Hydrogenation process

Details Hydrogenation process Hydrogenation process

C - Chemistry, Metallurgy

07

C

260/628, 260/694

C07C 29/14 (2006.01) C07C 29/141 (2006.01) C07C 29/17 (2006.01) C07C 31/02 (2006.01) C07C 35/08 (2006.01)

Patent

CA 1305728

ABSTRACT A continuous process is described for hydrogenating an unsaturated organic compound to a corresponding hydrogenation product which process comprises: (a) providing a hydrogenation plant comprising first and second hydrogenation zones connected in series each containing a charge of a solid heterogeneous hydrogenation catalyst; (b) continuously supplying to an upper part of the first hydrogenation zone (i) a hydrogen-containing gas and (ii) a liquid phase containing the unsaturated organic compound dissolved in a compatible diluent therefor: (c) maintaining the first hydrogenation zone under temperature and pressure conditions conducive to hydrogenation; (d) allowing liquid phase to pass downwardly through the first hydrogenation zone; (e) continuously recovering an intermediate reaction product from a lower part of said first hydrogenation zone; (f) recovering a gaseous effluent from a lower part of the first hydrogenation zone; (g) supplying intermediate reaction product from step (e) in liquid form to an upper part of said second hydrogenation zone; (h) maintaining the second hydrogenation zone under temperature and pressure conditions conducive to hydrogenation; (i) allowing intermediate liquid reaction product to pass downwardly through said second hydrogenation zone; (j) supplying a hydrogen-containing feed gas to an upper part of the second hydrogenation zone; (k) recovering a gaseous effluent stream from a lower part of the second hydrogenation zone; (l) supplying material of the gaseous effluent stream of step (k) to form the hydrogen-containing gas of step (b); (m) recovering a liquid hydrogenation product containing stream from a lower part of the second hydrogenation zone; and (n) purging material of the gaseous effluent stream of step (f) from the hydrogenation plant.

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