C - Chemistry – Metallurgy – 10 – G
Patent
C - Chemistry, Metallurgy
10
G
196/186
C10G 35/00 (2006.01) C10G 35/04 (2006.01) C10G 65/02 (2006.01)
Patent
CA 1130746
U.S. 923,191 & 923,192 ABSTRACT OF THE DISCLOSURE The ability of a catalyst to operate in a hydrogenolysis mode and effect sulfur release in a reforming process can be effectively suppressed after the freshly prepared catalyst has been regenerated, and reactivated several times, generally about five times or more, by the addition thereto of suf- ficient sulfur to maintain an equilibrium amount of sulfur on the catalyst, preferably a maximum of about 0.01 weight percent sulfur. If desired, water may be injected to displace excess sulfur from oversulfided catalyst. Preferably, the amount of sulfur added to a fresh catalyst is progressively, and preferably proportionately reduced from one regeneration, reactivation sequence to the next such that, on and after about the fifth regeneration, and reactivation of the catalyst a maximum of about 0.01 weight percent sulfur is added to the catalyst. The catalyst of the lead reactors of the series is preferably not directly sulfided, but indirectly sulfided by sulfur added to, and released by the tail reactor, or reactors.
331372
Dauber Louis
Swan George A.
Borden Ladner Gervais Llp
Exxon Research And Engineering Company
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