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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Bibliographic Details
Main Authors APELIAN, MINAS R, BELL, WELDON K, VENKAT, CHAYA R, HAAG, WERNER O, FUNG, SHIU L.A
Format Patent
LanguageEnglish
French
Published 12.11.1993
Edition5
Subjects
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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Summary: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. F-6615(6976) 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 epsilon caprolactam.
Bibliography:Application Number: CA19932094947