Silicates with the crystal structure of type ZSM zeolite were obtained by hydrothermal synthesis in the presence of Al(III), Fe(III), and Cu(II) salts.
The selectivity of the aluminosilicates for the aromatic products of the transformation of methanol decreased with an increase in the concentration of Fe(III) and Cu(II); synthesis of aromatic hydrocarbons was not observed on ferrosilicates.
It was hypothesized that the introduction of Fe3+ and Cu3+ ions decreases the value of n in the active site of Si(OAl)n(SiO)4−n aluminosilicate, which results in a decrease in the rate of hydrogen redistribution in the unsaturated intermediate compounds formed in the transformation of methanol.
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Vostrikova, L.A., Echevskii, G.V., Nosyreva, G.N. et al. Catalytic properties of Fe3+ and Cu2+ silicates with the structure of zeolites. Russ Chem Bull 34, 890–894 (1985). https://doi.org/10.1007/BF01142769
- Crystal Structure