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    • 21. 发明授权
    • Method for preparing trifluoromethanesulphinic acid
    • 三氟甲磺酸的制备方法
    • US08633334B2
    • 2014-01-21
    • US12744875
    • 2008-11-25
    • Vincent SchanenOlivier BuisineFrançois MetzBernard Besson
    • Vincent SchanenOlivier BuisineFrançois MetzBernard Besson
    • C07C313/04
    • C07C313/04
    • The present invention relates to a method for preparing a highly pure trifluoromethanesulphinic acid. The method of the invention for preparing a highly pure trifluoromethanesulphinic acid, starting from an aqueous mixture comprising a trifluoromethanesulphinic acid salt, a trifluoroacetic acid salt and saline impurities resulting from the method for preparing same, is characterized in that said mixture is subjected to the following operations: —acidification such that the trifluoroacetic acid salt and the triflinic acid salt are released in an acid form, —separation of the trifluoroacetic acid and trifluoromethanesulphinic acid by distillation enabling the trifluoroacetic acid to be recovered at the top of the distillation and the trifluoromethanesulphinic acid to be recovered at the bottom of the distillation, —separation by distillation of the trifluoromethanesulphinic acid present in the distillation residue previously obtained.
    • 本发明涉及一种制备高纯度三氟甲磺酸的方法。 本发明制备高纯度三氟甲磺酸的方法,其特征在于,由包含三氟甲磺酸盐,三氟乙酸盐和由其制备方法得到的盐水杂质的含水混合物开始,将所述混合物进行以下步骤 操作:酸化使得三氟乙酸盐和三氟甲磺酸盐以酸的形式释放,通过蒸馏分离三氟乙酸和三氟甲磺酸,使得三氟乙酸在蒸馏顶部回收,并且三氟甲亚磺酸 在蒸馏的底部回收,通过蒸馏先前获得的蒸馏残余物中存在的三氟甲亚磺酸分离。