Extraction of Lactic Acid Using Long Chain Amines Dissolved in Non-Polar Diluents
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概要
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The present paper deals with the effect of di- and tri-n-octylamine (DOA and TOA) dissolved in non-polar diluents or the mixture of non-polar diluents and modifier on the extraction of L-lactic acid from aqueous solutions. The amount of the lactic acid extracted to the organic phase at equilibrium is dependent on the initial concentration of lactic acid in the aqueous phase as well as on that of amine in the organic phase. The results confirmed that almost all the portion of lactic acid can be effectively extracted when the DOA concentration exceeds the initial concentration of lactic acid in aqueous phase, and that TOA have little ability for the extraction when it is dissolved in non-polar diluent. Adding the modifier (decanol) to non-polar diluent is also demonstrated to be effective for improving the extraction ability of TOA. The influence of equilibrium pH value on the distribution ratio of lactic acid can be reasonably characterized by modifying the conventional ion-pair extraction model.
著者
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Mori Hidetoshi
Department Of Chemical Engineering Nagoya University
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Kawasaki Hiroyuki
Department Of Chemical And Biochemical Engineering Toyama University
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Kojima Kazuo
Department Of Applied Chemistry College Of Life Sciences Ritsumeikan University
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Yamamoto Tatsumi
Department Of Chemical And Biochemical Engineering Toyama University
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SAYAMA Michio
Department of Life Sciences and Bioengineering, Faculty of Engineering, University of Toyama
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Kawasaki Hiroyuki
Department of Life Sciences and Bioengineering, Faculty of Engineering, University of Toyama
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