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Bipolar membranes for purification of acids and bases

Authors
Journal
Journal of Membrane Science
0376-7388
Publisher
Elsevier
Publication Date
Volume
61
Identifiers
DOI: 10.1016/0376-7388(91)80018-2
Keywords
  • Bipolar Membranes
  • Acid/Base Purification
  • Electrodialysis

Abstract

Abstract Bipolar membranes have conventionally been used for the production of acids and bases from their salts. A new class of applications has been identified and developed recently, based on the recognition that these membranes can act as highly selective cation or anion membranes in a conventional electrodialysis type operation. This high degree of selectivity can be used to purify various acid/base streams that arise from industrial operations such as ion exchange, battery production and minerals processing. The AQUATECH acid/base purification process achieves product purities and concentrations that are not achievable via conventional electrodialysis, diffusion dialysis or ion retardation techniques. Details of the process are presented and discussed.

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