OXIDATION OF URONIC ACIDS TO ALDARIC ACIDS WITH A GOLD CATALYST UNDER ACIDIC CONDITIONS

Disclosed is the oxidation of uronic acids, such as galacturonic acid, to the corresponding aldaric acids, such as galactaric acid, under neutral or acidic conditions. Use is made of a supported gold catalyst. The oxidation occurs in good selectivity and yield, under unexpectedly mild conditions. A...

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Bibliographische Detailangaben
Hauptverfasser:	FRISSEN, AUGUSTINUS EMMANUEL, VAN ES, DANIEL STEPHAN, VAN DER KLIS, FRITS, PAZHAVELIKKAKATH PURUSHOTHAMAN, RAJEESH KUMAR, VAN HAVEREN, JACOBUS
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	ACYCLIC OR CARBOCYCLIC COMPOUNDS CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMISTRY DERIVATIVES THEREOF METALLURGY NUCLEIC ACIDS NUCLEOSIDES NUCLEOTIDES ORGANIC CHEMISTRY PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL SUGARS THEIR RELEVANT APPARATUS TRANSPORTING
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Beschreibung
Zusammenfassung:	Disclosed is the oxidation of uronic acids, such as galacturonic acid, to the corresponding aldaric acids, such as galactaric acid, under neutral or acidic conditions. Use is made of a supported gold catalyst. The oxidation occurs in good selectivity and yield, under unexpectedly mild conditions. A source of galacturonic acids is pectins, such as from sugar beet pulp. La présente invention concerne l'oxydation d'acides uroniques, comme l'acide galacturonique, en acides aldariques correspondants, comme l'acide galactarique, dans des conditions neutres ou acides. Un catalyseur à l'or supporté est utilisé. L'oxydation se produit avec une bonne sélectivité et un bon rendement, dans des conditions étonnamment modérées. Les pectines, issues par exemple de la pulpe de betterave, sont des source d'acides galacturoniques.