Catalyst and preparation method for the synthesis of acrylic acid

The present invention relates to a catalyst for the synthesis of acrylic acid, acrylic acid and a method for preparing a catalyst for synthesizing, mainly solves the prior art lower catalyst activity and selectivity problems. The present invention is synthesized by oxidation of acrolein using a catalyst acrylic acid, in parts by weight comprises the following components: 5-60 parts hydrotalcite carrier; and which carries thereon the active ingredient 40-95 parts Mo12VaCubWcXdYeZfOg; wherein X represents Cr, Mn, at least one element of Sb; Y is selected from Fe, Bi, Co, Ni, Ge, Ga, Nb, Ce, La, Zr, at least one element of Sr; Z is selected from an alkali metal or an aspect of at least one element of alkaline earth metals, solves this problem, it can be used in industrial production of acrylic acid.