70 results about "Ammonium molybdate" patented technology

This application relates to the field of cable materials, specifically disclosing a low-smoke, low-halogen polyvinyl chloride (PVC) cable material and its preparation method. The material includes the following raw materials: polyvinyl chloride resin, EVM500 rubber, heat stabilizer, antioxidant, plasticizer, lubricant, filler, flame retardant, flame retardant synergist, and acrylate processing aids. The flame retardant includes a mixture of aluminum hydroxide and magnesium hydroxide, and the flame retardant synergist includes a zinc borate and ammonium octamolate-sepiolite composite. The preparation method includes the following steps: mixing the raw materials according to a specified ratio, then melting and mixing them, followed by granulation and extrusion molding to obtain the low-smoke, low-halogen PVC cable material. This application alleviates the problem of traditional PVC cable materials producing large amounts of black smoke and toxic gases during combustion, reduces smoke density, and improves the material's environmental performance and flame retardant properties.

The application discloses a method for producing formaldehyde at low temperature, and belongs to the technical field of formaldehyde production. The method comprises the following steps: preparing a high-efficiency catalyst by taking iron nitrate nonahydrate, ammonium molybdate tetrahydrate and lithium hydride as raw materials; feeding mixed gas of methanol and air into a reactor filled with the high-efficiency catalyst under the condition that the temperature is 250-280 DEG C; and collecting gas at the outlet of the reactor to complete the method for producing formaldehyde at low temperature. The embedding of lithium can expand the crystal lattices of the catalytic products, thereby generating a large number of oxygen vacancies, enhancing the electron-donating capacity, and enabling the adsorption of p-formaldehyde to be quickly dissociated and the active sites to be quickly reduced at a relatively low temperature, so that the activity of subsequent catalysis is ensured. The plasma treatment can increase the surface area and the number of active sites of the high-efficiency catalyst, and further improve the catalytic activity. The method for producing formaldehyde at low temperature can improve the conversion rate of methanol and the yield of formaldehyde at a relatively low temperature, and is helpful to reduce energy consumption and reduce the volatilization of Mo.

This utility model discloses an acid precipitation reactor for the preparation of ammonium molybdate, including an acid precipitation reactor body and a top cover. The top cover is disposed on the acid precipitation reactor body, and a fixing frame is disposed on the top cover. A reciprocating drive mechanism is disposed on the fixing frame, and a support is disposed on the moving end of the reciprocating drive mechanism. A drive control component is disposed on the support. This utility model relates to the field of ammonium molybdate preparation technology. The reciprocating drive mechanism realizes the reciprocating adjustment control of the support in the vertical direction, thereby realizing the vertical movement control of the hollow shaft tube and the stirring shaft. At the same time, the drive control component realizes the rotation control of the hollow shaft tube and the stirring shaft, which can realize the reverse rotation of the first stirring blade and the second stirring blade, effectively increasing the stirring operation coverage area, improving the uniformity of mixing, accelerating the acid precipitation reaction rate in the ammonium molybdate preparation process, and improving production efficiency.

This invention discloses an anaerobic biodegradable masterbatch for cast film of sanitary materials, characterized in that its main components, by mass percentage, include: 0.5-3% cypermethrin, 3-6% copper sulfate, 0.1-0.5% metal inorganic salt coating agent, 1-4% ammonium molybdate, 5-10% PLA, 5-10% nano starch, 1-5% carbamide, 7-12% fumed silica, and the balance being a biodegradable resin carrier. The preparation method includes dispersion treatment, centering treatment, structuring treatment, carrier implantation, and plasticizing granulation. The invention also discloses an anaerobic biodegradable cast film for sanitary materials, comprising the following components by mass percentage: 83.4%-97.13% PE-based cast film substrate for sanitary materials, 1-5% PE wax, 1-7.5% degradation masterbatch, 0.15-0.3% dispersant, 0.02-0.2% antioxidant, 0.2-0.6% white oil, 0.5-3% PE grafted maleic anhydride, and 0.2-2% stabilizer. The manufacturing method includes: material preparation, calcium carbonate pretreatment, melting, filtration, and casting. This invention achieves complete anaerobic biodegradation of PE cast leak-proof and breathable films, and also has antibacterial properties during normal use, making it suitable as a breathable film and base film for disposable sanitary materials.

The application discloses a kind of anti-reverse tolerance of poor root flower planting slow-release fertilizer and its preparation method, the slow-release fertilizer includes 30-45 parts of seaweed residue, humic acid 15-25 parts, diatomite 10-20 parts, oyster powder 5-15 parts, plant protein glue 3-8 parts, polyglutamic acid 1-3 parts, bacillus mucilaginosus powder 0.5-2 parts, brown algal oligosaccharide 0.1-0.5 parts, potassium silicate 2-5 parts, ammonium molybdate 0.05-0.15 parts, silicon phytic acid ester 0.5-2 parts, by introducing silicon phytic acid ester, fertilizer particles can be adjusted according to soil humidity release rate of nutrients, lock up nutrients in drought, accelerate release in wet; Absorption and fixation harmful metal ions in soil, reduce stress, and slowly hydrolyze in slow-release process, continuously provide beneficial substances, synergistically improve the fertilizer utilization rate of root flower in poor soil, resistance tolerance and sustained growth capacity.

This invention relates to a method for preparing sodium trimolybdate ammonium monohydrate, characterized in that: (1) ammonium molybdate is dissolved in pure water, and the mass-to-volume ratio of ammonium molybdate to water is controlled at (1-15):50, and stirred evenly; then saturated sodium chloride solution is added to the solution, and the volume ratio of saturated sodium chloride solution to water is controlled at 1:2-5:1; after stirring evenly, 5~95 o C. Let stand for 4-12 days to obtain white flocculent matter; (2) Gently remove the white flocculent matter with a key or glass rod, and wash it by suction filtration or centrifugation. Since sodium trimolybdate monohydrate is water-soluble, it should be washed in small amounts and multiple times; (3) Dry and grind the washed white flocculent matter to obtain sodium trimolybdate monohydrate. Advantages of the present invention: The content of sodium trimolybdate monohydrate obtained is 92-98%, and the yield is 95-99%. The adsorption rate of sodium trimolybdate monohydrate on wastewater containing basic fuchsin and methylene blue is as high as 80% or more.

This invention discloses a method for preparing a nano-zinc sulfide composite material, comprising: (1) dissolving ammonium molybdate in deionized water, stirring evenly to form a 50 g / L solution, then sequentially adding zinc acetate and thiourea, wherein the mass ratio of ammonium molybdate to zinc acetate and thiourea is 2:1, and stirring thoroughly to obtain a mixed solution; (2) transferring the obtained mixed solution to a reaction vessel, reacting at a constant temperature of 160℃ for 12 h, and obtaining a solid powder after treatment; (3) heat-treating at 300-400℃ for 2 h to obtain the nano-zinc sulfide composite material. This invention synthesizes zinc sulfide nanomaterials with different sizes and morphologies, while molybdenum dioxide nanoparticles modify the surface of zinc sulfide. The two work synergistically to have heterogeneous structural characteristics that promote and accelerate electron transport. Using them as electrode materials for electrochemical detection of nicotine and the metabolite cotinine content in cigarettes shows potential application advantages.

This invention relates to a laser-engravable high-gloss black coating for automotive taillights and its preparation method, belonging to the field of coating preparation technology. The formulation of the laser-engravable high-gloss black coating is as follows (by weight): 40-60 parts polyurethane acrylate, 3-5 parts modified nano-bismuth oxide, 3-5 parts trimethylolpropane triacrylate, 1-3 parts 4-methylbenzophenone, 1-2 parts carbon black, and 0.5-1.5 parts leveling agent. The modified nano-bismuth oxide is prepared by treatment with ammonium molybdate solution and grafting with a silane coupling agent. Its layered structure synergistically enhances UV absorption efficiency and weather resistance with the molybdate layer. 4-methylbenzophenone and modified nano-bismuth oxide form a light absorption composite system, which, combined with the high cross-linking density network constructed by trimethylolpropane triacrylate, achieves narrow linewidth laser engraving precision. This invention solves the technical problems of low laser engraving precision, poor adhesion, and insufficient solvent resistance in traditional high-gloss black coatings, and is particularly suitable for precision marking applications such as automotive taillights.

This invention discloses a method for modifying lithium manganese iron phosphate (LFP) cathode materials coated with MoS2 / NiO / TiO2. The first step involves preparing a precursor, nickel hydroxide. Nickel nitrate, sodium hydroxide, ammonium molybdate, and thiourea are mixed and stirred uniformly, then reacted in a polytetrafluoroethylene (PTFE) hydrothermal reactor to obtain MoS2 and NiO solid particles. The second step involves mixing MoS2, NiO, and tetrabutyl titanate uniformly, then adding potassium chloride and allowing the mixture to stand to obtain MoS2 / NiO / TiO2 composite particles. Finally, these composite particles are mixed with LFP particles and stirred to obtain the MoS2 / NiO / TiO2 coated LFP cathode material. The modified LFP exhibits increased conductivity, significantly improved specific capacity, rate performance, and stability. Its initial charge-discharge specific capacity reaches 153.8–156.7 mAh / g, and its specific capacity at 2C rate reaches 132.4–140.0 mAh / g. The modification method used in this invention has a simple preparation process and is the first to achieve the goal of improving electrical performance by constructing a MoS2 / NiO / TiO2 composite material on the surface of lithium manganese iron phosphate.

This invention discloses a molybdenum phosphide quantum dot-embedded polyaniline-derived hollow sphere hard carbon composite material and its preparation method. The preparation method includes the following steps: (1) preparing polyaniline hollow spheres using aniline, hydrogen peroxide, anhydrous ferric chloride, and phosphoric acid aqueous solution as raw materials via a hydrothermal method; (2) immersing the polyaniline hollow spheres in concentrated hydrochloric acid, drying them, and then performing a secondary hydrothermal treatment with ammonium molybdate tetrahydrate and ammonium dihydrogen phosphate to obtain a precursor; (3) further carbonizing and phosphating the precursor with sodium hypophosphite monohydrate to obtain the molybdenum phosphide quantum dot-embedded polyaniline-derived hollow sphere hard carbon composite material. In this composite material, molybdenum phosphide is embedded in the hard carbon wall of polyaniline hollow spheres with a diameter of 200-300 nm in the form of 2-3 nm quantum dots, accounting for approximately 20-25 wt% by mass. The composite material provided by this invention can be used as an electrode material, and the potassium-ion batteries prepared from it have high specific capacity, good cycle stability, and excellent rate performance. Furthermore, the method provided by this invention has the advantages of simple process, low cost, and large-scale production capability.

The application provides a method for preparing molybdenum carbide / carbon composite nanospheres based on electrostatic spinning technology, which comprises the following steps: adding ammonium molybdate into dimethylformamide, stirring for 2 hours, then adding polyacrylonitrile, and stirring for 6 hours to obtain a spinning solution; loading the spinning solution into a 10 mL syringe for electrostatic spinning to obtain precursor nanospheres Mo@PAN, and placing the precursor nanospheres in a tube furnace for heat treatment to obtain molybdenum carbide / carbon composite nanospheres. The application also provides applications in the fields of electrocatalytic hydrogen evolution, energy storage and coating materials. The molybdenum carbide / carbon composite nanospheres prepared by the method have uniform size distribution and good dispersibility. The spherical structure has good mechanical properties, and can ensure the structural stability of the material in the application process, preventing the microstructure of the material from being damaged. Meanwhile, the nanoscale spherical morphology provides a high specific surface area, which provides more active sites for the material in the applications of catalysis and energy storage, and is beneficial to improving the performance of the material.

The application discloses a saline-alkali soil conditioner suitable for soybean cultivation and an application method thereof. The conditioner is composed of 70% of rotten cow manure, 25% of superphosphoric acid calcium, 5% of ferrous sulfate and 1000 ppm of ammonium molybdate. Through the synergistic effect of "organic fertilization + inorganic salt adjustment + micro-fertilizer synergism", the problems of poor structure, high salt content, strong alkalinity, low fertility and serious nutrient deficiency of the saline-alkali soil are solved simultaneously. In the preparation, the dry-wet mixing combination and medium-temperature fermentation process are adopted, and in the application, the conditioner is applied in stages according to the degree of salinization (0.2-0.6% of the adding amount), and is matched with rotary tillage and water management. The experiment shows that after the application, the soil pH is reduced to 7.0-7.7, the effective molybdenum is increased by 3.5 times, the soybean emergence rate is increased by 22%, and the biomass is increased by 35%. The application is especially suitable for soybean planting in the coastal saline-alkali land with pH of 8.0-9.5, and realizes the synergistic optimization of soil improvement and crop growth.

This invention discloses a composite nano-zinc oxide material for the degradation of organic pollutants in water and its preparation method, belonging to the field of wastewater treatment agent preparation technology. A dispersion is obtained by mixing p-phenylenediamine, terephthalic acid, deionized water, and a mesoporous conditioner. An aqueous solution of zinc chloride is added to the dispersion, and the mixture reacts to obtain a porous polymer material. The porous polymer material is then impregnated in an alkaline solution to obtain zinc hydroxide@porous material. A mixed solution is obtained by mixing and dissolving ammonium molybdate, thiourea, and deionized water. The zinc hydroxide@porous material and the mixed solution are then subjected to a co-heating reaction and calcination to obtain the composite nano-zinc oxide material. This invention prepares a zinc hydroxide@porous material with a porous structure, and then reacts it with a molybdenum disulfide precursor solution to obtain a composite nano-zinc oxide material with good degradation effect on organic pollutants.

The application relates to the technical field of organic fertilizer, and discloses a zinc-rich organic fertilizer and a preparation method thereof, the zinc-rich organic fertilizer comprises the following components in parts by mass: organic base material 40-60 parts, composite zinc source 5-8 parts, composite chelating agent 3-5 parts, functional microbial agent 2-3 parts, magnesium sulfate 0.3-0.5 parts, manganese sulfate 0.2-0.3 parts, boric acid 0.2-0.3 parts, ammonium molybdate 0.1-0.2 parts, slow-release coating agent 2-4 parts and zeolite powder 1-2 parts. The zinc source is chelated by using the composite chelating agent, carboxyl and hydroxyl of modified humic acid in the composite chelating agent and phenolic hydroxyl of tea polyphenol form synergistic chelating sites, so that the chelation rate of the composite chelated zinc is improved, and after being applied to soil, the composite chelated zinc is not easy to combine with calcium carbonate and phosphate to form a difficultly soluble compound, and then the utilization rate of effective zinc is greatly improved.

This disclosure discloses a spectrophotometric detection device and method for total ammonium phosphomolybdate in surface water, comprising: a shell, wherein a filter chamber and a detection chamber are provided inside the shell, a surface water test tube is snapped and fixed inside the filter chamber, a filter structure is slidably fitted inside the filter chamber, the filter structure includes a filter plate, a baffle is fixed to the lower side of the filter plate, a rotating shaft is rotatably fitted inside the filter plate, a stirring structure is installed around the circumference of the rotating shaft, a driving structure is installed inside the shell, and a telescopic connection structure is installed between the driving structure and the rotating shaft. In the spectrophotometric detection device and method for total ammonium phosphomolybdate in surface water of this disclosure, the filter structure is slidably installed inside the filter chamber. Firstly, the surface water can be filtered by activated carbon to ensure the cleanliness of the surface water, thereby preventing the surface water from being too turbid and affecting the light transmission during detection, thus ensuring the accuracy of the experimental results. Furthermore, the phosphorus adsorbed by the activated carbon can be replaced by the eluent, thereby facilitating the detection of total phosphorus.

The application discloses a high-chlorine-resistance NiFe bulk alloy electrolytic seawater oxygen evolution catalyst and a preparation method thereof, and is prepared according to the following steps: (1) placing the bulk NiFe foam alloy in anhydrous ethanol and ultrasonically cleaning; (2) drying the cleaned NiFe foam alloy, and placing the NiFe foam alloy in a hydrochloric acid solution for pickling; (3) placing the pickled NiFe foam alloy into a prepared corrosion solution, and corroding and constructing for 5-20 hours at a corrosion and construction temperature of 20-30 DEG C; the corrosion solution is one of an ammonium tungstate aqueous solution, an ammonium molybdate aqueous solution and an ammonium chromate aqueous solution; (4) taking out the constructed NiFe foam alloy, and rinsing the surface of the NiFe foam alloy with deionized water to obtain the high-chlorine-resistance NiFe bulk alloy electrolytic seawater oxygen evolution catalyst. The application can effectively resist chlorine ion erosion, realizes excellent activity and long-term stability of the NiFe bulk alloy in an oxygen evolution reaction under a large current density, and simultaneously considers low preparation cost.

The application discloses an SCM-IC-1 molecular sieve composite material and a preparation method and application thereof. The SCM-IC-1 molecular sieve composite material comprises a silicon-aluminum porous crystal component, an ammonium phosphomolybdate component and a silicon-based binder component. The SCM-IC-1 molecular sieve composite material provided by the application can be used as an adsorption material for capturing and detecting metal ions in water bodies, especially for cesium ions, and has the technical effects of high capture rate and fast capture rate.

This invention discloses an anode material for hydrogen production via water electrolysis, its preparation method, and its application, belonging to the field of water electrolysis hydrogen production technology. The preparation method includes the following steps: using a three-electrode system, with NiFe layered double hydroxide as the working electrode, Pt as the counter electrode, Hg / HgO as the reference electrode, and ammonium molybdate solution as the electrolyte, applying a constant negative potential to the working electrode, and performing electrochemical Mo doping to obtain the anode material for water electrolysis hydrogen production. The catalytic activity of the anode material for water electrolysis hydrogen production of this invention is significantly improved, while the Tafel slope is reduced, making it suitable for industrial-grade high current density water electrolysis.

This invention discloses a low-temperature, rapid sintering method for preparing sodium molybdenum ceramic targets. Specifically, molybdenum trioxide powder and sodium molybdate dihydrate powder are first mixed using alcohol as a medium through ball milling to obtain a sodium molybdenum slurry. The slurry is then dried, filtered, ground, and sieved to obtain sodium molybdenum powder. The sodium molybdenum powder is then wetted with ammonium molybdate solution. The wetted sodium molybdenum powder is placed in a graphite mold for pre-pressing. The pre-pressed green body is then placed in a sintering furnace along with the graphite mold and subjected to spark plasma-assisted cold sintering at 200℃~400℃ and 50 MPa high pressure to obtain a sintered target body. The sintered body is then mechanically polished and ultrasonically vibrated to obtain a semi-finished target. The semi-finished target and a copper backing plate are brazed together, and after cleaning, drying, and vacuum sealing, the sodium molybdenum ceramic target is obtained. This invention enables the rapid (5 min) sintering of high-purity, high-density sodium molybdenum ceramic targets at low temperatures.

This invention discloses a method for preparing a catalyst for the oxidative dehydrogenation of ethane, comprising the following steps: dissolving ammonium heptamolybdate tetrahydrate, ammonium metavanadate, telluric acid, and a dispersant in deionized water to form a mixed solution; adding an aqueous solution of niobium oxalate to the mixed solution within 15–50 min to form a suspension; then adding an aqueous solution of the template agent polyether P123; and subjecting the process to aging, hydrothermal crystallization, drying, calcination, and removal of the M2 phase to obtain the catalyst for the oxidative dehydrogenation of ethane. This invention introduces a dispersant and the template agent polyether P123 at specific steps in the catalyst preparation process, combined with limiting the time of adding the niobium oxalate aqueous solution to the mixed solution, which effectively improves the pore structure and specific surface area of ​​the catalyst, increases the proportion of high-concentration active sites on its terminal surface, and thus significantly enhances the catalyst's reactivity.

This invention provides a NiMoO4@NiFe(OH) x A hierarchical catalyst, its preparation method, and its application are disclosed. The preparation of the catalyst includes the following steps: removing oil and oxide layers from the surface of nickel foam; dissolving nickel nitrate and ammonium molybdate in deionized water and placing them together with the nickel foam in a high-pressure reactor for hydrothermal reaction to grow NiMoO4 in situ on the nickel foam substrate; after the reaction, cleaning and drying are performed to obtain nickel foam loaded with NiMoO4; immersing it in an iron salt solution to obtain nickel foam loaded with Fe-NiMoO4; immersing it in an alkaline solution, cleaning, and drying are performed to obtain NiMoO4@NiFe(OH). x Hierarchical catalyst. The preparation method of this invention is simple and safe, and can be mass-produced. The prepared catalyst has a three-dimensional hierarchical structure and exhibits excellent catalytic performance and stability in a three-electrode system and an AEMWE electrolyzer.

This invention discloses a method for extracting high-purity ammonium tetramolybdate from a waste oil hydrogenation catalyst. S1, Primary ammonia dissolution: 28% ammonia water, water, and molybdenum acid extracted from the waste oil hydrogenation catalyst are added to a primary dissolution vessel. The mixture is stirred until the molybdenum acid is fully dissolved. The reaction time is controlled to 1 hour. The pH of the dissolved solution is 7-8. The molybdenum acid has a water content of 35% and a Mo content of 46-50%. This invention employs a stepwise deep impurity removal process of "magnesium chloride for phosphorus removal + 231 resin for vanadium removal," and sets up dual phosphorus and vanadium content detection to ensure that phosphorus <0.01g / L and vanadium <0.01g / L before proceeding to subsequent processes. The molybdenum-vanadium separation coefficient of 231 resin is much higher than that of ordinary resin, effectively avoiding impurity entrainment.

The application discloses a kind of high-strength flat plate catalyst and preparation method thereof, it is related to catalyst technical field.The technical scheme is as follows: including the following mass fraction components: titanium dioxide 50-80 parts, high-viscosity kaolin 2-15 parts, glass fiber 2-10 parts, carbon fiber 2-10 parts, plasticizer 2-15 parts, ammonium heptamolybdate 0.5-2 parts, ammonium metavanadate 0.5-2 parts and water 10-30 parts.The high-viscosity kaolin is prepared, and then combined with the subsequent high-temperature coating process, the adhesion between the catalyst mud and the stainless steel screen plate is greatly improved, thereby enhancing the stability of the catalyst, prolonging the service life of the catalyst and improving the catalytic reaction efficiency.

The patent discloses a preparation method of Mo-V-Sb-Na-O composite oxide catalyst and application of the Mo-V-Sb-Na-O composite oxide catalyst in a reaction of preparing acrylic acid from propylene aldehyde, and comprises the following steps: using a solvent evaporation method to prepare a Mo-V series catalyst, dissolving ammonium heptamolybdate, ammonium metavanadate and antimony trioxide in deionized water and uniformly mixing under rapid stirring, and drying and calcining the mixed liquid to obtain a high-activity catalyst for selectively oxidizing propylene aldehyde into acrylic acid, i.e. a composite oxide catalyst. The composite oxide catalyst prepared by the above method has the advantages of simple operation process, short preparation time, good selectivity and yield of acrylic acid.

The application provides a cellulose catalytic fermentation preparation method of industrial ethanol and a catalyst thereof, and belongs to the technical field of preparing industrial ethanol fuel from cellulose. The preparation method comprises raw material choline chloride-lactic acid eutectic solvent heat treatment, catalytic hydrolysis fermentation and product separation. The composite catalyst is prepared by compounding Zn-MOF-CNTs-OH composite precursor, lignin-cellulose-PMMA composite precursor, ammonium molybdate and melamine, sintering, NaOH etching, sequentially sulfonating by concentrated sulfuric acid and chlorosulfonic acid to introduce double acid sites, and finally mixing with ammonium iron citrate, nickel acetate, copper acetate and PVP-VA copolymer, and adding sodium borohydride aqueous solution to react. The crystalline structure of cellulose is broken by eutectic solvent pretreatment, the magnetic composite catalyst with double acid sites and metal alloy is used to realize efficient hydrolysis, the in-situ fermentation and catalyst regeneration process are combined, and the conversion efficiency and economy are significantly improved.

This invention discloses a method for preparing a reverse water-gas shift catalyst and its application, comprising the following steps: (1) dissolving tetrabutyl titanate, cerium nitrate, or gallium nitrate in water with ammonium molybdate, stirring until homogeneous, to prepare a mixed solution; (2) adding an organic acid to the mixed solution, stirring until homogeneous, and adjusting the pH of the solution; (3) heating the solution from step (2) until gelled, drying overnight, and then calcining to obtain the catalyst. This invention is the first to prepare a molybdenum-based bimetallic catalyst using the sol-gel method, which has the advantages of simple preparation steps, readily available raw materials, and safe operation. Furthermore, the catalyst obtained by this invention exhibits excellent CO2 conversion rate and nearly 100% CO selectivity.

The application discloses a process method for producing carbonyl iron powder from nickel-iron particles in the technical field of metal powder metallurgy, and the method comprises the following steps: grinding and screening nickel-iron particles and then performing vacuum drying pretreatment; dispersing the pretreated nickel-iron particles in anhydrous ethanol, adding an organic-inorganic hybrid manganese sulfide ammonium molybdate composite activator to perform surface modification, and obtaining modified nickel-iron particles; loading the modified nickel-iron particles into a reaction kettle, introducing carbon monoxide gas, performing a carbonylation reaction by heating, stopping heating, waiting for the reaction kettle to cool down, introducing nitrogen gas for purging, and introducing mixed gas phase into a two-stage condenser system; the mixed gas phase is sequentially cooled by a first-stage cooling to obtain a liquid of iron pentacarbonyl, and then the liquid of iron pentacarbonyl is cooled by a second-stage cooling to obtain a liquid of nickel tetracarbonyl; the liquid of iron pentacarbonyl is gasified after being subjected to vacuum rectification, and then is injected into a thermal decomposition tower for decomposition, so that carbonyl iron powder is obtained. The process is simple, raw materials are easy to obtain, the carbonylation reaction efficiency can be effectively improved, and the product has high purity.