Patent ID: 6913696
Filing Date: 2005-07-05
Classification: B01D

Abstract:
1. A pervaporation process for partial or essentially complete separation of the components of a feed mixture comprised of organic liquids using a homogeneous polymeric membrane having an upstream side and a downstream side, which process comprises the steps of: contacting said feed mixture with the upstream side of the membrane whereby a component of the mixture having a relatively higher polarity or said mixture enriched in this component is selectively sorbed into said upstream side of the membrane and selectively diffuses to the downstream side of the membrane; desorbing said component having a relatively higher polarity or said mixture enriched in this component from said downstream side of the membrane; and recovering a component of the mixture having a relatively lower polarity or said mixture enriched in this component from said upstream side of the membrane; wherein said membrane comprises a polymerized alkene including pendant groups of formula SO provided that at least two said components of said feed mixture have polarities which differ from each other.