SELECTIVE SURFACE DEALUMINATION OF ZEOLITES AND USE OF THE SURFACE-DEALUMINATED ZEOLITES

A process for the selective surface dealumination of a zeolite having a Constraint Index greater than 1 comprising contacting the zeolite with dicarboxylic acid, such as oxalic acid. The resultant surface-dealuminated zeolite exhibits improved selectivity for the conversion of cyclohexanone oxime to...

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Bibliographische Detailangaben
Hauptverfasser:	APELIAN, MINAS R, BELL, WELDON K, VENKAT, CHAYA R, HAAG, WERNER O, FUNG, SHIU L.A
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMISTRY COMPOUNDS THEREOF HETEROCYCLIC COMPOUNDS INORGANIC CHEMISTRY METALLURGY NON-METALLIC ELEMENTS ORGANIC CHEMISTRY PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL THEIR RELEVANT APPARATUS TRANSPORTING
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Beschreibung
Zusammenfassung:	A process for the selective surface dealumination of a zeolite having a Constraint Index greater than 1 comprising contacting the zeolite with dicarboxylic acid, such as oxalic acid. The resultant surface-dealuminated zeolite exhibits improved selectivity for the conversion of cyclohexanone oxime to epsilon caprolactam.