Modification of zeolites with ammonium fluoride

Details Modification of zeolites with ammonium fluoride Modification of zeolites with ammonium fluoride

B - Operations, Transporting

01

J

196/100, 252/2.C

B01J 29/38 (1985.01)

Patent

CA 1236816

MODIFICATION OF ZEOLITES WITH AMMONIUM FLUORIDE ABSTRACT A method for enhancing the shape selectivity and adjusting catalytic activity of a crystalline zeolite, including a highly siliceous zeolite, is disclosed. Such a method involves contacting the zeolite with an ammonium fluoride solution in the absence of an aluminum source, optionally contacting the treated zeolite with a warm aqueous solution of an ammonium salt and then calcining the fluoride and ammonium treated zeolite to produce a more shape selective zeolite material. Such treated zeolites are useful in catalysts which promote shape selective conversion of organic compounds including, for example, hydrocarbon cracking reactions.

474416

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