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    MANUFACTURING METHOD FOR HYDROFLUOROOLEFIN OR FLUOROOLEFIN
    1.
    发明申请
    MANUFACTURING METHOD FOR HYDROFLUOROOLEFIN OR FLUOROOLEFIN 有权

    公开(公告)号：US20230014347A1

    公开(公告)日：2023-01-19

    申请号：US17895529

    申请日：2022-08-25

    申请人： DAIKIN INDUSTRIES, LTD. ,  OSAKA UNIVERSITY

    发明人： Yuuta HASUMOTO ,  Tatsuya TAKAKUWA ,  Osamu YAMAMOTO ,  Hideki NAKAYA ,  Masao NOUMI ,  Kazuyuki SATOU ,  Kohei YAMANOI ,  Akihiro OSHIMA

    IPC分类号： C07C17/278

    摘要： This disclosure provides a method for producing a hydrofluoroolefin (HFO) or fluoroolefin (FO), which is a target compound, with high selectivity, without requiring a high temperature and a catalyst in a synthesis process of the target compound. Specifically, the present disclosure provides a method for producing a hydrofluoroolefin or fluoroolefin having two, three, or four carbon atoms, comprising irradiating at least one starting material compound selected from the group consisting of hydrofluorocarbons having one or two carbon atoms and hydrofluoroolefin As having two or three carbon atoms with ionizing radiation and/or an ultraviolet ray having a wavelength of 300 nm or less, with the proviso that when the at least one starting material compound is the hydrofluoroolefin A, the resulting hydrofluoroolefin is different from the hydrofluoroolefin A.

    METHOD FOR PRODUCING LOW-MOLECULAR-WEIGHT POLYTETRAFLUOROETHYLENE
    3.
    发明申请
    METHOD FOR PRODUCING LOW-MOLECULAR-WEIGHT POLYTETRAFLUOROETHYLENE 有权

    公开(公告)号：US20210347953A1

    公开(公告)日：2021-11-11

    申请号：US17259859

    申请日：2019-07-12

    申请人： OSAKA UNIVERSITY ,  DAIKIN INDUSTRIES, LTD.

    发明人： Akihiro OSHIMA ,  Takayuki TANAKA ,  Hideki NAKAYA ,  Kazuyuki SATOH ,  Ryosuke SENBA

    IPC分类号： C08J3/28 ,  C08F8/50 ,  C08F114/26

    摘要： Provided is a method for producing low-molecular-weight polytetrafluoroethylene which is less likely to generate C6-C14 perfluorocarboxylic acids and salts thereof. The disclosure relates to a method for producing low-molecular-weight polytetrafluoroethylene having a melt viscosity at 380° C. of 1.0×102 to 7.0×105 Pa·s. The method includes (1) irradiating high-molecular-weight polytetrafluoroethylene with radiation in a substantially oxygen-free state and decomposing the high-molecular-weight polytetrafluoroethylene into a low-molecular-weight component and (2) deactivating, in a substantially oxygen-free state, at least part of main-chain radicals and end radicals generated by the irradiation and providing the low-molecular-weight polytetrafluoroethylene.