HYDROGENATION OF PHTHALIC ACIDS

The present invention relates to an improved process for the hydrogenation of phthalic acids over a supported palladium catalyst. Phthalic acids are hydrogenated with improved selectivity in aqueous solution over palladium on carbon catalyst to give cyclohexanedicarboxylic acids (CHDA). La présente...

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Bibliographische Detailangaben
Hauptverfasser:	GUSTAFSON, BRUCE, L, SUMNER, CHARLES, E., JR
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	ACYCLIC OR CARBOCYCLIC COMPOUNDS APPARATUS THEREFOR CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMISTRY GENERAL METHODS OF ORGANIC CHEMISTRY METALLURGY ORGANIC CHEMISTRY PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL THEIR RELEVANT APPARATUS TRANSPORTING
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Beschreibung
Zusammenfassung:	The present invention relates to an improved process for the hydrogenation of phthalic acids over a supported palladium catalyst. Phthalic acids are hydrogenated with improved selectivity in aqueous solution over palladium on carbon catalyst to give cyclohexanedicarboxylic acids (CHDA). La présente invention concerne un procédé amélioré permettant l'hydrogénation d'acides phtaliques sur un catalyseur au palladium sur support. Les acides phtaliques sont hydrogénés avec une sélectivité améliorée en solution aqueuse sur catalyseur au palladium sur carbone pour donner des acides cyclohexanedicarboxyliques (CHDA).