Two-stage hydrotreating process employing mercaptanization and hydrodesulfurization

摘要

A two-step process for treating a sulfur-containing refinery feedstock that includes olefin and diolefin constituents by reacting the feedstock with hydrogen sulfide over a catalyst to produce the corresponding mercaptans and/or thiophenes, which are then desulfurized in a second reactor containing hydrodesulfurization catalysts, thereby avoiding the need for prior selective hydrogenation of the olefin and diolefin constituents.