Study of the influence of extra-framework cations and organic templates on zeolite crystallization in SiO2–Al2O3–Na2O–K2О (R2O, RO) systems

Abstract

Crystallization of zeolites from the gels of the (3–x)К₂О–xR₂O(RO)–0.05Na₂O–Al₂O₃–5SiO₂–100H₂O composition where x was varied from 0 to 3 and R = Li, Na, Rb, Cs, Ba, tetraethylammonium, tetrapropylammonium, and tetrabutylammonium, has been performed by hydrothermal synthesis. The influence of various cationic ratios on the final product of crystallization depending on the synthesis temperature has been studied at constant SiO₂: A₂lO₃ and H₂O: SiО₂ ratios. The correlation between the cationic composition of the initial gels, their structure, and the structure of the crystallizing zeolites has been estimated.