ausblenden:
Schlagwörter:
B-MFI;
Dry synthesis;
MTN;
Seed crystals
Zusammenfassung:
B-MFI and MTN-type materials were synthesized via the fluoride route from dry powders in the complete absence of a solution phase. Amorphous precursors obtained by drying SiO2 · Al2O3 gels at 700°C were transformed into MTN-type material in the presence of dried NH4F and TMACl. Amorphous precursors obtained by drying SiO2 gels at 700°C were transformed into B-MFI in the presence of dried NH4F, B2O3 and TPABr. Water is formed as a reaction product. However, the water vapor pressure is appreciably below the water vapor saturation pressure under the given reaction conditions. In addition, syntheses using seed crystals were carried out successfully.
