TWO STAGE SYNTHESIS OF ZEOLITE

摘要

Zeolites are synthesised from an aqueous reaction mixture containing sources of silica, alumina, alkali metal and nitrogenous organic directing agent in two stages, a lower-temperature nucleation stage and a higher temperature crystallisation stage. The directing agent may be supplemented by an alcohol or diol. Catalysts comprising zeolites so synthesised are of particular value in alkylation of benzene and dealkylation of ethylbenzene.