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发明公开
CN108084063A 全氟乙烯基醚磺酸盐的制备方法 无效 - 驳回

全氟乙烯基醚磺酸盐的制备方法
摘要：
本发明属于全氟树脂技术领域，具体的涉及一种全氟乙烯基醚磺酸盐的制备方法。所制备的全氟乙烯基醚磺酸盐的结构式为CF2＝CFOCF2CF2SO2OM，M＝Li、Na、K或Cs；首先是以CF3CF(COF)OCF2CF2SO2F为原料，低温成盐后水解脱羧得到其含氢化合物CF3CFHOCF2CF2SO2F；其次是将含氢化合物CF3CFHOCF2CF2SO2F与烷氧基碱金属盐进行碱解反应得到CF3CFHOCF2CF2SO2F相应的磺酸盐，然后在强碱条件下脱氟化氢即得CF2＝CFOCF2CF2SO2OM。本制备方法通过将原料CF3CF(COF)OCF2CF2SO2F直接转换成含氢化合物，避免了环砜开环后的其他副产物，只形成一种主产品，同时收率很高，达到95％以上，纯度达到99％以上；本制备方法过程简单，容易操作，试剂成本低廉，同时能够有效消除含氢化合物的存在，提高了烯醚单体的纯度。
摘要（英）：

The invention belongs to the technical field of perfluorinated resin and particularly relates to a preparation method of perfluorovinyl ether sulfonate. The perfluorovinyl ether sulfonate prepared herein has a structural formula of CF2=CFOCF2CF2SO2OM, with M=Li, Na, K or Cs. The preparation method comprises: subjecting CF3CF(COF)OCF2CF2SO2F as a raw material to low temperature salifying, and performing hydrolytic decarboxylation to obtain a hydrogen-bearing compound CF3CFHOCF2CF2SO2F; subjecting the hydrogen-bearing compound CF3CFHOCF2CF2SO2F and an alkoxy alkali metal salt to alkaline hydrolysis to obtain a corresponding sulfonate of CF3CFHOCF2CF2SO2F; performing dehydrofluorination under strong base conditions to obtain CF2=CFOCF2CF2SO2OM. The preparation method has the advantages that the raw material CF3CF(COF)OCF2CF2SO2F is directly converted into the hydrogen-bearing compound, other byproducts from cyclosulfone ring opening are avoided, only one main product is formed, the yieldis high, up to higher than 95%, and the purity reaches higher than 99%; the preparation method has a simple process and is easy to perform, the reagent cost is low, the hydrogen-bearing compound can be effectively eliminated, and the purity of alkene ether monomer is improved.

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