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Process for producing a hydrogen-rich gas stream from the effluent of a catalytic hydrocarbon conversion reaction zone

  • US 4,482,369 A
  • Filed: 05/10/1983
  • Issued: 11/13/1984
  • Est. Priority Date: 05/10/1983
  • Status: Expired due to Fees
First Claim
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1. A process to provide a purified hydrogen-rich gas stream and to maximize recovery of C3+ hydrocarbons from a catalytic hydrocarbon conversion reaction effluent containing hydrogen and hydrocarbons by treating said effluent from a catalytic hydrocarbon conversion reaction zone comprising the steps of:

  • (a) passing said catalytic hydrocarbon conversion reaction effluent containing hydrogen and hydrocarbons to a first vapor-liquid equilibrium zone, recovering therefrom a hydrogen-containing vapor phase and recycling a first portion thereof to said hydrocarbon conversion reaction zone;

    (b) drying at least a second portion of the hydrogen-containing vapor phase by removing water therefrom and thereafter cooling the dried portion by indirect heat exchange with a hereinafter defined hydrogen-rich gas stream;

    (c) passing the dried, cooled portion of the hydrogen-containing vapor phase to a second vapor-liquid equilibrium separation zone to produce a liquid stream comprising C3+ light hydrocarbons, which are recovered from said process, and a purified hydrogen-rich gas stream;

    (d) expanding at least a portion of said purified hydrogen-rich gas stream and thereafter subjecting it to indirect heat exchange with the dried portion of the hydrogen-containing vapor phase pursuant to step (b) above; and

    ,(e) recovering said heat exchanged purified hydrogen-rich gas stream.

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