    摘要翻译： 通过使分散体通过阴离子交换树脂的第一固定床来降低含氟表面活性剂的含水氟聚合物分散体的含氟表面活性剂含量以降低含氟表面活性剂含量的方法。 第一固定床具有当离子交换树脂饱和时通过柱移动的工作区。 该方法包括当分散体离开固定床时监测分散体的性质，以确定指示固定床饱和的工作区的断裂。 被监测的性质选自pH和电导率。

    Process for the production of (meth)acrylic acid and derivatives and polyers produced therefrom
    7.
    发明授权
    Process for the production of (meth)acrylic acid and derivatives and polyers produced therefrom 有权
    制备（甲基）丙烯酸及其衍生物和聚合物的方法

    公开(公告)号：US09216938B2

    公开(公告)日：2015-12-22

    申请号：US13984473

    申请日：2012-02-08

    申请人： David William Johnson ,  Graham Ronald Eastham ,  Martyn Poliakoff ,  Thomas Andrew Huddle

    发明人： David William Johnson ,  Graham Ronald Eastham ,  Martyn Poliakoff ,  Thomas Andrew Huddle

    IPC分类号： C07C67/08 ,  C07C51/48 ,  C07C51/38 ,  C08F20/06 ,  C08F20/02

    CPC分类号： C07C51/48 ,  C07C51/38 ,  C08F20/02 ,  C08F20/06 ,  C07C57/04

    摘要： A method of extracting (meth)acrylic acid from an aqueous reaction medium into an organic phase in contact therewith is described. The aqueous reaction medium is formed from at least one base catalyst and at least one dicarboxylic acid selected from maleic, fumaric, malic, itaconic, citraconic, mesaconic, and citramalic acid or mixtures thereof in aqueous solution and contains the base catalysed decarboxylation products of the base catalysed reaction. The method includes either the addition of at least one of the said dicarboxylic acids and/or a pre-cursor thereof to the aqueous reaction medium to enhance the solvent extraction of the (meth)acrylic acid into the organic solvent or maintaining the level of base catalyst to dicarboxylic acid and/or pre-cursor at a sub-stoichiometric level during the extraction process. The method extends to a process of producing (meth)acrylic acid, its esters and polymers and copolymers thereof.

    摘要翻译： 描述了从水性反应介质中提取（甲基）丙烯酸到与其接触的有机相中的方法。 水性反应介质由水性溶液中的至少一种碱催化剂和至少一种选自马来酸，富马酸，苹果酸，衣康酸，柠康酸，中康酸和柠檬酸的二羧酸或其混合物形成，并含有碱催化的脱羧产物 碱催化反应。 该方法包括将至少一种所述二羧酸和/或其前体加入到水性反应介质中以增强（甲基）丙烯酸溶剂萃取到有机溶剂中或维持碱的水平 催化剂到二羧酸和/或在提取过程中在亚化学计量水平的前体。 该方法延伸至生产（甲基）丙烯酸的方法，其酯及其聚合物和共聚物。

    Priming valve system for pre-priming centrifugal pump intakes
    8.
    发明授权
    Priming valve system for pre-priming centrifugal pump intakes 有权
    用于预灌注离心泵入口的启动阀系统

    公开(公告)号：US09175686B2

    公开(公告)日：2015-11-03

    申请号：US13599646

    申请日：2012-08-30

    申请人： David William Johnson

    发明人： David William Johnson

    IPC分类号： F04D9/04 ,  F04D9/00

    CPC分类号： F04D9/006 ,  Y10T137/86035

    摘要： A priming valve for priming a centrifugal pump includes a valve assembly separating an inlet chamber from an outlet chamber. The inlet chamber is fluidly coupled to an intake for the centrifugal pump and the outlet chamber is fluidly coupled to a priming pump. A control valve is provided to operate the valve assembly in order to fluidly connect the inlet chamber with the outlet chamber. While the valve assembly fluidly connects the inlet chamber with the outlet chamber, the priming pump can operate to replace air in the intake and the centrifugal pump with water.

    摘要翻译： 用于起动离心泵的起动阀包括将入口室与出口室分离的阀组件。 入口室流体地联接到用于离心泵的进气口，并且出口室流体地联接到起动泵。 提供控制阀以操作阀组件以将入口室与出口室流体连接。 当阀组件将入口室与出口室流体连接时，起动泵可以操作以用水来替代进气口和离心泵中的空气。

    Thermal Reduction of Fluoroether Carboxylic Acids or Salts from Fluoropolymer Dispersions
    10.
    发明申请
    Thermal Reduction of Fluoroether Carboxylic Acids or Salts from Fluoropolymer Dispersions 失效
    含氟聚合物分散体中氟醚羧酸或盐的热还原

    公开(公告)号：US20100286330A1

    公开(公告)日：2010-11-11

    申请号：US12774030

    申请日：2010-05-05

    申请人： David William Johnson ,  Kenneth Scott Teter

    发明人： David William Johnson ,  Kenneth Scott Teter

    IPC分类号： C08L27/12

    CPC分类号： C08F6/16 ,  C08F14/18 ,  C08L27/12 ,  C08F2/20 ,  C08F2/16

    摘要： A process for reducing the fluoroether carboxylic acid or salt content of aqueous fluoropolymer dispersion. The fluoroether carboxylic acid or salt employed comprises fluoroether carboxylic acid or salt having the formula below: [R1—O-L-COO−]Y+ wherein R1 is a linear, branched or cyclic partially or fully fluorinated aliphatic group which may contain ether linkages; L is a branched partially or fully fluorinated alkylene group which may contain ether linkages; and Y+ is hydrogen, ammonium or alkali metal cation. The process comprises adding stabilizer to the aqueous fluoropolymer dispersion to form a stabilized aqueous fluoropolymer dispersion and heating the stabilized aqueous fluoropolymer dispersion to decarboxylate the fluoroether carboxylic acid or salt to produce a fluoroether byproduct. At least a portion of the fluoroether byproduct is removed.

    摘要翻译： 降低氟代醚羧酸含量或含氟聚合物含水分散体的盐含量的方法。 所用的氟醚羧酸或其盐包括具有下式的氟醚羧酸或盐：[R 1 -O-L-COO-] Y +，其中R 1是可以含有醚键的直链，支链或环状的部分或完全氟化的脂族基团; L是可以含有醚键的支化部分或完全氟化的亚烷基; Y +是氢，铵或碱金属阳离子。 该方法包括向含氟聚合物含水分散体中加入稳定剂以形成稳定的含氟聚合物含水分散体，并加热稳定的含氟聚合物水分散体以使氟代醚羧酸或盐脱羧以产生氟醚副产物。 除去至少一部分氟醚副产物。