The recovery of acetic acid with sulfur dioxide

This paper studies the reaction between SO2 and calcium acetate, which potentially can be used to recover acetic acid from the anaerobic fermentation broth with a SO2 waste stream. The conversion of given amounts of calcium acetate to acetic acid was evaluated under different reaction temperatures and flow rates of SO2. Analyses of concentrations of the produced acetic acid indicated that the reactions between SO2 and calcium acetate were complete under all experimental conditions.