842results about "Heterogenous catalyst chemical elements" patented technology

The invention discloses a high-entropy oxide for synergic nitrogen removal and catalysis as well as a preparation method and application thereof, and belongs to the technical field of material preparation, the high-entropy oxide is a single solid solution phase formed by five or more metal elements of Fe, Co, Ni, Cu, Mn, Ti and Ce and an oxygen element, the configuration entropy of the high-entropy oxide is greater than or equal to 1.5 R, R is a gas constant, and R is an oxygen constant. The mole fraction of each metal element is 0.1-0.3, and the sum of the mole fractions of the metal elements is 1. According to the high-entropy oxide with the synergistic nitrogen removal and catalysis effects and the preparation method and application thereof, a synergistic catalysis system is constructed through the high-entropy oxide and silicon carbide, and the high-entropy oxide has the multiple advantages of being high in nitrogen removal efficiency, high in stability, simple in process, environmentally friendly and wide in application range; the removal rate of total nitrogen and key nitrogen pollutants can reach 90% or above in the seawater high-salt environment, and the environment-friendly emission requirement is met.

The invention discloses a preparation method of CoWO (cobalt tungsten oxide) modified NbOp-n heterojunction NbO5 / CoWO photocatalyst powder. The preparation method comprises the following steps: dissolving cobalt salt and tungsten salt in deionized water, stirring and mixing, carrying out hydrothermal reaction in an autoclave, washing and drying to obtain CoWO powder; the preparation method comprises the following steps: dissolving niobium oxalate and ammonium carbonate in deionized water, adding CoWO powder, carrying out a hydrothermal reaction in an autoclave, and carrying out washing and drying treatment to prepare NbO / CoWO photocatalyst powder. According to the method, the hydrothermal reaction temperature is regulated and controlled, and the mass ratio of raw materials is optimized, so that the catalyst forms a p-n heterojunction structure of NbOmicron flower loaded CoWOnano particles. The prepared catalyst has high norfloxacin wastewater degradation efficiency under visible light irradiation, has the advantages of simple preparation process, low reagent cost, high catalytic activity and good structural stability, and can be effectively applied to purification treatment of antibiotic polluted water.

The invention belongs to the technical field of catalytic materials and hydrocarbon reforming, and particularly relates to a high-entropy catalyst as well as a preparation method and application thereof. The preparation method comprises the following steps: mixing a metal salt solution containing lanthanum, chromium, copper, zinc, manganese, nickel, iron and cobalt ions with a chelating agent and a dispersing agent for reaction, carrying out ultrasonic cavitation treatment to obtain sol, adjusting the pH value, gelatinizing under an oil bath heating condition to obtain a colloidal precursor, drying, and calcining in an air atmosphere to obtain a perovskite type high-entropy oxide precursor; and then treating in a reducing atmosphere to obtain the FeZnCuNiCo perovskite type high-entropy alloy catalyst which contains metal components of La, Cr, Ni, Mn, Fe, Zn, Cu and Co and takes a multi-metal alloy active center of Fe-Zn-Cu-Ni-Co as a main component. The high-entropy catalyst can meet the harsh requirements of high temperature, strong carbon deposition driving force and long-period operation in a propane dry reforming reaction, and is suitable for industrial application scenarios of continuous production of high-temperature synthesis gas.

The invention provides a composite catalyst for synthesis of methanol from CO2, a preparation method and application thereof, the composite catalyst is composed of a metal oxide MOX as a carrier and a loaded A-B2O3 composite active component, A is Co, Fe or Mn, and B is Gd, Y or La; mOX is selected from at least one of ZrO2, TiO2 and Al2O3; the mass of the A-B2O3 accounts for 10.5 wt%-32 wt% of the mass of the composite catalyst. By adopting the composite active component of Co, Fe or Mn and Gd, Y or La and taking ZrO2, TiO2 or Al2O3 as the carrier, the problems of low hydrogenation activity, poor thermal stability and easy sintering of the traditional catalyst are effectively solved, meanwhile, the defects of high cost and excessive CO2 conversion of the Ni-based catalyst are avoided, and the CO2 conversion rate and methanol selectivity are remarkably improved.

The invention discloses a sulfur-resistant non-noble metal catalyst for removing carbon monoxide and a preparation method thereof. The preparation method comprises the following steps: step 1, dissolving aluminum oxide, cerium-containing metal salt and a precipitator in a solvent, fully mixing, and dispersing to obtain a colloidal dispersion system; a hydrothermal product is obtained after the hydrothermal reaction, and solid powder A is obtained after the hydrothermal product is roasted; step 2, dropwise adding a copper-containing metal salt solution into the solid powder A under a ball-milling condition to obtain a turbid liquid; carrying out heat preservation roasting to obtain solid powder B; 3, roasting the molybdenum-containing metal salt, and performing thermal decomposition to obtain solid powder C; and 4, adding the solid powder C obtained in the step 3 into the turbid liquid of the solid powder B, dispersing, and roasting to obtain the required catalyst. The obtained catalyst is stable in overall structure and can still keep good catalytic performance in a sulfur-containing environment.

A method may include contacting a hydrocarbon-containing feed with a catalyst in a reactor to form an olefin-containing effluent, then at least partially separating the olefin-containing effluent from the catalyst. Passing the catalyst to a combustor and heating the catalyst by combusting a supplemental fuel. The supplemental fuel includes methane in an amount greater than or equal to 1 mol. %. Passing the catalyst from the combustor to the reactor, such that at least a portion of the catalyst continuously cycles between the reactor and the combustor. The catalyst includes from 0.1 wt. % to 10 wt. % of one or more metals chosen from gallium, indium, thallium or combinations thereof, from 5 ppmw to 1000 ppmw of one or more metals chosen from platinum, palladium, rhodium, iridium, ruthenium, osmium, or combinations thereof, from 100 ppmw to 30000 ppmw of chromium, and at least 85 wt. % support.

This invention relates to the field of synthesis and discloses a method for synthesizing hexamethylenediamine and co-producing cyclohexylimine. The method includes: (1) ammonolysis: bis(hexamethylene)triamine undergoes an ammonolysis reaction in the presence of an ammonolysis catalyst, ammonia, and hydrogen; wherein the ammonolysis catalyst contains active components Ni, La, and In; (2) the material obtained from the ammonolysis reaction is sequentially subjected to cyclohexylimine separation and hexamethylenediamine separation. This method can simultaneously obtain hexamethylenediamine and cyclohexylimine, and exhibits high reactivity, high conversion rate, and high selectivity.

The invention relates to a device and a method for deeply degrading organic matters in wastewater, the device comprises a shell, a water inlet area, a reaction area and a water outlet area are sequentially arranged in the shell along the moving direction of the wastewater, and the reaction area is respectively communicated with the water inlet area and the water outlet area; at least one set of ultrasonic energy concentrator is arranged in the water inlet area; an ultrasonic wave generation module is arranged in the reaction area, and the ultrasonic wave generation module comprises a low-frequency band, a middle-frequency band and a high-frequency band which are sequentially arranged in the wastewater moving direction; and the water inlet area and the reaction area are also filled with a supported catalyst. The contact electro-catalysis effect is excited through ultrasonic waves, metal elements of the supported catalyst are subjected to dynamic valence state transformation, and oxidizing active free radicals are continuously generated; the low-frequency section, the middle-frequency section and the high-frequency section are sequentially arranged in the reaction area, quenching of oxidative activity free radicals is synergistically reduced, uniform distribution of the oxidative activity free radicals is promoted, and wastewater organic matter reacts with the oxidative activity free radicals to be degraded.

The invention provides a preparation method of a hydrotalcite-derived cobalt-copper catalyst and application of the hydrotalcite-derived cobalt-copper catalyst in furfural hydrogenation reaction. A series of different layered composite metal oxide precursors are prepared through coprecipitation and ion exchange methods, the layered composite metal oxide precursors are applied to furfural hydrogenation reaction after being pre-reduced, and the reaction with pentanediol and furfuryl alcohol as target products shows excellent catalytic activity. By designing the element composition and structural distribution of the hydrotalcite precursor, the composition, the structure and the physical property of the catalyst are effectively modulated, and the distribution of hydrogenation products is effectively regulated and controlled. The furfural can be completely converted on the Co < 1.5 > Cu < 0.25 > Al < 0.5 > Ox catalyst, and the yield of the product pentanediol reaches 68.8%; the yield of the product furfuryl alcohol reaches 98% on the basis of the Co < 1.5 > Cu < 0.25 > Al < 1.75 > catalyst. Characterization results of the catalyst show that the hydrogenation performance of the catalyst strongly depends on sample element composition, valence states of active species Cu and Co, structural distribution and dispersity of the active species Cu and Co in a precursor and a synergistic effect among different species.

The application discloses a catalyst for preparing methyl acetate or ethanol by hydrogenation of dimethyl oxalate and a preparation method thereof. The catalyst comprises an active component, an auxiliary component and a carrier. The active component is a single substance or an oxide of Cu, the auxiliary component is a single substance or an oxide of W, the high active site is a Cu-W alloy interface and single Cu and W metals, and the carrier is one or more than two of silicon dioxide, aluminum oxide, zirconium oxide, zinc oxide, magnesium oxide and cerium oxide. The copper-tungsten alloy catalyst provided by the application has the advantages of structural stability, high mechanical strength, good heat conduction performance, high substrate conversion rate and high product selectivity. The preparation method is simple in steps, easy in raw material acquisition, low in cost, green in pollution, good in preparation repeatability and easy in scale production. The catalyst has extremely high stability and catalytic activity in the reaction of preparing methyl acetate or ethanol by hydrogenation of dimethyl oxalate, high ethanol or methyl acetate yield and high active component utilization rate.

The invention discloses a high-entropy perovskite catalytic material and a preparation method and application thereof, and belongs to the technical field of catalysts.The preparation method comprises the steps that soluble La < 3 + > salt, soluble Co < 2 + > salt, soluble Cu < 2 + > salt, soluble Fe < 3 + > salt, soluble Mn < 2 + > salt and a soluble X ion source (X is Ga, Zn or Zr) serve as raw materials, a complexing agent and water are added to form a mixed solution, a head product is obtained through a solution combustion method, and the high-entropy perovskite catalytic material is obtained through calcination. The chemical formula of the high-entropy perovskite catalytic material is La (CoaCubFecMndXe) O3. The high-entropy perovskite catalytic material provided by the invention has excellent thermal stability, and can still keep good catalytic activity and excellent catalytic stability at high temperature. When the high-entropy perovskite catalytic material prepared by the method is used as a catalyst for CO2 hydrogenation to prepare ethanol, the high-entropy perovskite catalytic material has excellent ethanol selectivity.

The invention provides a catalyst composition, including a mixture of catalytically active particles and a magnetic material, such as superparamagnetic iron oxide nanoparticles, capable of inductive heating in response to an applied alternating electromagnetic field. The catalytically active particles will typically include a base metal, platinum group metal, oxide of base metal or platinum group metal, or combination thereof, and will be adapted for use in various catalytic systems, such as diesel oxidation catalysts, catalyzed soot filters, lean NOx traps, selective catalytic reduction catalysts, ammonia oxidation catalysts, or three-way catalysts. The invention also includes a system and method for heating a catalyst material, which includes a catalyst article that includes the catalyst composition and a conductor for receiving current and generating an alternating electromagnetic field in response thereto, the conductor positioned such that the generated alternating electromagnetic field is applied to at least a portion of the magnetic material.

The application relates to a catalyst for selectively hydrogenating nitrophenylacetylene to prepare aminophenylacetylene. The Fe2O3-CeO2 / TiO2 catalyst is used, the solvent is anhydrous ethanol, the hydrogen source is hydrazine hydrate, and the nitrophenylacetylene is catalytically hydrogenated to prepare aminophenylacetylene at 80-150 DEG C. The catalyst can realize efficient hydrogenation of the nitro group in the nitrophenylacetylene, the selectivity of the aminophenylacetylene can reach 94.8% when the nitrophenylacetylene is completely converted, the selectivity of the aminophenylacetylene is basically unchanged when the reaction time is continuously prolonged, and there is no accumulation of harmful intermediates such as phenylhydroxylamine in the reaction process.

The invention relates to a catalyst for preparing cyclododecanone through cyclododecanol dehydrogenation and a preparation method and application thereof. The catalyst component comprises copper, zinc, zirconium, sodium, calcium, aluminum and iron; the catalyst is prepared from the following components in percentage by mass in an oxide form: 40 to 65 weight percent of copper oxide, 10 to 21 weight percent of zinc oxide, 10 to 30 weight percent of zirconium oxide, 5 to 20 weight percent of sodium oxide, 1 to 5 weight percent of calcium oxide, 0.5 to 1.5 weight percent of aluminum oxide and 0.05 to 0.5 weight percent of iron oxide. In one embodiment, according to the preparation method of the catalyst provided by the invention, water vapor is added during roasting in a nitrogen environment, so that the release speed of carbon dioxide is controlled, and formation of carbon deposition in the roasting process is reduced. The catalyst can solve the problem of low selectivity caused by low dehydrogenation reaction conversion rate and many by-product cyclododecene, and has the characteristics of high strength, good hydrothermal resistance, long service life and the like.

A catalyst and a method for producing the catalyst are provided. An exemplary catalyst is of the formula: Mo a V b Bi c M d O x This formula includes: In this formula, M is Ta or Nb, a is 1.0, b is 0.01 to 0.5, c is 0.005 to 0.2, d is 0.005 to 0.1, and x is the number of oxygen atoms required to make the catalyst electrically neutral. The values ​​of a, b, c, and d are determined based on the amount of each starting material used to form the catalyst. The catalysts provided herein may be suitable as catalysts in oxidative dehydrogenation reactions, such as the oxidative dehydrogenation of ethane.

This invention discloses the application of an oxide-coated copper-manganese spinel supported heterogeneous catalyst in the oxygen-free dehydrogenation of ethanol to acetaldehyde, belonging to the field of heterogeneous catalysis technology for the oxygen-free dehydrogenation of ethanol to acetaldehyde and hydrogen production. The reaction is carried out in a fixed-bed reactor under a nitrogen atmosphere at a temperature of 280°C and a mass hourly space velocity (WHSV) of 66.1 h⁻¹. ‑1 Under the given conditions, the ethanol conversion rate was 72.5%, the acetaldehyde selectivity was 95.0%, and the space-time yield of acetaldehyde based on copper-manganese composite oxides was 43.5 h⁻¹. ‑1 This invention achieves highly selective preparation of acetaldehyde and hydrogen under relatively mild conditions. The system possesses significant advantages, including simple catalyst preparation, high catalytic activity under high mass space velocity (MHSV) conditions, high MHSV yield of acetaldehyde, high atom utilization, and good stability. The CuMnTi-1 catalyst of this invention remains stable for over 70 hours. CuMnTi-1 improves the utilization rate of copper and manganese, enhances catalytic performance, reduces the amount of copper-manganese spinel required in the reaction, and lowers the overall cost of catalyst preparation.

The invention discloses a Fischer-Tropsch catalyst as well as a preparation method and application thereof. The Fischer-Tropsch catalyst comprises a carrier and a metal active component loaded on the carrier; the carrier is a hydrophobic carrier Al2O3-ZrO2 / MgO, a composite oxide Al2O3-ZrO2 / MgO is adopted as the carrier, the carrier is treated in a physical etching mode in the preparation process of the carrier, silicon carbide is embedded into the interior and the exterior of a colloid at the same time, and the surface roughness degree of the carrier can be increased; and the immersion of the hydrophobic solution is carried out while physical etching is carried out, so that pore channels in the hydrophobic carrier can be uniformly hydrophobic to a greater extent, the hydrophobicity is enhanced, and water generated by reaction is timely desorbed and is inhibited from being re-adsorbed, thereby reducing the occurrence of water-gas shift reaction, reducing the CO2 selectivity and improving the low-carbon olefin selectivity.

The application discloses a method for catalytic oxidation of carbon monoxide based on plasma hydroxylated high-entropy metal oxide catalytic material, and belongs to the technical field of flue gas treatment. The high-entropy metal oxide catalytic material is filled in a discharge cavity of a plasma reactor, carbon monoxide flue gas is introduced into the discharge cavity, and high-voltage discharge catalytic oxidation reaction is carried out to convert carbon monoxide into carbon dioxide. The method utilizes plasma discharge ionization of water vapor to form a large number of hydroxyl sites on the surface of the high-entropy metal oxide catalytic material to occupy oxygen vacancies, and the hydroxyl sites can promote the decomposition of O3 into active oxygen in the discharge cavity to efficiently oxidize and remove CO components in the flue gas. Meanwhile, the hydroxyl sites and SO2 are acidic components and repel each other, so that the oxygen vacancies are prevented from adsorbing SO2 and being poisoned, the efficiency and stability of the high-entropy metal oxide catalytic material in catalytic oxidation of CO in a humid sulfur-containing sintering flue gas environment are improved, and the method is particularly suitable for treatment of industrial complex flue gas.

The invention relates to the technical field of catalyst preparation, and discloses a carbon modified copper-based catalyst and a preparation method and application thereof. The method comprises the following steps: (1) sequentially carrying out coprecipitation and aging on an alkaline precipitant solution, a metal salt solution and an anion modifier solution to obtain an intermediate product I; and (2) under the condition that the oxygen concentration is not higher than 5% by volume, roasting the intermediate product I to obtain the carbon modified copper-based catalyst, the anion modifier solution contains sodium dodecyl diphenyl ether disulfonate and sodium gluconate in a molar ratio of 1: (1-10); the pH value of the anion modifier solution is 9-11; the metal salt solution contains zinc salt, copper salt and aluminum salt. The prepared carbon modified copper-based catalyst has the advantages of high conversion per pass of carbon dioxide, low activation temperature, high methanol selectivity, long-period operation and stable structure.

To provide a method for producing ethylene in high yield by selective hydrogenation of a gas mixture containing high-concentration acetylene generated by a methane pyrolysis process.SOLUTION: There is disclosed a process for converting methane into value-added compounds, wherein a gas mixture containing high-concentration acetylene as well as hydrogen formed through methane pyrolysis (for example, non-oxidative coupling of methane) is selectively hydrogenated in the presence of a bimetallic supported catalyst to obtain ethylene from acetylene in the gas mixture, while unreacted methane and hydrogen are recovered as byproducts and / or additionally recycled.SELECTED DRAWING: Figure 1

The application discloses a residual oil hydrodemetallization catalyst and a preparation method thereof. The method comprises the following steps: (1) an acid aluminum salt aqueous solution, an alkaline aluminum salt aqueous solution and a kaolin suspension liquid containing a surfactant are subjected to a first reaction to obtain slurry I; (2) an alkaline solution is introduced into the slurry I of step (1) to perform a second reaction to obtain slurry II; (3) the slurry II obtained in step (2) is subjected to hydrothermal treatment with a gallium nitrate solution, and then washed and dried to obtain a gallium-containing macroporous silica-aluminum material; (4) the gallium-containing macroporous silica-aluminum material is mixed with a plasticizing agent and a cementing agent, and then kneaded into a shape, and then dried and calcined to obtain a catalyst carrier; and (5) the catalyst carrier of step (4) is impregnated with an active metal impregnation liquid containing an organic acid and an alcohol compound, and then dried and calcined to obtain the residual oil hydrodemetallization catalyst. The catalyst can improve the demetallization activity and use stability of the catalyst in a residual oil hydroprocessing process.

The present disclosure provides a catalyst for SRO reaction. The catalyst comprises a solid acidic substance and a metal. In this case, at least 20% of the total pore volume of the catalyst corresponds to pores of the catalyst having a pore diameter of 10 nm or more. The present disclosure also provides a method using the catalyst.

The application provides a multi-level hole molybdenum-bismuth composite metal oxide catalyst and a preparation method thereof. 12 Bi 1.5 Fe 1.5 Co5Ce x Gd y K 0.5 O / TiO2, wherein 0 < x <= 1.2 and 0 < y <= 0.3. The catalyst comprises a carrier and a composite metal oxide, the composite metal oxide is dispersed in the carrier, the carrier is a multi-level hole TiO2, and the composite metal oxide is a composite oxide of molybdenum-bismuth-iron-cobalt-potassium and at least two kinds of rare earth metals. The catalyst is prepared by a deposition precipitation method. The multi-level hole molybdenum-bismuth composite metal oxide catalyst prepared by the application has a large specific surface area and contains at least two kinds of rare earth metals, which promotes high dispersion of active components, a synergistic effect between the rare earth metals, an increase in the number of active oxygen species and an increase in the selectivity of the catalyst for selective oxidation products.

An electric field catalyst that includes: a porous honeycomb substrate; a catalyst layer covering a surface of the porous honeycomb substrate; and a high-resistance layer that is higher in electrical resistivity than the catalyst layer between the honeycomb substrate and the catalyst layer.

The invention discloses a hydrogenation catalyst as well as a preparation method and application thereof. The hydrogenation catalyst comprises a carrier and active metal, the carrier is an aluminum oxide core wrapped by a carbon shell, the active metal is Mo and Ni, and on the basis of the weight of the catalyst, the content of MoO3 is 7.5 wt%-15.5 wt%, the content of NiO is 1.5 wt%-4.5 wt%, the content of carbon is 20 wt%-45 wt%, and the content of aluminum oxide is 35 wt%-70 wt%; and the ratio delta 1 of the content of the active metal in the shell layer to the content of the active metal in the core layer is 0.25: 1-0.75: 1. The preparation method comprises the following steps: (1) preparing active metal modified flour; (2) preparing active metal modified pseudo-boehmite microspheres; and (3) rolling the active metal modified flour and the active metal modified pseudo-boehmite microspheres for molding, then carrying out heat treatment, drying and roasting to obtain the hydrogenation catalyst. The catalyst disclosed by the invention has relatively high metal impurity capacity and relatively high Ca, Fe, Ni and V removal capacity, and is suitable for being used as a hydrogenation protection catalyst and a hydrodemetallization catalyst in a residual oil hydrogenation process.

The invention discloses a method for preparing monophenol compounds from lignin. The method comprises the following steps: mixing a raw material lignin with a solvent, and carrying out a one-step hydrogenation reaction in a hydrogen atmosphere under the action of a nickel-molybdenum-based catalyst to prepare the monophenol compound, the nickel-molybdenum-based catalyst comprises metal nickel and nickel oxide, molybdenum oxide and silicon oxide. The method provided by the invention has the characteristics of low production cost, simple separation, high monophenol compound yield and the like.

The invention relates to a method for producing a catalyst, involving the process of thermally treating one or more powders P or one or more shaped geometric precursor bodies so as to form one or more catalytically active multielement oxides, the one or more catalytically active multielement oxides being treated with a liquid after the thermal treatment, optionally filtered, and dried.

The invention discloses a catalyst for circulating hydrogen storage of 1, 4-butanediol / gamma-butyrolactone as well as a preparation method and application of the catalyst, and belongs to the technical field of catalysts. The catalyst comprises bimetallic active components CuO and AgO, a skeleton component, a rare earth auxiliary agent and calcium stearate, the skeleton component comprises CeO2 and at least one of the following oxides: ZnO, TiO2, ZrO2, MoO3 and Al2O3; on the basis of the total mass of the catalyst, the content of CuO is 55-80 wt%, and the content of AgO is 0.5-1.5 wt%; the total content of the skeleton component is 15-42 wt%, wherein the content of CeO2 is 10-38 wt%; the content of the rare earth additive oxide is 1-5wt%; and the content of calcium stearate is 1.5-4.5 wt%. The preparation method comprises the following steps: preparing a carrier precursor through a coprecipitation method; auxiliary loading and crystal phase regulation and control; and post-processing and forming. The catalyst provided by the invention completely avoids the use of elements harmful to the environment, and has high activity, high selectivity, excellent carbon deposition resistance and long-period stability.

The application discloses a preparation method of an octene aldehyde liquid-phase hydrogenation catalyst, and the preparation method comprises the following steps: (1) adding a weak acid into a salt solution containing silver, magnesium and aluminum, uniformly stirring, then adding a glycerol aldehyde, continuously stirring until a colloid is formed, grinding the colloid to obtain a powder, sieving, and roasting to obtain a carrier; and (2) preparing a precursor solution containing nickel and zinc, placing the precursor solution and the carrier in an ultrasonic container to shake, pouring the shaken solution into a well-sealed ball mill tank, ball milling, and then drying and roasting to obtain the catalyst. The catalyst is prepared by adding a silver-containing compound when the carrier is prepared and the ball milling method, so that the selectivity and stability of the catalyst are improved.

This invention relates to the field of catalytic diesel hydrorefining, specifically to a hydrorefining catalyst, its preparation method, its application, and a method for catalytic diesel hydrorefining. The catalyst comprises a hydrorefining active component and a support, wherein the support contains an alkaline earth metal, and the hydrorefining active component contains Group VIII and Group VIB elements; the hydrorefining active component has a layered stacked structure. The catalyst of this invention, comprising a hydrorefining active component and a support, wherein the support contains an alkaline earth metal, can modulate the acidity of the support surface, reducing the interaction strength between the hydrorefining active metal and the support. Combined with the preparation method of this invention, the catalyst of this invention, with its layered stacked structure of the hydrorefining active component, achieves the technical effect of improving the dispersion of the active component.