Method and device for carrying out the distillative separation of C5+ cuts

US7169267B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Gerd Kaibel · Lampertheim, DE
• Carsten Oost · Bad Dürkheim, DE
• Manfred Stroezel · Ilvesheim, DE
• Gerald Meyer · Ludwigshafen, DE
• Peter Trubenbach · Ludwigshafen, DE
• Karl-Heinz Sartor · Schwanau, DE
• Jurgen Heners · Halver, DE

Key dates

• Filing date: Sep 19, 2001
• Grant date: Jan 30, 2007
• Expiry date: Sep 14, 2022

Classification

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

Abstract

A process is proposed for the separation of C5+ cuts by distillation into a low-boiler (A), a medium-boiler (B) and a high-boiler fraction (C) in one or more dividing-wall columns (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 part (2, 4) with rectifying section (2) and stripping section (4), and a withdrawal part (3, 5) with rectifying section (5) and stripping section (3), with feed of the C5+ cut (A, B, C) into the central region of the feed part (2, 4), discharge of the high-boiler fraction (C) from the bottom of the column, discharge of the low-boiler fraction (A) via the top of the column, and discharge of the medium-boiler fraction (B) from the central region of the withdrawal part (3, 5), wherein the dividing ratio of the liquid reflux at the upper end of the dividing wall (T) is set in such a way that the proportion of high-boiling key components in the liquid reflux over the stripping section (3) of the withdrawal part at the upper end of the dividing wall (T) is from 10 to 80%, preferably from 30 to 50%, of the limit value allowed in…