“…Acrylic acid, which is an important raw material and resin monomer for organic synthesis, is widely used in the construction industry, textile industry, packaging products, sanitary materials, etc. [1][2][3][4][5] The methods to produce acrylic acid include cyanoethanol hydrolysis (alcoholysis), 6 acetylene carbonylation, [7][8][9][10][11] acrylonitrile hydrolysis, 12 and propylene oxidation. [13][14][15][16] Among them, the propylene oxidation technology has long been established and is widely used by companies in various countries.…”