Method for producing highly pure monoethylene glycol

US6514388B1 · kind B1 · utility

Assignee

• BASF SE

Inventors

• Till Adrian · Frankenthal (Pfalz), DE
• Bernd Bessling · Grünstadt, DE
• Hans Hasse · Kaiserslautern, DE
• Frans Vansant · Kalmthout, BE
• Gerhard Theis · Frankenthal (Pfalz), DE

Key dates

• Filing date: Jan 24, 2001
• Grant date: Feb 4, 2003
• Expiry date: Jan 24, 2021

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C29/80
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A process for the distillative recovery of high purity monoethylene glycol from the hydrolysis product of ethylene oxide by pressure dewatering, vacuum dewatering and subsequent purifying distillation, which includes the pressure dewatering columns or at least the first pressure dewatering column of the battery (2, 3, 4) having a stripping section with at least one separating stage, preferably with from 2 to 10 separating stages, particularly preferably with from 3 to 6 stages, and a portion of the overhead stream of the pressure dewatering column(s) (2, 3, 4) having a stripping section being removed from the system.