caa a22 4500 463252381 CHVBK 20180405153344.0 cr unu---uuuuu 170326e20070201xx s 000 0 eng 10.1007/s10562-007-9015-y doi (NATIONALLICENCE)springer-10.1007/s10562-007-9015-y Selective oxidation of cyclohexane in supercritical carbon dioxide [Elektronische Daten] [K. Kerry Yu, A. Abutaki, Y. Zhou, B. Yue, H. He, S. Tsang] A feasibility study into the novel concept of using molecular oxygen to carry out one-step catalytic oxidation of cyclohexane to adipic acid in supercritical carbon dioxide over two types of catalysts, namely $${\hbox{Co}^{2+}/\hbox{Mn}^{2+}/\hbox{NaBr}}$$ and Ag polyoxometallate, the silver decamolybdodivanadophosphate $${(\hbox{Ag}_{5}\hbox{PMo}_{10}\hbox{V}_{2}\hbox{O}_{40})}$$ was carried out. Poor activity and selectivity towards adipic acid were initially noted over the aqueous micellar $${\hbox{Co}^{2+}/\hbox{Mn}^{2+}/\hbox{NaBr}}$$ catalyst for the cyclohexane oxidation in supercritical carbon dioxide while under comparable conditions, the same catalyst gave a high activity for alkylaromatics oxidation to corresponding acids. It was later found that the adipic acid, being the extremely polar oxidised products, was virtually insoluble in the supercritical phase, which was rapidly degraded to carbon oxides after its prolonged contact with catalyst and O2. Thus, the one-step cyclohexane oxidation to adipic acid with good selectivity can only be achieved by modifying the solvent with acetic acid or methanol, which enabled isolation of the acid from further oxidation. On the other hand, $${\hbox{Ag}_{5}\hbox{PMo}_{10}\hbox{V}_{2}\hbox{O}_{40}}$$ , in methanol modified supercritical carbon dioxide gave an impressive selectivity for cyclohexane conversion to other oxygenates. Springer Science+Business Media, LLC, 2007 supercritical carbon dioxide nationallicence oxidation nationallicence microemulsion nationallicence cyclohexane nationallicence heteropoly-acids nationallicence silver ion nationallicence catalysis nationallicence selectivity nationallicence Kerry Yu K. Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, 200433, Shanghai, P.R. China aut Abutaki A. Surface and Catalysis Research Centre, Department of Chemistry, University of Reading, RG6 6AD, Whiteknights, Reading, UK aut Zhou Y. Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, 200433, Shanghai, P.R. China aut Yue B. Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, 200433, Shanghai, P.R. China aut He H. Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, 200433, Shanghai, P.R. China aut Tsang S. Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, 200433, Shanghai, P.R. China aut Catalysis Letters Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 113/3-4(2007-02-01), 115-119 1011-372X 113:3-4<115 2007 113 10562 https://doi.org/10.1007/s10562-007-9015-y text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10562-007-9015-y text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Kerry Yu K. Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, 200433, Shanghai, P.R. China aut NATIONALLICENCE 700 1- Abutaki A. Surface and Catalysis Research Centre, Department of Chemistry, University of Reading, RG6 6AD, Whiteknights, Reading, UK aut NATIONALLICENCE 700 1- Zhou Y. Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, 200433, Shanghai, P.R. China aut NATIONALLICENCE 700 1- Yue B. Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, 200433, Shanghai, P.R. China aut NATIONALLICENCE 700 1- He H. Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, 200433, Shanghai, P.R. China aut NATIONALLICENCE 700 1- Tsang S. Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, 200433, Shanghai, P.R. China aut NATIONALLICENCE 773 0- Catalysis Letters Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 113/3-4(2007-02-01), 115-119 1011-372X 113:3-4<115 2007 113 10562 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer