Diethyl carbonate (DEC) is an important substance in carbonates, which is a colorless liquid with a special aroma at room temperature. It can be used as an intermediate in chemical production and has a wide range of applications. Diethyl carbonate is widely used as a methylating agent, carbonylating agent, and carbonylating agent in organic synthesis. It is used as a solvent for nitrocellulose, cellulose ether, synthetic resins, and natural resins to synthesize pesticides such as pyrethroids and pharmaceutical phenobarbital; In the instrumentation industry, it is used to produce fixing paint and is used for sealing and fixing the cathode of electronic tubes. In the field of textile printing and dyeing, it is a good solvent for polyamide, polyacrylonitrile, bisphenol resin, etc. It can be used as a foaming agent in the synthetic fiber industry to improve the performance of fibers, improve the texture of fabrics, and improve wrinkle resistance. In terms of printing and dyeing, diethyl carbonate can enhance the printing and dyeing performance of hydrophobic synthetic fibers, make the dyeing distribution uniform, and improve the sun fading performance.