Regenerating sodium hydroxide from the spent caustic by bipolar membrane electrodialysis (BMED)

Abstract An experimental study was carried out on regeneration sodium hydroxide (NaOH) from the spent caustic by bipolar membrane electrodialysis (BMED). The effects of operation parameters, such as concentration of electrolyte, current density and initial base concentration, on regeneration were investigated. The results indicate that low energy consumption and high current efficiency can be achieved with the concentration of electrolyte in the range of 0.20–0.30 mol/L, initial concentration of the base in range of 0.10–0.25 mol/L and current density in the range of 30–60 mA/cm 2 . The process cost is estimated to be USD 0.97 for regenerating 1 kg NaOH with the laboratory-scale equipment, showing economically competitive.

[1]  Chuanhui Huang,et al.  Electrodialysis‐based separation technologies: A critical review , 2008 .

[2]  Chuanhui Huang,et al.  Electrodialysis with bipolar membranes for sustainable development. , 2006, Environmental science & technology.

[3]  L. Bazinet,et al.  Effect of bipolar membrane electrobasification on chitosanase activity during chitosan hydrolysis. , 2008, Journal of biotechnology.

[4]  Tongwen Xu,et al.  Production of Tetramethyl Ammonium Hydroxide Using Bipolar Membrane Electrodialysis , 2008 .

[5]  Akihiko Tanioka,et al.  Alcohol splitting in a bipolar membrane and analysis of the product , 2001 .

[6]  Fang Zhang,et al.  Production of Sebacic Acid Using Two-Phase Bipolar Membrane Electrodialysis , 2009 .

[7]  L. Bazinet,et al.  Delipidation of a whey protein concentrate by electroacidification with bipolar membranes. , 2007, Journal of agricultural and food chemistry.

[8]  Cong-jie Gao,et al.  The energy-saving production of tartaric acid using ion exchange resin-filling bipolar membrane electrodialysis , 2009 .

[9]  M. Dornier,et al.  Deacidification of passion fruit juice by electrodialysis with bipolar membrane after different pretreatments , 2009 .

[10]  J. Winnick,et al.  Electrochemical removal and concentration of hydrogen sulfide from coal gas , 1984 .

[11]  T. V. D. Boomgaard,et al.  Current-voltage curve of a bipolar membrane at high current density , 1996 .

[12]  Guiqing Zhang,et al.  Production of high-purity water by continuous electrodeionization with bipolar membranes: Influence of concentrate and protection compartment , 2008 .

[13]  Matthias Wessling,et al.  Chronopotentiometry for the advanced current–voltage characterisation of bipolar membranes , 2001 .

[14]  Tongwen Xu,et al.  Regenerating flue-gas desulfurizing agents by bipolar membrane electrodialysis , 2006 .

[15]  K. Sriroth,et al.  Application of bipolar electrodialysis on recovery of free lactic acid after simultaneous saccharification and fermentation of cassava starch , 2008, Biotechnology Letters.

[16]  C. E. Ellis.  Wet air oxidation of refinery spent caustic , 1998 .

[17]  A. Pauss,et al.  Electrodialysis with bipolar membrane for regeneration of a spent activated carbon. , 2009, Journal of hazardous materials.

[18]  Laurent Bazinet,et al.  Electrodialytic Phenomena and Their Applications in the Dairy Industry: A Review , 2005, Critical reviews in food science and nutrition.

[19]  L. Bazinet,et al.  Performing a three-step process for conversion of chitosan to its oligomers using a unique bipolar membrane electrodialysis system. , 2008, Journal of agricultural and food chemistry.

[20]  H. Strathmann,et al.  Process economics of the electrodialytic water dissociation for the production of acid and base , 2000 .

[21]  Tongwen Xu,et al.  Win−Win Coupling in Electrodialysis with Bipolar Membranes (EDBM) for Cleaner Production , 2009 .

[22]  Harm Schmoldt,et al.  Handbook on Bipolar Membrane Technology , 2002 .

[23]  Tongwen Xu,et al.  Regenerating fuel-gas desulfurizing agents by using bipolar membrane electrodialysis (BMED): effect of molecular structure of alkanolamines on the regeneration performance. , 2007, Environmental science & technology.

[24]  Yang Weihua,et al.  Citric acid production by electrodialysis with bipolar membranes , 2002 .