METHOD OF PREPARING MULTICOMPONENT COMPOSITE METAL OXIDE CATALYST

摘要

Provided are a method of preparing a multicomponent bismuth-molybdenum composite metal oxide catalyst, and a multicomponent bismuth-molybdenum composite metal oxide catalyst prepared thereby. According to the preparation method, since the almost same structure as that of a typical quaternary bismuth-molybdenum catalyst may be obtained by performing two-step co-precipitation, i.e., primary and secondary co-precipitation, of metal components constituting the catalyst, the reduction of catalytic activity due to the deformation of the structure of the catalyst may be suppressed. Also, since the multicomponent bismuth-molybdenum composite metal oxide catalyst may adjust the number of lattice oxygens consumed during a reaction to increase the catalytic activity, the multicomponent bismuth-molybdenum composite metal oxide catalyst may reduce the formation of by-products and may improve the conversion rate of reactant and the yield of desired product in a catalytic reaction process using the above catalyst, particularly, a catalytic reaction process under a relatively low temperature condition.

主权项

1. A method of preparing a multicomponent bismuth-molybdenum composite metal oxide catalyst represented by Formula 1, the method comprising steps of:
(1) preparing a first solution by mixing a divalent or trivalent cationic metal precursor solution, a monovalent cationic metal precursor solution, and a bismuth precursor solution; (2) preparing a second solution by dropwise adding the first solution to a molybdenum precursor solution and performing primary co-precipitation; (3) preparing a fourth solution by dropwise adding a third solution including a tetravalent cationic metal precursor during an aging process of the second solution and performing secondary co-precipitation; and (4) sintering after drying the fourth solution:
[MoaBibCcDdEeOf]  [Formula 1] wherein C represents a divalent or trivalent cationic metal element, D represents a monovalent cationic metal element, E represents a tetravalent cationic metal element, a is a real number of 5 to 20, b is a real number of 0.1 to 2, c is a real number of 1 to 5, d is a real number of 1 to 10, e is a real number of 0.1 to 1, and f is a value which is determined by other components to match valency.