N-Methylpyrrolidone (N-Methylpyrrolidone)

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N-Methylpyrrolidone

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N-methyl-pyrrolidin-2-one
2-Pyrrolidinone, 1-methyl-
n-methyl-2-pyrrolidinone
1-Methyl-2-pyrrolidinone
n-methyl-6-oxo-1,6-dihydropyridine-3-carboxamide
N-methyl-2-pyridone-5-carboxamide
1-methyl-2-oxo-pyrrolidine
1,6-Dihydro-N-methyl-6-oxonicotinamide
N-methyl-pyrrolidinone
1-methylpyrrolidin-2-one

+Expand -Stow

872-50-4

C5H9NO

99.131

2933990090

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Nature Description

N-Methylpyrrolidone is a five-membered cyclic amide and an organic polar solvent. N-Methylpyrrolidone is widely used in the production of adhesives, paints, fuels and medicines. Density 1.0±0.1g/m3
Boiling point 202.0±0.0°C at 760 mmHg
Melting Point-24°C(lit.)
Molecular formula C5H9NO
Molecular weight 99.131
Flash point 86.1±0.0°C
Accurate quality 99.068413
PSA 20.31000
LogP -0.40
Appearance: colorless or light yellow liquid with an amine smell
Vapour density 3.4 (vs air)
Vapor pressure 0.3±0.4 mmHg at 25°C
Refractive index 1.470

Product Applications

This product is an excellent advanced solvent, polar solvent with strong selectivity and good stability, high precision electronics, circuit board, lithium battery, etc. Cleaning agent: high-grade paint such as deoiling, degreasing, dewaxing, polishing, rust prevention, paint removing, etc, ink and pigment have the advantages of low toxicity, high boiling point, strong solubility, non-flammable, biodegradable, recyclable, safe use and applicable to various formula uses.

Production method

1. Derived from the reaction between γ-butyrolactone and methylamine. The first step of the reaction is to generate 4-hydroxy-N-methylbutanamide γ-butyrolactone and methylamine, and the second step is to further dehydrate to generate N-methylpyrrolidone. The two-step reaction can be continuously carried out in a tubular reactor. The molar ratio of γ-butyrolactone to methylamine is 1:1.15, the pressure is about 6MPa, and the temperature is 250℃. After the reaction is completed, the finished product is obtained by concentration and vacuum distillation. Yield: 90%. If the production of kettle-type reversing apparatus is adopted, the dosage of methylamine is 1.5-2.5 times of the theoretical amount, taking Laboratory preparation as an example. Add 2mol γ-butyrolactone and 4 moles of liquid methylamine into the 500ml autoclave, heat it tightly and keep it at 280℃ for 4 hours. After cooling, Excess methylamine was released, distilled, and the 201-202 °c fraction was collected. About 180g of product was obtained, and the yield was about 90%. Raw material consumption (kg/g)γ-butyrolactone 980 methylamine (40%)86 0 refining Method: Place N-methylpyrrolidone and benzene azeotropic distillation or molecular sieve for several days to remove water, then use a distillation column with a column height of 100cm and filled with glass spiral for vacuum distillation, and collect intermediate fraction. 2.γ-butyrolactone reacts with methylamine. After aftercooling of reaction, remove excess methylamine and water to concentrate the product, and then distilled under reduced pressure.

Security

Dangerous Goods Marking： Xi

Safety instructions： S41

Hazardous material category code： R36/38

Dangerous goods transportation number： UN12683/PG3

Symbols： GHS07,GHS08

Storage conditions： The package is complete, light and light, the warehouse is ventilated, away from open flame, high temperature, and stored separately from oxidant.

Cautionary Statement： P201;P280;P305+P351+P338;P308+P313

Signal word： Danger

Hazard Statement： H315;H319;H335;H360D