Effects of ammonium lactate on 2,3-pentanedione formation from lactic acid

Research output: Contribution to journalArticle

  • 16 Citations

Abstract

Ammonia is often used for pH adjustment during fermentation of glucose to lactic acid. Its presence as ammonium lactate in the catalytic upgrading of lactic acid to 2,3-pentanedione over CsOH/silica reduces diketone yields to nearly zero at high ammonia levels. Removal of ammonia from the feed restores 2,3-pentanedione yield, indicating that the catalyst itself is not poisoned by ammonia. Instead, 2,3-pentanedione continues to form in the presence of ammonia and is consumed in secondary reactions downstream of the catalyst bed. Both base-catalyzed self-condensation of 2,3-pentanedione to duroquinone (and oligomeric species) and direct reaction of ammonia with the diketone are observed.

LanguageEnglish (US)
Pages3873-3877
Number of pages5
JournalIndustrial and Engineering Chemistry Research
Volume38
Issue number10
StatePublished - 1999

Profile

Lactic acid
Ammonia
Lactic Acid
ammonium
ammonia
acid
catalyst
Catalysts
Silicon Dioxide
Fermentation
fermentation
Glucose
effect
2,3-pentanedione
condensation
Condensation
glucose
silica
Silica

ASJC Scopus subject areas

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

Cite this

Effects of ammonium lactate on 2,3-pentanedione formation from lactic acid. / Tam, Man S.; Jackson, James E.; Miller, Dennis J.

In: Industrial and Engineering Chemistry Research, Vol. 38, No. 10, 1999, p. 3873-3877.

Research output: Contribution to journalArticle

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