PRODUCTION OF TRANS-2-BUTENE-1,4-DICARBOXYLIC ACID OR ITS ESTERS

PURPOSE:To highly selectively obtain trans 2 butene-1,4-dicarboxylic acid or its esters in high yield by electrolytically reducing musconic acid or its esters in a lower alcohol contg. an acidic compd. CONSTITUTION:Musconic acid or its esters are electrolytically reduced in a lower alcohol contg. an...

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Bibliographic Details
Main Authors HIRASHIMA TSUNESUKE, NISHIGUCHI IKUZO, ISHINO YOSHIO
Format Patent
LanguageEnglish
Published 16.12.1991
Subjects
APPARATUS THEREFOR
CHEMISTRY
ELECTROLYTIC OR ELECTROPHORETIC PROCESSES
ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTIONOF COMPOUNDS OR NON-METALS
METALLURGY
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Summary:PURPOSE:To highly selectively obtain trans 2 butene-1,4-dicarboxylic acid or its esters in high yield by electrolytically reducing musconic acid or its esters in a lower alcohol contg. an acidic compd. CONSTITUTION:Musconic acid or its esters are electrolytically reduced in a lower alcohol contg. an acidic compd. consisting preferably of a strong protonic acid such as sulfuric acid and perchloric acid. In this case, the concn. of musconic acid or its esters is preferably controlled to 5-15wt.% based on the total liq. reactant and that of the acidic compd. to 10-20wt.%. Methanol is most preferably used as the lower alcohol. The electrolytic reduction is carried out by using an electrolytic cell which is divided into an anode chamber and a cathode chamber by a diaphragm. By this reduction, trans-2-butene-1,4- dicarboxylic acid or its esters having >=98% purity is obtained in high yield (e.g. 95%).
Bibliography:Application Number: JP19900084704