Patent ID: 8021538

Claim:
A hydrocarbon conversion process comprising contacting a hydrocarbon oil with a particulate catalyst under conditions of elevated temperature above 600° F. and pressure above 500 p.s.i.g, and with hydrogen, said catalyst comprising at least one catalytically active metal from Group VIB of the periodic table, at least one catalytically active metal from Group VIII of the periodic table, and phosphorous, wherein: (1) said metals and phosphorous are carried on a foraminous carrier; (2) the pore mode is about 40 to about 90 Å; (3) the loss in weight on ignition at 1000° F. to 1200° F. of said catalyst is less than about 5 wt. % based on the weight of the catalyst; (4) the ASI ratio is greater than about 0.75 to about 2.0; and (5) said catalyst is prepared from a stabilized aqueous catalyst carrier impregnating composition comprising: (A) at least one substantially water insoluble Group VIII metal component; (B) at least one substantially water-soluble, phosphorous-containing acidic component in an amount insufficient to cause dissolution of said Group VIII metal component; and (C) at least one Group VIB metal component.