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Catalytic Isomerization of Dihydroxyacetone to Lactic Acid and Alkyl Lactates over Hierarchical Zeolites Containing Tin

1
Faculty of Chemistry, Nicolaus Copernicus University, 7 Gagarina Str., 87-100 Torun, Poland
2
Faculty of Chemistry, Adam Mickiewicz University, 89b Umultowska Str., 61-614 Poznan, Poland
*
Author to whom correspondence should be addressed.
Catalysts 2018, 8(1), 31; https://doi.org/10.3390/catal8010031
Received: 18 December 2017 / Revised: 10 January 2018 / Accepted: 11 January 2018 / Published: 17 January 2018
Hierarchical zeolites containing tin were obtained, characterized and used in a reaction of catalytic isomerization of dihydroxyacetone (DHA) to lactic acid and alkyl lactates. These catalysts are characterized by preserved crystallinity and primary microporosity with the simultaneous existence of secondary porosity regarding mesopores, which facilitates access of large molecules of reagents to active centers. Creation of additional porosity was confirmed by X-ray diffraction and low-temperature nitrogen adsorption/desorption studies. The reaction of dihydroxyacetone isomerization was conducted in different reaction media such as methanol, ethanol or water with the use of two heating methods: microwave radiation and conventional heating. The application of microwave radiation enabled to reduce the reaction time to 1 h and achieve dihydroxyacetone conversion of >90% and high yields of the desired reaction products. View Full-Text
Keywords: hierarchical zeolites containing tin; alkyl lactates; lactic acid hierarchical zeolites containing tin; alkyl lactates; lactic acid
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Feliczak-Guzik, A.; Sprynskyy, M.; Nowak, I.; Buszewski, B. Catalytic Isomerization of Dihydroxyacetone to Lactic Acid and Alkyl Lactates over Hierarchical Zeolites Containing Tin. Catalysts 2018, 8, 31.

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