Process and System for Making Cyclopentadiene and/or Dicyclopentadiene

摘要

Processes and systems for making cyclopentadiene and/or dicyclopentadiene include converting acyclic C5 hydrocarbon(s) into CPD in a first reactor to obtain a first reactor hydrocarbon effluent, which is processed in an eductor to obtain an eductor effluent at higher total pressure than atmospheric pressure, separating the eductor effluent in a separator such as compression train to obtain a C5-rich fraction comprising CPD, dimerizing the C5-rich fraction in a second reactor to obtain a product effluent comprising DCPD, which is separated to obtain a DCPD-rich fraction. Multiple-stage of dimerization and separation steps can be optionally used to obtain multiple DCPD-rich fractions of various degrees of purity and quantity. C5-rich fractions from various stages of the process may be recycled to the first reactor, or converted into mogas components after selective hydrogenation. C5-rich fractions and mogas components may be optionally separated to produce value-adding chemicals.

主权项

1. A process for making cyclopentadiene (CPD) and/or dicyclopentadiene (DCPD), the process comprising:
(I) feeding a C5 feedstock comprising at least one acyclic C5 hydrocarbon into a first reactor; (II) contacting the at least one acyclic C5 hydrocarbon with a catalyst under conversion conditions to obtain a first reactor hydrocarbon effluent from an outlet of the first reactor comprising: C5 components including CPD and acyclic diolefins; light components including hydrogen and C1-C4 hydrocarbons; one-ring aromatics; and multiple-ring aromatics; (III) feeding at least a portion of the first reactor hydrocarbon effluent to a suction chamber of an eductor; (IV) injecting a stream of a motive fluid through a nozzle into the suction chamber; (V) obtaining an eductor effluent from an exit of the eductor comprising the motive fluid and CPD; wherein: the overall pressure of the first reactor effluent at the outlet of the first reactor is lower than the overall pressure of the eductor effluent at the exit of the eductor; and the temperature of the first reactor effluent at the outlet of the first reactor is higher than the temperature of the eductor effluent at the exit of the eductor.