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:
Apr. 10, 2001
Filed:
Apr. 25, 1997
Carsten Gröning, Mannheim, DE;
Klaus Ebel, Lampertheim, DE;
Gerd Kaibel, Lampertheim, DE;
Jörg Therre, Worms, DE;
Jürgen Koopmann, Neustadt, DE;
Helmuth Menig, Friedelsheim, DE;
Gerhard Fritz, Dannstadt-Schauernheim, DE;
Rainer Dietz, Neustadt, DE;
BASF Aktiengesellschaft, Ludwigshafen, DE;
Abstract
In a process for the preparation of methylglyoxal dimethyl acetal from methylglyoxal and methanol in the presence of an acidic ion exchanger, water is introduced in an amount sufficient to form an acidic reaction mixture in which the acetal product and water form an azeotropic mixture, with or without the retention of some methanol reactant. After subjecting a single phase acidic reaction mixture to an azeotropic distillation, it will separate into two distinct liquid phases with a simple recovery of the acetal product from the aqueous phase.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile