Method for preparation of a precatalyst that contains a porous substrate and cobalt in oxide form, with the cobalt content being between 5 and 40% by weight in relation to the weight of the precatalyst, with said method comprising at least the following stages: - A first stage a) for impregnation of the porous substrate, by bringing into contact at least one solution that comprises at least one inorganic cobalt precursor at a temperature of between 5 and 40°C, with said impregnation making possible the deposition of 2 to 15% by weight of cobalt in relation to the weight of the final precatalyst, - A first stage b) for drying the intermediate precatalyst that is obtained at the end of the impregnation stage a), said drying is implemented in the presence of a gas that comprises air and/or an inert gas, with a flow rate of gas per hour and per gram of intermediate precatalyst that is obtained from stage a) (GHSV) of between 0.1 and 1.5 Nl/h/g, and at a temperature of between 60 and 110°C, - A first stage c) for calcination of the intermediate precatalyst that is obtained at the end of stage b), said calcination is implemented in the presence of a gas that comprises air and/or an inert gas, with a flow rate of gas per hour and per gram of intermediate precatalyst that is obtained from stage b) (GHSV) of between 0.1 and 1.5 Nl/h/g, and at a temperature of between 200 and 550°C, - A final impregnation stage d) of the intermediate precatalyst that is obtained at the end of a preceding calcination stage, by bringing said intermediate precatalyst into contact with at least one solution that comprises at least one inorganic cobalt precursor at a temperature of between 5 and 40°C, with said impregnation making it possible to reach the targeted cobalt content of the precatalyst, - A final drying stage e) of the intermediate precatalyst that is obtained at the end of the impregnation stage d), said drying is implemented in the presence of a gas that comprises air and/or an inert gas, with a flow rate of gas per hour and per gram of intermediate precatalyst that is obtained from stage d) (GHSV) of between 1.8 and 6.0 Nl/h/g, and at a temperature of between 110 and 160°C, - A final calcination stage f) of the intermediate precatalyst that is obtained at the end of stage e), said calcination is implemented in the presence of a gas that comprises air and/or an inert gas, with a flow rate of gas per hour and per gram of intermediate precatalyst that is obtained from stage e) (GHSV) of between 1.5 and 6.0 Nl/h/g, at a temperature of between 200 and 550°C. - A first stage a) for impregnation of the porous substrate, by bringing into contact at least one solution that comprises at least one inorganic cobalt precursor at a temperature of between 5 and 40°C, with said impregnation making possible the deposition of 2 to 15% by weight of cobalt in relation to the weight of the final precatalyst, - A first stage b) for drying the intermediate precatalyst that is obtained at the end of the impregnation stage a), said drying is implemented in the presence of a gas that comprises air and/or an inert gas, with a flow rate of gas per hour and per gram of intermediate precatalyst that is obtained from stage a) (GHSV) of between 0.1 and 1.5 Nl/h/g, and at a temperature of between 60 and 110°C, - A first stage c) for calcination of the intermediate precatalyst that is obtained at the end of stage b), said calcination is implemented in the presence of a gas that comprises air and/or an inert gas, with a flow rate of gas per hour and per gram of intermediate precatalyst that is obtained from stage b) (GHSV) of between 0.1 and 1.5 Nl/h/g, and at a temperature of between 200 and 550°C, - A final impregnation stage d) of the intermediate precatalyst that is obtained at the end of a preceding calcination stage, by bringing said intermediate precatalyst into contact with at least one solution that comprises at least one inorganic cobalt precursor at a temperature of between 5 and 40°C, with said impregnation making it possible to reach the targeted cobalt content of the precatalyst, - A final drying stage e) of the intermediate precatalyst that is obtained at the end of the impregnation stage d), said drying is implemented in the presence of a gas that comprises air and/or an inert gas, with a flow rate of gas per hour and per gram of intermediate precatalyst that is obtained from stage d) (GHSV) of between 1.8 and 6.0 Nl/h/g, and at a temperature of between 110 and 160°C, - A final calcination stage f) of the intermediate precatalyst that is obtained at the end of stage e), said calcination is implemented in the presence of a gas that comprises air and/or an inert gas, with a flow rate of gas per hour and per gram of intermediate precatalyst that is obtained from stage e) (GHSV) of between 1.5 and 6.0 Nl/h/g, at a temperature of between 200 and 550°C.