ISSN print edition: 0366-6352
ISSN electronic edition: 1336-9075
Registr. No.: MK SR 9/7
Continuous dialysis of sulphuric acid in the presence of zinc sulphate
Zdeněk Palatý and Helena Bendová
Institute of Environmental and Chemical Engineering, Faculty of Chemical Technology, University of Pardubice, Studentská 573, 532 10 Pardubice, Czech Republic
Abstract: Transport of sulphuric acid in the presence of zinc sulphate through the anion-exchange membrane Neosepta-AFN (Astom Corporation,
Japan) was studied in a two-compartment counter-current dialyzer with single passes at steady state. The following characteristics
were used to characterize the dialysis process: recovery yield of acid, rejection coefficient of salt, and permeability coefficient
of the membrane. In case of the H2SO4 + ZnSO4 mixture, permeability of the membrane was quantified by four phenomenological coefficients which are functions of acid and
salt concentrations in the feed. They were determined by numerical integration of differential equations describing the concentration
profiles of both components in both compartments, which was combined with an optimizing procedure.
Keywords: dialysis – anion-exchange membrane – sulphuric acid – zinc sulphate – continuous dialyzer
Full paper is available at www.springerlink.com.
Chemical Papers 65 (2) 233–241 (2011)