Process for preparing dialkyl dicarbonates

US7420076B2 · kind B2 · utility

Assignee

• LANXESS Deutschland GmbH · DE

Inventors

• Thomas Prinz · Neunburg vorm Wald, DE
• Markus Eckert · Bad Mergentheim, DE
• Hans-Ulrich Buschhaus · Krefeld, DE
• Steffen Kahlert · Leichlingen, DE

Key dates

• Filing date: Apr 30, 2005
• Grant date: Sep 2, 2008
• Expiry date: Apr 30, 2025

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C68/02
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The novel process for preparing dialkyl dicarbonates by reacting the corresponding alkyl haloformates with alkali metal hydroxides, alkaline earth metal hydroxides and/or carbonates in the presence of water-immiscible organic solvents and in the presence of a catalyst is characterized in that the catalyst used is at least one tertiary alkylamine of the formula (I)NR1R2R3,  (I)where the substituents are each as defined in the description.