Manufacture of predominantly straight-chain aldehydes

US3941848A · kind A · utility

Assignee

• Badische Anilin- & Soda-Fabrik Aktiengesellschaft

Inventors

• Rudolf Kummer · Bischofswerda, DE
• Hans Juergen Nienburg
• Heinz Hohenschutz · Mannheim, DE
• Max Strohmeyer · Schifferstadt, DE
• Theo Teutsch

Key dates

• Filing date: Jul 24, 1973
• Grant date: Mar 2, 1976
• Expiry date: Jul 24, 1993

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C45/50
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

An improvement in the process for the manufacture of predominantly straight-chain aldehydes by hydroformylation of olefinically unsaturated compounds of 2 to 20 carbon atoms with carbon monoxide and hydrogen in which, in a first stage, aqueous cobalt solutions are treated with carbon monoxide and hydrogen at temperatures of 50.degree. to 200.degree.C and pressures of 100 to 400 atmospheres in the presence of active charcoal, zeolites or basic ion exchangers which are charged with cobalt carbonyl, in a second stage cobalt carbonyl-hydride is extracted from the reaction mixtures thus obtained, at temperatures of 20.degree. to 180.degree.C and pressures of 1 to 400 atmospheres, by means of olefinically unsaturated compounds which must be water-insoluble and liquid under the conditions used, the aqueous phase is separated off and the organic phase is transferred to a third stage and in this stage, after introducing olefinically unsaturated compounds if the latter have only been used partially for the extraction, the hydroformylation is carried out at temperatures of 70.degree. to 170.degree.C and pressures of 100 to 400 atmospheres, the improvement being that the extraction in the seco…