Hydroformylation method for the large-scale production of aldehydes and/or alcohols

US11014863B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Stephan ZUEND · Hayward, US
• Rainer Papp · Speyer, DE
• Boris Breitscheidel · Fulda, DE
• Armin LANGE DE OLIVEIRA · Heidelberg, DE

Key dates

• Filing date: May 14, 2018
• Grant date: May 25, 2021
• Expiry date: May 27, 2038

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C31/12
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A process for preparing C4 to C13 monohydroxy compounds from a bottom fraction arising in the distillation of a crude mixture of C4 to C13 oxo-process aldehydes from cobalt-catalyzed or rhodium-catalyzed hydroformylation, or in the distillation of a crude mixture of C4 to C13 oxo-process alcohols, which comprises contacting the bottom fraction in the presence of hydrogen with a catalyst comprising copper oxide and aluminum oxide, at a temperature of 150° C. to 300° C. and a pressure of 20 bar to 300 bar and subjecting the resulting crude hydrogenation product to distillation, and the amount of C4 to C13 monohydroxy compounds present in the crude hydrogenation product after the hydrogenation being greater than the amount of C4 to C13 monohydroxy compounds given stoichiometrically from the hydrogenation of the ester and aldehyde compounds present in the bottom fraction, including the C4 to C13 monohydroxy compounds still present in the bottom fraction before the hydrogenation.