Patent · US Expired

Method for producing highly pure monoethylene glycol

US6605192B1 · kind B1 · utility

4Cited by

7References

20Claims

0Family size

Assignee

BASF SE

Inventors

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

Key dates

Filing date	Mar 20, 2001
Grant date	Aug 12, 2003
Priority date	—
Expiry date	Mar 20, 2021

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S203/20
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

A process for the distillative recovery of high purity monoethylene glycol from the hydrolysis, product of ethylene oxide by pressure dewatering, preferably in a battery, vacuum dewatering and subsequent purifying distillation, wherein during the vacuum dewatering an aqueous stream is withdrawn which contains-monoethylene glycol in a concentration below 1% by weight, preferably below 0.1% by weight, medium boilers and low boilers. The withdrawn aqueous stream is, optionally after further workup, removed from the system.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.