Cobalt catalyst comprising a support comprising a mixed oxide phase including cobalt and/or nickel produced from an organic compound from the family of carboyxyanhydrides

A process for preparing a catalyst containing an active cobalt phase, deposited on a support comprising alumina, silica or silica-alumina, said support containing a mixed oxide phase containing cobalt and/or nickel, said process comprising:

• a) bringing a support comprising alumina, silica or silica-alumina into contact with at least one solution containing at least one precursor of cobalt and/or of nickel, then drying at a temperature below 200° C. and calcining at a temperature of between 700° C. and 1200° C., so as to obtain a mixed oxide phase containing cobalt and/or nickel in the support, then
• b) bringing said support containing said mixed oxide phase into contact with at least one solution containing at least one precursor of cobalt,
• c) bringing said support containing said mixed oxide phase into contact with at least one organic compound that is an O-carboxyanhydride that is 5-methyl-1,3-dioxolane-2,4-dione or 2,5-dioxo-1,3-dioxolane-4-propanoic acid, or an N-carboxyanhydride that is 2,5-oxazolidinedione or 3,4-dimethyl-2,5-oxazolidinedione, b) and c) being able to be performed separately, in any order, or at the same time, and
• d) optionally then drying at a temperature below 200° C.