Patent ID: 8163963
Filing Date: 2012-04-24
Classification: C07C

Abstract:
1. A process for continuously hydrogenating unsaturated compounds, in which a) particles of a first hydrogenation catalyst are suspended in a liquid phase in which an unsaturated compound is dissolved, b) 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, c) the effluent from the bubble column reactor is sent to a gas-liquid separation, d) the liquid phase from step c) is sent to a crossfiltration to obtain a retentate and a filtrate, e) the retentate is recycled into step b), f) 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.