In general, product purification is carried out by variousmethods, such as distillation, crystallization, chromatographicseparation, and membrane separation. An ideal purificationtechnique should have a single-step purification procedure, withno or minimal use of solvent and minimal use of energy that isstable over a wide range of physicochemical parameters. Suchan ideal of purification technology is closely associated withmembrane-based separation processes because they can beperformed continuously, under mild conditions, and in amajority of cases without phase separation, the only exceptionbeing pervaporation.1−4 Present applications of membranebasedprocesses of separation and/or purification include thefollowing: