Recycling N-Methyl-2-pyrrolidone (NMP)

NMP is used to dissolve polymers for molecular weight analysis by GPC (Gel Permeation Chromatography).

Average molecular weight is an important property of polymers and is an indication of strength and flexibility.

After use, the waste NMP is contaminated with:

  • Polymer fragments
  • Monomers
  • Other solvents
N-Methyl-2-pyrrolidone Image
Name: N-Methyl-2-pyrrolidone
Formula: C5H9NO
Boiling Point: 202-206 °C

The 9600-90 is a good choice for recycling NMP waste. Key features are:

  • All glass and Teflon contact surfaces.
  • High efficiency distillation. Get back HPLC grade NMP
  • Completely automatic. Push start and walk away.
  • Safe! CE marked

Recycling Program: 9600-90 Spinning Band Distillation System

Cut #1 (waste) 140 - 198 °C
Cut #2 (Pure NMP) 198 - 206 °C
Reflux Ratio 5:1
Typical Distillation Rate 800 ml per hour
Typical Recovery 95% Recovered
Typical Purity HPLC Grade
Distillation System with Operator
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