Abstract
Ion-exchange membranes are mainly used today in electrodialysis for desalination of sea and brackish water. The membranes have been optimized for this application in terms of their ion selectivity and their mechanical, chemical and electrical properties. They are, however, unsatisfactory for the separation of organic components such as amino acids because of their poor permeability for larger anions which is required in certain applications in the food and pharmaceutical industry. In this paper the development of an anion-exchange membrane with high permeability for large organic anions and satisfactory mechanical, chemical and electrical properties is described. The membrane is prepared by changing the degree of cross-linking of the basic ion-exchange polymer.
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