Recovery of Lactic Acid Using Reactive Dividing Wall Column

분리벽형 반응증류탑을 이용한 젖산회수

  • Woo, Daesik (Dept. of Chemical Engineering, Chungnam National University) ;
  • Cho, Youngmin (Korea Institute of Energy Research) ;
  • Kim, Bo-kyung (Dept. of Chemical Engineering, Chungnam National University) ;
  • Hwang, Hwidong (Dept. of Chemical Engineering, Chungnam National University) ;
  • Han, Myungwan (Dept. of Chemical Engineering, Chungnam National University)
  • 우대식 (충남대학교 화학공학과) ;
  • 조영민 (한국에너지기술연구원) ;
  • 김보경 (충남대학교 화학공학과) ;
  • 황휘동 (충남대학교 화학공학과) ;
  • 한명완 (충남대학교 화학공학과)
  • Received : 2010.01.21
  • Accepted : 2010.03.23
  • Published : 2010.06.30

Abstract

Lactic acid is widely used in the food, chemical and pharmaceutical industries, and there is an increasing demand for lactic acid as the raw material of poly lactic acid(PLA), which is a biodegradable polymer. Lactic acid production has been changing over from production by synthesis to production by fermentation, since the fermentation process is more nature friendly and economic. However, the fermentation method generates excess water and impurities with high boilers. The presence of high boilers and non volatility of lactic acid makes the separation of lactic acid very difficult job. Also, the purification-separation process requires the many investment costs and energy costs. Reactive distillation concept was also introduced for the process, giving higher selectivity and yield compared to the convention method. We introduce a new highly integrated process, reactive diving wall column, to reduce the capital and energy cost for producing a pure lactic acid. The reactive dividing wall column combines reactive distillation and dividing wall column. We compared capital and energy consumption required for the purification of lactic acid the between the proposed design structures. And we examined the effect of major process variables on the process performance and determined optimal process.

Keywords

Lactic Acid;Reactive Distillation;Recovery;RDWC

Acknowledgement

Supported by : 지식경제부

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