Desulfurization process for refractory organosulfur heterocycles
 A process for the hydrodesulfurization (HDS) of multiple condensed ring heterocyclic organosulfur compounds present in petroleum and petrochemical streams over noble metal-containing catalysts under relatively mild conditions. The noble metal is selected from Pt, Pd, Ir, Rh, and polymetallics thereof. The catalyst system also contains a hydrogen sulfide sorbent material. 
Exxon Research and Engineering Co.
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inventional inventional
Michel Edward S. Jingguang G. David E.W. James J. Sylvain Darryl P. William C. Michele S. Gary B.
Daage Ellis Chen Vaughan Schorfheide Hantzer Klein Baird, Jr. Touvelle McVicker