Process for the selective hydrogenation and isomerization of hydrocarbons
First Claim
1. A process for the selective hydrogenation of diolefin hydrocarbons and simultaneous isomerization of mono-olefin hydrocarbons in a feed stream containing a mixture of hydrocarbons of varying depress of unsaturation including diolefins and having 4 or more carbon atoms, comprising contacting said mixture with hydrogen gas under hydrogenating and isomerizing conditions in the presence of a suitable catalyst in a multi-stage packed bed catalytic reactor which process comprises supplying said hydrogen gas to said reactor at a plurality of supply points spaced apart along the flow direction of said feed stream through said reactor, the molar ratio of hydrogen gas to unreacted diolefin at the first or starting supply point being sub-stoichiometric, and the molar ratio of hydrogen gas added to unreacted diolefin at a subsequent supply point being in excess of stoichiometric with respect to the unreacted diolefin at that point.
2 Assignments
0 Petitions
Accused Products
Abstract
A process for the selective hydrogenation and simultaneous isomerization of hydrocarbons in a feed stream (12) containing a mixture of hydrocarbons of varying degrees of unsaturation and having 4 or more carbon atoms. The process comprises contacting the mixture with hydrogen gas under hydrogenating and isomerizing conditions in the presence of a suitable catalyst (2, 3, and 4) in a multistage packed bed catalytic reactor (1). The process comprises supplying the hydrogen gas (20) in increasing molar ratio amounts relative to the remaining unreacted diolefin concentration in at least three points (24, 26 and 28) spaced apart along the flow direction of the feed stream through the reactor.
29 Citations
15 Claims
- 1. A process for the selective hydrogenation of diolefin hydrocarbons and simultaneous isomerization of mono-olefin hydrocarbons in a feed stream containing a mixture of hydrocarbons of varying depress of unsaturation including diolefins and having 4 or more carbon atoms, comprising contacting said mixture with hydrogen gas under hydrogenating and isomerizing conditions in the presence of a suitable catalyst in a multi-stage packed bed catalytic reactor which process comprises supplying said hydrogen gas to said reactor at a plurality of supply points spaced apart along the flow direction of said feed stream through said reactor, the molar ratio of hydrogen gas to unreacted diolefin at the first or starting supply point being sub-stoichiometric, and the molar ratio of hydrogen gas added to unreacted diolefin at a subsequent supply point being in excess of stoichiometric with respect to the unreacted diolefin at that point.
-
12. A process for the selective hydrogenation of diolefin hydrocarbons to mono-olefin hydrocarbons and simultaneous isomerization of mono-olefin hydrocarbons in a feed stream containing a mixture of butadiene and butenes comprising contacting said mixture with hydrogen gas under hydrogenating and isomerizing conditions in the presence of a catalyst composition comprising a Group VIII Noble metal on a carrier in a multi-stage packed bed catalytic reactor, which process comprises performing the hydrogenation and isomerization process in a liquid and/or vapor-liquid mixed phase by supplying said hydrogen gas to said reactor in at least three supply points spaced apart along the flow direction of said feed stream through said reactor in molar ratio amounts starting with sub-stoichiometric at the first supply point and increasing to stoichiometric and then to excess of stoichiometric relative to any unreacted butadiene content remaining in said feed stream at successive respective supply points.
- 14. A process for the selective hydrogenation of diolefin hydrocarbons and simultaneous isomerization of mono-olefin hydrocarbons in a feed stream containing a mixture of pentadiene and pentenes comprising contacting said mixture with hydrogen gas under hydrogenating and isomerizing conditions in the presence of a catalyst composition comprising a Group VIII Noble metal on a carrier in a multi-stage packed bed catalytic reactor, which process comprises performing the hydrogenation and isomerization process in a liquid and/or vapor-liquid mixed phase by supplying said hydrogen gas to said reactor in at least three supply points spaced apart along the flow direction of said feed stream through said reaction in molar ratio amounts starting with sub-stiochiometirc at the first supply point and increasing to stoichiometric and then to excess of stoichiometric relative to any unreacted pentadiene content remaining in said feed stream at successive respective supply points.
Specification