BigPatents India

The present invention relates a process for the preparation of zeolitic catalysts comprising microspheres of zeolite and oligomeric silica, which consists essentially of : a) synthesizing the zeolite under hydrothermal conditions, at autogenous pressure, and in the presence of tetra-alkyl- ammonium hydroxide as templating agent to obtain a suspension containing zeolite crystals and tetra-alkyl-ammonium; b) rapid drying said suspension resulting from step (a); and c) calcining of the product resulting from step (b).