The production of n-methylpyrrolidone (NMP) was produced by the use of the gamma - butylactone and methylamine. NMP is an excellent solvent, which can selectively separate aromatic hydrocarbon, and its extraction selectivity is good. No corrosion, chemical stability and thermal stability; It is widely used in petroleum chemical industry, extraction of acetylene, butadiene, aromatic hydrocarbon, natural gas desulfurization, high lubricating oil etc. N-methylpyrrolidone is also used as a solvent for resin polymerization and PVC recovery solvent, polyamide, polyamide varnish, etc. It is also a good industrial cleaning agent, used in the ultrasonic cleaning of precision machinery and optical instruments.
It is an important raw material for pharmaceutical industry, cosmetics and adhesives, which can produce n-vinyl pyrrolidone with ammonia and acetylene. N- vinyl pyrrolidone is polymerized into polyvinyl pyrrolidone (PVP) under the action of catalyst. PVP can be used in medicine, such as iodine and some drug compound. It can also be used in cultural products, such as solid glue; It can also be used in cosmetics, such as hair finishing agent, perfume agent, skin care agent, bath agent and cleaning agent. Used as adhesives in fabrics and dyes; It can improve the clarity of wine, vinegar, tea and fruit juice, stabilize the color and improve the fragrance.
It is used to treat hypertension and intracerebral hemorrhage. It can dissolve epoxy resin, polyacrylonitrile, PVC and copolymer and cellulose polymer. It can be used as a special solvent for electrolyte and pesticide intermediates of lithium batteries and capacitors.
Anyhow, gamma butyrolactone is high value product of a kind of fine chemical intermediates, can be used in producing alpha pyrrolidone, N - methyl - 2 - pyrrolidone, gamma - hydroxybutyric acid sodium, ring, acetyl gamma - butyl inner fat, agricultural chemicals and polymer solvent and dyes and dyeing with solvent, used in oil refining, acetylene purification, butadiene and aromatics extraction well, industrial cleaning agent, medicine, synthetic, etc, also used in dyes, pigment intermediates, electrolyte battery and capacitor coupling agent, control of aqueous sodium silicate gel preparation and potions to paint and other industries, GBL is a kind of important organic synthetic raw material and good solvent. It can also be used for oil extraction. It can also produce spices, pharmaceutical intermediates, rust remover and so on. The improvement of production process and technical route will bring better economic benefits.