COMPOUND BED DESIGN WITH ADDITIONAL REGENERATION STEPS FOR REMOVAL OF VARIOUS SULFUR SPECIES FROM LIGHTER HYDROCARBON STREAMS CONTAINING TRACE LEVELS OF OLEFINS

摘要

A process is provided to remove impurities including water, mercaptans, carbonyl sulfide and hydrogen sulfide from hydrocarbon streams containing from 100 to 900 ppm light olefins. In the process, a compound bed containing multiple layers of molecular sieves is used to remove the specific impurities. In situations when the regeneration gas may contain sulfur compounds, a sulfur guard bed may be used to treat the regeneration gas prior to regenerating the compound adsorbent bed.