Process for preparing bound zeolites
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United States of America Patent
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Mar 28, 2006
Grant Date -
May 1, 2003
app pub date -
Dec 10, 2002
filing date -
Oct 3, 1997
priority date (Note) -
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Abstract
A process is described for the preparation of zeolitic catalysts in the form of microspheres, comprising zeolite and oligomeric silica, characterized by a high mechanical resistance. The process consists in subjecting to rapid drying the suspension, to which tetra-alkylorthosilicate is optionally added, resulting from the synthesis of zeolite by hydrothermal treatment at autogenous pressure of the reagent mixture containing tetra-alkylammoniumhydroxide as templating agent, and subjecting the product resulting from the drying to calcination.
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