Zeolite H-USY for the production of lactic acid and methyl lactate from C-3-sugars

Publication: Research - peer-reviewJournal article – Annual report year: 2010

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Lactic acid is an interesting platform chemical with many promising applications. This includes the use as a building block for the production of biodegradable plastics and environmentally friendly solvents. A study of the liquid-phase conversion of the triose-sugars, glyceraldehyde and dihydroxyacetone directly to methyl lactate and lactic acid catalyzed by inexpensive commercially available zeolites is presented. One particular zeolite, H-USY (Si/Al = 6) is shown to be quite active with near quantitative yields for this isomerization. Deactivation of the H-USY-zeolite was studied by correlating the catalytic activity to data obtained by TPO, XRD, N-2-sorption, and NH3-TPD on fresh and used catalysts. Coking and irreversible framework damage occurs when lactic acid is produced under aqueous conditions. In methanol, methyl lactate is produced and catalyst deactivation is suppressed. Additionally, reaction rates for the formation of methyl lactate in methanol are almost an order of magnitude higher as compared to the rate of lactic acid formation in water.
Original languageEnglish
JournalJournal of Catalysis
Publication date2010
Volume269
Issue1
Pages122-130
ISSN0021-9517
DOIs
StatePublished
CitationsWeb of Science® Times Cited: 51

Keywords

  • Triose sugar, Dihydroxyacetone, Methyl lactate, Zeolite, Lactic acid, Glyceraldehyde, H-USY, Deactivation, Biomass
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