The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 12, 2003
Filed:
Mar. 20, 2001
Applicant:
Inventors:
Gerhard Theis, Maxdorf, DE;
Till Adrian, Bobenheim-Roxheim, DE;
Bernd Bessling, Grünstadt, DE;
Hans Hasse, Kaiserslautern, DE;
Frans Vansant, Kalmthout, BE;
Assignee:
BASF Aktiengesellschaft, Ludwigshafen, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D 3/38 ; B01D 3/42 ; C07C 2/980 ; C07C 3/120 ;
U.S. Cl.
CPC ...
B01D 3/38 ; B01D 3/42 ; C07C 2/980 ; C07C 3/120 ;
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vacuum dewatering and subsequent purifying distillation, wherein during the vacuum dewatering an aqueous stream is withdrawn which contains-monoethylene glycol in a concentration below 1% by weight, preferably below 0.1% by weight, medium boilers and low boilers. The withdrawn aqueous stream is, optionally after further workup, removed from the system.