Patent · US Expired

Preparation of methylglyoxal dimethyl acetal

US6214172A · kind A · utility

3Cited by

10References

5Claims

0Family size

Assignee

BASF SE

Inventors

Carsten Groning · Mannheim, DE
Klaus Ebel · Lampertheim, DE
Gerd Kaibel · Lampertheim, DE
Jörg Therre · Worms, DE
Jurgen Koopmann · Neustadt, DE
Helmuth Menig · Friedelsheim, DE
Gerhard Fritz · Schifferstadt, DE
Rainer Dietz · Langen, DE

Key dates

Filing date	Apr 25, 1997
Grant date	Apr 10, 2001
Priority date	—
Expiry date	Apr 25, 2017

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S203/13
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

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.

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