Electrochemical process for production of tetraalkyl 1,2,3,4-butanetetracarboxylates
AssigneeEvonik Oxeno GmbH
InventorsMichael Grass, Johannes Kraft, Michael van Eickels, Sebastian Arndt, Carl-Friedrich Hoppe, Stephan Becker, David Sascha Bremer
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Abstract
An electrochemical process produces tetraalkyl 1,2,3,4-butanetetracarboxylates having alkyl groups with 1 to 6 carbon atoms. The process employs an electrohydrodimerization of dialkyl maleates having alkyl groups having 1 to 6 carbon atoms in a reactant solution with an alcohol and a conducting salt.
Claims14
A process for producing tetraalkyl 1,2,3,4-butanetetracarboxylates containing alkyl groups having 1 to 6 carbon atoms by electrohydrodimerization in at least one reaction zone comprising an anode and a cathode with a reactant solution comprising dialkyl maleates containing alkyl groups having 1 to 6 carbon atoms, at least one monohydric alcohol having 1 to 6 carbon atoms, and a conducting salt, the process comprising:
- electrohydrodimerizing the dialkyl maleates to afford tetraalkyl 1,2,3,4-butanetetracarboxylates at the cathode,
- wherein the anode and the cathode employed are boron-doped diamond electrodes.
Dependencies are inferred from the claim text.