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 product mixture, separating the product mixture in a separation sub-system such as compression train to obtain a C5-rich fraction comprising CPD and essentially depleted of hydrogen and C1-C4 hydrocarbons, dimerizing the C5-rich fraction in a dimerization reactor to obtain a product effluent comprising DCPD, followed by separating the product effluent 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 comprising: C5 components including CPD and acyclic diolefins; light components including hydrogen and C1-C4 hydrocarbons; one-ring aromatics; and multiple-ring aromatics; (III) separating the first rector hydrocarbon effluent to produce (i) a light components-rich fraction and (ii) a first C5-rich fraction comprising CPD; (IV) supplying at least a portion of the first C5-rich fraction into a second reactor operating under a first set of dimerization conditions; (V) obtaining a second reactor effluent from in the second reactor comprising CPD and DCPD; and (VI) separating at least a portion of the second reactor effluent to obtain a first DCPD-rich fraction comprising dicyclopentadiene (DCPD).