title: Study on solvent extraction of propionic acid from simulated discharged water in vitamin B12 production by anaerobic fermentation.
abstract: The potential of recovering propionic acid from discharged water in vitamin B(12) production by anaerobic fermentation was investigated in this paper. A primary amine, N(1923), was used as the extractant, kerosene as diluter and n-octanol as modifier. The influences of the content of N(1923) in the organic phase, the phase ratio and the pH of aqueous phase on the extraction yield of propionic acid were studied. The organic phase composition with the volume ratio was proposed of N(1923):kerosene:n-octanol as 45:35:20. Under conditions of the phase ratio (o/w) as 1:4, the pH of aqueous phase of 3.0 and after 5 min extraction, the extraction yield of propionic acid can be over 97%.
authors.affiliation: Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China.
authors.forename: Kang
authors.initials: K
authors.lastname: Wang
authors.forename: Zhidong
authors.initials: Z
authors.lastname: Chang
authors.forename: Yinchen
authors.initials: Y
authors.lastname: Ma
authors.forename: Chao
authors.initials: C
authors.lastname: Lei
authors.forename: Jing
authors.initials: J
authors.lastname: Wang
authors.forename: Tingyu
authors.initials: T
authors.lastname: Zhu
authors.forename: Huizhou
authors.initials: H
authors.lastname: Liu
authors.forename: Yanjun
authors.initials: Y
authors.lastname: Zuo
authors.forename: Xin
authors.initials: X
authors.lastname: Li
mesh_terms: D001421:Bacteria, Anaerobic / Q000378:metabolism*; D011422:Propionates / Q000737:chemistry / Q000302:isolation & purification*; D052616:Solid Phase Extraction / Q000379:methods*; D012997:Solvents / Q000737:chemistry; D014805:Vitamin B 12 / Q000737:chemistry / Q000378:metabolism*; D014867:Water; D014874:Water Pollutants, Chemical / Q000737:chemistry / Q000302:isolation & purification*; D018508:Water Purification / Q000379:methods*
chemical_list: D011422:Propionates; D012997:Solvents; D014874:Water Pollutants, Chemical; D014867:Water; C029658:propionic acid; D014805:Vitamin B 12