According to the present invention there is provided a process for producing an acid anhydride by reacting a carboxylic acid, preferably a carboxylic acid having a polymerizable group, with a sulfonyl halide compound in the presence of a tertiary amine or in the presence of a tertiary amine and an inorganic base, wherein the tertiary amine or the tertiary amine and the inorganic base are used in an amount of 0.9 to 1.2 equivalents relative to the acid generated from the sulfonyl halide compound.
根据本发明,提供了一种生产酸酐的工艺,其方法是在叔胺存在下或在叔胺和
无机碱存在下,使
羧酸(最好是具有可聚合基团的
羧酸)与磺
酰卤化合物反应,其中叔胺或叔胺和
无机碱的用量相对于磺
酰卤化合物生成的酸为 0.9 至 1.2 个当量。