A novel purification process for dodecanedioic acid by molecular distillation

Jiang Yu; Xigang Yuan; Aiwu Zeng

doi:10.1016/j.cjche.2014.10.019

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A novel purification process for dodecanedioic acid by molecular distillation

分离科学与工程 | Updated：2026-01-06

- A novel purification process for dodecanedioic acid by molecular distillation
- Chinese Journal of Chemical Engineering Vol. 23, Issue 3, Pages: 499-504(2015)
- Affiliations：
  
  State Key Laboratory of Chemical Engineering, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), School of Chemical Engineering and Technology, Tianjin University,Tianjin,China,300072
- Author bio：
- Funds：
- DOI：10.1016/j.cjche.2014.10.019
  CLC：
- Published：2015
- Accepted：
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Jiang Yu, Xigang Yuan, Aiwu Zeng. A novel purification process for dodecanedioic acid by molecular distillation[J]. , 2015, 23(3): 499-504.
DOI：

Jiang Yu, Xigang Yuan, Aiwu Zeng. A novel purification process for dodecanedioic acid by molecular distillation[J]. , 2015, 23(3): 499-504. DOI： 10.1016/j.cjche.2014.10.019.

摘要

Abstract

A novel purification process is involved to obtain the high purity [99%(by mass)

]

dodecanedioic acid (DC

). 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 DC

. Under the optimum conditions

distilling temperature 180℃

pressure 30 Pa and feed flow rate 700 ml·h

-1

the purity of DC

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.

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