1-Methyl-2-pyrrolidinone

N-methylpyrrolidone (NMP) is a polar aprotic transfer solvent. It has low toxicity, high boiling point and outstanding solubility. Strong selectivity and good stability. Widely used in aromatics extraction, acetylene, olefin, diolefin purification, polyvinylide solvent, lithium ion battery electrode auxiliary material, syngas desulfurization, lubricating oil refining, lubricating oil antifreeze agent, olefin extraction agent, insoluble engineering plastic polymerization solvent, agricultural herbicides, insulation materials, integrated circuit production, Semiconductor industry precision instruments, circuit board cleaning,PVC exhaust recycling, cleaning agents, dye additives, dispersants and so on. It is also used as a solvent and polymerization medium for polymers, such as engineering plastics and aramid fibers. In addition, it can also be used in pesticides, medicines and cleaning agents. The main uses of N-methylpyrrolidone in different grades are listed below:
1, industrial grade: lubricating oil refining, lubricating oil antifreeze, syngas desulfurization, electronic insulation materials, agricultural herbicides, pesticide additives, PVC exhaust recovery, high-grade paint, ink, pigment production of additives and dispersants. For example, it is used to extract aromatics in lubricating oil to achieve the purpose of refining lubricating oil; Because NMP has a large solubility to resin, as a solvent for resin processing can be specifically used in the manufacture of paint, floor paint, varnish, composite coating film, integrated circuit enamelled wire insulation materials, fiber fabrics and adhesives and other products.
2, ordinary grade: extraction and recovery of basic organic raw materials, such as acetylene concentration and butadiene, isoprene, aromatics and other extraction. It can be used as a solvent to recover acetylene from natural gas or light naphtha pyrolysis gas, and the purity of recovered and concentrated acetylene is 99.7%. As an extractant for separating and recovering high-purity butadiene from cracked C4 hydrocarbons, the recovery rate is 97%, the purity of recovered butadiene is 99.7%. As an extractant for recovering high-purity isoprene from cracked C5 hydrocarbons, the purity of isoprene is 99%; Because of its high solubility to aromatic hydrocarbons and low vapor pressure, the extraction agent loss rate is low and the recovery rate of aromatic hydrocarbons is high.
3, reagent level: integrated circuit, hard disk and other requirements for strict control of metal ions and particles of the industry of deoiling, degreasing, dewaxing, polishing, rust, paint, etc., such as photoresist removal liquid, IC semiconductor industry precision instruments, LCD liquid crystal materials, PCB printed circuit board, hard disk cleaning; And artificial kidney functional membrane liquid, seawater desalination membrane liquid and other solvents produced in the pharmaceutical industry.