METHOD FOR OBTAINING A CATALYST OF OXIDATIVE DEHYDROGENATION OF ETHANE Russian patent published in 2018 - IPC B01J37/34 B01J27/57 B01J23/16 

FIELD: technological processes.

SUBSTANCE: invention relates to a process for preparing nanoparticles of a catalyst for the oxidative dehydrogenation of hydrocarbons under conditions of microwave activation (heating) of the reaction mass, and in particular Mo-V-Te-Nb-O_x oxidative dehydrogenation catalyst of ethane (ODE). Method for the preparation of a catalyst for the reaction of ODE based on mixed transition metal oxides selected from the group Mo, V, Te and Nb is described in the sequential mixing and dissolution of ammonium molybdotellurate salts, vanadium sulphate and niobium oxalate in polar organic solvents such as N,N'-dimethylformamide (DMF) and dimethyl sulfoxide (DMSO), solvents that are rapidly and efficiently heated by microwave energy. Reaction mass under atmospheric pressure is subjected to a short (10–15 minutes) microwave heating to a temperature of 153–160 °C in the chamber of a household microwave oven with a power of 200 watts, and then a quick (up to 5 minutes) cooling to room temperature. Resulting highly dispersed precursor catalyst precipitate is separated by centrifugation, washed in water, dried and calcined at 600 °C in an inert gas flow (nitrogen) to form a highly efficient Mo_1.0V_0.37Te_0.17Nb_0.12O₃ ODE catalyst.

EFFECT: advantage of the proposed method over the known process is the reduction in the temperature, pressure and duration of synthesis of the mixed oxide catalyst, as well as simplification of the technology and reduction of energy costs.

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