Pervaporation Dehydration of Alcohol with Polyelectrolyte Membrane

Abstract

Abstract: Polyelectrolytes have a high hydrophilicity and can be used in pervaporation(PV) dehydration of alcohol. Chitosan(CS) used as polycation polysaccharide and carboxymethyl cellulose(CMC) used as polyanion polysaccharide were chosen as PVmembrane materials. CSmembrane cross-linked with oxalic acid or citric acid and CS-CMCpolyelectrolyte membrane were prepared. The results showed that the polyelectrolyte membranes had an excellent PVperformance for alcohol dehydration. For example, when the separation factor gone up to 2300, the total flux of CS-CMCpolyelectrolyte membrane was above 800 g/(m²·h) in₉₅% EtOHand at 72 ℃. The nature and content of cross-linking agents affected the separation properties of cross-linked CSmembrane. The total flux of the cross-linked CSmembrane increased with operating temperature increasing and corresponded to the Arrhenius equation.

Key words: Polyelectrolyte, Pervaporation, Membrane, Alcohol dehydration

CLC Number:

O645

TrendMD:

ZHOU Zhi-Jun, CHEN Huan-Lin, LIU Mo-E, ZHANG Ying . Pervaporation Dehydration of Alcohol with Polyelectrolyte Membrane[J]. Chem. J. Chinese Universities, 2001, 22(7): 1213.

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Pervaporation Dehydration of Alcohol with Polyelectrolyte Membrane

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