Process for preparing bound zeolites
US7018595B2 · kind B2 · utility
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3Claims
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Key dates
| Filing date | Dec 10, 2002 |
| Grant date | Mar 28, 2006 |
| Priority date | — |
| Expiry date | Dec 30, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S423/29
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
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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