Abstract: The invention relates to a new hydrocarbon hydroconversion catalyst, which is a mixture of an amorphous matrix, a zeolite and at least one metal of Group VIII and optionally of Group VI, the zeolite having a SiO.sub.2 /Al.sub.2 O.sub.3 molar ratio of about between 8 and 70, a sodium content of less than 0.15% by weight, a unit mesh parameter a.sub..degree. of between 24.55 and 24.24.times.10.sup.-10 m, a sodium ion recovery capacity C.sub.Na, expressed in grams of sodium per 100 grams of modified zeolite, greater than 0.85, a specific surface area greater than 400 m.sup.2 g.sup.-1, a water vapor adsorption capacity at 25.degree. C. (with a P/Po ratio of 0.10) greater than 6% by weight, a pore distribution between 1 and 20% of the pore volume contained essentially in pores of diameters between 20 and 80.times.10.sup.-10m, the remaining pore volume being contained essentially in pores of diameters less than 20.times.10.sup.-10 m, the matrix being characterized by the following textural properties:S.gtoreq.

Abstract: The invention concerns a process for manufacturing a catalyst containing a carrier formed in major part of alumina and an active phase, the alumina carrier being obtained by admixing an alumina binding agent with a charge of alumina base.The process is characterized in that at least a portion of the active phase or of its precursor is introduced during the manufacture of the carrier so as to be present in the binding agent or in the charge before or during the admixture of the charge with the binding agent.The resultant catalyst may be used in reactions of hydrocarbons and carbon monoxide hydrogenation.

Abstract: A process for hydrotreating hydrocarbons uses a catalyst which comprises a carrier and at least one catalytic metal selected from vanadium, molybdenum, tungsten, nickel, cobalt and/or iron; this catalyst is in the form of a plurality of juxtaposed agglomerates of acicular platelets, oriented radially to each other. It is prepared from agglomerates of activated alumina subjected to reaction with an acid and a compound providing an anion able to combine with aluminum ions in solution.

Abstract: The invention concerns the manufacture of a solid acid catalyst comprising: (a) a carrier, (b) a metal of the platinum family and (c) an additional metal selected from tin, germanium and lead. Halogen may be present.The additional metal is added to the catalytic mass dissolved in a hydrocarbon solvent, in the form of an organometallic compound, for example tetrabutyl tin.The invention is particularly applicable to the manufacture of catalysts for hydrocarbon reforming or aromatic hydrocarbons production.

Abstract: Process for the selective hydrogenation of the acetylenic hydrocarbons of a C.sub.4 hydrocarbons cut, containing butadiene and at least 1% by weight of acetylenic hydrocarbons, without substantial hydrogenation of butadiene, wherein said hydrocarbons cut in liquid phase and hydrogen are contacted with a supported catalyst containing 0.05 to 0.5% by weight of palladium and 0.05 to 1% by weight of silver, the Ag/Pd ratio by weight being at least 0.7.

Abstract: Alumina, silica or silica-alumina containing catalysts are manufactured by incorporating at least one active element selected from the metals of the groups V, VI and VIII or their compounds to a carrier, and then drying and activating. The carrier or the catalyst is shaped into extrudates and the latter are crushed to coarse particles.

Abstract: A catalyst for use in the hydrotreatment of hydrocarbons comprises a carrier and at least one catalytic metal selected from vanadium, molybdenum, tungsten, nickel, cobalt and/or iron; this catalyst is in the form of a plurality of juxtaposed agglomerates of acicular platelets, oriented radially to each other. It is prepared from agglomerates of activated alumina subjected to reaction with an acid and a compound providing an anion able to combine with aluminum ions in solution.

Abstract: New catalysts, useful for performing hydrocarbons conversions such as reforming, production of aromatics, isomerization of paraffinic and aromatic hydrocarbons, hydrocracking, hydrodealkylation and steam-dealkylation, are formed of a carrier such as alumina and active elements comprising a noble metal of the platinum family, titanium, at least one metal selected from manganese, technetium and rhenium, and halogen, said catalysts being advantageously used as a moving bed.

Abstract: Reforming process operated in the presence of a catalyst comprising a carrier, platinum, rhodium or osmium, an additional metal consisting of chromium, tungsten, molybdenum, manganese, rhenium, germanium, tin, gallium, indium, thallium, thorium, cerium, samarium, lanthanum, zinc, cadmium, titanium or zirconium, and halogen.

Abstract: Hydrorefining of a hydrocarbon charge of high metal content with a catalyst containing alumina, a metal from group VI and a metal from the iron group, of a specific surface from 120 to 200 m.sup.2 /g, a total pore volume from 0.8 to 1.2 cc/g and a pore distribution as follows:0 to 10% of pores smaller than 100 A35 to 60% of pores from 100 to 600 A35 to 55% of pores greater than 600 A,including 10 to 25% of pores greater than 10,000 A, said catalyst optionally containing additionally an alkaline-earth metal.

Abstract: Catalyst for producing hydrogen by reaction of carbon monoxide with water or for producing methanol by reaction of carbon monoxide with hydrogen, containing by weight 10-60% of copper oxide, 5-40% of zinc oxide, 1-20% of a rare earth metal oxide, 30-70% of aluminous cement and optionally 0.01-1% of a noble metal from group VIII.

Abstract: Process for reforming hydrocarbons or producing aromatic hydrocarbons under severe operating conditions, in the presence of a catalyst comprising an alumina carrier and, expressed by weight with respect to alumina:(a) from 0.05 to 0.6% of platinum(b) from 0.01 to 2% of rhenium(c) from 0.05 to 3% of thallium or indium, and(d) from 0.1 to 10% of a halogen.

Abstract: Catalytic hydroreforming process, particularly for the production of gasoline of high clear octane number, comprising hydrogenating a hydrocarbon charge in the presence of a catalyst containing an alumina carrier, a first metal selected from ruthenium, iridium and rhodium, a second metal, different from the first metal, and selected from ruthenium, palladium and osmium, a third metal consisting of indium, and a halogen.

Abstract: Process for reforming hydrocarbons or producing aromatic hydrocarbons under severe operating conditions, in the presence of a catalyst comprising an alumina carrier and, expressed by weight with respect to alumina:(a) from 0.05 to 0.6% of platinum(b) from 0.01 to 2% of rhenium(c) from 0.05 to 3% of thallium or indium, and(d) from 0.1 to 10% of a halogen.

Abstract: A process for hydrodealkylating alkyl-substituted aromatic hydrocarbons, e.g., toluene, by reaction with hydrogen in the absence of water vapor under relatively mild reaction conditions, and a catalyst therefor are disclosed. The process is effected at a temperature of from about 450.degree. and 650.degree. C., preferably from about 520.degree. to 620.degree. C., and pressures of from about 1 to about 30, preferably from about 5 to about 20 bar, and a liquid hourly space velocity of from about 1 to about 10, preferably from about 3 to about 8, in the presence of a catalyst which comprises a metal combination of rhodium and at least one metal selected from the group consisting of copper, nickel, cobalt, iron, and zinc, and a support comprising activated alumina having a specific surface of between about 100 and about 350 m.sup.2 /g and a total pore volume of from about 0.5 to about 0.8 cm.sup.3 /g.

Abstract: Catalyst for the conversion of carbon monoxide in the presence of water, to produce hydrogen, or in the presence of hydrogen, to produce methanol, said catalyst containing 10 - 60% by weight of copper oxide, 5 - 40% by weight of zinc oxide and 30 - 70% by weight of aluminous cement, the total content of copper oxide and zinc oxide being from 30 to 70% by weight.

Abstract: Hydrocarbons are dehydrocyclized to aromatics over a new catalyst comprising a carrier such for example as alumina, platinum, at least one metal selected from iridium, tungsten and ruthenium, cobalt, at least one metal selected from the group consisting of copper, manganese, silver and gold, and at least one halogen such for example as chlorine.

Abstract: New catalyst comprising a carrier such for example as alumina, platinum, at least one metal selected from iridium, tungsten and ruthenium, cobalt, at least one metal selected from the group consisting of copper, manganese, silver and gold, and at least one halogen such for example as chlorine.

Abstract: Catalyst for the decomposition of nitrogen oxides, particularly for use in catalytic exhaust boxes in view of decomposing the nitrogen oxides contained in the exhaust gases from internal combustion engines, comprising, deposited on a carrier, from 3 to 20% of an active phase of the formula Ni.sub.x (Fe.sub.y Cr.sub.z)O.sub.t, in which x has a value from 0.5 to 1.5, y + z a value from 1.5 to 3, the ratio ##EQU1## A VALUE FROM 0.01 TO 0.9 AND T A VALUE LOWER THAN 10.

Abstract: New catalyst containing a carrier, platinum, iridium, manganese and optionally halogen. This catalyst is useful for reforming and dehydrogenation of hydrocarbons.