Separating basic asphaltenes using transition metal oxide...

Details Separating basic asphaltenes using transition metal oxide... Separating basic asphaltenes using transition metal oxide...

C - Chemistry, Metallurgy

10

G

196/232

C10G 25/00 (2006.01)

Patent

CA 1190171

ABSTRACT OF THE DISCLOSURE Basic asphaltenes are selectively removed from asphaltene-containing hydrocarbon feeds 10 by contacting the feed with a transition metal oxide solid acid catalyst which selectively adsorbs the basic asphal- tenes 12 to produce an asphaltene reduced feed 14. The catalyst will comprise a catalytic metal component select- ed from the group consisting essentially of oxides of (a) tungsten, niobium, and mixtures thereof and (b) mix- tures of (a) with tantalum, hafnium, chromium, titanium, zirconium and mixtures thereof, supported on an inorganic refractory oxide support such as alumina. Asphalt-laden catalyst is separated from the feed 16, the asphaltenes adsorbed thereon are cracked off 18 in the presence of steam 21 and the catalyst 22 is regenerated 24 and recycled 30 back to the adsorption zone 12.

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