Stable, catalytically active and coke selective zeolite

A stable rare earth exchanged zeolite having high catalytic activity and improved coke selectivity is prepared by a series of exchange steps whereby the rare earth is introduced into the zeolite in a multi-step e.g., two step manner. The method comprises exchanging a sodium zeolite to less than 4.0...

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Bibliographische Detailangaben
Hauptverfasser:	MCDANIEL, CARL VANCE, MAGEE, JR., JOHN STOREY
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMISTRY CRACKING HYDROCARBON OILS FUELS LUBRICANTS METALLURGY MINERAL WAXES 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 stable rare earth exchanged zeolite having high catalytic activity and improved coke selectivity is prepared by a series of exchange steps whereby the rare earth is introduced into the zeolite in a multi-step e.g., two step manner. The method comprises exchanging a sodium zeolite to less than 4.0 weight percent Na2O, exchanging with rare earth to give an initial rare earth oxide content of 0.3 to 5 weight percent, calcining, and further rare earth exchanging the zeolite to give a final rare earth content of 1.0 to 10 weight percent.