Abstract:
A process is described for improving the fuel quality of hydrocarbon blends hydrotreated, and possibly dearomatized, by reaction with hydrogen, at a temperature ranging from 250 to 35O°C, at a pressure higher than or equal to 50 bar and a WHSV preferably ranging from 1 to 3 hours -1 , in the presence of a new catalytic composition comprising: a) a metallic component selected from: - iridium, in a quantity greater than or equal to 2% by weight with respect to the total weight of the catalytic composition, - a mixture of iridium and one or more metals Me selected from Pt, Pd, Ru, Rh, and Re, wherein said mixture is in a quantity greater than or equal to 2% by weight with respect to the total weight of the catalytic composition and is characterized by an Ir/Me weight ratio ranging from 2 to 10; b) an acid component containing a completely amorphous micro-mesoporous silico-alumina having an SiO 2 /AL 2 O 3 molar ratio ranging from 50 to 500, a surface area greater than 500 m 2 /g, a pore volume ranging from 0.3 to 1.3 ml/g, an average pore diameter less than 40 Å. The process of the invention leads to an increase in the cetane index, a decrease in the density and T 95 .
Abstract:
A process is described for improving the quality as a fuel of hydrotreated hydrocarbon blends by reaction with hydrogen in the presence of a bifunctional catalytic system comprising one or more metals selected from Pt, Pd, Ir, Ru, Rh and Re, and a silico-aluminate of an acidic nature, se- lected from a micro-mesoporous silico-alumina and a zeolite belonging to the MTW family. The process of the invention produces an increase in the cetane index and a decrease in the density and T95.
Abstract:
Process for the contemporaneous production of fuels and lubricating bases from synthetic paraffinic mixtures, which includes a hydrocracking step in the presence of a solid bi-functional catalyst comprising: (A) a support of an acidic nature consisting of a catalytically active porous solid, including silicon, aluminum, phosphorus and oxygen bonded to one another in such a way as to form a mixed amorphous solid characterized by an Si/Al atomic ratio of between 15 and 250, a P/Al ratio of at least 0.1, but lower than 5, a total pore volume ranging from 0.5 to 2.0 ml/g, with an average pore diameter ranging from 3 nm. to 40 nm, and a specific surface area ranging from 200 to 1000 M2/g; (B) at least one metal with a hydro-dehydrogenating activity selected from groups 6 to 10 of the periodic table of elements, dispersed on said support (A) in an amount of between 0.05 and 5% by weight with respect to the total weight of the catalyst.
Abstract:
A process is described for the upgrading of distil lates having a boiling point ranging from 100 to 450°C, which comprises the opening of the ring of the naphthene compounds contained in these distillates to obtain paraffinic compounds, rich in branched paraffins, having for the most part the same number of carbon atoms as the starting naphthene. The process is carried out in the presence of a bifunctional catalytic system comprising one or more metals selected from Pt, Pd, Ir, Ru, Rh and Re, and a silicoaluminate of an acidic nature, selected from a micromesoporous silico-alumina and a zeolite belonging to the MTW group.
Abstract:
A process with an increased efficiency for the preparation of middle distillates with excellent properties at low temperatures and substantially without oxygenated organic compounds, starting from a synthetic mixture of hydrocarbons at least partly waxy, containing a fraction of alcohols, comprising the separation of the mixture into a low-boiling fraction and a high-boiling fraction; the subsequent hydrogenation of the low-boiling fraction under such conditions as to avoid any substantial variation in its average molecular weight; the joining of at least a part of the hydrogenated fraction with said high-boiling fraction, and the subsequent catalytic hydrocracking treatment of the mixture of hydrocarbons thug formed, to obtain a substantial conversion of the waxy part into middle distillate.
Abstract:
A solid catalyst for hydrotreating processes of hydrocarbons, comprising: (A) a support of an acidic nature consisting of a catalytically active porous solid, including silicon, aluminum, phosphorus and oxygen bonded to one another in such a way as to form a mixed amorphous solid characterized by an Si/Al atomic ratio of between 15 and 250, a P/Al ratio of at least 0.1, but lower than 5, a total pore volume ranging from 0.5 to 2.0 ml/g, with an average pore diameter ranging from 3 nm to 40 nm, and a specific surface area ranging from 200 to 1000 M /g; (B) at least one metal with a hydro-dehydrogenating activity selected from groups 6 to 10 of the periodic table of elements, dispersed on said support (A) in an amount of be tween 0.05 and 5% by weight with respect to the total weight of the catalyst. Said catalyst is advantageously used in hydrocracking processes of hydrocarbon mixtures, for obtaining fuels and lubricating bases.
Abstract:
A solid catalyst for hydrotreating processes of hydrocarbons, comprising: (A) a support of an acidic nature consisting of a catalytically active porous solid, including silicon, aluminum, phosphorus and oxygen bonded to one another in such a way as to form a mixed amorphous solid characterized by an Si/Al atomic ratio of between 15 and 250, a P/Al ratio of at least 0.1, but lower than 5, a total pore volume ranging from 0.5 to 2.0 ml/g, with an average pore diameter ranging from 3 nm to 40 nm, and a specific surface area ranging from 200 to 1000 M 2 /g; (B) at least one metal with a hydro-dehydrogenating activity selected from groups 6 to 10 of the periodic table of elements, dispersed on said support (A) in an amount of be tween 0.05 and 5% by weight with respect to the total weight of the catalyst. Said catalyst is advantageously used in hydrocracking processes of hydrocarbon mixtures, for obtaining fuels and lubricating bases.
Abstract:
Amorphous porous solid of an acidic nature, with a controlled pore size, essentially consisting of a mixed oxide of silicon, aluminum and phosphorous, having a surface area of at least 200 m 2 /g, which can be used as a catalyst or active carrier of a catalyst for various industrial processes, such as, for example, alkylation, isomerization, hydro-dehydrogenation processes, with an improved activity and selectivity with respect to the traditional amorphous silica-alumina gels.