摘要:
A process is disclosed for oligomerizing light olefins or mixtures thereof, which consists in reacting said olefins, possibly diluted with an inert gas, by means of synthetic zeolites containing oxides of silicon, titanium and iron, having, in their calcined and anhydrous state, the following empirical formula:pHFeO.sub.2. qTiO.sub.2.SiO.sub.2,wherein p has a value larger than zero and smaller than, or equal to, 0.050 and g has a value larger than zero and smaller than, or equal to 0.025, and the H.sup.+ of HFeO.sub.2 can be at least partially substitutable or substituted with cations.
摘要:
The present invention relates to a process for the oligomerization of light olefins or mixtures thereof, wherein a reaction is brought about between olefins with a carbon number of between 2 and 20 and synthetic zeolites containing silicon, titanium and gallium oxides which in the calcined, anyhdrous state have the following empirical formula:pHGaO.sub.2 .multidot.qZTiO.sub.2 .multidot.SiO.sub.2,where p is of a value greater than zero and less than or equal to 0.050 and q is of value greater than zero and less than or equal to 0.025, with the H.sup.+ of HGaO.sub.2 being at least partly exchangeable or exchanged with cations.
摘要:
A process is disclosed for oligomerizing light olefins or their mixtures, which consists in reacting said olefins, possibly diluted with an inert gas, by means of synthetic zeolites containing oxides of silicon, titanium and aluminum, which have, in their calcined and anhydrous state, the following empirical formula:pHAlO.sub.2 .multidot.qTiO.sub.2 .multidot.SiO.sub.2'wherein p has a vlue larger than zero and smaller than, or equal to, 0.050 and g has a value larger than zero and smaller than, or equal to, 0.025, and the H.sup.+ of HAlO.sub.2 can be at least partially substitutable or substituted with cations.
摘要:
A crystalline, porous, synthetic material is disclosed, together with its related preparation process.Such a material of zeolitic character, containing silicon, titanium and aluminum oxides, corresponds, in its calcined and anhydrous state, to the following empirical formula:p HAlO.sub.2.q TiO.sub.2.SiO.sub.2wherein p has a value greater than zero and lower than or equal to 0.050, q has a value greater than zero and lower than or equal to 0.025, and the H.sup.+ of HAlO.sub.2 can be at least partly replaceable or replaced by cations.
摘要:
A crystalline, porous, synthetic material is disclosed, together with its related preparation process.Such a material of zeolitic character, containing silicon, titanium and iron oxides, corresponds, in its calcined and anhydrous state, to the following empi rical formulapHFeO.sub.2.qTiO.sub.2.SiO.sub.2wherein p has a value greater than zero and lower than or equal to 0.050, q has a value greater than zero and lower than or equal to 0.025, and the H.sup.+ of HFeO.sub.2 can be at least partly replaceable or replaced by cations.
摘要:
A catalyst is described for the preparation of isobutene by dehydroisomerization of n-butane consisting of a solid, granular support of porous gamma-alumina on the surface of which catalytic quantities of platinum, silica and preferably also one or more promotors are deposited. In a preferred form of embodiment this catalyst is used with a second catalyst which may be formed of Boralite B or a solid granular support of gamma-alumina on the surface of which catalytic quantities of silica are deposited. The present invention relates also to the process of dehydroisomerization of n-butane to isobutene in which the catalyst is used and the relative operating conditions.
摘要:
A catalyst is described for the preparation of isobutene by dehydroisomerization of n-butane consisting of a solid, granular support of porous gamma-alumina on the surface of which catalytic quantities of platinum, silica and preferably also one or more promotors are deposited. In a preferred form of embodiment this catalyst is used with a second catalyst which may be formed of Boralite B or a solid granular support gamma-alumina on the surface of which catalytic quantities of silica are deposited.The present invention relates also to the process of dehydroisomerization of n-butane to isobutene in which the catalyst is used and the relative operating conditions.
摘要:
A catalytic system characterized in that it comprises: a first catalyst, having a hydrogenating function, consisting of solid particles of which at least 95% by volume having an equivalent diameter smaller than 20 μm, containing one or more sulfides of metals of group VI and/or VIII B, possibly prepared starting from an oil-soluble precursor of the same; and a second catalyst, having a cracking function, consisting of solid particles of which at least 90% by volume having an equivalent diameter larger than 5 μm and smaller than 5 mm, containing an amorphous silico-aluminate and/or a crystalline silico-aluminate and/or an alumina, the equivalent average diameter of the solid particles of the second catalyst being greater than the equivalent average diameter of the solid particles of the first catalyst. Said catalytic system can be used in a process for the hydroconversion of heavy oils which comprises sending the heavy oil to a hydroprocessing step carried out in one or more slurry reactors, in the presence of hydrogen or a mixture of hydrogen and H2S, obtaining a stream of products in vapor or liquid-vapor phase, and extracting at the bottom, in continuous or discontinuous, a liquid stream containing non-converted products together with the two catalysts of said catalytic system, said liquid stream extracted then being separated into a clarified primary stream containing the first catalyst, which is at least partially recycled to the hydroprocessing step, and a stream rich in the second catalyst, which is regenerated in a regeneration step and at least partially recycled to the hydroprocessing step.
摘要:
The cultivation of heterotrophic and phototrophic micro-organisms is integrated for the production of bio-oil for biofuels, wherein the overall algal suspension produced is first thickened, with recirculation of the excess water to cultivation containers, and then thermally treated at a high temperature. After cooling, a bio-oil phase is recovered together with a suspension rich in soluble carbohydrates and proteins which forms a nutritional/energy source for heterotrophic micro-organisms.
摘要:
The present invention relates to new organic-inorganic hybrid silicates and metal-silicates called ECS, characterized by an X-ray powder diffraction pattern with reflections exclusively at angular values higher than 4.0° of 2Θ, preferably at angular values higher than 4.7°, and an ordered structure containing structural units having formula (a) wherein R is an organic group: Formula (a) and possibly containing one or more elements T selected from groups III B, IV B, V B and transition metals, with a Si/(Si+T) molar ratio in said structure higher than 0.3 and lower than or equal to 1, wherein Si is the silicon contained in the structural unit (a). A process is also described, starting from disilanes, for the preparation of these materials, which does not include the use of templates or surfactants. These materials can be used as molecular sieves, adsorbents, in the field of catalysis, in the field of electronics, in the field of sensors, in the field of nanotechnologies.