Multistage process for the preparation of oxo aldehydes and/or alcohols

US6482992B2 · kind B2 · utility

Assignee

• OXENO OLEFINCHEMIE GMBH · DE

Inventors

• Bernhard Scholz · Johannesweg, DE
• Franz Nierlich · Marl, DE
• Alfred Kaizik · Marl, DE
• Dieter Hess · Marl, DE
• Wilfried Bueschken · Haltern, DE
• Klaus-Diether Wiese · Haltern am See, DE
• Dirk Roettger · Recklinghausen, DE
• Guido Protzmann · Bensheim, DE

Key dates

• Filing date: Jul 16, 2001
• Grant date: Nov 19, 2002
• Expiry date: Jul 16, 2021

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C29/16
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Olefins are hydroformylated to give alcohols and/or aldehydes in a plurality of hydroformylation stages, each of which comprises:a) hydroformylating olefins having a carbon atom content of 6 to 24 carbon atoms in the presence of a cobalt- or rhodium catalyst in a reactor to the point of conversion of olefin reactant to product of 20 to 98%;b) removing the catalyst from the resulting liquid discharged from the reactor;c) separating the resulting liquid hydroformylation mixture into a low-boiler fraction comprising olefins and paraffins, and a bottoms fraction comprising aldehydes and/or alcohols; andd) reacting the olefins present in the low-boiler fraction in subsequent process stages comprising steps a, b and c and combining the bottoms fractions of process steps c) of all process stages.