Pervaporation Separation of Benzene/Cyclohexane Mixtures by Poly(vinyl chloride) Membranes

Abstract

Sorption and pervaporation of benzene/cyclohexane mixtures were studied by using poly(vinyl chloride) (PVC) polymer. The effects of composition of benzene/cyclohexane mixture and temperature on sorption and pervaporation characteristics were determined at 30, 40, and 50 °C for the membranes containing 8 wt% PVC polymer. Liquid feed composition effects on the flux and the selectivity were determined for two different membranes at 30 °C. The membranes that were prepared from the solutions containing 4 wt% and 8 wt% PVC polymer have thicknesses of 30 μm and 50 μm, respectively. Membrane thickness changes with polymer content as expected. Total sorption increased with increasing concentration of benzene. Increasing the concentration of benzene resulted in increasing flux as well as decreasing selectivity also. Fluxes were increased and selectivity decreased with increasing temperature. The selectivity was not affected significantly with varying amounts of polymer in the casting solution but the flux decreased with increasing amount of polymer in the casting solution.

Pervaporative recovery of acetone from water using mixed matrix blend membranes

“…Yeang et al [14] reported a total sorption of around 0.65 g by 1 g of a blend membrane of PVA and CS filled with carbon nano tube. Yildirim et al [23] studied virgin PVC membrane for the sorption of benzene-cyclohexane mixtures. 1 g of the PVC membrane showed a total sorption of around 0.2 g of the benzene-cyclohexane mixture containing 20 wt.% benzene.…”

Chitosan/ZIF‐8 Mixed‐Matrix Membranes for Pervaporation Dehydration of Isopropanol

“…Membrane separation technology is an energy‐conservative separation process . Pervaporation (PV) is a type of membrane separation process with many applications, such as solvent dehydration and organic mixtures separation . It also has several advantages, such as easier operation and lower energy consumption, compared with conventional methods.…”

Poly(vinyl alcohol)/chitosan blend membranes for pervaporation of benzene/cyclohexane mixtures

“…Benzene, which has π‐electron clouds, shows a stronger interaction with the polar or hydrophilic polymeric materials than cyclohexane. Therefore, various polar and hydrophilic membrane materials, such as polyacrylonitrile,6 polyurethanes,7 acetyl cellulose,2 poly(vinyl chloride),8 and poly(vinyl alcohol)9 were employed to separate Bz/Chx mixtures. Among them, PVA has been used as a preferred material because of its high hydrophilicity, good chemical stability, facile membrane‐forming property, and low cost.…”