公开(公告)号：EP0970163B1

公开(公告)日：2005-04-06

申请号：EP98911418.6

申请日：1998-02-26

Applicant: ExxonMobil Research and Engineering Company

Inventor： MCVICKER, Gary, B. ,  HO, Teh, C. ,  SOLED, Stuart, L. ,  DAAGE, Michel ,  KRYCAK, Roman ,  MISEO, Sabato ,  BUCHHOLZ, Viktor ,  LEWIS, William, E.

IPC: C10G45/02 ,  C10G45/04 ,  C10G65/04

CPC classification number: C10G45/04

Abstract: Hydrocarbon feeds are upgraded by contact of the stream under hydrodesulfurization (HDS) conditions with a catalyst system comprising a sulfided, transition metal promoted tungsten/molybdenum HDS catalyst, e.g., Ni/Co-Mo/A12O3 and a solid acid catalyst which is effective for the isomerization/disproportionation/transalkylation of alkyl substituted, condensed ring heterocyclic sulfur compounds present in the feedstream, e.g. zeolite or a heteropolyacid compound. Isomerization, disproportionation and transalkylation reactions convert refractory sulfur compounds such as 4- or 4,6-alkyl dibenzothiophenes into corresponding isomers or disproportionated isomers which can be more readily desulfurized by conventional HDS catalysts to H2S and other products. A hydrocarbon feed is first passed to a hydrotreating reactor (1). The effluent from the hydrotreating reactor (1) goes through a high-pressure gas-liquid separator (2) and is passed to a fractionator (3). The fractionator bottoms are passed to reactor (4) and effluent from reactor (4) is recycled to hydrotreater (1).