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:
Sep. 18, 2018
Filed:
Jul. 26, 2016
Basf SE, Ludwigshafen am Rhein, DE;
Alexander Duefert, Ludwigshafen, DE;
Rolf Pinkos, Bad Duerkheim, DE;
Michael Reiser, Kaiserslautern, DE;
Philipp Brüggemann, Erlangen, DE;
Gerhard Theis, Maxdorf, DE;
BASF SE, , DE;
Abstract
Process for preparing monoethylene glycol (MEG) by metal-catalyzed reaction of a dialkyl oxalate of the formula I where Rand Rare each, independently of one another, methyl, ethyl, n-propyl or isopropyl, with hydrogen (H), wherein the dialkyl oxalate (I) is used as melt or as a solution in a solvent, dialkyl oxalate (I) and Hare used in a molar ratio of H:dialkyl oxalate (I) in the range from 4.0 to 30 and the reaction is carried out continuously in a reactor at a cross-sectional loading of ≥10 m/s, a temperature in the range from 150 to 270° C., a pressure in the range from 150 to 390 bar and in the presence of a chromium-free heterogeneous catalyst comprising copper.