PROCESS FOR THE PREPARATION OF CRYSTALLINE SILICATES, CRYSTALLINE SILICATES SO PREPARED AND PROCESS FOR CARRYING OUT CATALYTIC REACTIONS

摘要

ABSTRACTProcess for the preparation of ZSM-5 type crystalline aluminumsilicates. An aqueous mixture containing a compound of an alkalimetal (m), a quarternary alkyl ammonium compound (R4Mx), a siliconcompound that after drying at 120°C and calcination at 500°C yieldsa product with an SiC2 content of more than 90% by weight, and analuminum compound in which mixture the various compounds arepresent in the specific molar ratios, is maintained at elevatedtemperature until the crystalline silicate is formed which isseparated, dried and calcined.