Studies on bipolar membranes - Part III: Conversion of sodium phosphate tophosphoric acid and sodium hydroxide

The electrodialytic water dissociation process employing bipolar membranes has been used successfully for obtaining acids and alkalies from salts. Ear lier reports by us described the preparation of bipolar membranes and their applications in converting sodium sulphate into sulphuric acid and sodium hydroxide; sodium acetate into acetic acid and sodium hydroxide [G.S. Trive di et al., React. Funct. Polym. 28 (1996) 243; Ibid: 32 (1997) 209]. In thi s paper as an extension of our earlier published works the experimental res ults on the conversion of sodium phosphate to phosphoric acid and sodium hy droxide under different experimental conditions are described. (C) 1999 Els evier Science B.V. All rights reserved.