文献类型：期刊文献

英文题名：Separation of 2,3-butanediol from fermentation broth by reactive-extraction using acetaldehyde-cyclohexane system

作者：Li, Yanjun[1];Wu, Yanyang[1];Zhu, Jiawen[1];Liu, Jiaxian[1]

机构：[1]E China Univ Sci & Technol, Engn Res Ctr, Shanghai 200237, Peoples R China

年份：2012

卷号：17

期号：2

起止页码：337

外文期刊名：BIOTECHNOLOGY AND BIOPROCESS ENGINEERING

收录：;EI(收录号：20122115037526);WOS:【SCI-EXPANDED(收录号:WOS:000302366300014)】；

基金：The authors are grateful to the National Natural Science Foundation of China (Grant No. 21106039).

语种：英文

外文关键词：reactive-extraction; 2,3-butandiol; ion-exchange resin; kinetic; equilibrium

摘要：Biochemical 2,3-butanediol is a renewable material with the potential to be used as an alternative fuel. However, in the lack of an effective separation process has limited its industrial application. In this paper, an effective process was achieved to separate 2,3-butanediol by reactive-extraction. Acetaldehyde and cyclohexane were chosen as the reactant and extractant, respectively. Ion-exchange resin HZ732 was used as the catalyst. Reaction equilibrium and a kinetic study on the reaction between 2,3-butanediol and acetaldehyde were investigated to provide basic data for process development. The reaction enthalpy and activation energy of reaction of 2,3-butanediol and acetaldehyde were -30.05 +/- 1.62 KJ/mol and 45.29 +/- 2.89 KJ/mol, respectively. Feasible conditions were obtained as follows: operating temperature = 20A degrees C, acetaldehyde: 2,3-butanediol = 0.5:1 (w/w), cyclohexane: fermentation broth = 0.5:1 (w/w), catalyst amount = 100 g/L, stirring rate = 500 rpm and three-stage counter-current extraction method was used. Under these conditions, the total yield rate of 2,3-butanediol from fermentation broth was over 90% and the mass fraction of 2,3-butanediol in the final product reached 99%.