Vapor-phase oxidation of propylene glycol-methanol mixture to methyl lactate on CeO2/Al2O3 catalyst
No. 34 (2023), CONTENTS
No. 34 (2023)

Vapor-phase oxidation of propylene glycol-methanol mixture to methyl lactate on CeO2/Al2O3 catalyst

CONTENTS
https://doi.org/10.15407/kataliz2023.34.086
Published September 7, 2023
Mykhailo E. Sharanda
Institute for Sorption and Problems of Endoecology of the National Academy of Sciences of Ukraine, 13 General Naumov Str., Kyiv 03164, Ukraine
Artur M. Mylin
Institute for Sorption and Problems of Endoecology of the National Academy of Sciences of Ukraine, 13 General Naumov Str., Kyiv 03164, Ukraine
Oleksii Yu. Zinchenko
LTD “TechinserviceManafacturing Group” ,1MakiivskyiBystr., Kyiv, 04114, Ukraine
Volodymyr V. Brei
Institute for Sorption and Problems of Endoecology of the National Academy of Sciences of Ukraine, 13 General Naumov Str., Kyiv 03164, Ukraine
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Keywords

methyl lactate, lactide, propylene glycol, cerium dioxide, supported catalyst

How to Cite

Sharanda, M. E., Mylin, A. M., Zinchenko, O. Y., & Brei, V. V. (2023). Vapor-phase oxidation of propylene glycol-methanol mixture to methyl lactate on CeO2/Al2O3 catalyst. Catalysis and Petrochemistry, (34), 86-91. https://doi.org/10.15407/kataliz2023.34.086
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Abstract

The vapor-phase oxidation of mixtures of propylene glycol with methanol and ethanol to methyl and ethyl lactate, respectively, on supported CeO2/Al2O3 catalyst at 210-2500С was investigated. Air oxygen and a flow reactor with a fixed catalyst bed were used. A 20% solution of propylene glycol in alcohol was supplied to the reactor inlet. Oxidation of propylene glycol in the presence of methanol occurs according to the overall reaction CH3CHOHCH2OH +O2 + СН3OH = CH3CHOHCOOСН3 +2H2O. First, hydroxyacetone is formed, which is further oxidized to pyruvic aldehyde, which adds alcohol to form a hemiacetal. Next, this hemiacetal is rearranged according to Cannizzaro into methyl lactate. At 2200C and catalyst load < 2 mmol PG/gcat/h, the selectivity for methyl lactate reached 70 wt.% at 100% propylene glycol conversion. In the presence of ethanol, the formation of a significant amount of acetaldehyde and its aldol condensation products, as well as the formation of diethoxyethane, was observed. Therefore, the selectivity for ethyl lactate at 100% propylene glycol conversion did not exceed 45%.

https://doi.org/10.15407/kataliz2023.34.086
Article PDF (Українська)

References

Ukrainian Patent 145097 СО7С 69/75; 26.11.2020.

https://doi.org/10.25305/unj.214215

Hamad K., Kaseem M., Yang H.W., Deri F., Ko Y.G. Properties and medical applications of polylactic acid: Areview. Polymer Letters, 2015, 9(5), 435-455.

https://doi.org/10.3144/expresspolymlett.2015.42

Mylin A.M., Brei V.V. Selective conversion of an ethanolic solution of glycerol into ethyl lactate on СеO2/Al2O3 catalyst. Ukrainian chem. J., 2016, 82(2), 79-83. [in Ukrainian].

Purushothaman R., Haveren J., Es D. et al. Appl. Catal. B., 2014, 147, 92-100.

https://doi.org/10.1016/j.apcatb.2013.07.068

Montini T., Melchionna M., Monai M., Fornasiero P. Fundamentals and catalytic applications of CeO2-based materials. Chem. Rev., 2016, 116, 5987.

https://doi.org/10.1021/acs.chemrev.5b00603

Romanova I.V. Catalytic activity of copper and cerium oxides in the reaction of ethanol oxidation. Chem. Phys. Techn. Surface, 2010. 1(4), 436-440. [in Russian].

Brei V.V., Mylin A.M. Oxidation of alcohols on a cerium oxide catalyst: correlation between the activation energy of the reaction and δ (R13СОH) chemical shift. Ukrainian Chem. J., 2019, 85(8), 66-72. [in Ukrainian].

https://doi.org/10.33609/0041-6045.85.8.2019.66-72