Chinese name: 1-ethyl-pyrrolidone N-ethylpyrrolidone

English name: 1-Ethyl-2-pyrrolidone

CAS No.: 2687-91-4

Molecular formula: C6H11NO

Structure:

Molecular weight: 113.16

Purity: ≥99.8%

N-ethylpyrrolidone (NEP) is a colorless, transparent liquid having a boiling point of 82-83 ° C (101.3 KPa), a relative density of 0.994 g/cm 3 and a refractive index of 1.4665 ( 22 ° C).

It is a strong polar organic solvent. It has chemical stability, weak alkalinity, superior solubility, low vapor pressure and low dielectric constant. Does not form hydrogen bonds, is a polar aprotic solvent,

It can replace other solvents with poor stability, high vapor pressure and high toxicity, and is called non-toxic super solvent.

Physical parameters:

Density: 0.992 g/mL (25 ° C) (lit.)

Boiling point: 97 ° C / 20 mmHg (lit.)

Flash point: 76 ° C

Refractive index (n20/D): 1.465 (lit.)

Quality specifications:

Purity: ≥99.8%

Water content: ≤0.1%

resolve resolution:

The method for synthesizing N-ethylpyrrolidone is a pyrrolidone method and a γ-butyrolactone method. The pyrrolidone method requires the halogenated anthracene to participate in the production of the corresponding halide due to the reaction, and the halogenate is also relatively ambiguous in the selection of the reactor.

In the γ-butyrolactone method, N-alkyl-2-pyrrolidone is obtained by condensation of a primary amine and γ-butyrolactone. The yield of the method is relatively high, but the process conditions are demanding.

use:

It can be used as a selective solvent, catalyst and cationic surfactant, and can also be used as a basic raw material to produce pharmaceutical intermediates.

It can be used to refine oil and produce gunpowder, medicine, dyes, pesticides, daily chemicals, paints and heat-resistant resins.