Patent ID: 6072091
Filing Date: 2000-06-06
Classification: B01D,B01J,C07C,C10G,Y02P,Y10S

Abstract:
A process for selectively hydrogenating at least one of acetylenic and diolefinic hydrocarbons present in a feed comprising hydrocarbons of from 3-10 carbon atoms, said process comprising:at a feedpoint, passing said feed into a distillation zone including a rectifying zone, wherein liquid flows therein;drawing off at least one intermediate level of the rectifying zone at least one side stream representing a major portion of the liquid flowing in the rectification section zone at said level;sending said at least one side stream to at least one separate selective hydrogenation reaction zone comprising at least one catalytic bed being fed with a gas stream rich in hydrogen so as to produce a hydrogenated effluent, said at least one selective hydrogenation zone being at least partially internal to and in communication with the distillation zone;introducing at least a major portion of the hydrogenated effluent of said at least one selective hydrogenation reaction zone into the rectifying section of the distillation zone to ensure continuity of the distillation; andrecovering a distillate highly depleted in acetylenic and/or diolefinic hydrocarbons at the head of the distillation zone and, at the bottom of the distillation zone, a residue depleted in acetylenic and/or diolefinic hydrocarbons,with the provision that vapor in the distillation zone is maintained out of contact with all selective hydrogenation reaction zones.