C - Chemistry – Metallurgy – 10 – G
Patent
C - Chemistry, Metallurgy
10
G
196/105
C10G 45/00 (2006.01) B01J 21/20 (2006.01) C10G 45/16 (2006.01)
Patent
CA 1050915
DEMETALLIZATION OF HIGH METALS FEEDSTOCKS USING REGENERATED CATALYST ABSTRACT The demetallization of petroleum feedstocks contain- ing a high percentage of metal impurities, particularly vanadium, by ebullated bed catalytic hydrogenation is improved through an initial pretreatment of particulate activated porous aluminum oxide catalyst in a reaction zone wherein vanadium and carbon are deposited on the catalyst. Following such pretreatment, the used catalyst is removed from the reaction zone at an appropriate rate, regenerated by burnoff of substantially all the carbon, and then returned to the reaction zone. This use of regenerated catalyst results in the average demetallization activity of the catalyst in the reactor being higher for vanadium removal than if the used catalyst were all replaced with fresh catalyst. While this invention may be used in a single stage ebullated bed reactor process, it is particularly useful as the first stage of a multiple state ebullated bed hydrogena- tion reaction process in which a high activity desulfurization catalyst is used in a subsequent reaction stage for sulfur removal.
229929
Rovesti William C.
Wolk Ronald H.
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