MODIFIED MCM-56, ITS PREPARATION AND USE

A layered composition of matter, MCM-56, has an X-ray diffraction including the lines listed in Table (II) and has been selectively modified so that the ratio of the num-ber of active acid sites at its external surface to the number of internal active acid sites is greater than that of the un-modifi...

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Hauptverfasser:	CHESTER, ARTHUR WARREN, FUNG, SHIU LUN ANTHONY, ROTH, WIESLAW JERZY, KRESGE, CHARLES THEODORE
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	ACYCLIC OR CARBOCYCLIC COMPOUNDS CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMISTRY COMPOUNDS THEREOF CRACKING HYDROCARBON OILS FUELS INORGANIC CHEMISTRY LUBRICANTS METALLURGY MINERAL WAXES NON-METALLIC ELEMENTS ORGANIC CHEMISTRY PEAT PERFORMING OPERATIONS PETROLEUM, GAS OR COKE INDUSTRIES PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVEHYDROGENATION, OLIGOMERISATION, POLYMERISATION RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, ORGASES REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS REFORMING OF NAPHTHA TECHNICAL GASES CONTAINING CARBON MONOXIDE THEIR RELEVANT APPARATUS TRANSPORTING
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Beschreibung
Zusammenfassung:	A layered composition of matter, MCM-56, has an X-ray diffraction including the lines listed in Table (II) and has been selectively modified so that the ratio of the num-ber of active acid sites at its external surface to the number of internal active acid sites is greater than that of the un-modified material. When used as an additive to a large pore zeolite catalyst in the catalytic cracking of a petroleum feedstock, the modified MCM-56 gives an improved gaso-line yield/octane relationship, an improved coke selectivity and a higher combined gasoline and potential alkylate yield than an identical catalyst containing unmodified MCM-56.