MANUFACTURE OF ZEOLITE CATALYST FROM PH_CONTROLLED AND SODIUM_FREE BASE

摘要

Zeolites, e.g. ZSM-5, are prepared under controlled conditions of pH adjustment with an acid, SiO2/Al2O3 mole ratio, and in the substantial absence of alkali metal cations, such zeolites are useful for synthesizing olefins from methanol and/or dimethyl ether.