Continuous process for the preparation of acetals

US6518464B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Jörg Therre · Worms, DE
• Gerd Kaibel · Lampertheim, DE
• Werner Aquila · Mannheim, DE
• Günter Wegner · Charlotte, US
• Hartwig Fuchs · Ludwigshafen, DE

Key dates

• Filing date: Sep 5, 2001
• Grant date: Feb 11, 2003
• Expiry date: Sep 5, 2021

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C41/58
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The present invention relates to a continuous process for the preparation of unsaturated acetals by reacting olefinically unsaturated aliphatic compounds with allyl alcohols in a reaction column, where the reactants are only partially reacted in the reaction column, the resulting acetal is concentrated in at least two successive evaporation stages, and the recovered reactants are returned to the reaction column.