The possibility of transforming a diatomite-rich waste from the brewing industry into synthetic zeolites has been investigated. After precalcination at 550 °C to eliminate retained organic matter, clean diatomite (Dt; with Si/Al molar ratio 17.4), was hydrothermally treated for 24 h continuous stirring in 3M NaOH solution 80 °C. results mineralogical characterization by X-ray diffraction Rietve...

Abstract Flörkeite, a rare zeolite with PHI (phillipsite) framework type, was found in numerous amygdaloidal voids pyrometamorphic rocks of the Hatrurim Basin, Complex, Israel. This is second reported occurrence flörkeite previously Ca-rich xenolith from quarry at Bellerberg volcano near Ettringen, East Eifel volcanic area, Germany. The mineral empirical crystal chemical formula (K2.91Ca2.00Na0...

Micro/mesoporous zeolitic composites (MZCs) represent an important class of hierarchical zeolitic materials that have attracted increasing attention in recent years. By introducing an additional mesoporous phase interconnected with the microporosity of zeolites, a hierarchical porous system of MZCs is formed which facilitates molecular transport while preserving the intrinsic catalytic properti...