Performance of Mitsui NaA type zeolite membranes for the dehydration of organic solvents in comparison with commercial polymeric pervaporation membranes

Preparation of inner-side tubular zeolite NaA membranes in a continuous flow system

“…This result is consistent with the reduction up to half of the layer thickness for the membranes prepared in a continuous flow system compared to those prepared with the other two aforementioned techniques. In addition, these fluxes are as high as the best values reported in the literature for the PV separation of ethanol/water mixtures using both flat and inner-/outer-side zeolite NaA membranes at the same temperature and feed composition (see Table 4 for comparison) and are comparable with those that can be obtained with commercial zeolite NaA membranes [41,42]. Fig.…”

Neue nanoporöse Molekularsiebmembranen: Zeolithe contra MOFs – Gewinner und Verlierer

“…Erfolgreiche technische Entwicklungen waren der Einsatz von LTA-Membranen bei der Entwässerung von Bio-Ethanol [1 -3] oder i-Propanol [4,5]. Andere Entwicklungen wie die Xylen- [6] oder die Butentrennung [7] an MFI-Membranen führ-ten zu keiner technischen Entwicklung.…”

Pervaporation Dehydration of Azeotropic Water/Acetonitrile Mixture Using High Water Affinity PVA–PVAm Blended Membrane

“…Moreover, it is immiscible with saturated hydrocarbons; hence, it is commonly used as an HPLC mobile phase. 7 To separate the water/acetonitrile mixture, heterogeneous distillation, 8,9 extractive distillation, and solvent extraction 4 have been used. 6 Acetonitrile forms azeotropes with water, the mixture having a boiling point of 76.5 C and containing approximately 82.2 wt % acetonitrile under atmospheric pressure.…”