Method for one-step synthesis of isobutyraldehyde V-Fe-M catalyst through methanol-ethanol

The invention discloses a method for one-step synthesis of isobutyraldehyde V-Fe-M catalyst through methanol-ethanol, and relates to a catalyst preparation method, which comprises: dissolving a certain amount of ammonium metavanadate in an aqueous solution, dissolving ferric nitrate and one or two selected from La nitrate, Co nitrate, Cu nitrate, Ag nitrate and other nitrates in an aqueous solution, mixing the two solutions, pouring into a hydrothermal reaction kettle, sealing, reacting for 2-30 h at a temperature of 80-180 DEG C, carrying out centrifugation separation, and respectively carrying out water washing and ethanol washing to prepare the V-Fe-M catalyst. With the catalyst of the present invention, the one-step synthesis of the isobutyraldehyde through methanol and ethanol can be effectively catalyzed, the ethanol conversion rate achieves more than or equal to 95%, the isobutyraldehyde selectivity is more than or equal to 85%, and the performance is stable.