Patent ID: 7410928
Filing Date: 2008-08-12
Classification: B01J,C10G

Abstract:
1. A catalyst composition suitable for the hydroconversion of heavy oils, which is prepared by: (a) mixing a molybdenum oxide and aqueous ammonia to form a molybdenum aqueous mixture; (b) sulfiding, in a first reaction zone, the aqueous mixture of step (a) with a gas comprising hydrogen sulfide to a dosage greater than 8 SCF of hydrogen sulfide per pound of molybdenum to form a slurry; (c) promoting the slurry with a Group VIII metal compound; (d) mixing the slurry of step (c) with a first hydrocarbon oil having a viscosity of at least 2 cSt @ 212° F. but less than about 12 cSt@ 212° F. at a speed with range from 100 to 1600 RPM to form and maintain a homogenous slurry designated as Mixture X; (e) combining Mixture X with hydrogen gas and a second hydrocarbon oil in a second reaction zone, the second hydrocarbon oil having a boiling point in the range from 50° F. to 300° F. and having a lower viscosity that the first hydrocarbon oil and mixing at a speed in the range from 100 to 1600 RPM in order to maintain a homogenous slurry, thereby forming an active catalyst composition admixed with a gaseous hydrocarbon; and (f) recovering the active catalyst composition by separation from the gaseous hydrocarbon of step (e).