Processes for the manufacture of acetals

US7534922B2 · kind B2 · utility

Assignee

• Ticona LLC · US

Inventors

• Matthias Göring · Hofheim, DE
• Michael Hoffmockel · Niedernhausen, DE
• Jurgen Lingnau · Mainz, DE
• Karl-Friedrich Muck · Wiesbaden, DE

Key dates

• Filing date: Dec 13, 2005
• Grant date: May 19, 2009
• Expiry date: Dec 13, 2025

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P20/10
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A process for preparing acetals from aldehydes and alcohols is carried out by generating a reaction/distillation zone charged with an acidic fixed bed catalyst in a distillation column, feeding the aldehyde and the alcohol to the reaction/distillatlon zone and at least partly converting them to the acetal, heating the column bottom disposed below the reaction/distillation zone in order to at least partly evaporate the bottom's mixture and to establish a defined temperature in the reaction/distillation zone, feeding an extractant into a rectifying section of the column, disposed above the reaction/distillation zone and condensing a product having more than 90% by weight of acetal at the top of the column.