Collect. Czech. Chem. Commun. 1994, 59, 1971-1982

Diffusion Dialysis of Sulfuric Acid in a Batch Cell

Zdeněk Palatý and Alena Žáková

Department of Chemical Engineering, University of Pardubice, 532 10 Pardubice, Czech Republic


The paper deals with the diffusion dialysis of sulfuric acid into water in a batch cell with a Neosepta-AFN anionselective membrane. The transport of sulfuric acid through the membrane has been quantified with respect to the dissociation of the acid by the dialysis coefficients for HSO4- and SO42- ions. These coefficients have been determined by numerical integration of the basic differential equation describing the time dependence of sulfuric acid concentration in the dialysis cell with subsequent optimization of dialysis coefficients. Moreover, the membrane permeability coefficients for HSO4- and SO42- ions and nondissociated sulfuric acid have been determined by the modified method of the Wilson diagram using the data about mass transfer in liquid for the given geometrical arrangement of cell.