Tri-n-octylamine (TOA) was employed as extractant, and n-octanol, dichloromethane, ethyl acetate, methyl-iso-butyl ketone (MIBK), n-hexane and cyclohexane were used as diluents for the extraction of 3-hydroxypropionic acid (3-HP) from its dilute aqueous solution. The effects of diluents on extraction was explained. The influences of temperature, aqueous pH, phase ratio and volume fraction of TOA on the equilibrium distribution coefficient were investigated. The structure of organic phase loaded with 3-HP was studied by IR spectrometer and the mechanism of complexation extraction was explored and proposed. The results showed that n-octanol exhibited best extractability among the tested diluents, with a distribution coefficient of 4.46. Backward extraction was performed with sodium hydroxide aqueous solutions, and a backward extraction rate of 99.6% was obtained.
Yifan ZHU Yingbo LI Xiangfeng LIANG Mo XIAN Huizhou LIU
. Complexation Extraction of 3-Hydroxypropionic Acid from Its Dilute Solution[J]. The Chinese Journal of Process Engineering, 2017
, 17(6)
: 1176
-1181
.
DOI: 10.12034/j.issn.1009-606X.217158
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