Basic chemicals--butyrolactone

In the downstream applications of BDO industry chain products, γ-butyrolactone (GBL) is an important organic chemical raw material and fine chemical intermediate. It is widely used in petrochemicals, medicines, dyes, pesticides, fine chemicals and other fields. Commonly used in the manufacture of α-pyrrolidone, NMP, polyvinylpyrrolidone, α-acetyl-γ-butyrolactone, etc.

(1) N-methylpyrrolidone (NMP) is obtained by the condensation of γ-butyrolactone and methylamine. As an efficient and selective solvent, this product is mainly used to extract acetylene, butadiene, isoprene, and aromatic hydrocarbons in lubricating oil fractions to improve the quality of lubricating oil. It is especially used as an environmentally friendly non-toxic solvent and lithium The demand for battery electrolyte is extremely rapid; as a resin processing solvent, it is used to make a variety of vinyl coatings; as a polymerization reaction solvent, it is used to make polyimide heat-resistant resin, polyamide, polyphenylene ether, etc.; in addition, it can Synthesis of fine chemicals such as pharmaceuticals, pigments, spices and cleaning agents.

(2)@Cyclopylamine (CPA) is an important aliphatic amine containing a three-membered ring. It is mainly used in the synthesis of medicines, pesticides, and fine chemicals. It is especially used in large quantities in medicine. It is mainly used to synthesize ciprofloxacin and anthrafloxacin. , spafloxacin, ciprofloxacin, etc.

(3) 2-Pyrrolidone-5-carboxylic acid is obtained by using -carboxylic acid and γ-butyrolactone as the basic raw materials through esterification, amination, cyclization, and deamination by heating under reduced pressure. This product has three optical isomers and is mainly used in its ester and salt forms. It is widely used in daily chemicals, papermaking, leather, textiles, medicine and food and other fields. Currently, there is no domestic production equipment, so its application has been greatly affected. Big restrictions.