Preparation of aldehydes

US5696297A · kind A · utility

Assignee

• BASF SE

Inventors

• Heinz-Josef Kneuper · Mannheim, DE
• Rocco Paciello · Bad Dürkheim, DE
• Michael Roper · Monsheim, DE

Key dates

• Filing date: Aug 2, 1995
• Grant date: Dec 9, 1997
• Expiry date: Aug 2, 2015

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C45/80
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Aldehydes or aldehydes and alcohols are prepared by hydroformylation of olefins of more than 3 carbon atoms by a process comprising the stage of hydroformylation by means of a rhodium catalyst homogeneously dissolved in the reaction medium, the separation of the rhodium catalyst from the discharge from the hydroformylation reaction and the recycling of the rhodium separated from the hydroformylation discharge to the hydroformylation stage, wherein the rhodium catalyst is extracted from the hydroformylation discharge into the aqueous phase by means of an aqueous solution of a water-soluble, phosphorus-containing complexing agent selected from the group consisting of the mono- or polysulfonated mono- and oligophosphines and/or from the group consisting of the mono- or polycarboxylated mono- or oligophosphines or the mono- or polysulfonated oligophosphites and the aldehyde or the aldehyde and the alcohol are isolated from the extracted hydroformylation discharge, the aqueous rhodium-containing extract is fed to a precarbonylation stage and is subjected to a precarbonylation in the precarbonylation stage in the presence of an essentially water-insoluble, organic liquid and in the prese…