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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/1805
Title: Study of lactic acid extraction with higher molecular weight aliphatic amines
Authors: Choudhury, Bijan
Basha A.
Swaminathan T.
Published in: Journal of Chemical Technology and Biotechnology
Abstract: Lactic acid extraction was studied with two extractants, trioctyl amine (TOA) and Aliquat 336, in three diluents (methylisobutyl ketone (MIBK), octanol and paraffin liquid). The effects of organic phase extractant concentration and aqueous phase pH on the extraction process were examined. Among the extractants, TOA was found to be a better extractant than Aliquat 336 in all the diluents. In experiments with 50% (v/v) TOA in methylisobutyl ketone, 79% lactic acid could be extracted (initial lactic acid concentration 86.96 g dm-3). MIBK had a profound effect on the extraction behaviour of TOA in comparison with octanol and paraffin liquid while none of the diluents affected the extraction with Aliquat 336. The extraction of lactic acid was favoured at low pH. The toxicities of TOA and the diluents to Lactobacillus rhamnosus NRRL B445 were also studied. While TOA was found to be highly toxic at the molecular and the phase level, the paraffin liquid was totally non-toxic. The extraction of glucose and yeast extract by TOA and the diluents used was found to be low, which thus enables the selective extraction of lactic acid.Lactic acid extraction was studied with two extractants, trioctyl amine (TOA) and Aliquat 336, in three diluents (methylisobutyl ketone (MIBK), octanol and paraffin liquid). The effects of organic phase extractant concentration and aqueous phase pH on the extraction process were examined. Among the extractants, TOA was found to be a better extractant than Aliquat 336 in all the diluents. In experiments with 50% (v/v) TOA in methylisobutyl ketone, 79% lactic acid could be extracted (initial lactic acid concentration 86.96 g dm-3). MIBK had a profound effect on the extraction behaviour of TOA in comparison with octanol and paraffin liquid while none of the diluents affected the extraction with Aliquat 336. The extraction of lactic acid was favoured at low pH. The toxicities of TOA and the diluents to Lactobacillus rhamnosus NRRL B445 were also studied. While TOA was found to be highly toxic at the molecular and the phase level, the paraffin liquid was totally non-toxic. The extraction of glucose and yeast extract by TOA and the diluents used was found to be low, which thus enables the selective extraction of lactic acid.
Citation: Journal of Chemical Technology and Biotechnology (1998), 72(2): 111-116
URI: https://doi.org/10.1002/(SICI)1097-4660(199806)72:2<111
http://repository.iitr.ac.in/handle/123456789/1805
Issue Date: 1998
Publisher: John Wiley & Sons Ltd, Chichester, United Kingdom
Keywords: Diluent
Distribution coefficient
Extractant
Lactic acid
Molecular level toxicity
Phase level toxicity
Selectivity
ISSN: 2682575
Author Scopus IDs: 7103333522
7003946513
9640131800
Author Affiliations: Choudhury, B., Biotechnology Research Center, Department of Chemical Engineering, Indian Institute of Technology, Madras, Chennai-600 036, India
Basha, A., Biotechnology Research Center, Department of Chemical Engineering, Indian Institute of Technology, Madras, Chennai-600 036, India
Swaminathan, T., Biotechnology Research Center, Department of Chemical Engineering, Indian Institute of Technology, Madras, Chennai-600 036, India
Corresponding Author: Swaminathan, T.; Biotechnology Research Center, Department of Chemical Engineering, Indian Institute of Technology, Madras, Chennai-600 036, India
Appears in Collections:Journal Publications [BT]

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