An immobilized-interface solute-transfer unit for transferring solute from a feed solution to an extractant liquid comprises a fluid-tight housing and a porous membrane which divides the housing into a feed solution chamber and an extractant chamber. The housing has feed solution inlet and outlet ports...http://www.google.es/patents/US4789468?utm_source=gb-gplus-sharePatente US4789468 - Immobilized-interface solute-transfer apparatus
