Catalytic hydroformylation of olefins over rhodium, bimetallic Rh-CO, and cobalt carbonyl clusters supported with some metal oxides
The specific activity for propylene hydroformylation of zinc oxide-supported rhodium carbonyl clusters (heat-treated at 160/sup 0/-180/sup 0/C under vacuum or a hydroformylation mixture) at 25/sup 0/-160/sup 0/C decreased in the order Rh/sub 4/(CO)/sub 12/ > Rh/sub 6/(CO)/sub 16/ > Rh/sub 7/(CO)/sub 16/3NEt/sub 4/ > Rh/sub 13/(CO)/sub 23/H/sub 2/2NBu/sub 4/ with a total decrease of about one order of magnitude. Various supported rhodium carbonyl complexes were inactive under the same conditions. The selectivities for normal isomer products of the clusters were higher for the larger clusters. The rhodium carbonyl clusters had similar specific activities when supported on magnesium, titanium, and zirconium oxides, but with these oxides, the selectivity for the iso-aldehyde was higher, and with these oxides and lanthanum oxide, further hydrogenation to alcohol occurred. The ethylene or propylene hydroformylation activity of supported rhodium/cobalt carbonyl bimetallic clusters was approximately proportional to the rhodium content, but the selectivity for normal aldehydes increased with increasing cobalt content. Rhodium clusters supported on acidic oxides showed very low activity.
- Research Organization:
- Sagami Chemical Research Center
- OSTI ID:
- 6138960
- Journal Information:
- J. Catal.; (United States), Journal Name: J. Catal.; (United States) Vol. 59:1; ISSN JCTLA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
400201 -- Chemical & Physicochemical Properties
400301* -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
ACTIVATION ENERGY
ALKENES
CARBONYLS
CATALYST SUPPORTS
CATALYTIC EFFECTS
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
COBALT COMPLEXES
COMPARATIVE EVALUATIONS
COMPLEXES
DATA
ENERGY
EXPERIMENTAL DATA
HIGH TEMPERATURE
HYDROCARBONS
INFORMATION
ISOMERS
KINETICS
MEDIUM TEMPERATURE
NUMERICAL DATA
ORGANIC COMPOUNDS
PROPYLENE
QUANTITY RATIO
REACTION KINETICS
RHODIUM COMPLEXES
TRANSITION ELEMENT COMPLEXES