Process for continuous hydrogenation or hydrogenating amination

US8557985B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Bram Willem Hoffer · Heidelberg, DE
• Hartwig Voβ · Bischofswerda, DE
• Ekkehard Schwab · Neustadt, DE
• Udo Rheude · Otterstadt, DE
• Gerd Kaibel · Lampertheim, DE
• Mathias Haake · Mannheim, DE
• Jan Eberhardt · Mannheim, DE
• Michael Karcher · Dossenheim, DE

Key dates

• Filing date: Mar 19, 2012
• Grant date: Oct 15, 2013
• Expiry date: Mar 19, 2032

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C47/228
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A process continuously hydrogenating unsaturated compounds, in which particles of a first hydrogenation catalyst are suspended in a liquid phase in which an unsaturated compound is dissolved, the liquid phase, in the presence of a hydrogenous gas at a first partial hydrogen pressure and at a first temperature, is conducted through a packed bubble column reactor in cocurrent counter to the direction of gravity, the effluent from the bubble column reactor is sent to a gas-liquid separation, the liquid phase is sent to a crossfiltration to obtain a retentate and a filtrate, the retentate is recycled into the bubble column reactor and the filtrate, in the presence of a hydrogenous gas at a second partial hydrogen pressure and at a second temperature, is passed over a bed of a second hydrogenation catalyst, the second partial hydrogen pressure is at least 10 bar higher than the first partial hydrogen pressure.