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Hydrogenation of lactic acid to propylene glycol over copper-containing catalysts

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Abstract

Catalytic properties of different copper-containing catalysts synthesized from different precursors were studied in the hydrogenation of lactic acid at mild conditions. The most active catalyst was found to be chrysocolla-like copper hydroxysilicate with the copper loading of about 50 at%. At the optimal reaction conditions (T = 473 K, WHSV = 0.08 h−1), 95% conversion of lactic acid over this catalyst and 65% selectivity to 1,2-propylene glycol were achieved. The effect of the weight hourly space velocity (WHSV) on the lactic acid conversion and selectivity to propylene glycol was studied. It is found that the formation of propylene glycol and propanoic acid as a byproduct proceeds via parallel pathways.

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Acknowledgments

The authors thank M.P. Demeshkina for the catalyst preparation, V.I. Zheivot, who worked out the method for the quantitative GLC analysis of mixtures of carboxylic acids and glycols, and V.A. Utkin for the GLC/MS analysis. The authors express their gratitude to Prof. T.M. Yurieva, Prof. A.A. Khassin, Dr. T.P. Minyukova for helpful discussions.

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  1. Boreskov Institute of Catalysis, SB RAS, Novosibirsk, 630090, Russia

    Mikhail N. Simonov, Irina L. Simakova & Valentin N. Parmon

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  1. Mikhail N. Simonov
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  2. Irina L. Simakova
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  3. Valentin N. Parmon
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Correspondence to Irina L. Simakova.

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Simonov, M.N., Simakova, I.L. & Parmon, V.N. Hydrogenation of lactic acid to propylene glycol over copper-containing catalysts. React Kinet Catal Lett 97, 157–162 (2009). https://doi.org/10.1007/s11144-009-0005-5

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  • DOI: https://doi.org/10.1007/s11144-009-0005-5

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