Method and device for the distillative processing of 1,6-hexanediol, 1,5-pentanediol and caprolactone

US7329330B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Martin Gall · Kalamazoo, US
• Gerd Kaibel · Lampertheim, DE
• Thomas Krug · Worms, DE
• Harald Rust · Bochum, DE
• Frank Stein · Bad Dürkheim, DE

Key dates

• Filing date: Jan 8, 2002
• Grant date: Feb 12, 2008
• Expiry date: Dec 2, 2022

Classification

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

Abstract

A process for working up by distillation the crude products obtained in the process according to DE-A 196 07 954 and containing 1,6-hexanediol (HDO), 1,5-pentanediol (PDO) or caprolactone (CLO) in order to obtain the corresponding pure products, the working-up by distillation being carried out in each case in a dividing wall column (TK) in which a dividing wall (T) is arranged in the longitudinal direction of the column with formation of an upper common column region (1), a lower common column region (6), a feed section (2, 4) having a rectification section (2) and stripping section (4), and a take-off section (3, 5) having a stripping section (3) and rectification section (5), with feeding of the respective crude product HDO, PLO or CLO in the middle region of the feed section (2, 4) and removal of the high boiler fraction (C) from the bottom of the column, of the low boiler fraction (A) via the top of the column and of the medium boiler fraction (B) from the middle region of the take-off section (3, 5), or in thermally coupled columns.