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Mechanochemically synthesized LiAlOx catalyst for aqueous aldol condensation of furfural with acetone by L. N. Stepanova; R. M. Mironenko; O. B. Belskaya; V. A. Likholobov is a scholarly article available to read on EtoBox.

What is Mechanochemically synthesized LiAlOx catalyst for aqueous aldol condensation of furfural with acetone about?

In the present study, the mechanochemical method is proposed for synthesis of LiAl-layered double hydroxides (LDHs). This method is eco-friendly and allows obtaining LiAl-LDH under relatively mild conditions (centripetal acceleration of milling bodies 300 m s -2 ) and in a short period of time (15 minutes). The structures of as-prepared LiAl-LDH, LiAl-mixed oxide (calcined LDH) and "activated" LiAl-LDH obtained after rehydration of the corresponding mixed oxide were confirmed by X-ray diffraction. The basicity of LiAlO x was measured by temperature-programmed desorption of CO 2 and double isotherm technique. According to data obtained, LiAl-mixed oxide has a significant higher carbon dioxide adsorption capacity compared to MgAlmixed oxides prepared by conventional co-precipitation method. This indicates a large amount of basic surface sites with different strength (strong, medium and weak) for Li-containing systems. The formation of "activated" LiAl-LDH having Brønsted basic sites (OH groups in the interlayer space) provides an increased catalytic activity of LiAlO x in the reaction of aqueous-phase aldol condensation between furfural and acetone.

Author

L. N. Stepanova; R. M. Mironenko; O. B. Belskaya; V. A. Likholobov

Publisher

Portico

Published

2017

Language

EN