MIXTURE OXIDE CATALYST FOR PREPARING NITRILE COMPOUND AND METHOD FOR PREPARING THEREOF

摘要

PURPOSE: Provided are a mixture oxide catalyst having a core-shell structure and improved yield of acrylonitrile for preparing nitrile compound and a method for preparing thereof. CONSTITUTION: The method for preparing a mixture oxide catalyst represented by the following chemical formula 1 of £BinAaBbQqRrOx|£(100-z)%FefNigMomOy + Z%SiO2| comprises steps of (a) forming a core portion by mixing a solution containing iron and nickel with a solution containing molybdenum and silica sol, adjusting the pH of the mixture solution into 3-5, proceeding a slurry reaction, drying and pulverizing it; and (b) forming a shell portion by impregnating the pulverized substance of the core with a solution containing bismuth, A, B, Q and R, wherein A is at least one element selected from boron, phosphorous and molybdenum, B is at least one element having a valence of 1-2, Q is at least one element having a valence of 3-6, R is precious metal element and at least one element having a valence of 0-6; n is 0.01-3, a is 0-3, b is 0-3, q is 0-3, r is 0.001-5, f is 0.01-5, g is 0.1-5 and z is 0-90 provided that m is 1; each x and y is a value determined to set the valence by other elements in the core portion and the shell portion.