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    PROCESS FOR REMOVAL OF FLUOROORGANIC COMPOUNDS FROM EMULSIONS
    43.
    发明公开
    PROCESS FOR REMOVAL OF FLUOROORGANIC COMPOUNDS FROM EMULSIONS 审中-公开

    公开(公告)号：EP3945075A1

    公开(公告)日：2022-02-02

    申请号：EP20188787.4

    申请日：2020-07-30

    申请人： 3M Innovative Properties Company

    发明人： Hintzer, Dr. Klaus ,  Koenigsmann, Dr. Herbert ,  Huber, Dr. Stefan ,  Krupp, Valentina ,  Schmick, Scott ,  Zhang, Zhongxing

    IPC分类号： C02F1/52 ,  C02F1/66 ,  C08F6/16

    摘要： The present disclosure provides a process for removing fluoroorganic acidic compounds from an emulsion of fluoroorganic polymer particles, the process comprising the following steps:
    (i) forming a mixture of
    a. an emulsion comprising fluoroorganic polymer particles, at least one fluoroorganic acidic compound and at least one protic solvent, with
    b. at least one alkylamine;

    (ii) reacting the fluoroorganic acidic compound with the alkylamine to form a hydrophobic ionic compound comprising the anion of the fluoroorganic acidic compound and the cation of the alkyl amine;
    (iii) separating the mixture into a first phase comprising the at least one protic solvent and no greater than 50% by weight of the total amount of the at least one fluoroorganic compound initially present in the solution in step (i); and a second phase comprising the hydrophobic ionic compound;
    (iva) removing the first phase from the second phase; and then
    (va) removing the fluoroorganic polymer particles from the second phase and/or the first phase, or
    (ivb) removing the fluoroorganic polymer particles from the second phase and/or the first phase, and then
    (vb) removing the first phase from the second phase.

    FLUORINE-CONTAINING COMPOUND PURIFICATION METHOD
    47.
    发明授权
    FLUORINE-CONTAINING COMPOUND PURIFICATION METHOD 有权

    公开(公告)号：EP2298726B1

    公开(公告)日：2018-08-01

    申请号：EP09770126.2

    申请日：2009-06-22

    申请人： Asahi Glass Company, Limited

    发明人： TAKAGI, Hirokazu ,  SEKI, Ryuji

    IPC分类号： C07C51/44 ,  C07C59/135 ,  C07C67/54 ,  C07C69/708 ,  C08F2/26 ,  C08F14/00 ,  C08F14/18 ,  C08F6/16 ,  C08F6/22

    CPC分类号： C08F6/16 ,  C07C51/44 ,  C07C67/54 ,  C08F2/26 ,  C08F6/22 ,  C08F14/18 ,  C07C59/135 ,  C07C69/708 ,  C08L27/18 ,  C08F2/22

    摘要： To provide a method for purifying a fluorinated carboxylic acid having an etheric oxygen atom and its derivative, with small decomposition and inclusion of impurities. A liquid containing at least one member selected from the group consisting of a fluorinated compound represented by the following formula (1) and a fluorinated compound represented by the following formula (2) is held at a heating temperature of at most 150°C and distilled: €ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒR F OR 1 COOH€ƒ€ƒ€ƒ€ƒ€ƒ(1) €ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒR F OR 1 COOR 2 €ƒ€ƒ€ƒ€ƒ€ƒ(2) R F is a linear or branched monovalent fluoroorganic group which may have an etheric oxygen atom in its main chain, R 1 is a linear or branched bivalent organic group, and R 2 is a linear or branched monovalent organic group. Further, the liquid is a liquid obtained from any of a waste liquid after an aqueous emulsion of a fluoropolymer is coagulated and the fluoropolymer is separated, an aqueous liquid obtained by cleaning an exhaust gas in a step of drying and/or a step of heat treatment of the separated fluoropolymer, and a liquid obtained by cleaning an anion exchange resin which has been brought into contact with the waste liquid or an aqueous dispersion obtained from the aqueous emulsion of the fluoropolymer, with an alkaline aqueous solution.