Catalyst and process for manufacturing a ketone by dehydrogenation of a secondary alcohol
AssigneeInstitut Francais du Petrole
InventorsJean-Paul Bournonville, Roger Snappe, Jean Miquel, Germain Martino
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Abstract
A secondary alcohol dissolved in a C.sub.12 to C.sub.20 paraffinic hydrocarbon substantially free of aromatics and of sulfur is dehydrogenated to the corresponding ketone at a temperature of 170.degree.-230.degree. C. in the presence of a catalyst of the Raney nickel type containing from 0.1 to 10% by weight of an additional metal consisting of copper, silver, gold, tin, lead, zinc, cadmium, indium or germanium, the ketone being preferably removed, as it is formed, from the reaction medium. A catalyst for use in the present process is provided.
Claims17
In a process comprising contacting a secondary alcohol, in the liquid phase and in the presence of a solvent, with a dehydrogenation catalyst, and recovering the resultant ketone,
- the improvement wherein said catalyst consists essentially of a Raney nickel catalyst and 0.1-10% by weight, expressed as elemental metal and with respect to the Raney nickel, of at least one additional metal, said additional metal being copper, silver, gold, tin, lead, zinc, cadmium, indium or germanium;
- wherein the reaction is effected at a temperature of about 170.degree.-230.degree. C.;
- and wherein said solvent is a C.sub.12-20 paraffinic hydrocarbon or hydrocarbon cut having a content of aromatic hydrocarbons and aromatic hydrocarbon generators, expressed as benzene, lower than 1,000 ppm and a sulfur content lower than 500 ppm;
- whereby hydrogenolysis to produce degradation products is reduced and the selectivity of the dehydrogenation is increased.
A catalyst suitable for catalyzing the dehydrogenation of secondary alcohols to ketones, consisting essentially of Raney nickel and 0.1-10% by weight, expressed as elemental metal and with respect to the Raney nickel, of at least one additional metal, said additional metal being copper, silver, gold, tin, lead, zinc, cadmium, indium or germanium.
Dependencies are inferred from the claim text.