Process for separating off methanol from a mixture of dimethyl carbonate and methanol

US5455368A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Ingo Janisch · Gützkow, DE
• Heinz Landscheidt · Duisburg, DE
• Werner Struver · Leverkusen, DE
• Alexander Klausener · Neunburg vorm Wald, DE

Key dates

• Filing date: Dec 8, 1994
• Grant date: Oct 3, 1995
• Expiry date: Dec 8, 2014

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C68/08
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Methanol can be substantially removed from dimethyl carbonate (DMC)/methanol mixtures by absorption on ion exchange resins. The enriched DMC is obtained as filtrate. The absorption is carried out at from -50.degree. C. to +100.degree. C. and 0.1-10 bar.