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The selective dehydration of glucose to hydroxymethylfurfural (HMF) in a biphasic medium (water/methylisobuthylketone) has been studied by using different catalysts based on mesoporous MCM-41 silica containing ZrO 2 . These catalysts have been: (a) MCM-41 silica doped with Zr in the synthesis step and activated at 550 and 750°C, (b) this solid impregnated with sulphuric acid and activated...
Nitrobenzene was converted to p-aminophenol at 353K, using water as solvent and a bi-functional catalyst composed of a mechanical mixture of supported Pt catalyst with zirconium sulphate calcined at 773–923K. The performance of this system is independent of the support used for Pt, and various supports, such as pure or sulphated zirconia and titania, carbon, MgLa mixed oxide, give similar results...
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