Selective hydrogenation of highly unsaturated compounds in hydrocarbon streams
AssigneeCatalytic Distillation Technologies
InventorsDennis Hearn, Robert P. Arganbright, Edward M. Jones, Jr., Lawrence A. Smith, Jr., Gary R. Gildert
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Abstract
A process for the selective hydrogenation of the diolefins and acetylenic compounds in a olefin rich aliphatic hydrocarbon streams is disclosed wherein the selective hydrogenation is carried out at 40 to 300° F. under low hydrogen partial pressure in the range of about 0.1 psi to less than 70 psia at 0 to 350 psig in a distillation column reactor containing a hydrogenation catalyst which serves as a component of a distillation structure, such as supported PdO encased in tubular wire mesh. Essentially no hydrogenation of the olefins occurs.
Claims78
A process for the selective hydrogenation of highly unsaturated compounds comprising the steps of:
- (a) feeding (1) a hydrocarbon stream containing highly unsaturated compounds which comprise diolefins and acetylenes and (2) a stream containing hydrogen to a distillation column reactor;
- (b) concurrently in said distillation column reactor at an effectuating hydrogen partial pressure hydrogen partial pressure in the range of at least about 0.1 psi to less than 70 psi:
- (i) contacting said streams in a distillation reaction zone with a hydrogenation catalyst prepared in a form to act as a distillation structure thereby to selectively hydrogenate a portion of said highly unsaturated compounds with said hydrogen to form less unsaturated hydrocarbons in a reaction mixture in a mixed vapor/liquid phase, and
- (ii) separating olefins produced by said selective hydrogenation from said reaction mixture by fractional distillation in said distillation structure while providing for condensing of a portion of said hydrocarbons comprising said olefins and highly unsaturated hydrocarbon compounds.
A process for the selective hydrogenation of highly unsaturated compounds comprising the steps of:
- (a) feeding (1) a hydrocarbon stream containing highly unsaturated compounds which comprise diolefins and (2) a stream containing hydrogen to a distillation column reactor;
- (b) concurrently in said distillation column reactor at an effectuating hydrogen partial pressure hydrogen partial pressure in the range of at least about 0.1 psi to less than 70 psi:
- (i) contacting said streams in a distillation reaction zone with a hydrogenation catalyst prepared in a form to act as a distillation structure thereby to selectively hydrogenate a portion of said highly unsaturated compounds with said hydrogen to form less unsaturated hydrocarbons in a reaction mixture in a mixed vapor/liquid phase, and
- (ii) separating olefins produced by said selective hydrogenation from said reaction mixture by fractional distillation in said distillation structure while providing for condensing of a portion of said hydrocarbons comprising said olefins and highly unsaturated hydrocarbon compounds.
A process for the selective hydrogenation of highly unsaturated compounds comprising the steps of:
- (a) feeding (1) a hydrocarbon stream containing highly unsaturated compounds which comprise acetylenes and (2) a stream containing hydrogen to a distillation column reactor;
- (b) concurrently in said distillation column reactor at an effectuating hydrogen partial pressure hydrogen partial pressure in the range of at least about 0.1 psi to less than 70 psi under distillation conditions wherein vapor phase and liquid phase are present:
- (i) contacting said streams in a distillation reaction zone with a hydrogenation catalyst prepared in a form to act as a distillation structure thereby to selectively hydrogenate a portion of said highly unsaturated compounds with said hydrogen to form less unsaturated hydrocarbons in a reaction mixture in a mixed vapor/liquid phase, and
- (ii) separating olefins produced by said selective hydrogenation from said reaction mixture by fractional distillation in said distillation structure while providing for condensing of a portion of said hydrocarbons comprising said olefins and highly unsaturated hydrocarbon compounds.
Dependencies are inferred from the claim text.