Method for distillative separation of mixtures containing tetrahydrofuran, γ-butyrolactone and/or 1,4-butanediol

US6846389B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Gerd Kaibel · Lampertheim, DE
• Alexander Weck · Freinsheim, DE
• Ralf-Thomas Rahn · Mannheim, DE

Key dates

• Filing date: May 3, 2001
• Grant date: Jan 25, 2005
• Expiry date: May 3, 2021

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S203/20
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

In a process for the continuous fractional distillation of mixtures comprising tetrahydrofuran, γ-butyrolactone and/or 1,4-butanediol to give at least three fractions, the fractionation is carried out in an assembly of distillation columns comprising at least one dividing wall column or at least one assembly of thermally coupled conventional distillation columns.