Acrylic acid is an unsaturated organic acid, which contains carbon carbon double bond and carboxyl structure, so it can derive a series of compounds to form a large class of acrylic products. At present, it has formed a unique acrylic acid industry in the field of modern chemical industry. It has become an important derivative of propylene like polypropylene, acrylonitrile and propylene oxide. The excellent polymerization and esterification ability of acrylic acid provides a very important intermediate for the synthesis and preparation of various fine chemicals.