The selective hydrogenation of propyne over a copper/silica catalyst prepared from a monolayer film of copper 2,2{prime}-bipyridine dimer on Cab-O-Sil
- Georgia Institute of Technology, Atlanta, GA (United States)
The hydrogenation of propyne to propene is a reaction of commercial interest to the polyolefins industry. A copper catalyst for this reaction is desirable as the diolefins and alkynes will be saturated to monoolefins only. However, one serious side reaction is the oligomerization of C{sub 3} adsorbed species to nonvolatiles called {open_quotes}green oil{close_quotes} by the industry. Zippert and White showed that Cu/silica catalysts which were prepared from Cu(acac){sub 2}/Cab-O-Sil catalyze the desired reaction with high selectivities to propene (60-90%); however, these catalysts were much less active than the low-dispersion Cu/silica catalysts made by aqueous impregnation. These low-dispersion catalysts (ca., 10-20%) suffered from low selectivities to propene (20%) with the oligomer as the major product. These data suggested that the yield of propene was influenced by the type of Cu precursor. Here, the authors report studies on the activity of Cu/SiO{sub 2} catalysts obtained from monolayer film dispersion of copper-2,2{prime}-bipyridine complexes over the silica surface. 25 refs., 5 figs.
- OSTI ID:
- 468700
- Journal Information:
- Journal of Catalysis, Journal Name: Journal of Catalysis Journal Issue: 2 Vol. 164; ISSN 0021-9517; ISSN JCTLA5
- Country of Publication:
- United States
- Language:
- English
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