Process for producing perfluorocarboxylic acid fluoride
    1.
    发明授权
    Process for producing perfluorocarboxylic acid fluoride 失效
    制备全氟羧酸氟化物的方法

    公开(公告)号:US5399754A

    公开(公告)日:1995-03-21

    申请号:US233802

    申请日:1994-04-26

    CPC分类号: C07C51/58

    摘要: A process of producing a perfluorocarboxylic acid fluoride having the formula (1): ##STR1## wherein n is an integer of at least 2, comprising effecting oligomerization of hexafluoropropylene oxide in the presence of an alkali metal fluoride a sulfone or a mixture of a sulfone with an ether having the formula (2):CH.sub.3 O(CH.sub.2 CH.sub.2 O).sub.m CH.sub.3 (2)where m is an integer of 2 to 6. This process makes it possible to improve production yield of hexafluoropropylene oxide oligomers remarkably, and to raise a reaction temperature for the oligomerization, as compared with conventional methods, thereby shortening reaction time therefor.

    摘要翻译: 一种制备具有式(1)的全氟羧酸氟化物的方法:其中n是至少为2的整数,包括在碱金属氟化物a砜或混合物存在下进行六氟环氧丙烷的低聚反应 具有式(2)的醚的砜:CH 3 O(CH 2 CH 2 O)m CH 3(2)其中m是2至6的整数。该方法可以显着提高六氟环氧丙烷低聚物的产率,并提高 与常规方法相比,用于低聚的反应温度,从而缩短了其反应时间。