Recovery of aldehydes from hydroformylation reaction gas

US4479012A · kind A · utility

Assignee

• BASF SE

Inventors

• Karl Fischer · Burns Lake, CA
• Armin Volker Grenacher · Mutterstadt, DE
• Manfred Herr · Monsheim, DE
• Max Strohmeyer · Schifferstadt, DE

Key dates

• Filing date: Mar 30, 1982
• Grant date: Oct 23, 1984
• Expiry date: Mar 30, 2002

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S203/09
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Aldehydes are obtained from the gaseous product of the hydroformylation of olefinically unsaturated compounds using a rhodium catalyst by a process (cf. FIG. 2) in which PA1 (a) this gaseous product is introduced, without being cooled or depressured, into a distillation column D, PA1 (b) the top fraction from this column is cooled in a condenser K so that the greater part of the aldehydes contained therein is condensed, PA1 (c) the condensate is separated, in a separator A, into a gas phase and a liquid phase, PA1 (d) the gas phase from A, after waste gas has been separated off, is again brought to the hydroformylation pressure by means of a compressor P, and is returned to the reactor as a recycle gas, PA1 (e) the liquid phase from A is returned to D, and PA1 (f) the aldehydes are taken off from column D as liquid bottom products and/or as a vaporous side stream.