Untersuchungen zum Bildungsmechanismus von Molsieben

Investigations on the Mechanism of Molecular Sieve Formation By means of chemical methods it is shown that the formation of zeolithic molecular sieves proceeds via the following stages: Precipitation of strongly SiO₂ containing amorphous products, having varying compositions and containing high-condensed silicate anions; dissolution of these primary products under formation of low-molecular silicate anions; precipitation of a further intermediary product, having, however, a constant composition and containing low-molecular anions (mono- and disilicate); finally, transformation of this intermediate, partially under a further alteration of the silicate anion type, into the crystalline molecular sieve.