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Research Journals >
Indian Journal of Chemical Technology (IJCT) >
IJCT Vol.12 [2005] >
IJCT Vol.12(4) [July 2005] >
| Title: | Pinacol-Pinacolone rearrangement over solids supported metal ion catalysts |
| Authors: | Shamshuddin, S Z Mohamed
Kuriakose, George
Nagaraju, N |
| Keywords: | Pinacol rearrangement
dehydration
solid acids
supports and supported metal ion catalysts |
| Issue Date: | Jul-2005 |
| Publisher: | CSIR |
| IPC Code: | B01J21/00 |
| Abstract: | Catalytic activity of hydrated Al2O3,
SiO2, ZrO2, AlPO4, zeolite-HY and
Fe(III) ions supported on these solids has been evaluated in pinacol-pinacolone
rearrangement (2,3-dimethyl-2,3-butanediol to 3,3-dimethyl-2-butanone). The
effect of method of preparation of catalysts on their catalytic activity has
been evaluated. Studies on catalytic activity have been performed in vapour
phase at different reaction temperatures. Pinacolone and
2,3-dimethyl-1,3-butadiene were formed as the major products. The percentage
conversion of pinacol and the selectivity of the products have been found to be
influenced by the reaction temperature, the nature of the support, the metal
ion present on the support and the method of preparation of supported
catalysts. Al2O3 and AlPO4 containing 5% Fe
ions on their surface are found to convert pinacol to pinacolone to an extent
of 88% with a selectivity of 83% for ketone at 200 °C with 10 mL/h flow rate of the reactant. A comparative study of the
catalytic activity of the materials containing 5% Fe ions on Al2O3
and those containing same percentage of Ni or Co ions in the chosen reaction at
200 °C, revealed a good correlation between
the redox potential of the metal ions and their selective catalytic activity in
the formation of pinacolone. |
| Page(s): | 447-454 |
| ISSN: | 0975-0991 (Online); 0971-457X (Print) |
| Source: | IJCT Vol.12(4) [July 2005]
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