ALUMINOSILICATE CATALYST FOR PREPARATION PROPYLENE VIA METHANOL

摘要

A process for the preparation of P-HZSM-5 for methanol conversion to light olefins especially propylene, with utilizing a tetraalkylphosphonium salt, is disclosed. The catalyst based on crystalline aluminosilicates of the pentasil type, having an SiO2/A12O3 molar ratio at least 280, the BET surface area from 300 to 400 m2/g, total pore volume at least 0.15 and at most 0.4 cm3/g, the average pore diameter at least 2 and at most 20 nm and mean crystallites size at least 1 and at most 11 µm.