Reaction and kinetic studies of lactic acid conversion over alkali-metal salts

Man S. Tam, Radu Craciun, Dennis J. Miller, James E. Jackson

Research output: Contribution to journalArticle

  • 35 Citations

Abstract

Studies of lactic acid catalytic conversion over alkali salts and bases on silica demonstrate that the yield of 2,3-pentanedione (23P) increases with decreasing Lewis acidity of the alkali metal, from 15% for lithium hydroxide at 320°C to 49% for cesium hydroxide at 280°C. The rate of 23P formation varies linearly with alkali metal loading up to saturation at 2 mmol of catalyst/g of support. Experiments with different silica supports showed that acetaldehyde formation increases with support acidity, reducing 23P yield. Postreaction FTIR studies indicate the presence of alkali lactate as the dominant species on the support surface at reaction conditions. These results, along with the kinetic model developed, support the proposed mechanism of 23P formation as a condensation between lactic acid and alkali lactate.

LanguageEnglish (US)
Pages2360-2366
Number of pages7
JournalIndustrial and Engineering Chemistry Research
Volume37
Issue number6
StatePublished - 1998

Profile

Alkali Metals
alkali metal
Alkali metals
Lactic acid
Acidity
Lactic Acid
Alkalies
Salts
Silica
salt
kinetics
Kinetics
Acetaldehyde
acid
Cesium
Catalyst supports
Silicon Dioxide
hydroxide
acidity
Condensation

ASJC Scopus subject areas

  • Polymers and Plastics
  • Environmental Science(all)
  • Chemical Engineering (miscellaneous)

Cite this

Reaction and kinetic studies of lactic acid conversion over alkali-metal salts. / Tam, Man S.; Craciun, Radu; Miller, Dennis J.; Jackson, James E.

In: Industrial and Engineering Chemistry Research, Vol. 37, No. 6, 1998, p. 2360-2366.

Research output: Contribution to journalArticle

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