Process for concurrent selective hydrogenation of acetylenes...

Details Process for concurrent selective hydrogenation of acetylenes... Process for concurrent selective hydrogenation of acetylenes...

C - Chemistry, Metallurgy

07

C

C07C 7/10 (2006.01) B01D 3/00 (2006.01) B01D 3/34 (2006.01) C07C 7/163 (2006.01) C07C 7/167 (2006.01) C07C 17/38 (2006.01) C10G 7/00 (2006.01) C10G 45/10 (2006.01) C10G 45/32 (2006.01) C10G 45/40 (2006.01) C10G 70/02 (2006.01)

Patent

CA 2264137

A process for the removal of vinylacetylene, ethylacetylene and 1,2-butadiene from C4 aliphatic hydrocarbon streams comprising, concurrently: (1) feeding hydrogen and a hydrocarbon stream comprising C4 hydrocarbons including butanes, butenes, butadienes and vinylacetylene to a distillation column reactor containing a bed comprising a hydrogenation catalyst of the type characterized by platinum, palladium or rhodium which is prepared as a distillation structure to selectively hydrogenate a portion of the vinylacetylene and the 1,2- butadiene and (2) fractionally distilling the reaction mixture to remove a heavier fraction and removing a fraction overhead comprising substantially all of the C4.

L'invention concerne un procédé servant à évacuer le vinylacétylène, l'éthylacétylène et le 1,2-budatiène contenus dans des courants d'hydrocarbures aliphatiques C4, qui consiste à exécuter simultanément les étapes suivantes: (1) diriger de l'hydrogène et un courant d'hydrocarbures, qui contient des hydrocarbures C4 comprenant des butanes, des butènes, des butadiènes et du vinylacétylène, dans un réacteur à colonne de distillation, qui contient un lit comprenant un catalyseur d'hydrogénation du type caractérisé par platine, palladium ou rhodium et qui est préparé sous la forme de structure de distillation de façon à hydrogéner sélectivement une partie du vinylacétylène et du 1,2-butadiène et (2) distiller en fractions le mélange réactif afin d'évacuer une fraction plus lourde et évacuer un distillat de tête de fraction comprenant sensiblement tout le C4.

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