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Co‐Al Hydrotalcites: Highly Active Catalysts for the One‐Pot Conversion of Fructose to 2,5‐Diformylfuran
Author(s) -
Raut Amol B.,
Bhanage Bhalchandra M.
Publication year - 2018
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201802771
Subject(s) - hydrotalcite , catalysis , yield (engineering) , chemistry , nuclear chemistry , molar ratio , fructose , inorganic chemistry , organic chemistry , materials science , metallurgy
In this work, a series of Co−Al hydrotalcites were synthesized in the molar ratio of 1:1(cat‐3), 2:1(cat‐4), 3:1(cat‐5). These synthesized Co−Al hydrotalcites were characterized by different characterization techniques such as XRD, XPS, FT‐IR, SEM, EDX, TGA, and N 2 physical adsorption. The catalytic properties of the prepared Co−Al hydrotalcites in different molar ratio were investigated for the dehydration of fructose to 5‐hydroxymethylfurfural (HMF), and selective oxidation of the HMF into 2,5‐diformylfuran (DFF). The complete conversion of HMF led to 95% yield of DFF at 120 °C under 3 bar oxygen pressure in dimethyl sulfoxide (DMSO) for 6 h. DFF in the yield of 87% with 100% conversion of fructose could be achieved in a one pot and two‐step reaction using Co−Al calacite in ratio of 2:1(cat‐4). A 77% yield of DFF was obtained in one‐pot and one‐step reaction using the same hydrotalcite catalyst. A DFF yield of 59% was achieved in a one pot and one‐step reaction using air as oxidant. After completion of the reaction, the catalyst can be separate very easily and can be reused up to four times without any significant loss in its catalytic activity.