Process for separating water from organic multiple component mixtures by distillation

US4229261A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Gunter Heck · Wiesbaden, DE
• Gunter Roscher · Kelkheim, DE
• Rudolf Donth · Kelkheim, DE

Key dates

• Filing date: Dec 21, 1978
• Grant date: Oct 21, 1980
• Expiry date: Dec 21, 1998

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C67/54
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

Water is separated by distillation from organic multiple component mixtures containing at least one component partly miscible with water. The component miscible with water is distilled azeotropically with the water contained in the mixture, the distillate is separated into water and a zeotrope forming agent and the latter is recycled to the distilling column. In the recycling process, one part of the azeotrope forming agent is conducted to the top of the column and the other part is fed into the column at the feed mixture inlet or at a location thereunder.