Oligomer distribution in concentrated lactic acid solutions

Dung T. Vu, Aspi K. Kolah, Navinchandra S. Asthana, Lars Peereboom, Carl T. Lira, Dennis J. Miller

Research output: Contribution to journalArticle

  • 44 Citations

Abstract

Lactic acid (2-hydroxypropanoic acid) is a significant platform chemical for the biorenewable economy. Concentrated aqueous solutions of lactic acid (>30 wt.%) contain a distribution of oligomers that arise via intermolecular esterification. As a result, the titratable acidity changes non-linearly with acid concentration. In this work, the oligomer distribution of lactic acid is characterized using GC, GC/MS, and HPLC to extend existing literature data, and titratable acidity is measured via titration with NaOH. A thermodynamic model with a single parameter is proposed that accurately represents oligomer distribution and titratable acidity over the full range of lactic acid concentrations.

LanguageEnglish (US)
Pages125-135
Number of pages11
JournalFluid Phase Equilibria
Volume236
Issue number1-2
DOIs
StatePublished - Sep 20 2005

Profile

lactic acid
Lactic acid
oligomers
Oligomers
Lactic Acid
Acidity
acidity
acids
Acids
Esterification
economy
Titration
titration
platforms
Thermodynamics
aqueous solutions
thermodynamics

Keywords

  • 2-Hydroxypropionic acid
  • Alpha-hydroxy acid
  • Chemical theory
  • Esterification
  • Lactic acid
  • Oligomerization

ASJC Scopus subject areas

  • Fluid Flow and Transfer Processes
  • Physical and Theoretical Chemistry

Cite this

Oligomer distribution in concentrated lactic acid solutions. / Vu, Dung T.; Kolah, Aspi K.; Asthana, Navinchandra S.; Peereboom, Lars; Lira, Carl T.; Miller, Dennis J.

In: Fluid Phase Equilibria, Vol. 236, No. 1-2, 20.09.2005, p. 125-135.

Research output: Contribution to journalArticle

Vu, DT, Kolah, AK, Asthana, NS, Peereboom, L, Lira, CT & Miller, DJ 2005, 'Oligomer distribution in concentrated lactic acid solutions' Fluid Phase Equilibria, vol 236, no. 1-2, pp. 125-135. DOI: 10.1016/j.fluid.2005.06.021
Vu DT, Kolah AK, Asthana NS, Peereboom L, Lira CT, Miller DJ. Oligomer distribution in concentrated lactic acid solutions. Fluid Phase Equilibria. 2005 Sep 20;236(1-2):125-135. Available from, DOI: 10.1016/j.fluid.2005.06.021
Vu, Dung T. ; Kolah, Aspi K. ; Asthana, Navinchandra S. ; Peereboom, Lars ; Lira, Carl T. ; Miller, Dennis J./ Oligomer distribution in concentrated lactic acid solutions. In: Fluid Phase Equilibria. 2005 ; Vol. 236, No. 1-2. pp. 125-135
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