Selective operating conditions for high conversion of...

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C - Chemistry, Metallurgy

10

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196/147

C10G 47/10 (2006.01) C10G 47/00 (2006.01) C10G 47/26 (2006.01)

Patent

CA 1187439

ABSTRACT A process for the catalytic hydroconversion of special petroleum feedstocks, containing 10-28 W % asphaltenes, and having Ramsbottom carbon residue of 12-35 W %, such as Cold Lake and Lloydminster crude and residue materials. In the process, high percentage conversion (65-80 V %) to lower boiling hydrocarbon products can be achieved by maintaining a narrow range of reaction conditions, preferably in an ebullated bed catalytic reactor. Reaction temperature is 780-835°F, hydrogen partial pressure is 2000-3000 psig, and space velocity is 0.25-5.0 Vf/hr/Vr. Higher conversion of about 80 to 95 volume percent can be obtained with recycle of 975°F+ vacuum bottoms fraction to the reactor. Useful catalysts have total pore volume of about 0.5-0.9 cc/gm and include cobalt-molybdenum and nickel-molybdenum on alumina support.

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