40results about How to "Prevent strong interactions" patented technology

The invention discloses a compound base of a precious metal nanometer array and single layer graphene and a preparation method thereof. The invention includes transferring the single layer graphene prepared by a chemical vapor deposition method to the precious metal nanometer array, keeping warm for 30 minutes under the temperature of 50 DEG C, firmly combining the single layer graphene and the precious metal nanometer array to form the compound base of the precious metal nanometer array and the single layer graphene. The preparation method is simple and easy to operate and low in raw material price. The obtained compound base is order in large area. The compound base can be applied to photoelectron devices and the fields of surface enhanced raman chips, thin film solar batteries and the like.

The invention discloses a preparation method of high-activity hydrodemetalization catalyst for residuum. The method comprises the following steps: (1) dipping a formed alumina carrier with polyol and / or monosaccharide aqueous solution, and conducting hydrothermal carbonization treatment in a sealed container after dipping; (2) drying the alumina carrier subjected to hydrothermal carbonization treatment in the step (1), loading active components Mo and Ni, and then drying again; and (3) roasting the alumina loaded with active components obtained in the step (2) in nitrogen atmosphere, and then roasting in the air atmosphere to finally prepare the hydrodemetalization catalyst for residuum. The active components of the catalyst prepared by the method distributes uniformly on the carrier, have weak interaction with the carrier, and are easy for full sulfuration, so as to significantly improve the metal removal and desulfurization activity of the catalyst.

The invention discloses a method for preparing a residual oil hydro-demetallization catalyst. The method comprises the following steps: (1) utilizing a polyhydric alcohol and / or a monosaccharide water solution for impregnation of an alumina carrier, carrying out hydrothermal carbonization treatment in a sealed vessel after the impregnation, and carrying out drying; (2) utilizing hydrogen peroxide for surface modification treatment of the alumina carrier which is hydrothermally carbonized in step (1), carrying out drying, loading the modified alumina carrier with active constituents, and carrying out drying again; (3) utilizing the alumina carrier which is loaded with the active constituents in step (2) for calcination in a nitrogen atmosphere or an inertia atmosphere, and then for calcination again in an oxygen-containing atmosphere to obtain the residual oil hydro-demetallization catalyst. The prepared residual oil hydro-demetallization catalyst is characterized in that the functions of the active constituents and a carrier are relatively poor, and the active constituents are uniformly distributed on the carrier, so that the active constituents are easy to vulcanize, and the demetallization activity and the desulfurization activity of the residual oil hydro-demetallization catalyst are obviously improved.

The invention discloses a high-activity flue gas desulfurization catalyst and a preparation method thereof. The catalyst comprises an aluminum oxide carrier, active metals and carbon. Based on the weight of the catalyst, and the active metals being measured based on oxide, the weight content of Mo and / or W is 6.0-15wt%, and the weight content of Co and / or Ni is 1.0-4.0wt%. Being measured based on element, the weight content of carbon is 1-15wt%, and preferably 5-10wt%. The carbon content gradually decreases from the center to the outer surface of catalyst particles. The preparation method comprises the following steps: at least two polyol and / or monosaccharide water solutions are prepared; the solutions are sprayed onto an aluminum carrier with a sequence of high concentration to low concentration; a hydrothermal charring treatment is carried out in a sealed container; drying is carried out; active component impregnation is carried out; and drying is carried out; anaerobic high-temperature treatment is carried out, such that the flue gas desulfurization catalyst is obtained. The carbon content in the catalyst has a gradient distribution, and the active component can easily be fully sulfurized, such that the desulfurization activity of the catalyst is substantially improved.

The invention discloses a preparation method of a hydrogenation treatment catalyst. The preparation method includes the following steps: 1) impregnation an alumina carrier in an urea water solution, and drying the impregnated alumina carrier; 2) preparing polyol and / or monosaccharide water solutions in at least two different concentrations, and spray-impregnating the alumina carrier with the water solutions according to the sequence of high concentration to low concentration to form a low-to-high gradient distribution of concentrations of the polyol and / or monosaccharide from exterior to interior of the carrier, and performing hydrothermal treatment to the material; 3) drying the alumina carrier in the step 2), and impregnating the alumina carrier in an impregnating liquid containing active components, and performing hydrothermal treatment to the impregnated alumina carrier; and 4) drying the material in the step 3) and performing oxygen-free high-temperature treatment to prepare the catalyst. The content of carbon in the catalyst is distributed in a gradient manner, so that active components are easy to sulfurize completely. The active metal components are uniformly distributed on the surface of the carrier, so that the catalyst is significantly improved in demetalization activity.

The invention discloses a preparation method of a modified alumina carrier. The method comprises the following contents: (1) kneading and compacting clay after high-temperature treatment and pseudo-boehmite and carrying out drying and low-temperature roasting on a forming material; (2) soaking the material obtained in the step (1) by using an alkali solution, carrying out sealing thermal treatment, washing, drying and roasting to prepare an alumina carrier; (3) preparing at least two polyhydric alcohol and / or monosaccharide water solutions of different concentrations and spraying the polyhydric alcohol and / or monosaccharide water solutions to the alumina carrier according to the order of the concentration from high to small; and (4) carrying out hydrothermal carbonization treatment on the alumina carrier dipped in the step (3) in a sealed container, and carrying out drying treatment to prepare the modified alumina carrier. The alumina carrier prepared through the method has a proper pore structure; meanwhile, carbon modification is carried out on a channel surface of the alumina carrier and the carbon content is in uneven distribution in the radial direction of the carrier; the carrier is suitable for the field of preparation of a heavy oil or residual oil hydrodemetallization catalyst.

The invention discloses a method for preparing a hydrodemetalization catalyst. The method comprises the following steps: (1) preparing at least two kinds of polyalcohol and / or monosaccharide aqueous solutions of different concentrations, and carrying out imbibition on an alumina support according to a concentration descending sequence, so as to enable the concentration of polyalcohol and / or monosaccharide to form from-outside-to-inside and from-low-to-high gradient distribution on the support; (2) drying the dipped alumina support, then, dipping the alumina support by a dipping solution containing active ingredients and urea, and carrying out hydrothermal treatment on the wet agent in a hermetic container; and (3) drying the material obtained in the step (2), and then, carrying out oxygen-free high-temperature treatment, thereby obtaining the hydrodemetalization catalyst. According to the catalyst prepared by the method disclosed by the invention, the carbon content is of gradient distribution, the active ingredients are easily vulcanized completely, and active metal ingredients are uniformly distributed on the surface of the support, so that the demetalization activity of the catalyst is remarkably improved.

The invention discloses a hydrotreating catalyst and a preparation method and application thereof. The preparation method of the hydrotreating catalyst comprises the steps that (1), an alumina carrieris prepared or selected; (2) the alumina carrier prepared or selected in step (1) is dipped with a nitrogenous organic acid solution or an aromatic carboxylic acid solution; (3) the alumina carrier dipped with a pyridinedicarboxylic acid solution or the aromatic carboxylic acid solution in step (2) is subjected to low temperature drying treatment; and (4) the alumina carrier subjected to low temperature drying treatment in step (3) is dipped with an active component solution or active metal and an assistant, high temperature thermal treatment is conducted after dipping, and the hydrotreatingcatalyst is prepared. The catalyst prepared by adopting the method is high in metal component dispersity and sulfidity, and is liable to be sufficiently vulcanized, the number of generated active sites is large, improvement of the activity of the catalyst is facilitated, meanwhile, the preparation method is simple, and the production cost is low.

The invention discloses a preparation method for a residual oil hydrogenation and demetalization catalyst. The preparation method comprises the following steps: dipping and molding an aluminum oxide carrier in an active metal component dipping solution containing polyhydric alcohols and / or saccharides, drying the dipped carrier, and then roasting the carrier under an inert gas atmosphere and an air atmosphere in sequence to prepare the hydrogenation and demetalization catalyst. The active components of the catalyst prepared by the method have weak interaction with the carrier and are likely to be completely vulcanized, so that the demetalization and desulfuration activities of the catalyst are obviously improved.

The invention discloses a hydrogenation catalyst, a preparation method thereof, and a method used for preparing of o-diamino methyl cyclohexane. According to the hydrogenation catalyst, a gamma-Al2O3and Mg2Si composite carrier is taken as a carrier, and the active components are NiO and CuS. The hydrogenation catalyst can be used for o-diaminotoluene hydrogenation preparation of o-diamino methylcyclohexane, and is high in activity, selectivity, and stability; raw material conversion rate is 100%, product yield is higher than 98%; the selectivity on deamination products and secondary amine products is inhibited. The hydrogenation catalyst is capable of realizing 5000h long term operation, and catalyst activity is almost not changed, so that production cost is reduced greatly.

The invention discloses a preparation method of a carbon-containing residual oil hydrodemetallization catalyst. The preparation method includes the following steps: 1) preparing polyol and / or monosaccharide water solutions in at least two different concentrations, and spray-impregnating an alumina carrier with the water solutions according to the sequence of high concentration to low concentration to form a low-to-high gradient distribution of concentrations of the polyol and / or monosaccharide from exterior to interior of the carrier; 2) performing hydrothermal carbonization treatment to the impregnated alumina carrier in a sealed container and then drying the carrier; 3) impregnating the carrier in the step 2) with an impregnation liquid containing active metal components, placing the impregnated wet material in a pressure-resistant container, and feeding ammonia gas to perform stepwise treatment; and 3) drying the material treated in the step 3) and performing oxygen-free high-temperature treatment to prepare the catalyst. The content of carbon in the catalyst is distributed in a gradient manner, so that active components are easy to sulfurize completely, and the catalyst is significantly improved in demetallization and desulfurization activities.

The invention provides a preparation method of a carbon-containing macroporous alumina carrier. The preparation method comprises the following contents: (1) mixing and pulping pseudo-boehmite and deionized water, adding a proper amount of mixed acid solution of an organic acid and an inorganic acid to the slurry and carrying out heating reflux treatment; (2) adding a proper amount of urea for hydro-thermal treatment, carrying out washing and drying, and molding, drying and roasting the treated pseudo-boehmite to obtain an alumina carrier; (3) preparing at least two polyol and / or monosaccharide water solutions of different concentration, spraying the water solutions to the alumina carrier obtained in the step (2) according to the concentration order from high to low; and (4) carrying out hydrothermal carbonization treatment on the alumina carrier dipped in the step (3) and then drying to obtain the carbon-containing macroporous alumina carrier. The alumina carrier prepared through the method has relatively large pore volume and pore diameter, the carbon content is in uneven distribution in the radial direction of the carrier, and the carrier is suitable for the field of preparation of heavy oil or residual oil hydrodemetallization catalysts.

The invention discloses a preparation method for a high-activity flue gas desulfurization catalyst. The method comprises the following steps: (1) impregnating a porous inorganic refractory oxide carrier into an aqueous solution containing polyol and / or monosaccharide, transferring an impregnated material into a sealed container for hydrothermal treatment, and carrying out drying; (2) impregnating the porous inorganic refractory oxide carrier into a urea aqueous solution, and subjecting the carrier to drying treatment for subsequent usage; (3) impregnating the porous inorganic refractory oxide carrier obtained in the step (2) into an impregnating liquid containing active metal components, transferring the impregnated porous inorganic refractory oxide carrier into the sealed container, and carrying out hydrothermal treatment again; and (4) subjecting the material obtained in the step (3) to drying, and carrying out anaerobic high-temperature treatment so as to obtain the high-activity flue gas desulfurization catalyst. The catalyst prepared by using the method provided by the invention has the following advantages: the active metal components are uniformly distributed, have weak action with the carrier, are easy to be completely sulfurized, and significantly improve desulfurization activity of the catalyst.

The invention discloses a hydrodemetallization catalyst with high activity and a preparation method thereof. The catalyst comprises an aluminum oxide carrier, active metals and carbon. The catalyst comprises the following components based on the weight of the catalyst in percentages by weight: 6.0-15% of Mo and / or W, 1.0-4.0% of Co and / or Ni, wherein the active metals are calculated based on oxides, 1-15% of carbon, preferably 5-10% of carbon, wherein the carbon is calculated based on carbon element; carbon content is gradually reduced from the center to the external surface of a catalyst particle. The preparation method is as follows: aqueous solutions of polyol and / or monosaccharide of at least two different concentrations are prepared; the aqueous solutions are sprayed on the aluminum oxide carrier for dipping according to a sequence from a high concentration to a low concentration; hydro-thermal carbonization treatment is carried out in a sealing container, drying is carried out, active components are used for dipping, drying is carried out, anoxic high-temperature treatment is carried out, and the hydrodemetallization catalyst is carried out. The carbon content in the catalyst is distributed in gradient distribution, complete sulfuration for active components is easy, and demetalization and desulphurization activities of the catalyst are substantially improved.

The invention discloses a method for preparing a high-activity residual oil hydrodemetalation catalyst. The method comprises the following steps: 1) at least two polyol and / or monosaccharide aqueous solutions with different concentration are prepared, according to a decreasing concentration sequence, spray leaching is carried out on an alumina carrier, increasing gradient distribution of the polyol and / or monosaccharide concentration on the carrier from outer to inner; 2) hydro-thermal charing processing is carried out on the dipped alumina carrier in a sealed container, and then is dried; and 3) an active ingredient and urea-containing aqueous solution is used for dipping the alumina carrier in the step 2), the dipped material is converted to the sealed container for hydro-thermal processing, then is dried, and is performed with anoxic high temperature processing to obtain the hydrodemetalation catalyst. The carbon content in the prepared catalyst presents gradient distribution, the active ingredient is easily and completely sulfurated, distribution of the active metal ingredient on a surface is uniform, and the demetallization activity of the catalyst is obviously increased.

The invention discloses a high-activity flue gas desulfurization catalyst and a preparation method thereof. The catalyst of the invention contains a silicon-containing alumina carrier, active metal and carbon. With weight of the active metal as the benchmark, content of active metal is 5-20 wt% metered based on oxide, content of carbon is 1-15 wt% metered based on elements and content of the silicon-containing alumina carrier is 70-93 wt%. With weight of the silicon-containing alumina carrier as the benchmark, content of silica is 1-10 wt%. Specific surface area is 160-300 m<2> / g. Pore volume is 0.4-1.2 ml / g. The preparation method comprises the following steps: preparing at least two polyols and / or monosaccharide aqueous solutions with different concentrations, spraying the polyols and / or monosaccharide aqueous solutions onto the silicon-containing alumina carrier from high concentration to low concentration, carrying out hydro-thermal carbonization treatment in a sealed container, drying, immersing the active component, drying, and carrying out anoxic high-temperature treatment to obtain the flue gas desulfurization catalyst. The content of carbon in the catalyst is in graded distribution. The active component is easy to completely vulcanize. Desulfurization activity of the catalyst is remarkably raised, strength of the catalyst is high, and long-term operation can be stabilized.

The invention discloses a method for preparing a modified alumina carrier, which includes the following contents: (1) kneading high-temperature-treated clay and pseudo-boehmite into shape, drying and low-temperature roasting of the molded product; (2) using alkali The material obtained in the solution soaking step (1) is sealed and heat treated, and then washed, dried and roasted to prepare an alumina carrier; (3) prepare at least two polyol and / or monosaccharide aqueous solutions with different concentrations, from high to low. Spray-impregnate the alumina carrier on the alumina carrier in a low order; (4) Perform hydrothermal carbonization and drying treatment on the alumina carrier impregnated in step (3) in a sealed container to prepare a modified alumina carrier. The alumina carrier prepared by this method has a suitable pore structure. At the same time, the surface of the alumina carrier pore channel is modified with carbon, and the carbon content is unevenly distributed in the radial direction of the carrier. The carrier is suitable for preparing heavy and residual oil hydrogenation and demetallization. Catalysts and other fields.

The invention discloses a preparation method of high-activity hydrodemetalization catalyst for residuum. The method comprises the following steps: (1) dipping a formed alumina carrier with polyol and / or monosaccharide aqueous solution, and conducting hydrothermal carbonization treatment in a sealed container after dipping; (2) drying the alumina carrier subjected to hydrothermal carbonization treatment in the step (1), loading active components Mo and Ni, and then drying again; and (3) roasting the alumina loaded with active components obtained in the step (2) in nitrogen atmosphere, and then roasting in the air atmosphere to finally prepare the hydrodemetalization catalyst for residuum. The active components of the catalyst prepared by the method distributes uniformly on the carrier, have weak interaction with the carrier, and are easy for full sulfuration, so as to significantly improve the metal removal and desulfurization activity of the catalyst.

The invention discloses a preparation method of a hydrotreating catalyst. The method comprises the following steps: (i) preparing an Al-SBA-15 molecular sieve by taking amorphous silica-alumina dry glue as a raw material and adopting a P123 triblock copolymer as a template agent; (ii) subjecting the Al-SBA-15 mesoporous molecular sieve prepared in the step (i) and aluminum oxide to mixing, kneading and forming so as to obtain a carrier; and (iii) impregnating the carrier obtained in the step (ii) with an impregnating solution containing an active metal component and a trihydroxymethyl compound, and then carrying out drying and roasting to obtain the hydrotreating catalyst. The hydrotreating catalyst shows relatively high activity when being used in a hydrogenation denitrification reaction of heavy distillate oil.

The invention discloses a method for preparing a hydrodemetallization catalyst, which includes the following contents: (1) Prepare at least two kinds of aqueous solutions of polyols and / or monosaccharides with different concentrations, and spray and immerse them in aluminum oxide in order of concentration from high to low. on the carrier, so that the concentration of polyols and / or monosaccharides forms a gradient distribution from outside to inside, from low to high; (2) Dry the impregnated alumina carrier, and then impregnate it with active components and urea impregnating the above-mentioned alumina carrier with liquid, and performing hydrothermal treatment on the wet agent in a sealed container; (3) drying the material obtained in step (2), and then treating it at high temperature without oxygen to obtain a hydrodemetallization catalyst. The carbon content in the catalyst prepared by the method of the invention presents a gradient distribution, the active component is easy to be completely vulcanized, and the active metal component is evenly distributed on the surface of the carrier, thereby significantly improving the demetallization activity of the catalyst.

The invention provides a hydrogenation treatment catalyst and a preparation method thereof. The hydrogenation treatment catalyst comprises a hydrogenation metal component, an auxiliary agent and a support, and the hydrogenation metal component is a Group VIB metal and / or a Group VIII metal One or more of them, P is an auxiliary agent. The present invention also provides a method for preparing the above-mentioned hydrogenation catalyst. The preparation method is firstly preparing the catalyst precursor, then modifying the catalyst precursor, and finally loading the hydrogenation metal component. The active metal components of the catalyst prepared by the method of the invention have more reasonable distribution and high utilization rate, which not only reduces the metal consumption of the catalyst, but also improves the activity of the catalyst.

The invention discloses a hydrogenation catalyst, a preparation method thereof and a method for preparing o-diaminomethylcyclohexane. Described catalyst, carrier is γ-Al 2 o 3 and Mg 2 Si composite support, the active components are NiO and CuS. The catalyst can be applied to the hydrogenation of o-diaminotoluene to prepare o-diaminomethylcyclohexane, and exhibits high activity, high selectivity and high stability. The raw material conversion rate is 100%, the product yield is over 98%, and the selectivity of deamination products and secondary amine products can be suppressed. The catalyst realizes long-term operation of 5000 hours, and the activity of the catalyst does not change substantially, thereby greatly reducing the production cost.

The invention discloses a method for preparing a carbon-containing alumina carrier, which includes the following contents: (1) Impregnating pseudo-boehmite dry glue powder with an aqueous solution containing polyols and / or sugar substances, and the impregnated material is subjected to hydrothermal treatment Carbonization treatment, the treated pseudo-boehmite is shaped, dried, and roasted to obtain an alumina carrier; (2) Prepare at least two polyol and / or monosaccharide aqueous solutions of different concentrations, in order of concentration from high to low Spray-impregnate the alumina carrier in step (1) so that the concentration of polyol and / or monosaccharide forms a gradient distribution from outside to in from low to high on the carrier; (3) Dip the alumina impregnated in step (2) The carrier is subjected to hydrothermal carbonization treatment in a sealed container and drying treatment to obtain the carbon-containing alumina carrier of the present invention. The alumina carrier prepared by this method has larger pore volume and pore diameter, and the carbon content is gradient distributed in the radial direction of the carrier. The carrier is suitable for the preparation of heavy and residual oil hydrogenation demetallization catalysts and other fields.

The invention discloses a highly active flue gas desulfurization catalyst and a preparation method thereof, comprising an alumina carrier, active metals and carbon. Based on the weight of the catalyst, the active metals are calculated as oxides, and the weight content of Mo and / or W is 6.0wt %-15wt%, the weight content of Co and / or Ni is 1.0wt%-4.0wt%, the carbon is 1wt%-15wt% in element, preferably 5wt%-10wt%; the carbon content gradually decreases from the center of the catalyst particle to the outer surface . The preparation method is as follows: preparing at least two aqueous solutions of polyol and / or monosaccharide with different concentrations, spraying and dipping on the alumina carrier according to the order of concentration from high to low, performing hydrothermal carbonization treatment in a sealed container, drying, and impregnating the active group. separation, drying, and oxygen-free high temperature treatment to obtain a flue gas desulfurization catalyst. The carbon content in the catalyst of the invention is distributed in a gradient, and the active components are easy to be completely sulfurized, and the desulfurization activity of the catalyst is significantly improved.

The invention provides a preparation method of a carbon-containing alumina carrier. The preparation method comprises the following contents: (1) dipping pseudo-boehmite dry glue powder into a water solution containing polyols and / or carbohydrates, carrying out hydrothermal carbonization treatment on the dipped material, and molding, drying and roasting the treated pseudo-boehmite to obtain an alumina carrier; (2) preparing at least two polyol and / or monosaccharide water solutions of different concentration, spraying the water solutions to the alumina carrier obtained in the step (1) according to the concentration order from high to low; and (3) carrying out hydrothermal carbonization treatment on the alumina carrier dipped in the step (2) in a closed container and then carrying out drying treatment to obtain the carbon-containing alumina carrier. The alumina carrier prepared through the method has relatively large pore volume and pore diameter, the carbon content is in gradient distribution in the radial direction of the carrier, and the carrier is suitable for the field of preparation of heavy oil or residual oil hydrodemetallization catalysts.

The invention discloses a hydrotreating catalyst and its preparation method and application, comprising: (1) preparing or selecting an alumina carrier; (2) impregnating the alumina carrier prepared or selected in step (1) and containing nitrogen atoms and sulfur (3) Perform low-temperature drying treatment on the alumina carrier impregnated with organic compounds containing nitrogen atoms and sulfur atoms in step (2); (4) The impregnation activity of the alumina carrier after step (3) low-temperature drying treatment Component solutions or active metals and additives are impregnated and subjected to high-temperature heat treatment to obtain a hydrogenation catalyst. The catalyst prepared by the method not only has high metal component dispersity and sulfidation degree, is easy to be fully sulfided, and generates many active sites, which is beneficial to the improvement of catalyst activity, but also has a simple preparation method and low production cost.

The invention discloses a hydrocracking catalyst and a preparation method thereof, wherein the catalyst comprises an acidic component, a hydrogenation metal component and a carrier, and the acidic component is a heteropolyacid ammonium salt. The invention further provides a preparation method of the hydrocracking catalyst, wherein the preparation method comprises: modifying an alumina carrier, andsupporting an acidic component and an active component. According to the present invention, the catalyst obtained by the method exhibits high reactivity and high liquid-state hydrocarbon selectivityin the hydrocracking reactions of long-chain alkanes.

The invention discloses a hydrocracking catalyst and a preparation method thereof. The hydrocracking catalyst comprises an acidic component, a hydrogenation metal component and a carrier, and the acidic component is ammonium salt of a heteropolyacid. Also provided is a preparation method of the above-mentioned hydrocracking catalyst, the method includes modifying the alumina carrier, and then supporting the acidic component and the active component. When the catalyst obtained by the method of the invention is used in the hydrocracking reaction of long-chain alkanes, it exhibits relatively high reactivity and high selectivity for liquid hydrocarbons.

The invention discloses a high-activity flue gas desulfurization catalyst and a preparation method thereof. The catalyst of the invention contains a silicon-containing alumina carrier, active metal and carbon. With weight of the active metal as the benchmark, content of active metal is 5-20 wt% metered based on oxide, content of carbon is 1-15 wt% metered based on elements and content of the silicon-containing alumina carrier is 70-93 wt%. With weight of the silicon-containing alumina carrier as the benchmark, content of silica is 1-10 wt%. Specific surface area is 160-300 m<2> / g. Pore volume is 0.4-1.2 ml / g. The preparation method comprises the following steps: preparing at least two polyols and / or monosaccharide aqueous solutions with different concentrations, spraying the polyols and / or monosaccharide aqueous solutions onto the silicon-containing alumina carrier from high concentration to low concentration, carrying out hydro-thermal carbonization treatment in a sealed container, drying, immersing the active component, drying, and carrying out anoxic high-temperature treatment to obtain the flue gas desulfurization catalyst. The content of carbon in the catalyst is in graded distribution. The active component is easy to completely vulcanize. Desulfurization activity of the catalyst is remarkably raised, strength of the catalyst is high, and long-term operation can be stabilized.