Abstract: Aromatic hydrocarbons are hydrogenated in the presence of a catalyst obtained by admixing an aluminous carrier with a group VIII noble metal compound and a reducing agent of the formula Al X.sub.y R.sub.3-y where y is 1, 3/2 or 2, X is halogen and R is a monovalent hydrocarbon radical.

Abstract: A process is provided for the conversion of solid-containing liquid hydrocarbon oils, and in particular for the hydrogenation of solid-containing liquid hydrocarbon oils derived from coal, oil shale and tar sands. The process comprises passing a solid-containing liquid hydrocarbon oil, together with hydrogen, through a reaction vessel that contains a plurality of reaction zones separated by porous partitions. A portion of said zones is adapted to contain a solid particulate hydrogenation catalyst which will not pass through said porous partitions. The remainder of said zones form substantially unobstructed passageways through said reaction vessel. The volumetric ratio of catalyst zones to substantially unobstructed passageways is about 10:1 to about 1:10.

Abstract: The method of preparing cycloolefines consists in that, according to the invention, the corresponding cyclodienes are hydrogenated with hydrogen in the presence of a catalyst which is an alloy of palladium with ruthenium or rhodium, the ruthenium content of the alloy being from 1 to 11 per cent (preferably 10 per cent) by weight, and the rhodium content being from 1 to 5 per cent (preferably 2 per cent) by weight, respectively. The hydrogenation is carried out at temperatures from room temperature to 220.degree.C, at a pressure from 1 to 1.5 atm.

Abstract: Hydrocarbon fractions boiling between 180.degree. and 600.degree.F. and containing aromatics, olefins, and sulfur and nitrogen compounds are hydrogenated with a platinum-palladium catalyst to reduce the concentration of aromatics and olefins. The catalyst is prepared by saturating a porous inert carrier, preferably alumina, with an aqueous acid solution of chloroplatinic acid and palladium (ous) chloride in a specified mole ratio of platinum to palladium. The saturated carrier is subsequently dried, calcined and reduced.