Header menu link for other important links
X
Study of lactic acid extraction with higher molecular weight aliphatic amines
Thiyagarajan R. Swaminathan
Published in John Wiley & Sons Ltd, Chichester, United Kingdom
1998
Volume: 72
   
Issue: 2
Pages: 111 - 116
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.
About the journal
JournalData powered by TypesetJournal of Chemical Technology and Biotechnology
PublisherData powered by TypesetJohn Wiley & Sons Ltd, Chichester, United Kingdom
ISSN02682575
Open AccessNo
Concepts (24)
  •  related image
    Alcohols
  •  related image
    Amines
  •  related image
    Bacteria
  •  related image
    Composition effects
  •  related image
    Extraction
  •  related image
    Glucose
  •  related image
    Ketones
  •  related image
    Paraffins
  •  related image
    Ph effects
  •  related image
    Toxicity
  •  related image
    Yeast
  •  related image
    DILUENTS
  •  related image
    Lactic acid
  •  related image
    METHYLISOBUTYL KETONE (MIBK)
  •  related image
    TRIOCTYL AMINE (TOA)
  •  related image
    Organic acids
  •  related image
    Aliphatic amine
  •  related image
    LIQUID PARAFFIN
  •  related image
    OCTANOL
  •  related image
    Acid medium
  •  related image
    Article
  •  related image
    Fermentation
  •  related image
    Molecular weight
  •  related image
    pH