32 results about "Titanium zirconium" patented technology

The application discloses a disinfection and sterilization functional resin master batch, a preparation method and application. The disinfection and sterilization functional resin master batch comprises a disinfection and sterilization functional material, is prepared by adopting resin slices and the disinfection and sterilization functional material to melt and mix and form, the resin slice material is selected from at least one of PET polyester, PP propylene, PS polystyrene and PA6 nylon, and the disinfection and sterilization functional material is a porous inorganic titanium zirconium phosphate functional material. The porous inorganic titanium zirconium phosphate functional material in the disinfection and sterilization functional resin master batch prepared by the method is uniformly distributed, and the porous inorganic titanium zirconium phosphate functional material on the surface of resin fibers or non-woven fabric fibers prepared by adopting the functional resin master batch is uniformly distributed. The disinfection and sterilization functional resin master batch can be used for producing disinfection and sterilization resin fibers, non-woven fabrics, air conditioner water tanks, air conditioner evaporation tanks, air conditioner shells, injection molding keys, remote controller shells and the like.

The application discloses the technical field of waste gas purification catalyst regeneration, and discloses a regeneration process of a low-temperature SCR denitration catalyst; the process comprises the following steps: after the deactivated catalyst is cleaned through ultrasonic cleaning, the deactivated catalyst is sequentially immersed in a chemical activation liquid and an oxidation treatment liquid for activation and oxidation treatment, then the deactivated catalyst is immersed in a water dispersion liquid containing tungsten-silicon heteropoly acid-zirconium titanium composite oxide core-shell structure material and polyvinylpyrrolidone, vacuum-assisted impregnation, drying and gradient temperature heat treatment are carried out, and a regenerated catalyst is obtained. The core-shell structure material is prepared by the following steps: synthesizing a titanium zirconium composite oxide carrier through a sol-gel method, loading cerium manganese active components through a coprecipitation method, modifying silicotungstic acid through a layer-by-layer self-assembly technology and surface silanization modification. The regenerated catalyst has the advantages of significant improvement in sulfur resistance and alkali metal poisoning resistance, simple process operation, low energy consumption and suitability for industrial application.

The present application provides a compound used as a coating agent for providing a particle having excellent dispersibility and refractive index, a particle having a surface coated with the compound, a production method thereof, and a dispersion composition containing the particle. The compound according to the present application has a structure represented by Formula (1). In the formula, R 1 represents an organic group having 1 to 30 carbon atoms, R 2 represents OR 3 or a group represented by Formula (2), R 3 represents an organic group having 1 to 30 carbon atoms, n1 and n2 represent an integer of 0 or more, n1 + 2 x n2 represents a valence number determined by the kind of L, L represents aluminum, gallium, yttrium, titanium, zirconium, hafnium, bismuth, tin, vanadium, or tantalum, * represents a bonding site, and R 4 and R 5 represent an organic group having 1 to 30 carbon atoms which can have an oxygen atom. The particle according to the present application has a structure represented by Formula (1) on the surface.

This application provides a method for deep removal of calcium impurities from scandium oxide, belonging to the field of rare earth metal oxide purification. The method includes: dissolving scandium oxide raw material containing calcium impurities to obtain a calcium-containing scandium solution; adding a pH adjuster to the calcium-containing scandium solution to obtain a first scandium solution; reacting the first scandium solution with phosphoric acid and / or phosphate to obtain a second scandium solution and solid calcium phosphate; reacting the second scandium solution with a complexing agent to obtain a third scandium solution; reacting the third scandium solution with oxalic acid and / or sodium oxalate to obtain scandium oxalate crystals and a calcium complex solution; adding a strong acid solution to the calcium complex solution; and calcining the scandium oxalate crystals to obtain scandium oxide. Through calcium phosphate precipitation-complexation-crystallization, not only can calcium impurities be deeply removed from scandium oxide products, but impurities such as iron, titanium, and zirconium can also be removed, resulting in scandium oxide products with a purity of over 99.99%.

The application belongs to the technical field of solid electrolyte, and particularly relates to a method for preparing a cation-nitrogen co-doped LLZO electrolyte ceramic film by one-step method. In view of the problems of complicated process, high cost and difficulty in industrialization of the existing electrolyte, the application provides a one-step sintering preparation scheme, and the obtained electrolyte is abbreviated as LLZO-MN, M is one or more of aluminum, gallium, indium, iron, titanium, zirconium and copper, metal nitride is used as a doping source, conventional lithium source, lanthanum source and zirconium source are matched, and after ball milling and die pressing, a segmented temperature control one-step sintering process is adopted to prepare in an air atmosphere, so that the secondary treatment process of traditional two-step sintering is saved; the metal M and N³ ‑ A Li-M-O-N synergistic coordination structure is formed in the crystal lattice, and no impurity phase is generated. The process is simple, the preparation cost is low, the original crystal structure is not damaged after doping, the interface reaction can be optimized, the lithium ion conductivity can be improved, the electrolyte has high density and uniform doping, and is suitable for solid-state lithium metal batteries and other energy storage devices.

The application discloses a multi-principal element alloy and a preparation method and application thereof, and comprises the following components calculated in terms of atomic percentage: 28-37% of zirconium, 18-26% of hafnium, 9-14% of tantalum, and the balance of titanium and inevitable impurities. By setting the atomic percentages of titanium (Ti), zirconium (Zr), hafnium (Hf) and tantalum (Ta) within the range of the application, the multi-principal element alloy provided by the application has low elastic modulus and high plasticity. The multi-principal element alloy of the application is composed of non-biologically toxic elements Ti, Zr, Hf and Ta, and has excellent biocompatibility.

The application discloses a kind of gradient composite modified marine corrosion-resistant aluminum alloy cable conductor materials and production method thereof, belong to wire and cable material technical field.The method includes: in 6 or 7 aluminum alloy matrix, add 0.1%~0.5% rare earth element yttrium, cerium and 0.05%~0.2% zirconium, titanium carries out multielement microalloying, adds 1.5%~2.5% zinc and 0.5%~1.0% magnesium constructs sacrificial anode phase, dopes 1.5%~2.5% nano graphene oxide / nanosilicon carbide fills micro-pore;Conductor surface layer is treated by chromium-free passivation by titanium zirconium composite passivation solution, and then the inorganic-organic gradient coating of "silicon oxide-aluminum oxide ceramic bottom layer+fluorocarbon resin surface layer" is constructed;By component segregation control, the core-surface dual-function gradient structure of core high-conductivity aluminum alloy matrix and surface corrosion-resistant strengthening layer is formed.The application is significantly improved by multidimensional composite modification design, the corrosion resistance and long-term service life of aluminum alloy cable conductor in marine high-salt fog environment, conductivity is greater than or equal to 62% IACS, no visible corrosion in salt spray 2000h, service life is more than 30 years.

The application discloses a titanium-zirconium alloy dental implant and a manufacturing method thereof, and belongs to the technical field of biological medical device manufacturing. Three supporting feet are uniformly arranged on the circumference of the small-diameter end of the conical tube along the generatrix direction, which not only ensures the area and stability of the contact between the implant and the jaw bone, but also is beneficial to the growth and tightness of the bone tissue. The hollow tubular structure of the implant body has more than 50% higher bending deformation resistance than the solid columnar structure, effectively ensures the stability of the implant when biting food, and prevents the implant from loosening caused by micro-deformation. The crown base is an important bearing part of the implanted tooth, and in the process of food biting and chewing, the crown body transmits the biting force to the implant body and the jaw bone through the pile of the crown body base. The side wall of the circular table cooperates with the inner hole wall of the large-diameter end of the conical tube, and the convex rib cooperates with the groove, so as to realize the positioning of the crown base and prevent the displacement of the crown base in the circumferential direction.

This invention discloses a lightweight, structurally and functionally integrated high-entropy alloy based on the U-Mo-Nb-Ti system, containing uranium. It belongs to the field of high-entropy alloy materials. The alloy composition is: uranium: 15-60%; molybdenum: 10-35%; niobium: 10-35%; titanium: 15-50%; zirconium: 0.1-10%; aluminum: 0.01-10%, with the balance being unavoidable impurities. Currently, research on the microstructure stability, tensile strength, and radiation embrittlement resistance of MoNbTi alloys under high temperature and irradiation environments is almost nonexistent. Furthermore, other studies have not given sufficient attention to U-containing high-entropy alloy fuels. This invention proposes a lightweight, high-entropy alloy based on the U-Mo-Nb-Ti system, fully considering the special role of uranium, thereby achieving structural and functional integration in the high-entropy alloy.

The application discloses a high-strength corrosion-resistant aluminum-based alloy material and a smelting method thereof. The aluminum-based alloy material takes aluminum as a matrix, and precisely limits the trace proportion of zinc, magnesium, copper, manganese, titanium, zirconium and yttrium. Through a multi-element trace alloy synergistic strengthening mechanism, the grain is refined, the grain boundary is purified, and the corrosion primary cell generation is inhibited. The smelting method adopts a process of segmented temperature rising melting, composite refining, gradient static setting impurity removal and inert gas protection, and effectively eliminates the melt pores, oxidation inclusions and defects. The alloy has a tensile strength of greater than or equal to 620 MPa, and a salt mist corrosion resistance life which is more than 45% higher than that of a traditional 7-series aluminum alloy. Meanwhile, the excellent processing performance is reserved. The technical problem of poor high-strength aluminum-based alloy corrosion resistance matching is solved, and the application value in engineering is extremely high.

The application provides a hydrogenation catalyst applied to preparation of 1,4-butanediol by hydrogenation of 1,4-butynediol, the hydrogenation catalyst comprising nickel, aluminum, a first promoting component and a second promoting component, the hydrogenation catalyst being in a granular shape; the first promoting component comprising a first metal component, the second promoting component comprising a second metal component, the first metal component comprising at least one of platinum, ruthenium, molybdenum, titanium, zirconium, copper, iron, chromium, cobalt, niobium, manganese, boron, bismuth, tungsten and germanium, and the second metal component comprising at least one of lanthanide metal elements; the content of the nickel being 40-80% by weight percentage of the hydrogenation catalyst, the content of the aluminum being 20-60% by weight percentage of the hydrogenation catalyst, the content of the first promoting component being less than or equal to 10% by weight percentage of the hydrogenation catalyst, and the content of the second promoting component being less than or equal to 10% by weight percentage of the hydrogenation catalyst. The application solves the problem of high content of methyl BDO in preparation of 1,4-butanediol by hydrogenation of 1,4-butynediol. The application also provides a preparation method of the hydrogenation catalyst and application thereof.

The invention relates to a flame hydrolysis process for producing metal and / or metalloid oxides by means of a burner having a burner head with at least two gas channels and an outlet end, wherein the metal or metalloid oxide is selected from the group consisting of oxides of aluminum (Al), titanium (Ti), zirconium (Zr), yttrium (Y), lithium (Li), magnesium (Mg), lanthanum (La), cerium (Ce), iron (Fe), zinc (Zn) and silicon (Si) or mixtures thereof, the process comprising the steps of providing an oxygen-containing gas, a fuel gas and a gaseous metal precursor and / or a mixture containing a gaseous metal precursor to the burner head, providing a flame by combusting at least a portion of the oxygen-containing gas and the fuel gas at the outlet end of the burner head, releasing the MP and / or the MP-containing mixture into the provided flame, and providing gaseous ammonia (NH3) and / or a gaseous mixture containing ammonia (NH3) in at least one gas channel to the outlet end of the burner head and releasing the gaseous ammonia into the flame, and wherein ammonia (NH3) is not pre-mixed with the metal precursor before the outlet end of the burner head.

This invention belongs to the field of sodium-ion batteries, specifically relating to the negative electrode sheet, preparation method, and battery of a negative electrodeless sodium battery. The negative electrode sheet includes a composite current collector and a stacked gradient alloy layer. The composite current collector includes a polymer layer and a stacked metal layer, with the metal layer in direct contact with the gradient alloy layer. From the side in contact with the metal layer to the side away from the metal layer, the content of the first alloy composed of titanium-tungsten alloy, nickel-cobalt alloy, or titanium-zirconium alloy decreases linearly, while the content of the second alloy composed of titanium-bismuth alloy, titanium-tin alloy, or titanium-zinc alloy increases linearly. The content of the first alloy on the side in contact with the metal layer is 80wt%~100wt%, and the content of the second alloy on the side away from the metal layer is 60wt%~80wt%. The mass ratio of the two metals in the first alloy is (6~8):(2~4), and the mass ratio of the two metals in the second alloy is (7~9):(1~3). The battery has high energy density, high cycle capacity retention, high rate performance, and low short-circuit risk.

The application relates to a preparation method of a ZrO2 reinforced TiZrNbTaCu high-entropy alloy, specifically to introducing an antibacterial element copper into a TiZrNbTa base body, and preparing the ZrO2 reinforced TiZrNbTaCu high-entropy alloy through high-energy ball milling and spark plasma sintering. The atomic ratio of titanium powder, zirconium powder, niobium powder and tantalum powder is 1-5:1:1:1, the mass ratio of copper powder and TiZrNbTa powder is 3-7:97-93, and the mass ratio of stearic acid and titanium-zirconium-niobium-tantalum-copper powder is 0.05-1.5:100. The ZrO2 reinforced TiZrNbTaCu high-entropy alloy prepared by the application has the integrated characteristics of low modulus, high strength, high wear resistance, strong antibacterial property and good biocompatibility, and is a very potential hard tissue repair substitute material.

The present application relates to a controllable morphology entropy-stable high-entropy oxide powder and a low-temperature high-pressure preparation method thereof. By selecting magnesium, cobalt, nickel, copper, zinc, strontium, lanthanum, chromium, iron, manganese, titanium, zirconium, gadolinium and other metal elements, the entropy-stable single-phase high-entropy oxide powder with rock salt, perovskite or fluorite structure can be synthesized under the condition far below the normal pressure phase transition temperature by using 10-300 MPa pressure assisted reaction. The method is based on the precursor morphology control, combined with the high-pressure atmosphere reaction kettle in a specific atmosphere for 0.5-24 hours of heat preservation, successfully overcomes the problem that the traditional pressureless or static pressure sintering is difficult to realize high phase purity and controllable morphology at the same time, and obtains the monodisperse and uniform structure powder. The process has the advantages of low temperature, low energy consumption, easy scaling and the like, and the obtained powder has excellent performance and can meet the application requirements in many fields.

The utility model discloses a kind of titanium zirconium ore processing is with drying furnace waste gas treatment device, it is related to waste gas treatment field.A kind of titanium zirconium ore processing is with drying furnace waste gas treatment device, including fixed ring, further include: rotation is connected on the fixed ring on drum, wherein, zeolite molecular sieve cylinder is arranged in the drum, exhaust hole is opened on the drum;Collecting bin, detachably connected on one end of the drum;The utility model, through drum drive zeolite molecular sieve cylinder rotation, increase waste gas and molecular sieve contact area and time, strengthen purification effect, speed up filtration speed;Electric telescopic link drive sealing plug reciprocating sliding, both can compress space and accelerate gas and molecular sieve contact, further promote filtration efficiency, can also automatically clean the particulate matter in drum, prevent in the process of filtering and purifying waste gas, more particulate matter is accumulated in drum, affect the efficiency of zeolite molecular sieve cylinder to waste gas filtration, purification.

A composite material includes: a first member containing tungsten as a primary component; a second member containing copper as a primary component, the second member being joined to the first member; and a metal containing at least one metal selected from a group consisting of titanium, zirconium, and hafnium, the metal being present in the second member, wherein a concentration of the metal is more than 0 atomic % and less than or equal to 5.0 atomic % at a location of 5 μm from a joining interface between the first member and the second member toward the second member side.

A composition is described comprising a polydiorganosiloxane; a silver material; and at least 1% by weight of an oxygen-containing metal filler of silicone, titanium, zirconium, or combinations thereof. The crosslinked composition may have a higher tensile strength than the same composition without the oxygen-containing metal filler. In some embodiments, the polydiorganosiloxane comprises a nonfunctional polydiorganosiloxane. In another embodiment, a method of manufacturing an adhesive article is described, comprising providing a layer of a polydiorganosiloxane composition on a substrate (e.g., a release liner), wherein the layer comprises a nonfunctionalized polydiorganosiloxane and a silver material; and subjecting the layer of the polydiorganosiloxane composition to radiation treatment, thereby crosslinking the layer of the polydiorganosiloxane composition.

The present application relates to a kind of low-temperature SCR denitration catalysts for preventing ammonia escape and its preparation method, belong to catalyst technical field.The catalyst with niobium cerium composite oxide as active component (25~45%), titanium zirconium composite oxide as carrier (50~70%), add lignin-derived carbon microspheres modified bismuth molybdate as additive (3~7%), graphene quantum dots are structure reinforcing agent (0.5~2%, particle size 2~5nm), the powder of sesbania grandiflora as binder (1.5~2%).Additive is prepared by microsphere by alkali lignin and formaldehyde, phenol reaction, after carbonization, nitric acid treatment and bismuth molybdate compound.The preparation, active component, carrier and graphene quantum dots are prepared first, then mixed in proportion and add binder, calcination is obtained after granulation forming catalyst.The catalyst has high specific surface area and specific pore size distribution, can effectively improve low-temperature denitration efficiency and prevent ammonia escape, suitable for industrial low-temperature flue gas denitration treatment.

This invention discloses a polytitanium zirconium silicate-chitosan composite flocculant, its preparation method, and its application, relating to the field of environmental technology. The method includes the following steps: Step 1, preparation of chitosan acetic acid solution: Chitosan is dissolved in a dilute acetic acid solution to obtain a chitosan acetic acid solution; Step 2, preparation of the polytitanium zirconium silicate-chitosan composite flocculant: Under water bath conditions, the chitosan acetic acid solution is added to a polytitanium zirconium silicate salt solution, and the mixture is stirred and polymerized uniformly. The pH value of the solution is adjusted, and the polymerization is continued with stirring until it matures, thus obtaining the polytitanium zirconium silicate-chitosan composite flocculant. The composite flocculant of this invention achieves a turbidity and organic matter removal rate of over 90%, realizing the synergistic effect of inorganic and natural polymers. It has advantages such as low dosage, high removal efficiency, and environmental friendliness, providing a novel and efficient technical solution for drinking water pretreatment, urban sewage, and industrial wastewater treatment, and has significant theoretical value and engineering application prospects.

Coating compositions comprising a film-forming polymer formed a reaction mixture comprising a catalytic system are disclosed. The catalytic system comprises a first catalyst, comprising titanium, zirconium, or combinations thereof, and a second catalyst comprising bismuth, aluminum, zirconium, or combinations thereof, wherein the metal in the first catalyst is different from the metal in the second catalyst. A method for coating at least a portion of a substrate with said coating compositions is also disclosed. Furthermore, articles coated, at least in part, with said coating compositions are disclosed.

This invention belongs to the field of ceramic preparation technology and provides a hot-pressed sintered multiphase boron carbide ceramic and its preparation method. The ceramic is based on boron carbide, with the addition of high-entropy diboride phases containing titanium, zirconium, hafnium, niobium, tungsten, and molybdenum, as well as a carbon phase. The ceramic may further contain corresponding high-entropy carbides. In the preparation process, multi-metal powder, amorphous boron powder, cobalt powder, and a process control agent are first subjected to high-energy ball milling and heat treatment under an inert atmosphere to obtain high-entropy diborides. Then, nanodiamond and cobalt powder are dispersed in ethanol, followed by ultrasonication, drying, and heat treatment to obtain the carbon phase. Subsequently, this carbon phase is mixed with boron carbide and granulated to obtain composite particle powder. Finally, it is hot-pressed and sintered in segments under vacuum conditions, with pressure pulses and pressure relief cycles applied during the high-temperature stage to obtain a dense multiphase ceramic, which can be applied to ceramic valves and ceramic cylinder valve plates.

This invention relates to the field of piezoelectric materials and discloses a method for preparing a high-fatigue-resistant lead-free piezoelectric thin film. The method uses magnetron sputtering to directly prepare a lead-free piezoelectric thin film with a top electrode. The thin film layer of the lead-free piezoelectric thin film is a pure-phase potassium sodium niobate ceramic. An adhesive layer is disposed between the pure-phase potassium sodium niobate and the top electrode layer. The sputtering target for the adhesive layer is one or more of titanium, zirconium, ruthenium, titanium oxide, ruthenium oxide, and lanthanum nickelate. During the annealing process, the adhesive layer undergoes oxidation to form an oxide layer, which significantly improves the adhesion of the adhesive layer to the top electrode layer. The adhesive layer also significantly inhibits the volatilization of alkali metal elements in the thin film layer and significantly improves the fatigue resistance of the potassium sodium niobate thin film. The lead-free piezoelectric thin film prepared by this method exhibits high fatigue resistance at 10°C. 8 After the second electrical fatigue cycle, the residual polarization showed no significant decay.

The application discloses a method for synthesizing diethylene glycol bis(2-ethylhexanoate), and belongs to the technical field of fine chemical synthesis. The method uses diethylene glycol and 2-ethylhexanoic acid as raw materials, uses a composite solid acid of titanium-zirconium bimetallic oxide loaded with sulfate as a catalyst, adjusts the internal temperature of the reaction by using a feedback segmented temperature rising control strategy based on the real-time change of the cumulative water production of a water segregator, recovers the catalyst by adsorption under an applied magnetic field after the reaction is completed, and obtains the target product after neutralization by alkali liquor, water washing, decolorization by activated bleaching earth and filtration. The method has the characteristics of high acid site density of the catalyst, dynamic matching of the internal temperature of the reaction and the progress of the reaction, convenient magnetic separation and recovery of the catalyst, and good cyclic stability of the catalyst, and the obtained product has the characteristics of light color, low acid value and high purity, and is suitable for industrialized continuous production of diethylene glycol bis(2-ethylhexanoate).

This invention relates to the field of alloy materials technology, specifically to a method for preparing nickel-chromium-silicon-manganese alloy foil, comprising the following steps: S1: alloy ingot preparation; S2: hot-rolled slab preparation; S3: preliminary foil preparation; S4: nickel-chromium-silicon-manganese alloy foil preparation. In this invention, by rationally combining nickel, chromium, silicon, and manganese, nickel and chromium form a stable nickel-chromium solid solution to solidify the foundation against high-temperature oxidation; silicon combines with oxygen to form a dense silicon oxide protective film; manganese synergistically refines the oxide film structure to reduce film cracking; combined with the effects of titanium, zirconium, hafnium, and composite powder in the composite additives, both the adhesion between the oxide film and the substrate is enhanced, and the oxide film peeling off at high temperatures is inhibited. The erbium and nano-silicon carbide in the pretreated composite powder further improve the stability of the oxide film, synergistically delaying the high-temperature oxidation rate with the alloy base components, effectively improving the high-temperature oxidation resistance of the alloy foil and extending its service life under high-temperature conditions.

A reflective mask blank includes a substrate, a multilayer reflective film formed on the substrate, a protective film formed on the multilayer reflective film, and an absorber film formed on the protective film. The protective film includes ruthenium (Ru), rhodium (Rh), and one or more additive elements selected from a group consisting of titanium (Ti), zirconium (Zr), yttrium (Y), niobium (Nb), vanadium (V), and hafnium (Hf), and a content of the one or more additive element on a multilayer reflective film side of the protective film is larger than a content of the one or more additive element on an absorber film side of the protective film.

Provided is an all-solid-state battery comprising: a positive electrode layer comprising a positive electrode current collector and a positive electrode active material layer on the positive electrode current collector; a negative electrode layer comprising a negative electrode current collector and a negative electrode coating layer on the negative electrode current collector; a solid electrolyte layer disposed between the positive electrode active material layer and the negative electrode coating layer and including a sulfide-based solid electrolyte; and an interlayer disposed on at least one surface of the solid electrolyte layer, wherein the interlayer contains a metal element (M1), and M1 includes at least one among molybdenum (Mo), titanium (Ti), zirconium (Zr), copper (Cu), and iron (Fe).

In a first aspect, a process is described for forming an article, wherein the article includes an inorganic substrate and a polymer film layer. The inorganic substrate includes a material including a ceramic, a glass, a glass-ceramic or a mixture thereof. The material includes a metal cation selected from silicon, aluminum, titanium, zirconium, tantalum, niobium and mixtures thereof, and oxygen. The polymer film layer includes a polymer comprising an imide group. The process includes: (a) applying an amine reagent to a surface of the inorganic substrate, a surface of the polymer film layer, or both; (b) contacting the inorganic substrate with the polymer film layer, such that a surface having an amine reagent is at an interface between the inorganic substrate and the polymer film layer; and (c) applying heat and pressure to the article.

This invention discloses a method for preparing a catalyst for the one-step preparation of methacrylonitrile from n-propionaldehyde. The catalyst obtained by this method, under the combined action of carbon dioxide, water vapor, and ammonia, converts n-propionaldehyde into methacrylonitrile in one step. The catalyst is an acidic oxide containing iron and manganese, with a composition of FeM... x Q y Mn z X a P m O n Where M and Q refer to one or more of vanadium, chromium, cobalt, molybdenum, niobium, tungsten, etc., and X refers to one or more of magnesium, aluminum, titanium, zirconium, etc. Compared with other methods, this method can obtain methacrylonitrile from n-propionaldehyde in one step, while consuming CO2, and has great industrial application value and prospects.