Production of n-pentanal from low-butene feedstock mixtures

US9845276B2 · kind B2 · utility

Assignee

• EVONIK DEGUSSA GMBH · DE

Inventors

• Robert Franke · Marl, DE
• Lena Altmann · Recklinghausen, DE
• Corinna Hecht · Haltern am See, DE
• Benedikt Dercks · Bochum, DE
• Hanna Spohr · Moers, DE
• Horst-Werner Zanthoff · Neheim, DE

Key dates

• Filing date: Apr 19, 2017
• Grant date: Dec 19, 2017
• Expiry date: Apr 19, 2037

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C2523/62
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The invention is concerned with the issue of how to produce n-pentanal by hydroformylation from feedstock mixtures comprising a small proportion of n-butene and a large proportion of n-butane. Specifically, solutions for further optimizing established processes for hydroformylation of such low-butene mixtures in terms of material utilization are sought. The present invention has for its object to enhance the material utilization of the feedstock mixture in the production of n-pentanal from feedstock mixtures having a small proportion of n-butene and a large proportion of n-butane. The process shall be capable of economic operation on an industrial scale. In particular an existing oxo plant shall be honed to achieve better raw material utilization. This object is achieved by a combination of a hydroformylation and a dehydrogenation, wherein said combination has the special feature that the dehydrogenation is arranged after the hydroformylation in the downstream direction and is thus markedly smaller than conventional dehydrogenations provided upstream. A skillful product removal effectively removes contaminants formed in the process.