Selective hydrogenation with the use of nanocatalysts

Selective hydrogenation of phenol and related derivatives

“…It is found that the selectivity to cyclohexanone is unaffected by the temperature within a specific phenol conversion range. 40,63 Baumgarten et al used polymers with nitrogen functionalities such as poly{acrylamide-co- [3-(acryloylamino)propyltrimethylammonium chloride]}. The electron donation from the nitrogen centers of the support to the active metal sites changes the adsorption property of metals.…”

Selective reduction of phenol derivatives to cyclohexanones in water under microwave irradiation

“…4 The hydrogenation of phenol is usually going through two different processes: (1) phenol is hydrogenated to cyclohexanol and then the produced cyclohexanol dehydrogenates to cyclohexanone at high temperatures; 5,6 (2) phenol is selectively hydrogenated to cyclohexanone directly over the suitable catalysts under the optimized conditions. [7][8][9][10][11] The gas phase phenol hydrogenation is usually performed at high temperature over supported Pd [7][8][9][10] or Pt 11 catalysts, it was reported that the selectivity of cyclohexanone could be reached up to 95% over 5% Pt-0.4-4% Cr/C 11 and nanotubular titanate supported Pd catalysts 9 at 200 1C. However, gas phase hydrogenation suffers from some disadvantages like harsh reaction conditions and the catalyst deactivation induced by the unavoidable coke deposition.…”