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    • 8. 发明授权
    • Preparation method for perfluoroalkane sulfinate
    • 全氟烷基亚磺酸盐的制备方法
    • US09073828B2
    • 2015-07-07
    • US13574138
    • 2011-03-03
    • Takashi KashiwabaTsutomu NanmyoYoichi Takenaka
    • Takashi KashiwabaTsutomu NanmyoYoichi Takenaka
    • C07C313/04
    • C07C313/04
    • In a method for obtaining an alkali metal perfluoroalkanesulfinate by reacting a perfluoroalkanesulfonyl halide with a sulfur-containing reducing agent in the presence of water, a reaction liquid containing the alkali metal sulfinate obtained after the reaction is concentrated till a specific concentration, thereby inorganic salts, which are impurities in the solution, are precipitated and removed, and a filtrate after removing the inorganic salts is subjected to an operation such as concentration and drying, thereby obtaining the target alkali metal perfluorosulfinate with a high purity and a good operability. Furthermore, an organic solvent for extraction becomes unnecessary. Therefore, it is possible to greatly reduce wastes.
    • 在通过使全氟烷基磺酰卤与含硫还原剂在水的存在下反应来获得全氟烷基亚磺酸碱金属的方法中,将反应后得到的含有碱金属亚磺酸盐的反应液浓缩至特定浓度, 将溶液中的杂质析出除去,除去无机盐后的滤液进行浓缩干燥等操作,得到纯度高,操作性好的目标碱金属全氟亚磺酸酯。 此外,不需要用于萃取的有机溶剂。 因此,可以大大减少废物。