Regularities and peculiarities of the synthesis of molecular sieves with pentasil structure
โ Scribed by T. V. Limova
- Publisher
- Springer US
- Year
- 1992
- Tongue
- English
- Weight
- 311 KB
- Volume
- 28
- Category
- Article
- ISSN
- 0009-3092
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๐ SIMILAR VOLUMES
Chromium has been substituted successfully in a silicalite structure for the first time in acidic medium. A combined application of cyclic voltammetry (Et/2 = + 588 mV vs. standard calomel electrode) and electron spin resonance reveals that both Cr ~รท and Cr 5รท are present as part of the structure w
Tin-containing, medium pore molecular sieves (Si/Sn ratios above 40) with MEL structure have been synthesized hydrothermally and characterized by a variety of techniques. Changes in unit cell volume (XRD) account for about 20% of Sn 4 + ions in possible tetrahedral positions, l l9Sn MAS-NMR spectra,