Ion exchangeis a field in which cooperation betweenchemists and chemical engineersis highlydesirable. This NATO AdvancedStudy Institute had as aprimary objectiveto bring together chemists and chemical engineers. The Institute was dedicatedto the memory of Prof. Ted Vermeulen who was supposed to be our scientificadvisor. The lectures presentedat the Institute are collected in this volume together with papers presentedby F.Evangel ista,A.Bungeand G.Grevillot. The materialis arrangedin five sections. The Introduction con- tains a review of the contributions of Vermeulen'swork to the field and an overviewof ion exchange. Section2 deals with the chemistry of ion exchangeresins.Section3 covers the chemical engineeringas- pects of ion exchangeprocesses (thermodynamics ,kinetics ,modelling and modes of operation).Section 4 starts with a broad review of in- dustrial applicationsof ion exchangefollowed by papers dealing with hydrometallurgy,react ion processes involvingion exchangers and zeolites.Finally section5 deals with Alternative Processes to ion exchange.Itincludesion exchangemembranes,solvent extraction, liquidmembranes andcementation. I am very grateful to my coworkerJ .Loureirofor the collabora- tion as Institute Secretary.
Cooperationof M.Hudson at severalsta- ges of the organization of the Institute is gratefully acknowledged. The financialsupport of the NATO AdvancedStudy Institute Pro- gramme made this course possible.The participants made it allworth- while. October1,1985 A.E.Rodrigues VII NATO Advanced Stud y Institute "Ion Exchange : Science and Technology" Director:A.E.Rodrigues Advisory Committee: M.Hudson (co-director),M.Streatand D.Tondeur Lecturers: S.Carra,Politecnico Milano,Italy C.Costa,Universidade do Porto,Portugal P .Grammont,Duolite International,France F.Helfferich,Penn.State University,USA M.Hudson,University of Reading,UK .