METHOD OF MANUFACTURE OF MOLECULAR SIEVES

ZEOLITES EXCHANGED WITH LITHIUM IONS AND, OPTIONALLY, WITH POLYVALENT CATIONS ARE PREPARED BY ION-EXCHANGING A SODIUM-COATAINING ZEOLITE, A POTASSIUM-CONTAINING ZEOLITE OR A SODIUM-AND POTASSIUM-CONTAINING ZEOLITE WITH AMMONIUM IONS, THEREBY REPLACING THE SODIUM AND/OR POTASSIUM IONS WITH AMMONIUM I...

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Bibliographische Detailangaben
Hauptverfasser:	ADEOLA F. OJO, MARTIN BULOW, FRANK R. FITCH
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMISTRY COMPOUNDS THEREOF INORGANIC CHEMISTRY METALLURGY NON-METALLIC ELEMENTS PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL THEIR RELEVANT APPARATUS TRANSPORTING
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Beschreibung
Zusammenfassung:	ZEOLITES EXCHANGED WITH LITHIUM IONS AND, OPTIONALLY, WITH POLYVALENT CATIONS ARE PREPARED BY ION-EXCHANGING A SODIUM-COATAINING ZEOLITE, A POTASSIUM-CONTAINING ZEOLITE OR A SODIUM-AND POTASSIUM-CONTAINING ZEOLITE WITH AMMONIUM IONS, THEREBY REPLACING THE SODIUM AND/OR POTASSIUM IONS WITH AMMONIUM IONS, AND THEN REACTING THE AMMONIUM ION-EXCHANGED ZEOLITE WITH A WATER-SOLUBLE LITHIUM COMPOUND UNDER CONDITIONS WHICH RESULT IN THE REMOVAL OF AMMONIA FROM THE REACTION ZONE. POLYVALENT IONS, WHICH MAY BE PRESENT IN THE ZEOLITE UNDERGOING ION-EXCHANGE, WILL NOT BE SUBSTANTIALLY REPLACED BY THE AMMONIUM OR LITHIUM IONS.