Lipari pumice has selectively been transformed into zeolites in NaOH/NaCl media. The influence of NaCl and retention times on the degree of zeolitization is discussed for different NaOH concentrations. In the absence of NaCl, the high SiO2/Al2O3 ratio zeolites ZK-19 and phillipsite appear after long induction periods, whereas the SiO2/Al2O3-rich hydroxysodalite and faujasite are formed exclusively for [NaOH] = 120 g l−1 in the presence of NaCl.
Hydrothermal synthesis of zeolites from pumice in alkaline and saline environment
OTTANA', Rosaria;
1982-01-01
Abstract
Lipari pumice has selectively been transformed into zeolites in NaOH/NaCl media. The influence of NaCl and retention times on the degree of zeolitization is discussed for different NaOH concentrations. In the absence of NaCl, the high SiO2/Al2O3 ratio zeolites ZK-19 and phillipsite appear after long induction periods, whereas the SiO2/Al2O3-rich hydroxysodalite and faujasite are formed exclusively for [NaOH] = 120 g l−1 in the presence of NaCl.File in questo prodotto:
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