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Amine-based aqueous polymers for the simultaneous titration and extraction of lactic acid in aqueous two-phase systems

Planas, Jordi ; Varelas, Vassilios ; Tjerneld, Folke LU and Hahn-Hägerdal, Bärbel LU (1998) In Journal of Chromatography. B 711(1-2). p.265-275
Abstract
The partitioning of 10% (w/w) lactic acid in ethylene oxide propylene oxide (EOPO) random copolymers and dextran T500 aqueous two-phase systems was studied. An analysis of variance design was applied to investigate the effect of pH, polymer concentration, and addition of polyethyleneimine to the aqueous two-phase systems. The lowest lactate partition coefficient of 0.09 was obtained at pH 6 in the systems containing 7.2% (w/w) polyethyleneimine. The use of polyethyleneimine as titrating base during the fermentative production of lactic acid was evaluated in batch fermentations with 100 g/l glucose. Yield and productivity of polyethyleneimine titrated fermentations compared with those obtained in fermentations titrated with NaOH and KOH.
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author
; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Lactic acid
in
Journal of Chromatography. B
volume
711
issue
1-2
pages
265 - 275
publisher
Elsevier
external identifiers
  • scopus:0032569068
ISSN
1387-2273
DOI
10.1016/S0378-4347(97)00663-4
language
English
LU publication?
yes
id
f12d8d08-af64-4388-9485-602026c90c8a (old id 125598)
date added to LUP
2016-04-04 10:21:26
date last changed
2025-10-14 09:06:56
@article{f12d8d08-af64-4388-9485-602026c90c8a,
  abstract     = {{The partitioning of 10% (w/w) lactic acid in ethylene oxide propylene oxide (EOPO) random copolymers and dextran T500 aqueous two-phase systems was studied. An analysis of variance design was applied to investigate the effect of pH, polymer concentration, and addition of polyethyleneimine to the aqueous two-phase systems. The lowest lactate partition coefficient of 0.09 was obtained at pH 6 in the systems containing 7.2% (w/w) polyethyleneimine. The use of polyethyleneimine as titrating base during the fermentative production of lactic acid was evaluated in batch fermentations with 100 g/l glucose. Yield and productivity of polyethyleneimine titrated fermentations compared with those obtained in fermentations titrated with NaOH and KOH.}},
  author       = {{Planas, Jordi and Varelas, Vassilios and Tjerneld, Folke and Hahn-Hägerdal, Bärbel}},
  issn         = {{1387-2273}},
  keywords     = {{Lactic acid}},
  language     = {{eng}},
  number       = {{1-2}},
  pages        = {{265--275}},
  publisher    = {{Elsevier}},
  series       = {{Journal of Chromatography. B}},
  title        = {{Amine-based aqueous polymers for the simultaneous titration and extraction of lactic acid in aqueous two-phase systems}},
  url          = {{http://dx.doi.org/10.1016/S0378-4347(97)00663-4}},
  doi          = {{10.1016/S0378-4347(97)00663-4}},
  volume       = {{711}},
  year         = {{1998}},
}