In terms of solvent, as a solvent with high boiling point, high flash point, high thermal stability and chemical stability, it can be used for polyacrylonitrile spinning solvent, synthetic resin and natural resin, vinyl formate, vinyl pyridine and other copolymers and aromatic hydrocarbons The solvent of Chemicalbook carboxylic acid; in terms of catalyst, it can be used in the process of heating urea to produce cyanuric acid, the reaction of halogenated alkyl and metal cyanide to produce nitrile, the reaction of sodium acetylene and halogenated alkyl to produce alkyl alkyne, and the reaction of organic halide and cyanate to produce isocyanate.