SCI和EI收录∣中国化工学会会刊

›› 2015, Vol. 23 ›› Issue (3): 499-504.DOI: 10.1016/j.cjche.2014.10.019

• Separation Science and Engineering • Previous Articles     Next Articles

A novel purification process for dodecanedioic acid by molecular distillation

Jiang Yu, Xigang Yuan, Aiwu Zeng   

  1. State Key Laboratory of Chemical Engineering, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
  • Received:2014-05-26 Revised:2014-10-21 Online:2015-04-03 Published:2015-03-28

A novel purification process for dodecanedioic acid by molecular distillation

Jiang Yu, Xigang Yuan, Aiwu Zeng   

  1. State Key Laboratory of Chemical Engineering, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
  • 通讯作者: Aiwu Zeng

Abstract: A novel purification process is involved to obtain the high purity [>99%(by mass)] dodecanedioic acid (DC12). It involves a re-crystallization followed bymolecular distillation fromthe crude product. The objective of this study is to investigate general conditions, feed rate, distilling temperature and vacuum, necessary for centrifugal distillation of DC12. Under the optimum conditions, distilling temperature 180℃, pressure 30 Pa and feed flow rate 700 ml·h-1, the purity of DC12 in the residence reached 97.55% with a yield of 53.18% by the analysis of gas chromatography. Multiple-pass distillation made a considerable contribution by improving the purity to 99.22%. Additionally, the effect of pretreatment (re-crystallization) on distillation process was revealed through a series of comparative experiments.

Key words: Dodecanedioic acid, Fermentation, Purification, Separation, Molecular distillation

摘要: A novel purification process is involved to obtain the high purity [>99%(by mass)] dodecanedioic acid (DC12). It involves a re-crystallization followed bymolecular distillation fromthe crude product. The objective of this study is to investigate general conditions, feed rate, distilling temperature and vacuum, necessary for centrifugal distillation of DC12. Under the optimum conditions, distilling temperature 180℃, pressure 30 Pa and feed flow rate 700 ml·h-1, the purity of DC12 in the residence reached 97.55% with a yield of 53.18% by the analysis of gas chromatography. Multiple-pass distillation made a considerable contribution by improving the purity to 99.22%. Additionally, the effect of pretreatment (re-crystallization) on distillation process was revealed through a series of comparative experiments.

关键词: Dodecanedioic acid, Fermentation, Purification, Separation, Molecular distillation