Optimization of a Two-Compartment Bipolar Membrane Electrodialysis System for the Production of Sodium Hydroxide and Sulphuric Acid from..., 1996 Minimum Effluent Mills Symposium Proceedings

M. Paleologou, A. Thibault, P.-Y. Wong

R. Thompson, R.M. Berry -

Pulp and Paper Research Institute of Canada

Sodium sulphate, a by-product of chlorine dioxide generators and likely of most TCF bleaching sequences, was split into sodium hydroxide and sulphuric acid by using a two-compartment bipolar membrane electrodialysis (BME) system. The system was optimized by using the buffering effect of di-valent sulphate anions to improve current efficiency. In the optimized experiment, sodium hydroxide (1.08 M at 46 mL/min) and sodium sesquisulphate (0.74 M at 68 mL/min) were produced at a current efficiency of 78% for the produc-tion of both acid and base.

Optimization of a Two-Compartment Bipolar Membrane Electrodi
Optimization of a Two-Compartment Bipolar Membrane Electrodialysis System for the Production of Sodium Hydroxide and Sulphuric Acid from..., 1996 Minimum Effluent Mills Symposium Proceedings
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