Double bond hydroisomerization process
OwnerRobert Gartside, Thomas Skourlis +2inventors
InventorsRobert Gartside, Thomas Skourlis, Robert Trubac, Hassan Kaleem
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Abstract
A process and apparatus are disclosed for hydroisomerizing a mixed C4 olefin stream in a fixed bed hydroisomerization reactor in order to increase the concentration of 2-butene and minimize the concentration of 1-butene, while concurrently minimizing the production of butanes. In one embodiment, carbon monoxide is introduced into the double bond hydroisomerization reactor along with hydrogen. In another embodiment, hydrogen, and optionally also carbon monoxide, are introduced at multiple locations along the length of the double bond hydroisomerization reactor. The invention is particularly useful in preparing C4 feed streams for metathesis reactions.
Claims32
A process for the double bond hydroisomerization of C4 olefins, comprising:
- obtaining a feed stream comprising 1-butene and 2-butene, introducing said feed stream and hydrogen to a reaction zone comprising a fixed bed reactor containing a hydroisomerization catalyst with double bond hydroisomerization activity in order to convert a portion of said 1-butene into 2-butene, forming an effluent stream, and
- introducing carbon monoxide to said reaction zone in an amount of 0.001 to 0.03 moles of carbon monoxide per mole of hydrogen in order to increase the selectivity to 2-butene.
A process for the double bond hydroisomerization of C4 olefins, comprising:
- obtaining a feed stream comprising 1-butene and 2-butene, and
- introducing said feed stream and hydrogen to a reaction zone comprising a fixed bed reactor having a length and containing a catalyst with double bond hydroisomerization activity in order to convert a portion of said 1-butene into 2-butene, forming an effluent stream, said hydrogen being introduced at multiple feed points along said length of said reaction zone in a quantity appropriate to maintain said catalyst in an active double bond hydroisomerization form while minimizing hydrogenation of butenes.
An apparatus for the double bond hydroisomerization of 1-butene to 2-butene, comprising:
- a C4 feed stream conduit,
- a fixed bed hydroisomerization reactor having an upstream end fluidly connected to said olefin feed stream conduit, a downstream end having an outlet, and a length, said fixed bed reactor containing a hydroisomerization catalyst,
- a first hydrogen inlet disposed on one of said C4 feed stream conduit and said upstream end of said hydroisomerization reactor, and
- a second hydrogen inlet disposed along said length of said reactor downstream from said first feed stream conduit, said first and second hydrogen inlets being positioned to maintain a hydrogen content in the reactor appropriate to maintain said hydroisomeriztion catalyst in an active double bond hydroisomerization form while minimizing hydrogenation of butenes.
Dependencies are inferred from the claim text.