Abstract
Pervaporation (PV) is a membrane process used to separate liquid mixtures. In the dehydration application, water is removed from its mixtures with organic components by selective permeation through a dense hydrophilic membrane. The most relevant application of PV is the separation of liquid azeotropes and close boiling point solvent-water mixtures. In the present article, the research work developed in the field of hydrophilic pervaporation by the Advanced Separation Processes group of the University of Cantabria (Spain) will be reviewed. Special attention will be devoted to the applications related to the recovery by dehydration of organic solvents employed in different industrial processes. A brief description of the theoretical background and design basis of hydrophilic pervaporation will be followed by the presentation of a series of case studies: (i) Valorization of an industrial ketonic waste; (ii) recovery of tetrahydrofuran; (iii) isopropanol recovery from a pharmaceutical waste stream; and (iv) drying of cyclohexane in the chemical manufacturing of synthetic rubbers.
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