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Extraction of propionic acid from fermentation broth by chemical complexation

FENG Xiaohai1,CHEN Fei1,YAO Zhong1,ZHANG Yan2,XU Hong1   

  1. 1 State Key Laboratory of Materials-Oriented Chemical Engineering,College of Food Science and Light Industry,
    Nanjing University of Technology ;2 Ningbo Drug Testing Institute
  • Online:2010-05-05 Published:2010-05-05

络合萃取法分离发酵液中丙酸

冯小海1,陈 飞1,姚 忠1,章 燕2,徐 虹1   

  1. 1南京工业大学食品与轻工学院材料化学工程国家重点实验室;2宁波市药品检验所

Abstract: Extraction of propionic acid by chemical complexation was investigated from simulation solution and fermentation broth. Methyl trioctyl-ammonium chloride(MTAC)diluted with octanol was used for the extraction,which had a higher selectivity for propionic acid over other organic acids and was less affected by pH and inorganic anions. The extraction equilibrium could be reached in 15 min when 1.2 mol/L of MTAC was applied with an extraction phase ratio of 3∶1(organic phase to water phase). This system was believed to be adaptable for the extraction of propionic acid with high concentration. Over four-stage extraction,86.2% of propionic acid could be extracted.

摘要: 利用络合萃取法对模拟溶液和发酵液中的丙酸分离进行研究。络合剂、稀释剂筛选结果表明:选用甲基三辛基氯化胺(MTAC)为络合剂、正辛醇为稀释剂时,萃取受pH值和无机阴离子影响较小,对丙酸具有较高的选择性。以1.2 mol/L的MTAC为萃取有机相,有机相/水相(体积比)为3的条件下,萃取15 min即能达到平衡;该系统适用于较高浓度丙酸发酵液萃取,经4级萃取丙酸萃取率达86.2%。

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