RECOVERY OF FLUORINATED CARBOXYLIC ACID FROM ADSORBENT PARTICLES
    31.
    发明申请
    RECOVERY OF FLUORINATED CARBOXYLIC ACID FROM ADSORBENT PARTICLES 审中-公开
    从吸附颗粒中回收氟化的羧酸

    公开(公告)号:US20070025902A1

    公开(公告)日:2007-02-01

    申请号:US11420413

    申请日:2006-05-25

    IPC分类号: B01D53/70

    摘要: A process for the recovery of fluorinated carboxylic acid or derivative thereof from adsorbent particles on which fluorinated carboxylic acid or a salt thereof is adsorbed. The process includes contacting the adsorbent particles with a liquid composition capable of removing at least part of the fluorinated carboxylic acid or salt thereof from the adsorbent particles. The fluorinated carboxylic acid or salt thereof is selected from the group consisting of fluorinated carboxylic acids or salts thereof that correspond to the general formula: [RfO-L-COO−]iXi+  (I) wherein L represents a linear partially or fully fluorinated alkylene group or an aliphatic hydrocarbon group, Rf represents a linear partially or fully fluorinated aliphatic group or a linear partially or fully fluorinated aliphatic group interrupted with one or more oxygen atoms, Xi− represents a cation having the valence i and i is 1, 2 or 3.

    摘要翻译: 从其上吸附氟化羧酸或其盐的吸附剂颗粒中回收氟化羧酸或其衍生物的方法。 该方法包括使吸附剂颗粒与能够从吸附剂颗粒中除去至少部分氟化羧酸或其盐的液体组合物接触。 氟化羧酸或其盐选自对应于以下通式的氟化羧酸或其盐:<?in-line-formula description =“In-line Formulas”end =“lead”→> (I)&lt;&lt;&lt;&lt; i&lt; i&lt; i&lt; “直链式”末端=“尾”→其中L表示直链部分或完全氟化的亚烷基或脂族烃基,R f表示直链部分或完全氟化的脂肪族基团或 被一个或多个氧原子间断的直链部分或完全氟化的脂肪族基团,X i表示i价和i为1,2或3的阳离子。

    POLYMERIZATION OF HEXAFLUOROPROPYLENE OXIDE
    32.
    发明申请
    POLYMERIZATION OF HEXAFLUOROPROPYLENE OXIDE 审中-公开
    六氟丙烯氧化物的聚合

    公开(公告)号:US20060199942A1

    公开(公告)日:2006-09-07

    申请号:US11276416

    申请日:2006-02-28

    IPC分类号: C08G65/22

    CPC分类号: C08G65/226

    摘要: The present invention provides a process for oligomerization of hexafluoropropylene oxide, the process comprising polymerizing a mixture of hexafluoropropylene oxide and hexafluoropropene in the presence of an aprotic organic solvent using KF as a catalyst.

    摘要翻译: 本发明提供六氟环氧丙烷低聚方法,该方法包括在非质子有机溶剂的存在下使用KF作为催化剂聚合六氟环氧丙烷和六氟丙烯的混合物。

    Removal of fluorinated surfactants from waste water
    34.
    发明授权
    Removal of fluorinated surfactants from waste water 有权
    从废水中除去氟化表面活性剂

    公开(公告)号:US07018541B2

    公开(公告)日:2006-03-28

    申请号:US11034188

    申请日:2005-01-12

    IPC分类号: B01D15/04 C02F1/28

    摘要: The present invention provides a method of removing a fluorinated surfactant from waste water comprising fluoropolymer particles. The method comprises (i) adding a non-fluorinated surfactant to the waste water (ii) contacting the thus obtained waste water with adsorbent particles to adsorb at least a portion of the fluorinated surfactant to the adsorbent particles and (iii) separating the waste water and the adsorbent particles.

    摘要翻译: 本发明提供从含氟聚合物颗粒的废水中除去氟化表面活性剂的方法。 该方法包括:(i)向废水中加入非氟化表面活性剂(ⅱ)使得到的废水与吸附剂颗粒接触,将至少一部分氟化表面活性剂吸附到吸附剂颗粒上,和(iii)将废水 和吸附剂颗粒。

    Removal of fluorinated surfactants from waste water
    35.
    发明申请
    Removal of fluorinated surfactants from waste water 有权
    从废水中除去氟化表面活性剂

    公开(公告)号:US20050173347A1

    公开(公告)日:2005-08-11

    申请号:US11034188

    申请日:2005-01-12

    IPC分类号: C02F1/28 C02F1/58

    摘要: The present invention provides a method of removing a fluorinated surfactant from waste water comprising fluoropolymer particles. The method comprises (i) adding a non-fluorinated surfactant to the waste water (ii) contacting the thus obtained waste water with adsorbent particles to adsorb at least a portion of the fluorinated surfactant to the adsorbent particles and (iii) separating the waste water and the adsorbent particles.

    摘要翻译: 本发明提供从含氟聚合物颗粒的废水中除去氟化表面活性剂的方法。 该方法包括:(i)向废水中加入非氟化表面活性剂(ⅱ)使得到的废水与吸附剂颗粒接触,将至少一部分氟化表面活性剂吸附到吸附剂颗粒上,和(iii)将废水 和吸附剂颗粒。

    Method of making an aqueous dispersion of fluoropolymers
    36.
    发明授权
    Method of making an aqueous dispersion of fluoropolymers 失效
    制备含氟聚合物的水性分散体的方法

    公开(公告)号:US06794550B2

    公开(公告)日:2004-09-21

    申请号:US09914507

    申请日:2001-08-28

    IPC分类号: C08J303

    摘要: The invention provides a process for removing steam-volatile fluorinated emulsifiers in their free acid form, from aqueous fluoropolymer dispersions. The process comprises adding a nonionic emulsifier, to the aqueous fluoropolymer dispersion and, at a pH-value of the aqueous fluoropolymer dispersion below 5, removing steam-volatile fluorinated emulsifier by distillation until the concentration of steam-volatile fluorinated emulsifier in the dispersion reaches the desired value.

    摘要翻译: 本发明提供一种从含氟聚合物水分散体中除去其游离酸形式的挥发性挥发性氟化乳化剂的方法。 该方法包括向含氟聚合物水分散体中加入非离子乳化剂,并且在含氟聚合物水分散体的pH值低于5的情况下,通过蒸馏除去挥发性挥发性氟化乳化剂直到分散体中蒸汽挥发性氟化乳化剂的浓度达到 所需值。

    Method for recovering fluorinated emulsifiers
    37.
    发明授权
    Method for recovering fluorinated emulsifiers 失效
    回收氟化乳化剂的方法

    公开(公告)号:US06642415B1

    公开(公告)日:2003-11-04

    申请号:US10110643

    申请日:2002-04-12

    IPC分类号: C07C5315

    摘要: Fluorinated emulsifiers, in particular, perfluorooctanoic acid are bound to anionic exchange resins for the purification of aqueous effluent from the production of fluoropolymers. Said emulsifiers may be quantitatively eluted from the exchanger with a water-miscible organic solvent, containing a small amount of ammonia. It is of advantage to distil off the ammonia containing solvent, recycle the emulsifier to a further polymerization and recycle the ammoniacal solvent for elution. Addition of alkalis improves the elution efficiency.

    摘要翻译: 氟化乳化剂,特别是全氟辛酸与阴离子交换树脂结合,用于纯化含氟聚合物生产中的含水流出物。 所述乳化剂可以用含有少量氨的水混溶性有机溶剂从交换器中定量洗脱。 蒸馏含氨的溶剂是有利的,将乳化剂再循环进一步聚合,再循环氨溶剂进行洗脱。 碱的添加提高了洗脱效率。