PROCESSES FOR REMOVING CONTAMINANTS FROM A DEHYDROGENATION EFFLUENT

摘要

A process for the providing a regenerant gas stream for a regenerable adsorbent used to remove water and hydrogen sulfide from a reactor effluent in a catalytic dehydrogenation process is described. The reactor effluent is compressed in a compressor to provide a compressed effluent. The compressed effluent may be treated to remove chlorides, and then passed to a dryer zone having a regenerable adsorbent. A regenerant gas stream is used to desorb the water and hydrogen sulfide and the spent regenerant stream may be passed to a cleaning zone having a sorbent configured to remove hydrogen sulfide from the spent regenerant stream. The cleaned regenerant gas stream may be recycled to the dryer zone to desorb and/or regenerate the regenerable adsorbent.

主权项

1. A process for producing a reusable regenerant gas stream, the process comprising:
compressing a reactor effluent from a catalyst dehydrogenation process to provide a compressed effluent; removing chlorides from the compressed effluent in a chloride removal zone to provide a treated effluent; removing water and hydrogen sulfide from the treated effluent in a dryer zone to provide a dryer output stream, the dryer zone having at least one vessel comprising a regenerable adsorbent; regenerating the regenerable adsorbent in the dryer zone with a regenerant gas stream to provide a spent regenerant gas stream, the spent regenerant stream including water and hydrogen sulfide; and, removing the hydrogen sulfide from the spent regenerant gas stream in a regenerant cleaning zone to provide a cleaned regenerant stream, the regenerant cleaning zone including one or more vessels having a sorbent configured to remove hydrogen sulfide from the spent regenerant gas stream.