DEALUMINATION OF ALUMINOSILICATE ZEOLITES

F-4216 DEALUMINATION OF ALUMINOSILICATE ZEOLITES In a method of removing tetrahedral aluminum from an aluminosilicate zeolite, the zeolite is treated with an aqueous fluorosilicate solution which reacts with tetrahedral aluminum in said zeolite to produce water-insoluble aluminum fluoride. In additi...

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Hauptverfasser:	HAN, SCOTT, SHIHABI, DAVID S
Format:	Patent
Sprache:	eng ; fre
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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Zusammenfassung:	F-4216 DEALUMINATION OF ALUMINOSILICATE ZEOLITES In a method of removing tetrahedral aluminum from an aluminosilicate zeolite, the zeolite is treated with an aqueous fluorosilicate solution which reacts with tetrahedral aluminum in said zeolite to produce water-insoluble aluminum fluoride. In addition, during or after aluminum removal, the zeolite is contacted with an aqueous solution containg a water-soluble fluoride capable of reacting with the insoluble aluminum fluoride to produce a water-soluble species.