Process for hydrotreating heavy hydrocarbon oil

Details Process for hydrotreating heavy hydrocarbon oil Process for hydrotreating heavy hydrocarbon oil

C - Chemistry, Metallurgy

10

G

196/132

C10G 45/02 (2006.01) C10G 45/04 (2006.01) C10G 67/04 (2006.01)

Patent

CA 1126192

ABSTRACT OF THE DISCLOSURE The disclosure describes a process for hydrotreating heavy hydrocarbon oil containing asphaltene and heavy metals in order to continuously convert it into a substantially asphalt- ene- and heavy metal-free oil in the recycling system. The pro- cess comprises (a) hydrotreating reactor feed oil in the presence of a catalyst comprising a carrier containing magnesium silicate as a major component and having supported thereon one or more catalytic metal components selected from the metals of Groups Va, VIa, and VIII of the periodic table. The hydrogen/oil ratio is 100 - 2000 (normal litre/litre), the temperature is 350 - 450°C, the pressure is 30 - 250 kg/cm2G, and the liquid hourly space velocity is 0.1 - 10 Hr-1. The reactor feed oil is fresh raw heavy hydrocarbon oil and/or oil recycled from the last step (c), as later described, of the recycling system. The hydro- treated product is withdrawn without entraining therein the catalyst. The withdrawn hydrotreated product is (b) separated into a hydrogen-rich gas and a liquid product; (c) the liquid product of step (b) as such or a mixture of said liquid product with fresh raw heavy hydrocarbon oil which was fed directly to this step as the case may be, is separated into a substantially asphaltene- and heavy metal-free light fraction and an asphalt- ene- and heavy metal-containing heavy fraction. Finally, (d) the heavy fraction separated in step (c) is recycled to step (a), while making sure that the reactor feed oil to be hydrotreated in step (a) contains at least 5% by weight of asphaltene and 80 ppm or more of vanadium.

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