Process for the hydrogenative conversion of heavy oils and residual oils, used oils and waste oils, mixed with sewage sludge

A process for the hydrogenative conversion of a mixture of a raw oil and sewage sludge to liquid and gasous hydrocarbon products, comprising the step of:

• hydrogenating said mixture in the liquid phase or combined liquid and gas phases with a hydrogen-containing gas, said gas having a hydrogen partial pressure of 50-300 bar, at a temperature of 250.degree.-500.degree. C., with a gas/oil ratio of 100-10,000 m.sup.3 /t, wherein said hydrogenation is conducted in the presence of at least one additive selected from the group consisting of anthracite cokes, lignite cokes, carbon blacks, activated cokes, petroleum cokes, furnace dust, dusts from Winkler gasification of coal, red mud, iron oxides, electrostatic filter dusts and cyclone dusts, said additive being present in an amount from 0.5-5 wt. % based on the total amount of said mixture, and said additive comprising (1) two different particle size fractions, a fine particle size fraction having a particle size of 90 microns or less and a coarse particle size fraction having a particle size of 100-2,000 microns, or (2) a continuous particle size distribution having a particle size of 100-2,000 microns, wherein the hydrogenation is carried out with a weight ratio of raw oil to sewage sludge in the range of 10:1 to 1:1.5.