Hydrocracking with phosphomolybdic acid and phosphoric acid

Claim 1

A process for hydroconverting a heavy hydrocarbonaceous oil chargestock comprising a catalyst to produce lower boiling hydrocarbon products, which comprises reacting said chargestock with hydrogen at hydroconversion conditions, including a temperature ranging from about 800 to about 900° F., said catalyst having been prepared by the steps which comprise: (a) adding phosphoric acid to an aqueous solution of phosphomolybdic acid in an amount to provide in said solution an atomic ratio of phosphorus to molybdenum ranging from 0.12:1 to 0.45:1; and, subsequently (b) forming a mixture of a hydrocarbonaceous material having a different boiling point range from said chargestock and the aqueous solution resulting from step (a), in an amount to provide in said mixture from about 0.2 to 2 weight percent molybdenum, calculated as elemental metal, based on said hydrocarbonaceous material to produce a catalyst precursor concentrate; (c) introducing at least a portion of said catalyst precursor concentrate into said chargestock; and (d) heating the mixture resulting from step (b), or the mixture resulting from step (c) in the presence of a gas selected from the group consisting of a hydrogen-containing gas, a hydrogen sulfide-containing gas and mixtures thereof at conditions to convert said phosphomolybdic acid and said phosphoric acid to a solid molybdenum and phosphorus-containing catalyst.