PREPARATION OF BUTANEDIOIC ANHYDRIDE BY ONE-STEP CATALYTIC HYDROGENATION OF CIS-ANHYDRIDE

In this invention, after cis-anhydride being melted, it is catalytic-hydrogenated directly into butanedioic anhydride. The procedures include: melting of cis-anhydride, catalytic hydrogenation, pulverization and bagging Cis-anhydride is melted at a temperature of 60-80 degC. The hydrogen pressure of...

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Bibliographic Details
Main Author TANG XINING
Format Patent
LanguageEnglish
Published 12.08.1992
Subjects
ACYCLIC OR CARBOCYCLIC COMPOUNDS
CHEMISTRY
METALLURGY
ORGANIC CHEMISTRY
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Summary:In this invention, after cis-anhydride being melted, it is catalytic-hydrogenated directly into butanedioic anhydride. The procedures include: melting of cis-anhydride, catalytic hydrogenation, pulverization and bagging Cis-anhydride is melted at a temperature of 60-80 degC. The hydrogen pressure of catalytic hydrogenation is about 15 Kg per square centimeter. The reaction temperature is 70-126 deg.C. Rene with four components is used as catalyst and its amount is 1-3 percent.
Bibliography:Application Number: CN1992100554