Method of hydrofining of petroleum distillates
FIELD: oil refining industry and petrochemistry; hydrorefining of petroleum distillates.
SUBSTANCE: hydrorefining of petroleum distillates is carried out at elevated temperature and increased pressure in presence of catalyst containing carrier - highly porous cellular material on base of aluminum α-oxide modified by aluminum γ-oxide or sulfated zirconium dioxide; used as active component is palladium or palladium modified by palladium nano-particles or palladium in mixture with zinc oxide in the amount of 0.35-20.0 mass-%. The process is carried out at temperature of 150-200°C and pressure of 0.1-1.0 Mpa.
EFFECT: enhanced efficiency; facilitated procedure; possibility of hydrorefining of gasoline and diesel distillates.
2 cl, 1 tbl
FIELD: desulfurization and hydrogenation catalysts.
SUBSTANCE: invention relates to preparing hydrodesulfurization and dearomatization catalysts useful in processes of deep purification of motor fuels from sulfur-containing compounds and aromatics. A sulfur-resistant catalyst is provided including active component deposited on porous inorganic support including montmorillonite or alumina and characterized by that support is composed of zeolite H-ZSM-5 with Si/Al atomic ratio 17-45 (80-65%) and montmorillonite or alumina (20-35%), while active component is platinum or palladium, platinum and palladium in quantities, respectively, 0.2-2.0, 0.2-1,5. and 0.4-0.2% based on the total weight of catalyst. Described is also catalyst comprising platinum (0.2-2.0%) or palladium (0.2-1.5%), or platinum and palladium (0.4-2.0%) supported by Ca or Na form of montmorillonite, and also catalyst with the same active components supported by zeolite H-ZSM-5 with Si/Al atomic ratio 17-45.
EFFECT: increased sulfur-caused deactivation resistance of catalyst at moderate temperatures and under conditions efficiency in hydrodesulfurization and aromatics hydrogenation processes.
8 cl, 4 tbl, 30 ex
FIELD: carbon materials and hydrogenation-dehydrogenation catalysts.
SUBSTANCE: invention relates to improved crude terephthalic acid purification process via catalyzed hydrogenating additional treatment effected on catalyst material, which contains at least one hydrogenation metal deposited on carbonaceous support, namely plane-shaped carbonaceous fibers in the form of woven, knitted, tricot, and/or felt mixture or in the form of parallel fibers or ribbons, plane-shaped material having at least two opposite edges, by means of which catalyst material is secured in reactor so ensuring stability of its shape. Catalyst can also be monolithic and contain at least one catalyst material, from which at least one is hydrogenation metal deposited on carbonaceous fibers and at least one non-catalyst material and, bound to it, supporting or backbone member. Invention also relates to monolithic catalyst serving to purify crude terephthalic acid, comprising at least one catalyst material, which contains at least one hydrogenation metal deposited on carbonaceous fibers and at least one, bound to it, supporting or backbone member, which mechanically supports catalyst material and holds it in monolithic state.
EFFECT: increased mechanical strength and abrasion resistance.
8 cl, 4 ex
FIELD: petrochemical processes.
SUBSTANCE: hydrocarbon fractions are brought into contact, in presence of hydrogen-containing gas, with catalyst containing palladium on porous carrier, which contains mesopores with diameters no less than 4 nm and no large than 20 nm constituting 80 to 98% of the total volume of pore within a range of 4 to 20 nm.
EFFECT: deepened hydrogenation process due to increased catalyst activity regarding diolefins and selectivity regarding aromatic hydrocarbons.
2 cl, 1 tbl, 10 ex
FIELD: petrochemical process catalysts.
SUBSTANCE: invention relates to determining polymerizing activity of catalysts that can be used for hydrogenation of unsaturated compounds contained in liquid pyrolysis products. As a variable reflecting polymerizing activity of hydrogenation catalysts, optical density value of liquid mixture is used, said mixture containing unsaturated compounds and being kept in contact with catalyst at elevated temperature for a predetermined period of time. Determination of polymerizing activity is accomplished by comparing optical density of liquid mixture containing unsaturated compounds before and after its contact with catalyst. In order to measure optical density of liquid mixture, standard laboratory equipment (photocolorimeter and spectrophotometer) may be utilized.
EFFECT: enabled comparison of polymerizing activity of catalysts directly with respect to industrial feedstock.
3 cl, 2 dwg, 3 tbl, 38 ex
FIELD: industrial organic synthesis.
SUBSTANCE: title process resulting in production of aromatic polyamino compounds is carried out on heating in organic solvent (lower alcohols) medium in presence of supported palladium-containing catalyst, in particular, high-porosity (porosity 80-96%) cellular catalyst consisting of α-alumina-based support with active sulfated zirconium dioxide substrate and palladium as active component in amount 0.16-0.75 wt %.
EFFECT: simplified process, eliminated catalyst/hydrogenation catalysate separation stage, prevented destruction of catalyst, prolonged lifetime of catalyst, and increased purity of desired product.
FIELD: hydrogenation-dehydrogenation catalysts.
SUBSTANCE: invention relates to production of catalyst for selective hydrogenation of diene hydrocarbons, which can be used for hydrofining of liquid pyrolysis products. Catalyst is an active palladium component deposited in amount 0.01-1.0% on inorganic porous support. The latter has mesopores having diameters no less than 4 nm and no bigger than 20 nm, constituting 80 to 98% of the total pore volume in the catalyst, and is characterized by specific surface value 10 to 40 m2/g and total pore volume 0.1 to 0.2 cc/g.
EFFECT: increased activity and selectivity of diene hydrogenation process.
2 cl, 1 tbl, 11 ex
FIELD: polymerization catalysts.
SUBSTANCE: invention relates to preparation of catalysts used in styrene oligomerization processes producing dimers useful in manufacture of synthetic rubbers, heat carriers, insulation oil, polystyrene solvents. Catalyst is prepared through interaction of palladium (II) compound and boron trichloride compound in styrene medium at 333-353 K, said palladium (II) compound being, in particular, palladium acetylacetonato-bis(triarylphosphine) tetrafluoroborate of general formula [(Acac)Pd(PR3)2]BF4, wherein Acac denotes acetylacetonate, PR3 tertiary phosphine, and R phenyl, o-tolyl, or p-tolyl, and atomic ratio B/Pd = 3:10.
EFFECT: increased process efficiency to 153000 mole styrene per 1 g-atom Pd with dimer formation selectivity to 91%.
3 tbl, 15 ex
FIELD: organic chemistry, chemical technology.
SUBSTANCE: invention to a method for catalytic liquid-phase hydrogenation of 2',4',4-trinitrobenzanilide to yield aromatic polyamino-compounds. Method for liquid-phase hydrogenation of 2',4',4-trinitrobenzanilide is carried out at heating in water medium as a solvent in the presence of palladium-containing catalyst on a carrier. The process is carried out on block high-porous cellular catalyst with porosity value 70-95%, not less, and consisting of aluminum α-oxide-base carrier with active backing made of γ-Al2O3 palladium as an active component with the mass ratio = 0.45-0.85%. Invention provides simplifying technology of process with elimination of the separation step of catalyst from the hydrogenation catalyzate, prevention of the catalyst destruction, enhancing purity of the end product and increasing working life of the catalyst.
EFFECT: improved method of method.
FIELD: organic chemistry, chemical technology.
SUBSTANCE: invention relates to a method for liquid-phase catalytic alkylation of aromatic amines. Method involves alkylation reaction of aromatic amines in the presence of hydrogen and lower alcohols at temperature 50-70°C on a heterogeneous catalyst. The distinctive specificity of method represents alkylation of amine with formaldehyde solution in reactor with reaction zone filled with catalyst consisting of aluminum oxide-base block high-porous cellular carrier with porosity value 7-95%, not less, and palladium as an active component with the mass content = 1.3-2%. As a rule, in the alkylation process catalyst prepared by impregnation of block high-porous cellular carrier with palladium salts treated preliminary in the constant magnetic field is used. Usually, in the case of alkylation of aniline and for preferential synthesis of monomethylaniline the molar ratio aniline to formaldehyde solution = 1.6:(1.1-1.6) is used. Proposed method as compared with the nearest analog in the case of alkylation of aniline provides preparing monomethylaniline mainly, to decrease the content of palladium as an active component in catalyst and to decrease the reaction pressure and hydraulic resistance of catalytic layer also. Invention can be used in producing antiknock additives to motor fuels (gasolines).
EFFECT: improved alkylation method.
3 cl, 4 ex
FIELD: reduction-oxidation catalysts.
SUBSTANCE: invention relates to catalytic chemistry and, in particular, to preparation of deep-oxidation supported palladium catalysts, suitable, for example, in afterburning of motor car exhaust. Preparation involves depositing palladium from aqueous solution of palladium precursors followed by drying and calcination. Precursors are selected from nitrite anionic or cationic palladium complexes [Pd(NO2 -)(H2O)3]Anx or [Pd(NO2 -)n(H2O)m](Kat)y, wherein An are anions of acids containing no chloride ions, Kat is proton or alkali metal cation, n=3-4, m=0-1, x=1-2, and y=1-2. Nitrite ions are introduced into impregnating solution in the form of nitrous acid salts or are created in situ by reducing nitrate ions or passing air containing nitrogen oxides through impregnating solution. Ratio [Pd]/[NO2 -] in impregnating solution is selected within a range 1:1 to 1:4.
EFFECT: eliminated chlorine-containing emissions, increased stability of chlorine-free impregnating solutions, reduced their acidity and corrosiveness, and increased catalytic activity in deep oxidation reactions.
2 cl, 1 tbl, 16 ex
FIELD: organic synthesis catalysts.
SUBSTANCE: catalyst for modifying colophony contains, as carrier, high-porosity cellular α-alumina-based block material and, as active catalyst fraction, sulfated group IV metal oxide and metallic palladium.
EFFECT: increased modification rate due to developed catalyst surface and eliminated disintegration and carry-over of catalyst.
FIELD: petrochemical processes and catalysts.
SUBSTANCE: invention relates to processes for hydrocarbon feedstock conversion into aromatic hydrocarbons, in particular to light hydrocarbon aromatization process catalysts, to catalyst preparation processes, and aromatic hydrocarbon production processes. A composite light hydrocarbon aromatization process catalyst is described, which contains acidic microporous component with pore size at least 5 Å and oxide component exhibiting dehydrogenation activity and selected from aluminum hydroxide and/or oxide having transportation pore size at least 20 nm, said oxide component having been treated with promoter element compounds. Described are this catalyst preparation method and aromatic compound production process in presence of above-described catalyst.
EFFECT: increased activity and selectivity regarding formation of aromatic hydrocarbons and stabilized functioning of catalyst.
11 cl, 1 tbl, 23 ex
FIELD: disproportionation process catalysts.
SUBSTANCE: invention relates to generation of hydrogen through steam conversion of carbon monoxide and development of catalyst for indicated process. Invention provides carbon monoxide conversion catalyst showing high catalytic activity and heat-conductivity and a process of steam conversion of carbon monoxide using indicated catalyst. Catalyst is characterized by heat-conductivity at least 1 W(mK)-1, which enables performing process with low temperature gradient in direction transversal to gas stream direction.
EFFECT: increased catalytic activity and heat-conductivity.
7 cl, 4 dwg, 3 tbl, 10 ex
FIELD: organic chemistry, chemical technology, catalysts.
SUBSTANCE: invention relates to using zinc derivatives of the general formula (I): wherein L1 represents group of formulas: -E15(R15)(R15 ') or -E16(R16) wherein E represents nitrogen atom; L2 and L3 represent independently group of the formula: -E14(R14)(R14 ')(R14 '') wherein E14 represent carbon or silicon atom; E15 represent nitrogen atom; E16 represents oxygen atom; R14, R14 ', R14 '', R15, R15 ' and R16 represent independently hydrogen atom, (C1-C6)-alkyl, phenyl or radical of the formula -E14 'RR'R'' wherein E14 ' represents carbon or silicon atom; R, R' and R'' represent independently hydrogen atom or (C1-C6)-alkyl as catalysts in the (co)polymerization reaction of cyclic esters. Also, invention proposes a method for synthesis of block-copolymers or static copolymers or polymers involving simultaneous addition of one or some monomers chosen from cyclic esters, a polymerization catalyst, a growth chain initiating agent and optionally additives. A growth chain initiating agent and a polymerization catalyst are represented by a single compound of the general formula (I) given above. The claimed invention provides carrying out the homogenous polymerization process resulting to yield of a substance with regulated indices.
EFFECT: valuable properties of catalysts, improved method of synthesis.
8 cl, 7 ex