Method for the continuous production of aldehydes

US7615645B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Martin Volland · Heidelberg, DE
• Thomas Mackewitz · Mannheim, DE
• Wolfgang Ahlers · Worms, DE
• Ansgar Schäfer · Karlsruhe, DE
• Wolfgang Richter · Haar, DE
• Rocco Paciello · Bad Dürkheim, DE

Key dates

• Filing date: Oct 14, 2004
• Grant date: Nov 10, 2009
• Expiry date: Mar 18, 2026

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01J2531/822
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The invention relates to a method for the continuous production of aldehydes by the isomerising hydroformylation in a homogenous phase of olefin compositions by means of a synthesis gas, in the presence of a homogeneous rhodium catalyst that is complexed with an organophosphorus ligand containing oxygen atoms and/or nitrogen atoms and a free ligand. The production is carried out at high temperature and high pressure in a multi-stage reaction system consisting of at least two reaction zones. According to the method, the olefin composition is first reacted in a first reaction zone or a group of several first reaction zones at a total pressure of between 10 and 40 bar, using a synthesis gas with a CO/H2 molar ratio of between 4:1 and 1:2 until a 40 to 95% conversion of the α-olefins is obtained.