Patent ID: 8157893

Claim:
An apparatus for isomerizing a hydrocarbon stream rich in a C 4 hydrocarbon and/or at least one of a C 5 and C 6 hydrocarbon, comprising: A) a vessel containing a fluid comprising a gas rich in hydrogen; B) a fluid transfer device receiving the fluid comprising a gas rich in hydrogen; C) at least one drier receiving the fluid comprising a gas rich in hydrogen from the fluid transfer device wherein the at least one drier operates at a first condition to dry the fluid comprising a gas rich in hydrogen and at a second condition during regeneration with a regenerant; and D) a reactor communicating with the at least one drier to receive the fluid comprising a gas rich in hydrogen wherein the at least one drier communicates with the vessel at least by sending the fluid comprising a gas rich in hydrogen or the regenerant through a fluid tapering device for at least one of regulating the flow and reducing the pressure of the regenerant to the vessel.