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Conflict of Interest: In relation to this article, we declare that there is no conflict of interest.

Publication history: Received October 14, 2003
Accepted December 25, 2003

This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Influence of Chain Length of Tertiary Amines on Extractability and Chemical Interactions in Reactive Extraction of Succinic Acid

Yeon Ki Hong Won Hi Hong^1†

Department of Chemical Engineering, Chungju National University, 123 Geomdan-ri, Iryu-myeon, Chungju, Chungbuk 380-702, Korea ¹Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), 373-1 Guseong-dong, Yuseong-gu, Daejeon 305-701, Korea

whhong@webmail.kaist.ac.kr

Korean Journal of Chemical Engineering, March 2004, 21(2), 488-493(6), 10.1007/BF02705439

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Abstract

Reactive extraction of succinic acid from aqueous solutions with various tertiary amines dissolved in 1-octanol and in n-heptane has been studied as a function of the chain length of the tertiary amine. In the tertiary amine extractants in 1-octanol, the extractabilities of tertiary amines were proportional to their chain length. But, in n-heptane, the extractabilities of tertiary amines decreased with their chain length. In order to analyze chemical interactions involved in the complexation of succinic acid with amine extractants in 1-octanol and n-heptane, infrared (IR) spectroscopy was used. From IR spectroscopy, it was found that the difference of extractability in 1-octanol and in n-heptane was mainly due to the different degree of intramolecular hydrogen bonding of succinic acid with the polarity of diluents. And the possible stoichiometry of acid-amine-diluent complex was predicted as (1,1), (2,1), (1,1,1).

Keywords

Succinic Acid Chain Length of Amine Intramolecular Hydrogen Bond Polarity

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