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In relation to this article, we declare that there is no conflict of interest.
Publication history
Received December 30, 2011
Accepted July 14, 2012
articles 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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Reactive extraction of 2,3-butanediol from fermentation broth

Chemical Engineering Research Center, East China University of Science & Technology, Shanghai 200237, China
Korean Journal of Chemical Engineering, January 2013, 30(1), 154-159(6), 10.1007/s11814-012-0114-0
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Abstract

Biochemical 2,3-butanediol is a renewable material, but the lack of an effective separation process limits its industrial application. We developed an effective separation process to recover 2,3-butanediol from fermentation broth by reactive-extraction with ion-exchange resin HZ732 as catalyst. n-Butylaldehyde was used as both reactant and extractant. Feasible operation conditions were obtained as follows: room temperature, Ccat=200 g·L^(-1), three-stage cross-current extraction, with reactant ratio (VButylaldehyde : Vfermentation broth) 0.05 for each stage. Reactive-extraction can recover over 98% of 2,3-butanediol in the form of 2-propyl-4,5-dimethyl-1,3-dioxolane from fermentation broth. Then 2,3-butanediol was obtained by hydrolyzing 2-propyl-4,5-dimethyl-1,3-dioxolane and purified by vacuum distillation. The total yield rate of 2,3-butanediol through the process was over 94% and purity of final product reached 99%.

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