66results about How to "Improve hydrogenation activity" patented technology

The invention discloses a nano silicon dioxide loaded ruthenium-copper bimetallic catalyst as well as preparation and application thereof, and belongs to the technical field of acetylene hydrogenation reaction catalysts. A strong electrostatic adsorption method is adopted, nano silicon dioxide is used as a carrier, the pH of a solution is higher than the isoelectric point of the carrier through adjustment of ammonia water, and the carrier is negatively charged; in ammonia water, Cu and Ru respectively form positively charged metal complexes, and metals are anchored on the surface of the carrier under the action of strong electrostatic adsorption to prepare the atomic-scale dispersed ruthenium-copper bimetallic catalyst for acetylene selective hydrogenation reaction. When the prepared catalyst is used for catalyzing an acetylene hydrogenation reaction and the reaction temperature exceeds 170 DEG C, the acetylene conversion rate can reach 100%, and the ethylene selectivity is 90%-100%. And the catalyst has excellent stability, and can keep activity for a long time without obvious deactivation phenomenon.

The invention belongs to the technical field of selective catalytic hydrogenation, and provides a method for preparing imine through selective hydrogenation of nitrile compounds. The method for preparing imine through selective hydrogenation of the nitrile compound comprises the following steps: fully dissolving the nitrile compound in a solvent, uniformly mixing, adding a transition metal loaded M / SiC-Bx catalyst, fully mixing to form a suspension, then transferring the suspension into a reaction kettle, sealing, purging with hydrogen, maintaining the hydrogen pressure to be 0.1-5MPa, keeping the pressure of the hydrogen to be 0.1-5MPa, and carrying out vacuum drying to obtain the imine. Under the stirring condition, the temperature of the reaction system is kept at 30-150 DEG C, the reaction is carried out for 0.5-12 hours, the imine compound can be obtained, and x is any numerical value between 0.01 and 2. After the transition metal is loaded on the B-doped SiC, the surface of the SiC becomes rich in electrons, so that the capability of activating reaction substrates (nitrile compounds) and hydrogen overflow is obviously improved, and the activity of the catalyst is further improved.

The invention relates to the field of catalysts, in particular to a copper-based catalyst and a preparation method and application thereof.The preparation method comprises the following steps that S1, a first solution containing a zinc source and an aluminum source and an alkaline precipitator solution are subjected to first mixing to obtain turbid liquid; carrying out second mixing on the turbid liquid, a second solution containing a copper source and the alkaline precipitant solution to obtain a mixed material; s2, carrying out aging treatment on the mixed material to obtain aged slurry; s3, washing the aged slurry, and then carrying out drying treatment and roasting treatment; wherein the second solution also contains a coupling agent and a metal additive; the coupling agent comprises a titanate coupling agent; the metal additive contains a first metal element, and the first metal element is selected from at least one of an IIA group element, an IVB group element and a VIB group element. The copper-based catalyst provided by the invention can significantly improve the yield of methanol in a reaction for preparing methanol by hydrogenation of carbon dioxide.

The invention relates to the related technical field of pyrolysis gasoline first-stage selective hydrogenation catalysts, and particularly discloses a nickel-based catalyst as well as a preparation method and application thereof. The preparation method comprises the following steps: S1, dissolving an aluminum (III) salt and a gallium (III) salt in a first solvent, adding a thickening agent, and uniformly mixing; then, sequentially carrying out aging, drying and first roasting in a protective atmosphere, so as to obtain an Al2O3-Ga2O3 carrier; step S2, dissolving a nickel (II) salt in a second solvent, and then adding the Al2O3-Ga2O3 carrier obtained in the step S1; and then, sequentially carrying out ultrasonic treatment, evaporating the second solvent to dryness, and carrying out secondary roasting in a protective atmosphere, so as to obtain the nickel-based catalyst. The nickel-based catalyst is prepared by the preparation method. The nickel-based catalyst is applied to first-stage selective hydrogenation of pyrolysis gasoline. The hydrogenation activity and selectivity of the nickel-based catalyst in first-stage selective hydrogenation of pyrolysis gasoline are greatly improved.

The invention relates to a method for preparing 4, 4 '-diaminodiphenyl ether. According to the method, 4, 4 '-dinitrodiphenyl ether is used as an initial raw material, and 4, 4'-diaminodiphenyl ether is prepared through catalytic hydrogenation reduction of a supported catalyst; in the preparation of the catalyst, the dispersion degree of the metal active component on the carrier is improved by virtue of the membrane dispersion microreactor on the premise of not using a surfactant, the metal dosage is reduced, the supported structure is integrally formed, and continuous production of the catalyst precursor is realized. The preparation process provided by the invention is more green and efficient, is applied to hydrogenation reduction of 4, 4 '-dinitrodiphenyl ether under mild reaction conditions, shows excellent performance, and reduces the production cost.

The present invention discloses a waste plastic oil hydrofining catalyst and a preparation method thereof, the catalyst comprises an active component and a carrier, the total mass of the catalyst is 100%, the active component accounts for 10 wt%-30 wt%, the carrier accounts for 70 wt%-90 wt%, the carrier comprises a Ce (at) Cu-M / Al2O3 composite oxide, and M is an alkali metal oxide or an alkaline earth metal oxide. According to the present invention, the synthesized Ce (at) Cu-CaO / Al2O3 composite oxide is adopted in the carrier material, such that the chlorine resistance of the catalyst is improved, the dispersity and the carbon deposition resistance of the active component on the catalyst surface are significantly improved, the high hydrogenation activity of the catalyst is obtained, the hydrogenation catalysis performance of the catalyst is effectively improved, and the waste plastic oil hydrofining dechlorination effect is improved.

The invention provides a diesel oil hydrofining catalyst. The diesel oil hydrofining catalyst comprises a modified alumina carrier and an active component, the active component is an oxide of active metal, and the active metal comprises at least one of Co, Mo, Ni and W; the modified alumina carrier is alumina hydrothermally modified by ammonium fluoborate; the B / L acid value of the modified alumina carrier is 0.07 to 0.15; the specific surface area is 240-400 m < 2 > / g, and the pore volume is 0.55-0.80 mL / g. The diesel oil hydrofining catalyst containing the B acid can promote removal of sulfides with steric hindrance in distillate oil through a direct desulfurization reaction path and a hydroisomerization-direct desulfurization reaction path, promote adsorption and removal of nitrides, and reduce mutual inhibition effect in the removal process of the sulfides and the nitrides; and the diesel oil hydrofining catalyst has excellent hydrogenation activity.

The application discloses a petroleum resin hydrogenation catalyst and a preparation method thereof. The petroleum resin hydrogenation catalyst comprises a first phase and a second phase; the first phase comprises aluminum oxide and nickel oxide, the second phase comprises aluminum oxide, zinc oxide and nickel oxide, and the catalyst has a spherical core-shell structure. The preparation method of the petroleum resin hydrogenation catalyst comprises the following steps: firstly, preparing an aluminum oxide-nickel oxide composite material; then, uniformly dispersing the composite material with a surfactant and a hydrocarbon-containing compound to obtain material A; uniformly mixing aluminum sol, a zinc-containing compound, a nickel-containing compound, a curing agent and an emulsifier additive to obtain a mixed solution; finally, mixing the material A with the mixed solution, and further performing forming, aging, extraction, washing, drying and calcination to obtain the petroleum resin hydrogenation catalyst. The petroleum resin hydrogenation catalyst has the advantages of high sulfur resistance, high hydrogenation decolorization performance and high stability, and is especially suitable for C5 and C9 petroleum resin hydrogenation treatment processes.

The invention relates to a preparation method of an aromatized gasoline hydrogenation deolefination catalyst. The method mainly solves the problems of high content of precious metals required by a catalyst and complex preparation process in the process of removing olefins in aromatized gasoline at present. The preparation method is characterized by comprising the following steps: step 1, adding soluble silver salt to an alumina carrier by adopting an equivalent-volume impregnation method, and drying and roasting to obtain a silver-loaded alumina catalyst precursor; step 2, adding soluble palladium salt into the silver-loaded aluminum oxide catalyst precursor obtained in the step 1 by adopting an equivalent-volume impregnation method, and drying and roasting to obtain a palladium-silver-loaded aluminum oxide catalyst precursor; and step 3, reducing the palladium-silver-loaded alumina catalyst precursor to obtain the catalyst. The preparation method of the aromatized gasoline hydrogenation olefin removal catalyst has the characteristics of low noble metal content, simple preparation process, high selective hydrogenation activity in the use process, long service life and the like, is suitable for selective hydrogenation of aromatized gasoline to remove trace olefin, and has a wide application prospect.

This application discloses a compatibilizer for polystyrene / polyolefin blends and its preparation method, belonging to the field of block copolymers. A block copolymer is disclosed, comprising polystyrene blocks and polyethylene blocks; the block copolymer is crystalline; the aggregated structure of the block copolymer consists of a polystyrene microphase region, a polyethylene crystalline region, and a branched amorphous region—three phases coexisting. This block copolymer exhibits extremely high compatibility with both polystyrene and polyolefin materials, effectively reducing interfacial tension between different materials, significantly improving the impact resistance, mechanical properties, and rheological behavior of polystyrene / polyolefin blends, without damaging other properties of the materials, and without side reactions such as crosslinking or degradation; this block copolymer exhibits plastic processing properties at high temperatures and elastomer properties at room temperature, classifying it as a thermoplastic elastomer; this block copolymer is also more flexible and has better transparency.

The invention provides a production method of petroleum coke, and belongs to the technical field of petroleum coke. The method comprises the following steps: mixing a residual oil raw material with hydrogen, heating and reacting under the action of a catalyst and a desulfurizer to generate low-sulfur petroleum coke and an oil-gas mixture, removing hydrogen sulfide from the oil-gas mixture with water, and recovering hydrogen; the catalyst is a zirconium-based metal organic framework material which is modified by polydopamine loaded with rhodium, molybdenum and nickel and is provided with an amino group; the desulfurizing agent is a polydopamine modified zinc / manganese-based mesoporous molecular sieve. The production method of the petroleum coke is simple, mild in condition and relatively low in production cost, the catalyst and the desulfurizer can be repeatedly used, industrial mass production is easy to realize, and the method has a wide application prospect.

A hydrogenation catalyst is disclosed, using alumina as a support, on which molecular sieves and active components are loaded, including noble metals and promoter metals. The noble metals are Pt and / or Pd, and the promoter metals are Ni and / or Co. By weight of the catalyst, the molecular sieve accounts for 1-10%, the noble metals for 0.01-0.5% (based on elemental composition), and the promoter metals for 0.1-5% (based on elemental composition). The molecular sieves are loaded on the outer surface of the catalyst. This invention sequentially loads promoter metals and noble metals onto a support, and then obtains the catalyst through hydrothermal mixing with a molecular sieve precursor. This approach improves the contact area between the molecular sieve and the active metal, and facilitates the loading of the molecular sieve onto the active sites of the active metal, fully utilizing the molecular sieve's ability to donate H protons and enhancing the catalyst's hydrogenation activity. Furthermore, it increases the utilization rate of the molecular sieve, thus reducing the amount of molecular sieve used and lowering the catalyst cost. It exhibits higher olefin saturation activity and selectivity for the hydrotreating of reformed oils.

The invention relates to the technical field of catalysts, in particular to a catalyst, a preparation method thereof and a preparation method of hexamethylenediamine. The catalyst provided by the invention comprises a carrier, an active component and an auxiliary agent, the active component comprises Ni; the auxiliary agent comprises Fe and Cr. According to the catalyst disclosed by the invention, the bimetallic auxiliaries Fe and Cr are introduced, so that the content of zero-valent Ni is effectively increased, the hydrogenation activity is promoted, and the reaction process is accelerated; the catalyst is used for preparing hexamethylenediamine through adiponitrile hydrogenation, and the conversion rate of adiponitrile and the selectivity of hexamethylenediamine under mild conditions are improved.

The invention belongs to the technical field of pharmaceutical chemicals, and provides a continuous preparation method of hydrogenated lecithin based on a microreactor. The method comprises the following steps: (1) dissolving lecithin in a solvent to obtain a lecithin solution; (2) continuously pumping the lecithin solution into a microreactor filled with a palladium-loaded catalyst, and simultaneously introducing hydrogen to carry out hydrogenation reaction; (3) after the reaction is finished, removing the solvent to obtain hydrogenated lecithin; the solvent is one or more of methanol, ethanol, normal hexane or normal heptane. The microchannel continuous flow technology is matched with the selection of the catalyst and the solvent, so that the lecithin is hydrogenated more thoroughly, and the stability, dispersity and emulsibility of the hydrogenated lecithin are improved; besides, an adopted solvent system is green and safe, reaction conditions are mild, a catalyst does not need to be separated, continuous operation, short reaction time and high production efficiency can be achieved, safety and economy are obviously improved, and the method is suitable for industrial application.

The invention discloses a regeneration method of an inactivated hydrogenation catalyst, which comprises the following steps: mixing the inactivated hydrogenation catalyst with a first auxiliary agent, roasting, and separating to obtain a material A; and fully and uniformly mixing the separated material A, a second auxiliary agent, a third auxiliary agent and an alcohol solvent, and carrying out roasting treatment to obtain the regenerated hydrogenation catalyst. The invention also provides the regenerated hydrogenation catalyst obtained by the regeneration method. The integral regeneration method provided by the invention does not need to use a vulcanizing agent for secondary vulcanization, so that the vulcanization process is omitted, and the technical economy is good.

The invention discloses an iron-based core-shell catalyst for residual oil suspension bed hydrocracking and a preparation method thereof. First, a hydrothermal-coprecipitation method is used to prepare in situ a SiO2@ZnFe-LDHs binary hydrotalcite iron-based catalytic material with a core-shell structure. After roasting in an air atmosphere, an iron-based core-shell catalyst (SiO2@ZnFe-LMOs) is obtained. The prepared catalyst has low particle size and can be highly dispersed in a residual oil medium. At the same time, the specific surface area of ​​the catalytic material is relatively large, which helps the residual oil to fully contact the catalyst. This type of catalyst is applied to residual oil suspension bed hydrocracking, has a higher hydrogenation activity, effectively suppresses the generation of gaseous small molecules and coke, improves the residual oil molecule utilization rate, and the product gasoline and diesel yield is higher than 50%, and has a higher conversion rate and liquid yield, which will have a good application prospect in industry.

The invention discloses a molybdenum-based inferior oil slurry reactor hydrocracking catalyst, a preparation method and an application method, and the preparation method comprises the following steps: mixing slurry reactor hydrocracking tailings with naphtha obtained by the process, and separating to remove oil in the tailings to obtain solid residues; roasting in an air atmosphere to obtain solid powder; under the stirring condition, dissolving each gram of the solid powder by using 2-6ml of ammonia water, and controlling the dissolving temperature to be 50-100 DEG C and dissolving for 1-6 hours to obtain a first mixture; filtering to obtain a dissolving solution; under a stirring condition, adding a methanol solution of zinc nitrate and dimethylimidazole into the dissolved solution; reacting at room temperature for 4-12 hours to obtain a second mixture; filtering to obtain a precipitate in the second mixture; the precipitate is dried for 1-12 h at the temperature of 60-150 DEG C, and a catalyst precursor of ZIF-8 coated molybdenum salt is prepared; and roasting the catalyst precursor of the ZIF-8 coated molybdenum salt in an oxygen-free atmosphere at 400-800 DEG C for 1-6 hours to obtain the molybdenum-based poor-quality oil slurry reactor hydrocracking catalyst.

The invention discloses a heterogeneous catalyst and a preparation method thereof, and hydrogenated butadiene-acrylonitrile rubber and a preparation method and application thereof. The heterogeneous catalyst comprises a composite oxide carrier of SiO2 and IVB group metal oxide, and an active component Pd and an oxide thereof loaded on the composite oxide carrier, and the IVB group metal oxide is TiO2 and / or ZrO2; the surface characteristic of the composite oxide carrier is that three characteristic peaks exist at the position of 620-710 cm <-1 > and three characteristic peaks exist at the position of 2850-2960 cm <-1 > in an infrared spectrum. According to the present invention, the heterogeneous catalyst and the homogeneous catalyst cooperate, the high-molecular polymer material is subjected to hydrogenation saturation at the low temperature and the low pressure, the prepared hydrogenated high-molecular polymer, especially the nitrile rubber product, has the high hydrogenation degree, and the heterogeneous catalyst can be used for many times so as to provide the good application prospect. The catalyst is easy to separate and recover.

The invention discloses a preparation of a nano-sheet Pd-based catalyst and its application in catalytic hydrogenation of nitrile rubber, wherein a titanium dioxide nanosheet prepared by a hydrothermal method is used as a carrier, an oxygen vacancy defect is constructed thereon by a NH3 / N2 high temperature pretreatment method and N species are introduced, and then the active metal Pd is loaded by an equal volume impregnation method, and then the nano-sheet Pd-based catalyst is obtained by reduction. The oxygen vacancy defects and N species on the surface of the titanium dioxide nanosheet carrier in the catalyst can be used together as active component anchoring points to achieve efficient and stable loading of Pd, which enhances the metal-carrier interaction, is conducive to improving the stability of the catalyst, and is applied to the hydrogenation reaction of NBR, with efficient catalytic performance and good recycling performance.

The invention relates to a catalyst for preparing 1, 3-propylene glycol through hydrogenation of beta-propiolactone and a preparation method and application thereof.The catalyst comprises an active component, a structural auxiliary agent, an electronic auxiliary agent and a carrier, the active component of the catalyst is Cu metal, the structural auxiliary agent comprises one or more of Al, Zr, Zn, graphite and carbon nitride, the electronic auxiliary agent comprises one or more of Mn, P, La and Ce, and the carrier is a carrier. The carrier is SiO2, and in the catalyst, the content of Cu metal is 20-40 wt%, the content of the structural auxiliary agent is 0.1-20 wt%, and the content of the electronic auxiliary agent is 0.1-2 wt%. Compared with the prior art, the method has the advantages that the raw material beta-propiolactone is high in thermal stability and activity, side reactions in the hydrogenation process can be effectively reduced, the copper catalyst is high in hydrogenation activity and selectivity, the process is simple and efficient, the production continuity degree is high, subsequent separation and purification are simple, the product purity is high, and the method is suitable for large-scale production.

The invention relates to the technical field of heavy oil hydrocracking, and particularly discloses a self-sulfuration oil-soluble molybdenum-tungsten composite catalyst and a preparation method and application thereof.The preparation method comprises the following steps that S1, a sulfuration agent is added into a mixture containing a molybdenum-containing compound and a tungsten-containing compound, stirring reaction is conducted at the temperature of 50-120 DEG C, and a thiomolybdate and thiotungstate mixture is obtained; and S2, stirring the mixture of thiomolybdate and thiotungstate prepared in the step S1 and a long-carbon-chain amide compound at 30-150 DEG C to react, and distilling the reaction product to remove water, thereby obtaining the self-sulfuration oil-soluble molybdenum-tungsten composite catalyst. According to the preparation method, crystallization and washing are not needed, the self-vulcanized oil-soluble molybdenum-tungsten composite catalyst is obtained by directly reacting with the long-carbon-chain amide compound, the prepared product is high in yield, and the problem of loss of effective metal components caused by washing can be avoided.

This invention relates to the field of catalyst preparation technology, and more specifically, to the preparation and application of a metal catalyst for the production of the rubber antioxidant 6PPD. Copper nitrate and zinc nitrate compounds are dissolved in deionized water, and silicate esters are added and mixed in a water bath. The pH is adjusted, the mixture is aged, filtered, and washed with water to obtain the catalyst precursor. Copper halide is added and stirred until homogeneous, then dried in an oven, ground, and calcined to obtain the metal catalyst for the production of the rubber antioxidant 6PPD. This invention's metal catalyst maintains high activity and selectivity while also being low in cost, exhibiting excellent stability and environmental friendliness. The preparation process is simple, reproducible, and suitable for large-scale production, providing a novel catalytic solution with high industrial application value for the efficient and green synthesis of p-phenylenediamine antioxidants.

This invention discloses a magnesium-aluminum layered double hydroxide (MLD)-based solid alkali-supported ruthenium catalyst, its preparation method, and its application, belonging to the field of chemical catalytic materials technology. This invention uses magnesium-aluminum MLD as a support, metallic ruthenium as the hydrogenation active component, and magnesium oxide as the alkaline component. The preparation method involves mixing an aqueous dispersion of magnesium-aluminum MLD with frozen magnesium salt and an alkaline solution. The core step is to utilize a freeze-thaw process to perform high-dispersion exfoliation and hydrolysis reactions between the magnesium-aluminum MLD layers, generating magnesium hydroxide attached to the support. This magnesium hydroxide is then pyrolyzed to form a MgO / LDHs solid alkali catalyst precursor. This precursor is dispersed in water, mixed with an aqueous ruthenium salt solution, and reduced with a reducing agent solution to obtain the final catalyst. The freeze-thaw process of this invention significantly improves the dispersibility of the active component, achieving a catalyst specific surface area of ​​185 m² / g and a pore volume of 0.28 m³ / g. Applied to the selective hydrogenation reaction of nitrobenzene using methanol as a hydrogen source, no external alkali is required, achieving a nitrobenzene conversion rate of 61.50% and an aniline selectivity of 100%.

The application provides a Co@ZrC catalyst and a preparation method and application thereof in furfural compound hydrogenation deoxygenation, the preparation method is as follows: using fumaric acid and zirconium salt as raw materials, a catalyst precursor Zr-MOF is prepared by a solvothermal synthesis method, then the precursor is impregnated with a cobalt salt, and in-situ high-temperature pyrolysis carbonization reduction is carried out to prepare the Co@ZrC catalyst. The catalyst is used in selective hydrogenation deoxygenation of furfural to prepare 2-methyl furan and selective hydrogenation deoxygenation of 5-hydroxymethyl furfural to prepare 2,5-dimethyl furan, and the target products are obtained in high yield. The catalyst preparation method is simple, the catalyst has high activity and selectivity and good stability, the furfural selective hydrogenation deoxygenation reaction condition is mild, the product yield is high, and obvious industrial production advantages are obtained.

The invention discloses a nickel-molybdenum high-dispersity coal tar slurry bed hydrogenation catalyst and a preparation method thereof. The nickel-molybdenum catalyst with high dispersibility, high coke inhibition performance and high hydrogenation activity is synthesized from the composite acid, ammonium heptamolybdate, thiourea and nickel sulfate through a two-step method. The preparation method comprises the following steps: (1) preparing a composite acid solution according to the mass ratio of concentrated acid A to concentrated acid B under the condition of cold bath, and preparing a dilute acid solution with the pH value of 1-4 by adopting the composite acid solution and deionized water; and (2) adding ammonium heptamolybdate, thiourea and nickel sulfate into the dilute acid solution, reacting at room temperature for 6-15 hours, and then reacting in a hydrothermal kettle at 180-200 DEG C for 24-36 hours. And (3) after the reaction is completed, taking out the hydrothermal reaction kettle, naturally cooling to room temperature, opening the reaction kettle, taking out a black reaction product, standing and centrifuging to obtain a solid product, and drying for 1 hour at 110 DEG C under a vacuum condition to obtain the high-dispersity NiMoSx catalyst.

The invention discloses a method for preparing a plasticizer for an automobile rubber shock pad, and relates to the technical field of plasticizers for automobiles. The method comprises the following steps: by taking solvent extract oil in an extraction tower as a raw material, carrying out hydrofining at 200-240 DEG C by adopting a hydrotreating resin catalyst, and carrying out reduced pressure distillation on the hydrogenated oil to obtain the rubber plasticizer for the rubber shock pad. The hydrotreating resin catalyst is obtained through reaction of aminophosphonic acid resin / nickel, 2, 3-ethylene oxide dicarboxylic acid palladium and 4, 4 '-diaminobiphenyl-2, 2'-dicarboxylic acid palladium. The resin immobilized palladium / nickel catalyst adopted in the method has good stability and reusability, the loss and cost of the catalyst can be reduced, the dispersity and stability of the catalyst are enhanced, the catalytic effect is improved, the hydrogenation reaction of the solvent extract oil is promoted, and the hydrogenation yield is improved.

The application discloses a hydrogenation catalyst, a preparation method and application thereof. The catalyst comprises a sulfided hydrogenation catalyst and a complex of auxiliary metals Fe and Mn, wherein the complex of auxiliary metals Fe and Mn contains two or more amine groups and / or imine groups. The preparation method of the hydrogenation catalyst comprises the following steps: (1) preparing a sulfided hydrogenation catalyst; (2) preparing an impregnation solution by mixing a Fe source and a Mn source with a complexing agent; and (3) impregnating the sulfided hydrogenation catalyst in step (1) with the impregnation solution in step (2), and drying to obtain the hydrogenation catalyst. The catalyst can realize reverse conversion of carbon deposition precursors to a certain extent, and is particularly suitable for a hydrogenation treatment process of secondary processing oil containing relatively high unsaturated hydrocarbons.

The invention relates to the field of petroleum refining and discloses a hydrogenation catalyst as well as a preparation method and application thereof. The hydrogenation catalyst comprises a carrier, an active component and N-graphdiyne, wherein the active component is loaded on the carrier, and the N-graphdiyne is loaded on the carrier or mixed in the carrier; the carrier comprises an aluminum oxide-lanthanum oxide-titanium oxide composite carrier; the active components are selected from sulfides of at least two of metal M; the metal M is selected from a VIII group and a VIB group; on the basis of the total mass of the hydrogenation catalyst, the content of N-graphdiyne in the hydrogenation catalyst is 0.1-5 wt%. According to the hydrogenation catalyst, an aluminum oxide-lanthanum oxide-titanium oxide composite carrier is used as a composite carrier, N-graphdiyne is introduced, and the hydrogenation catalyst has high hydrodesulfurization and denitrification activity.

The invention discloses a catalyst for preparing succinic acid through maleic acid water phase hydrogenation as well as preparation and application of the catalyst. The catalyst comprises a carrier and an active metal, the carrier is a titanium dioxide carrier containing an auxiliary agent, and the auxiliary agent is selected from at least one of La, Ga, Re, Mo, In, Ni and Mn. When the catalyst is used for preparing succinic acid through maleic acid water phase hydrogenation, the catalyst has the advantages of being high in succinic acid yield and good in stability.