Selective operating conditions for high conversion of special pe

Mineral oils: processes and products – Chemical conversion of hydrocarbons – Cracking

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C10G 4710, C10G 4726

Patent

active

044275358

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 residua 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.degree.-835.degree. F., hydrogen partial pressure is 2000-3000 psig, and space velocity is 0.25-5.0 V.sub.f /hr/V.sub.r. Higher conversion of about 80 to 95 volume percent can be obtained with recycle of 975.degree. F..sup.+ 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.

REFERENCES:
patent: 3725247 (1973-04-01), Johnson et al.
patent: 3841981 (1974-10-01), Layng
patent: 3844933 (1974-10-01), Wolk et al.
patent: 3887455 (1975-06-01), Hamner et al.
patent: 3948756 (1976-04-01), Wolk et al.

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