Method for producing fumaric acid esters
OwnerYasushi Kadowaki, Keisuke Ohta +1inventors
InventorsYasushi Kadowaki, Keisuke Ohta, Kazufumi Kai
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Abstract
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.
Claims22
A method for producing a fumarate by isomerizing a maleate, comprising using an isomerization catalyst containing a Group VIII element.
A method for producing a fumarate containing a 1-propenyloxy group, comprising isomerizing a maleate containing a 2-propenyloxy group in the molecule thereof to the fumarate containing the 1-propenyloxy group by use of an isomerization catalyst containing a Group VIII element.
Dependencies are inferred from the claim text.