Process for the preparation of nanocrystalline zeolite beta
AssigneeCouncil of Scientific and Industrial Research
InventorsKottapalli Koteswara Rao, Bhavnari Puma Chandra Rao, Boyapati Manoranjan Choudary, Lakshmi Kantam Mannepalli, Vijaya Raghavan Kondapuram
Life of this patent
Estimating the term…
Abstract
The present invention relates to the preparation of nanocrystalline zeolite beta by a modified aerogel protocol comprising four steps, namely, hydrolysis, nucleation, crystallization and supercritcal drying.
Claims18
A process for preparing nanocrystalline zeolite beta comprising hydrolysing a synthetic mixture comprising of a silica source and an aluminium source in the presence of a templating agent, and in absence of alkali metal cations, nucleating the resulting product under stirring at room temperature followed by crystallization at higher temperatures and pressures and finally drying the resulting product at supercritical conditions to obtaine nanocrystalline zeolite beta.
Use of a nanocrystalline zeolite beta obtained by hydrolysing a silica source and an aluminium source in the presence of a templating agent and in absence of alkali metal cations, nucleating the resulting product under stirring at room temperature followed by crystallization at higher temperatures and pressures and finally drying the resulting product at supercritical conditions, to prepare nanocrystalline zeolite beta for production of 4-nitro o-xylene with high selectivity.
Dependencies are inferred from the claim text.