Abstract:
The present invention relates to new hybrid, organic-inorganic hybrid silicates and metal-silicates characterized by a crystalline structure containing structural units having formula (a), wherein R is an organic group possibly containing one or more element T selected from Group IIIB, IVB, VB and from transition metals. A process starting from cyclic trisilanes for the preparation of said materials, is also described. 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 area of nanotechnology.
Abstract:
New sulfide metal catalysts are described, containing Ni, Mo and W, an element Z selected from Si, Al and mixtures thereof, and possibly an organic residue, obtained by sulfidation of mixed oxide precursors, also new, characterized in that they comprise an amorphous phase and a wolframite isostructural crystalline phase, the crystallinity degree of said mixed oxides being higher than 0 and lower than 100%, preferably higher than 0 and lower than 70%. The catalysts of the invention are useful as hydrotreatment catalysts, and in particular as hydrodesulfurization, hydrodenitrogenation and/or hydrodearomatization catalysts.
Abstract:
New sulfided metal catalysts are described, containing a metal X selected from Ni, Co and mixtures thereof, a metal Y selected from Mo, W and mixtures thereof, an element Z selected from Si, Al and mixtures thereof, and possibly an organic residue, obtained by the sulfidation of mixed oxide precursors, also new, having general formula (A) X a Y b Z c O d . pC (A) possibly shaped without a binder, or by sulfidation of mixed oxides having formula (A), in shaped form with a binder, wherein X is selected from Ni, Co and mixtures thereof, Y is selected from Mo, W and mixtures thereof, Z is selected from Si, Al and mixtures thereof, 0 is oxygen, C is selected from: a nitrogenated compound N, an organic residue deriving from the partial calcination of the nitrogenated compound N, said nitrogenated compound N, when present, being selected from: a) an alkyl ammonium hydroxide having formula (I) R I R II R III R IV NOH ( I ) wherein the groups R I -R IV , the same or different, are aliphatic groups containing from 1 to 7 carbon atoms, b) an amine having formula (II) R 1 R 2 R 3 N (II) wherein R 1 is a linear, branched or cyclic alkyl, containing from 4 to 12 carbon atoms, and R 2 and R 3 , the same or different, are selected from H and a linear, branched or cyclic alkyl, containing from 4 to 12 carbon atoms, said alkyl being equal to or different from R 1 , a, b, c, d are the number of moles of the elements X, Y, Z, O, respectively, p is the weight percentage of C with respect to the total weight of the precursor having formula (A), a, b, c, d are higher than 0 a/b is higher than or equal to 0.3 and lower than or equal to 2, (a+b) /c is higher than or equal to 0.3 and lower than or equal to 10, preferably varying from 0.8 to 10 d = (2a+6b+Hc)/2 wherein H = 4 when Z = Si H = 3 when Z = Al and p is higher than or equal to 0 and lower than or equal to 40%. Said catalysts can be used as hydrotreating catalysts.
Abstract translation:描述了新的硫化金属催化剂,其含有选自Ni,Co及其混合物的金属X,选自Mo,W及其混合物的金属Y,选自Si,Al及其混合物的元素Z以及可能的有机残基, 通过硫化混合氧化物前体获得,也是新的,具有通式(A)Xa Yb Zc Od。 pC(A)可以成形为没有粘合剂,或通过硫化具有式(A)的混合氧化物,成型为粘合剂,其中X选自Ni,Co及其混合物,Y选自Mo,W和混合物 Z选自Si,Al及其混合物,0为氧,C选自:氮化合物N,衍生自含氮化合物N的部分煅烧的有机残基,所述含氮化合物N当存在时为 选自:a)具有式(I)RIRIIRIIIRIVNOH(I)的烷基氢氧化铵,其中基团RI-RIV相同或不同,是含有1至7个碳原子的脂族基团,b)具有式(II)的胺, R 1 R 2 R 3 N(II)其中R 1是含有4至12个碳原子的直链,支链或环状烷基,R 2和R 3相同或不同,选自H和直链,支链或环状的烷基,其含有4〜 12个碳原子,所述烷基等于或不同于R 1,a,b,c,d ar e分别是元素X,Y,Z,O的摩尔数,p是C相对于具有式(A)的前体的总重量的重量百分比,a,b,c,d高于 (a + b)/ c高于或等于0.3且低于或等于10,优选从0.8至10d =( 2a + 6b + Hc)/ 2,其中当Z = Al时,当Z = Si H = 3时,H = 4,p大于或等于0且小于或等于40%。 所述催化剂可用作加氢处理催化剂。
Abstract:
Catalytic system which can be used in processes for the hydroconversion of heavy oils by means of hydrotreatment in slurry phase, characterized in that it comprises: a catalyst, having the function of hydrogenating agent, containing MoS 2 or WS 2 or mixtures thereof in lamellar form or an oil-soluble precursor thereof; a co-catalyst, having nanometric or micronic particle- sizes, selected from cracking and/or denitrogenation catalysts. The co-catalyst preferably consists of zeolites having small-sized crystals and with a low aggregation degree between the primary particles, and/or oxides or sulfides or precursors of sulfides of Ni and/or Co in a mixture with Mo and/or W.
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:
The present invention relates to a process for obtaining hydrocarbons by the hydrotreatment of feedstocks from renewable sources, comprising mixtures of fatty acid esters and/or free fatty acids of biological origin, where said hydrocarbons may be used as fuels or components of fuels, in particular diesel fuels.
Abstract:
The invention relates to a spectrum converter, capable of absorbing at least part of an incident radiation and re-emitting it to a longer wavelength, wherein said converter contains particular hybrid organic-inorganic silicates or metal-silicates. Said converter is particularly useful for transforming light with a higher energy of the solar spectrum into light with a lower energy for use in solar devices: its use coupled with a photovoltaic cell optimizes the portion of solar spectrum which can be used by the cell for conversion to electric current, and also avoids that light with an excessively high energy causes damaging the cell itself.
Abstract:
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.
Abstract:
This invention relates to a process for the activated carbon preparation, using residues from refinery or hydroconversion processes of heavy petroleum products as carbon sources, which includes the following steps: • heating a purge at a temperature greater than or equal to 185 °C and not over 220 °C, • separating said heated purge by static sedimentation forming a clarified stream and a cake; • subjecting the cake directly to activation by physical or chemical route, and by excluding that the cake is subjected to a pyrolysis phase before the activation phase, forming activated carbon, and • then cooling such activated carbon at room temperature and washing with water, possibly in the presence of an acid, up to neutral pH; then • drying the washed activated carbon at a temperature comprised between 50 °C and 200 °C.
Abstract:
The present patent application relates to an activated carbon that has reversible type I nitrogen adsorption/desorption isotherms at 77K; a specific surface area (SSA) greater than or equal to 2000m 2 /g; and a total pore volume greater than or equal to 1 ml/g, of which the microporous component contribution is comprised between 70% and 95% by volume; a contribution of the mesoporous component comprised between 5% and 30% by volume with respect to the total volume of the pores; and a total heavy metal content less than or equal to 50 ppm.