1, ethylene is added with water to obtain ethanol, ethanol is oxidized to obtain acetic acid, acetic acid reacts with ethanol to obtain ethyl acetate, ethyl acetate is Claessen condensed to obtain ethyl acetoacetate, and pyruvic acid is obtained by acid hydrolysis; Ethylene and chlorine are added to obtain dichloroethane, which reacts with potassium cyanide to obtain succinonitrile, succinonitrile is hydrolyzed with acid to obtain succinic acid, ethylene is added with water to obtain ethanol, and ethanol reacts with succinic acid to obtain ethyl succinate.

2. Acetylene reacts with sodium cyanide to obtain acrylonitrile, acrylonitrile is hydrolyzed to obtain acrylic acid, and acrylic acid reacts with ethanol to obtain ethyl acrylate. Of course, if only ethanol is used, acetylene can be used to make ethanol, but it is not economical.