N Methyl 2 Pyrrolidone 616 45 5

Application: 2-pyrrolidone can be used as a solvent and organic synthesis intermediate to make nylon-4 and vinyl pyrrolidone, etc.; it can also be used as a solvent for synthetic resins, pesticides, polyols, inks, iodine, etc.; it can also be used as a plasticizer for acrylic and acrylic styrene resins, an extractant for aromatic compounds, and a decolorant for kerosene, rosin, and fatty acids. Preparation: Production of 2-pyrrolidone from hydrocyanic acid and acrylonitrile Hydrocyanic acid (HCN) reacts with acrylonitrile (AN) to produce 2-pyrrolidone. The reaction process is as follows: 1) HCN and AN react with triethylamine as a catalyst to produce succinonitrile. The reaction is carried out at normal pressure and a temperature of about 70°C, and the yield of succinonitrile is as high as 97%. 2) Succinonitrile is partially hydrogenated to aminobutyronitrile. The reaction uses a carrier nickel as a hydrogenation catalyst, a total pressure of 14.0MPa, a temperature of 80~100°C, and liquid ammonia as a solvent. The conversion rate of succinonitrile is close to 100%, and the selectivity of aminobutyronitrile is 85%. 3) γ-aminobutyronitrile undergoes hydrolysis and cyclization to generate 2-pyrrolidone. The reaction is carried out in a plug flow system at a temperature of 210°C. The nitrile conversion rate and product selectivity are both close to 100%.

Chemical properties: colorless crystals. Melting point 24.6°C, boiling point 245°C, relative density 1.116 (25/4°C), refractive index 1.4870. It is miscible with water, alcohol, ether, chloroform, benzene, ethyl acetate and carbon disulfide, and is difficult to dissolve in petroleum ether.

used as solvent and organic synthesis intermediate. Used to manufacture nylon-4 and vinyl pyrrolidone, etc. Uses: Organic synthesis intermediate, mainly used as a solvent for synthetic resins, pesticides, polyols, inks and iodine, and is also a raw material for the production of polyvinyl pyrrolidone, nylon-4 and Naofukang.

Production method: It is usually obtained by amination of γ-butyrolactone. Another method is to use maleic anhydride as a raw material, hydrogenated and amination, and the yield can reach 90%-92%.

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