Process for selective hydrogenation of a hydrocarbon cut containing at least three carbon atoms
First Claim
1. 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; and
recovering 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.
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Accused Products
Abstract
A process for the treatment of a feed comprising at least hydrocarbons containing at least 3 to 10 carbon atoms per molecule, including acetylenic and diolefinic hydrocarbons, comprises passing the feed into a distillation zone associated with a selective hydrogenation reaction zone comprising at least one catalytic hydrogenation bed which is internal to or external of the distillation zone, in which hydrogenation of at least a portion of the acetylenic and diolefinic hydrocarbons contained in the feed is carried out in the presence of a gas stream rich in hydrogen. The process is particularly suitable for the treatment of products from catalytic cracking.
49 Citations
21 Claims
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1. 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:
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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; and recovering 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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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Specification