Chemistry of inorganic compounds – Zeolite – Isomorphic metal substitution
Patent
1993-12-27
1995-06-20
Bell, Mark L.
Chemistry of inorganic compounds
Zeolite
Isomorphic metal substitution
423DIG21, 423715, 502 85, C01B 3334, B01J 2908
Patent
active
054259347
ABSTRACT:
Disclosed is a method for treating synthetic zeolite to remove organic template material therefrom and concurrently therewith effect dealumination of the zeolite. The method comprises the steps of providing a body of synthetic zeolite containing organic template material, the zeolite having an SiO.sub.2 /Al.sub.2 O.sub.3 ratio of at least 7:1. The body is treated with a solution comprised of an alcohol selected from methanol, ethanol and propanol and an acid selected from hydrochloric, nitric and sulfuric acid at a temperature and time to remove the organic template material therefrom and to effect dealumination thereof to provide a treated zeolite product. The treated product is washed to remove residual solution and then dried to provide a synthetic zeolite product containing a reduced amount of organic template material and having an SiO.sub.2 /Al.sub.2 O.sub.3 ratio of at least 7:1.
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Komarneni Sridhar
Malla Prakash B.
Alexander Andrew
Bell Mark L.
Gas Research Institute
Sample David
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