A method for isomerizing a maleate, or a maleate containing a 2-propenyloxy group in the molecule at a high selectivity is provided which employs an isomerizing catalyst containing a Group VIII element. This method produces a fumarate, or a fumarate containing a 1-propenyloxy group in a high yield, which is useful in the fields of resin source materials and plasticizer. This method gives high-purity fumarates containing no catalyst residue by use of a heterogeneous catalyst which is readily separable and non-corrosive.
本发明提供了一种将
马来酸盐或分子中含有 2-
丙烯酰氧基的
马来酸盐进行高选择性异构化的方法,该方法采用了含有第八族元素的异构化催化剂。这种方法能高产
富马酸盐或含有
1-丙烯氧基的
富马酸盐,在
树脂原料和
增塑剂领域非常有用。该方法通过使用一种易于分离且无腐蚀性的异相催化剂,制得不含催化剂残留物的高纯度
富马酸盐。