Novel acrylic acid synthesis method

The invention discloses a novel acrylic acid synthesis method which comprises the following steps: A, separating maleic anhydride from an acrylic acid heavy component, heating and stirring in water, and hydrolyzing to obtain maleic acid; b, concentrating the reaction mixture by removing water in vacuum, and performing high-selectivity and quantitative hydrolysis to obtain maleic acid; c, maleic acid, a Hoveyda-Grubbs II catalyst, ethylene and a solvent are added into the reaction tank for a catalytic mixing reaction, then acrylic acid is obtained in a high yield, the reaction risk can be reduced through mild reaction conditions, self-polymerization of acrylic acid can be reduced due to the low reaction temperature, acrylic acid is produced by recycling the valuable substance maleic anhydride in heavy components, and the production cost is reduced. The economical efficiency of the reaction is greatly improved. 本发明公开了一种新型丙烯酸合成方法，合成方法包括以下步骤：A、在丙烯酸重组分中分离出马来酸酐，经在水中加热搅拌，水解为马来酸；B、然后通过在真空中除去水来浓缩反应混合物，高选择性和定量水解为马来酸；C、