Clean Alternative for Adipic Acid Synthesis Via Liquid-Phase Oxidation of Cyclohexanone and Cyclohexanol Over H3−2xCoxPMo12O40 Catalysts with Hydrogen Peroxide
Adipic acid (AA) was synthesized from the oxidation of cyclohexanol (-ol), cyclohexanone (-one) and cyclohexanol/cyclohexanone (-ol/-one) mixture over a series of H 3−2x Co x PMo 12 O 40 (x: 0.0–1.5) Keggin-type polyoxometalates as catalysts in the presence of hydrogen peroxide (30 %) under mild con...
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Veröffentlicht in: | Catalysis letters 2013-08, Vol.143 (8), p.749-755 |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | Adipic acid (AA) was synthesized from the oxidation of cyclohexanol (-ol), cyclohexanone (-one) and cyclohexanol/cyclohexanone (-ol/-one) mixture over a series of H
3−2x
Co
x
PMo
12
O
40
(x: 0.0–1.5) Keggin-type polyoxometalates as catalysts in the presence of hydrogen peroxide (30 %) under mild conditions (90 °C, 20 h) and in solvent free. The heteropolysalts were prepared from H
3
PMo
12
O
40
and Ba(OH)
2
using the cationic exchange method and characterized by Infrared and diffuse reflectance UV–Vis spectroscopies, X-ray diffraction and TG analyses. The catalytic tests showed that salts are more efficient than the corresponding heteropolyacid and among the H
3−2x
Co
x
PMo
12
O
40
(x: 0.25–1.5) series, H
1
Co
1
PMo
12
exhibits the highest AA yield for whole substrates, with ca. 76, 53 and 43 % from oxidation of -one, -ol and -ol/-one, respectively.
Graphical Abstract |
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ISSN: | 1011-372X 1572-879X |
DOI: | 10.1007/s10562-013-1025-3 |