72results about How to "Avoid inactivation" patented technology

The invention belongs to the technical field of cosmetics, and particularly relates to a cosmetic delivery system based on a natural wall material, a preparation method and application. The cosmetic delivery system is of a core-shell structure, a core is a cosmetic active component, and a shell layer is a composite polymer gel network of sodium alginate, sophorolipid and cellulose. The natural polysaccharide composite wall material is green and safe, has good biocompatibility and strong compatibility with cosmetic formulas, and does not irritate the skin. The delivery system can effectively protect cosmetic active ingredients from being damaged by illumination and oxygen, and the storage stability of the active ingredients is remarkably improved; meanwhile, slow release and targeted transdermal absorption of active ingredients are realized, and the bioavailability is improved.

The application discloses a deoxygenation method and a deoxygenation adsorbent for Fischer-Tropsch synthesis oil, and relates to the field of Fischer-Tropsch synthesis oil processing.The deoxygenation method comprises the following steps: introducing Fischer-Tropsch synthesis oil into an adsorption tower filled with the deoxygenation adsorbent, and removing oxygen-containing compounds.The deoxygenation adsorbent is prepared by the following method: step S1, adding an aluminum source, a silicon source and a template agent into a lye, and performing first aging at room temperature; continuously adding the aluminum source and the silicon source, and performing second aging at room temperature; performing crystallization at a predetermined temperature; and filtering and washing the product to obtain a molecular sieve; and step S2, immersing the molecular sieve in a lye, adding a template agent into the lye, and then performing crystallization; and filtering, washing, drying and calcining the product after the crystallization to obtain the deoxygenation adsorbent.The deoxygenation method for Fischer-Tropsch synthesis oil provided by the application significantly improves the quality of Fischer-Tropsch synthesis oil and the economic benefits of subsequent processing by preparing a deoxygenation adsorbent with multiple levels of pores and combining the adsorption tower.

The application belongs to the technical field of carbonyl sulfur hydrolysis catalysts, and discloses a high-efficiency sulfur-resistant catalyst for carbonyl sulfur hydrolysis, a preparation method and application thereof.The preparation method comprises the following steps: (1) preparing a porous ceramic carrier containing alumina, titanium dioxide and zirconium dioxide; (2) in-situ growing a metal organic framework material containing lanthanum, bismuth and cerium on the surface of the porous ceramic carrier by using a solvothermal method; (3) performing a calcination treatment on the porous ceramic carrier loaded with the metal organic framework material in an oxygen-containing atmosphere to obtain a catalyst precursor; and (4) performing a reducing gas plasma bombardment treatment on the catalyst precursor to obtain the high-efficiency sulfur-resistant catalyst.The high-efficiency sulfur-resistant catalyst has high-efficiency low-temperature activity, excellent sulfur resistance and long service life.

The invention belongs to the field of pharmaceutical preparations. The invention relates to lipid nanoparticles modified by probiotic coupled galactose and coated with diammonium glycyrrhizinate, L-arginine and copper tannic acid nano enzyme as well as a preparation method and application of the lipid nanoparticles. The lipid nanoparticles prepared by coupling and wrapping the diammonium glycyrrhizinate, the L-arginine and the copper tannic acid nano-enzyme with the probiotics have good biocompatibility, the preparation method is simple, the particle size distribution of the nanoparticles is uniform, the half-life period of a medicine circulating in a body can be prolonged, the inherent beneficial functions of the probiotics are cooperated, and the bioavailability of the medicine is improved. The potential application value is realized in the fields of treating the metabolic dysfunction related steatohepatitis and the like.

This invention relates to the field of wastewater treatment technology, specifically to a metal-doped bismuth ferrite-based perovskite composite material, its preparation method, and its applications. The molecular formula of the metal-doped bismuth ferrite-based perovskite composite material is Bi. 1‑x A x Fe 1‑y B y O3; 0 ≤ x < 1, 0

This invention relates to a mesoporous platinum@platinum-nickel core-shell framework nanowire and its preparation method, comprising the following steps: (1) uniformly mixing platinum precursor, nickel precursor, structure directing agent, and reducing agent with a first solvent, and performing a hydrothermal reaction to obtain Pt@Pt-Ni core-shell nanowires; (2) uniformly mixing the Pt@Pt-Ni core-shell nanowires with a second solvent and acetic acid, and performing an etching reaction to obtain etched mesoporous platinum@platinum-nickel core-shell framework nanowires. This invention employs a hydrothermal method, which is simple, reproducible, and allows for batch production with safety. Compared with traditional commercial platinum-carbon catalysts, the catalytic activity is greatly improved, the stability is greatly enhanced, and the production cost is reduced.

The application belongs to the technical field of ship exhaust purification, and particularly relates to a catalyst for decomposing N2O in the exhaust of a ship ammonia internal combustion engine and a preparation method thereof. 3+ By replacing Co ions in the Co3O4 spinel lattice into the lattice, the doping behavior can effectively reduce the number of hydroxyl groups on the surface of the catalyst, significantly weaken the adsorption and combination ability of water molecules, and thus improve the stability of the catalyst in a high-humidity exhaust environment. As an additive, CeO2 uses its oxygen storage capacity to promote the migration and desorption of oxygen species in the reaction, preventing the deactivation of active sites due to oxygen poisoning. The molecular sieve carrier not only provides a highly dispersed surface for the active component to prevent sintering, but also optimizes the adsorption and activation path of N2O and alleviates the poisoning effect of nitrogen-containing intermediate species or impurities in the exhaust on the Co active center during the reaction.

This invention provides a formulation and preparation method for an exosome-based skin medication. Taking the preparation of a 100g finished formulation as an example, it consists of active ingredients, a nanogel carrier, a composite stabilizer, a moisturizer, a pH adjuster, a preservative, and deionized water. By constructing a nanogel sustained-release system adapted to exosomes and a composite protection mechanism, the exosomes are stably and slowly released and efficiently absorbed on the skin surface within 7 days. This solves the problems of rapid release, low utilization rate, poor stability, and frequent reapplication required for exosome-based skin medications, thereby improving the skin care and treatment effects of exosomes.

The invention relates to the technical field of laundry products, in particular to a low-temperature high-concentration washing liquid and a preparation method thereof. The cleaning agent is prepared from the following components in percentage by weight: 38% of isomerized 1307, 28% of secondary alcohol aeo-9, 10% of propylene glycol, 0.3% of compound enzyme, 2% of glycerol, 21.2% of deionized water and 0.5% of essence. According to the low-temperature high-concentration washing liquid and the preparation method thereof, the isomerized 1307 and the secondary alcohol AEO-9 are compounded according to a specific proportion, and the synergistic anti-freezing effect of the propylene glycol and the glycerol is combined, so that the freezing point of a system is remarkably reduced, the pH value can be adjusted according to the actual situation, and the low-temperature high-concentration washing liquid is prepared. The prepared washing liquid can still keep good fluidity after being stored for a long time at 0 DEG C or even lower temperature, is free of crystallization and solidification, and solves the problem of freezing of highly concentrated products in winter.

The invention discloses a momordica grosvenori active component extraction and concentration device which comprises a bottom shell, a second fixing disc, an inner pipe and a rotating rod, the top of the bottom shell is in bolted connection with a middle shell, the top of the middle shell is in bolted connection with an upper shell, and the top of the upper shell is in bolted connection with a top cover; an electric heating rod is installed at the bottom of the inner side of the bottom shell, and a liquid level meter is fixed to the inner wall of one side of the bottom shell. According to the invention, the electric heating rod and the circulating pump are arranged, and during heating concentration, the circulating pump drives raw materials to circularly flow in the bottom shell, so that the raw materials uniformly contact with the electric heating rod during flowing, the time that the raw materials in unit volume contact with the electric heating rod is shortened, inactivation of active components caused by local overheating is avoided, and the use safety is improved.

The invention discloses a multi-element carbon-based microbial blended fertilizer for rice quality improvement and yield increase, and relates to the technical field of fertilizers, and the multi-element carbon-based microbial blended fertilizer comprises the following raw materials by weight: 10-20 parts of a multi-element carbon source, 40-50 parts of a compound fertilizer, and 1-1.5 parts of a vermiculite-loaded microbial agent. The vermiculite-loaded microbial agent is prepared from modified vermiculite-loaded nitrogen-fixing bacteria, phosphate-solubilizing bacteria, potassium-solubilizing bacteria and growth-promoting bacteria, so that the microbial strains can be slowly released and maintain the activity, and the activity of microbial flora can be durably promoted by combining a multi-element carbon source and a compound fertilizer; the flora activity promotes the release and absorption of multi-element carbon source nutrients, and the fertilizer efficiency of the microbial blended fertilizer is effectively prolonged, so that the rice quality improvement and yield increase are promoted.

This invention discloses a fermentation agent for treating agricultural ecological solid waste, its preparation method, and its application, belonging to the field of microbial technology. The fermentation agent of this invention comprises compound functional bacteria, soybean meal, molasses, disodium hydrogen phosphate, corn straw powder, and a preservative. The compound functional bacteria include *Bacillus subtilis*, *Trichoderma helicola*, and *Bacillus bellis*. This invention uses a compound of three strains—*Bacillus subtilis*, *Trichoderma helicola*, and *Bacillus bellis*—in a specific ratio to synergistically accelerate the decomposition of straw, effectively shortening the fermentation cycle and improving the decomposition effect. This agent can efficiently degrade agricultural ecological solid waste, converting it into high-quality organic fertilizer, thus turning waste into treasure. It solves the problem of agricultural solid waste pollution and saves fertilizer resources, demonstrating significant ecological, economic, and social benefits.

This invention relates to the fields of adsorbent preparation and heavy metal remediation technology, and particularly to an amorphous iron-magnesium-aluminum silicate, its preparation method, and its applications. This invention utilizes molten salt-mediated ion exchange and lattice recombination under high-temperature conditions to completely and uniformly transform various silicate minerals from complex and inconsistent natural clay minerals into a non-naturally formed, structurally homogeneous, and stable amorphous iron-magnesium-aluminum silicate. This overcomes the limitation of traditional adsorbents having a narrow applicable concentration range, exhibiting extremely strong removal capabilities for heavy metal ions from high to low concentrations, achieving deep purification. Based on the theory of "increasing configurational entropy," this invention proposes the design of a silicate network framework with dense, highly active sites and multiple metals, breaking through the traditional approach of "simple modification" of natural clay minerals. It fundamentally reconstructs their material composition, providing a material that combines low cost with revolutionary adsorption performance.

This utility model discloses a system for removing impurities from carbon-containing chlorosilanes and recovering chlorosilanes, comprising: a first distillation column for receiving and concentrating carbon-containing chlorosilanes; a first adsorption and reaction device connected to the first distillation column, the first adsorption and reaction device being filled with a metal adsorbent material and equipped with a silicon tetrachloride feed pipeline; a second adsorption and reaction device connected to the first adsorption and reaction device, the second adsorption and reaction device being filled with a methyldichlorosilane adsorbent material; a second distillation column connected to the second adsorption and reaction device; and a third distillation column connected to the second distillation column. This utility model can adsorb and concentrate metal impurities in carbon-containing chlorosilanes as a catalyst for the carbon removal reaction, effectively avoiding deactivation and failure caused by metal impurities encapsulating the resin catalyst, improving the conversion rate of methyldichlorosilane, and effectively avoiding the disproportionation reaction of silicon trichloride in the presence of the resin catalyst, thereby improving the carbon removal efficiency and chlorosilane recovery efficiency.

The invention relates to the technical field of filling automation control, in particular to a cosmetic filling control method based on a large model knowledge graph, which comprises the following steps: acquiring an actual filling rate to determine a dynamic filling efficiency index, and determining whether the filling efficiency is stable based on the dynamic filling efficiency index. Determining the abnormal level of the filling efficiency in combination with the nitrogen filling response delay; determining that the filling efficiency is reduced due to the fact that moisture absorption raw material components are influenced by environmental factors to change the viscosity of a material body based on the combination of the viscosity-temperature sensitivity coefficient and the actual viscosity of a product and the environmental humidity, and adjusting a temperature set value of a compression area; the actual response time for adjusting the nitrogen flow is obtained to determine a response efficiency index, whether the comprehensive efficiency of nitrogen charging meets the expectation or not is determined based on the response efficiency index, and the calibration delay for determining the abnormal level of the filling efficiency is adjusted. The filling process is regulated and controlled on the basis of the product characteristics of cosmetics needing to be filled and the characteristics of filling equipment.

This utility model belongs to the technical field of centrifuge equipment, specifically a heated and constant-temperature centrifuge device. Addressing the problem of inconvenient and time-consuming fixation of test tubes in centrifuges, the following solution is proposed: a centrifuge casing and a top cover located on the top of the casing, the top cover having an exhaust vent; a rotating base rotatably mounted on the inner bottom wall of the centrifuge casing, a base plate fixedly mounted on the top of the rotating base, a connecting column fixedly mounted on the top of the base plate, a top plate fixedly mounted on the top of the connecting column, and multiple insertion holes on the top plate; a bearing fixedly mounted on the bottom of the top cover, a vertical rod fixedly mounted on the inner ring of the bearing, and a limiting plate fixedly mounted on the bottom end of the vertical rod; and an electric push rod fixedly mounted on the outer side of the centrifuge casing. This utility model facilitates the positioning and fixation of test tubes and allows for heating and insulation of the test tubes, preventing sample inactivation due to centrifugation at low temperatures.

The application relates to the hydrogen energy preparation technical field, in particular to a methanol cracking hydrogen production carbon process and system, the methanol cracking hydrogen production carbon process comprises the following steps: a, preparing methanol gas; b, methanol cracking is carried out through a catalyst system: under an argon atmosphere, the catalyst system is heated to a predetermined temperature, the methanol gas is introduced, and methanol cracking hydrogen production carbon is carried out; the catalyst system comprises an alloy catalyst and a modified metal oxide catalyst; c, product collection: collecting hydrogen and carbon material obtained by cracking. The application provides a methanol cracking hydrogen production carbon process and system, so as to solve the problems of insufficient catalyst activity and selectivity, large reactor energy consumption and high investment.

The application discloses a calcium carbide furnace tail gas deep purification process. The calcium carbide furnace tail gas is firstly subjected to wet desulfurization and dehydrocyanation and TSA treatment, and then sequentially enters a de-fluorine and de-hydrocyanation reactor, a hydrolysis desulfurization reactor, a fine desulfurization reactor, a de-phosphorus and de-arsenic reactor, a de-oxygen reactor and a de-hydrocarbon reactor. After the treatment process, the HCl content in the gas is less than 0.1 ppm, the HF content is less than 0.1 ppm, the HCN content is less than 0.1 ppm, the total sulfur content is less than 0.1 ppm, the AsH3 content is less than 5 ppb, the PH3 content is less than 5 ppb, the oxygen content is less than 10 ppm, and the unsaturated hydrocarbon content is less than 0.1 ppm, thereby meeting the separation and purification requirements of subsequent processes, and the pressure drop of the whole process is not more than 100 kPa. The process can remove oxygen and unsaturated hydrocarbons in the gas under low-temperature conditions, thereby reducing the occurrence of side reactions, and has the characteristics of reasonable process design, high purification precision, low energy consumption and low operation cost.

This invention relates to the field of catalyst technology, specifically to a solid acid catalyst for post-etherified C4 olefin trimers, its preparation method, and its application. The catalyst comprises at least a metal salt active component, diammonium hydrogen phosphate, and a catalyst support; the metal salt active component includes aluminum sulfate and ferric sulfate; the molar ratio of phosphate ions in the diammonium hydrogen phosphate to metal cations in the metal salt active component is nPO4. 3‑ / n(Al 3+ +Fe 3+ The total amount of metal salt active components and diammonium hydrogen phosphate in the solid acid catalyst accounts for 5-10% of the total mass of the solid acid catalyst. By optimizing the formulation and process of the solid acid catalyst, the problems of easy mudding and clogging of existing solid phosphoric acid catalysts, easy carbon deposition and deactivation of molecular sieve catalysts and complex process operation, and high cost of ionic liquid catalysts are effectively solved, so as to better meet the production and application needs of post-etherified C4 olefin trimers.

The utility model provides a kind of based on hot air circulation's chili seed drying equipment, including shell, storage tank and hot air circulation device, the shell is provided with the feed inlet being communicated with the storage tank;The hot air circulation device includes circulating hot air blower, air inlet pipe, air return pipe, feeding assembly and several dry plates fixedly connected in storage tank, first heating cavity is provided in the feeding assembly, second heating cavity is provided in the dry plate, the second heating cavity is connected with the first heating cavity by the air inlet pipe, the second heating cavity is connected with circulating hot air blower by air return pipe;The circulating hot air blower is used to the first heating cavity in cyclic input hot air, the feed inlet is located in the discharge end of the feeding assembly;The utility model can dry to humid seed in stage, has remarkable advantage in protecting seed activity, improving drying efficiency and ensuring storage safety.

This invention provides a supported noble metal catalyst, its preparation method, and its application, belonging to the field of industrial flue gas catalytic purification technology. The supported noble metal catalyst provided by this invention includes a cordierite support and a platinum catalyst bonded to the surface and pores of the cordierite support by a binder. The platinum catalyst includes a support and an active component and an active agent supported on the surface of the support. The active component is elemental Pt and Pt oxides; the active agent is one or more of tungsten oxide, molybdenum oxide, and vanadium oxide. The supported noble metal catalyst provided by this invention exhibits excellent sulfur and water resistance, is not easily deactivated, and has high catalytic efficiency.

The application discloses a carbon dioxide hydrogenation system for synthesizing methane, which is suitable for hydrogen source fluctuation, and solves the technical problems of the existing methanation reaction system, such as large equipment investment, large floor area and potential safety hazards caused by the hydrogen storage buffer device for suppressing hydrogen source fluctuation. The system comprises a raw material supply unit, a preheating unit, a reaction unit, a waste heat recovery unit, a cooling and separation unit, a circulation unit and a control unit. The hydrogen feeding pipeline of the raw material supply unit is provided with a flow detection device. The raw material preheater of the preheating unit performs primary preheating on the mixed raw material gas, and an electric heater performs secondary heat supplement. The reaction unit comprises a primary adiabatic reactor and a secondary adiabatic reactor. The waste heat recovery unit comprises a primary steam generator and a secondary steam generator. The total outlet pipeline connected with the gas phase outlet of the water separator of the cooling and separation unit is divided into an external delivery pipeline and a circulation pipeline. The control unit takes fresh hydrogen flow as a feedforward variable to perform collaborative adjustment.

The present application relates to the technical field of soft candy production, in particular to a vacuum low-temperature boiling process and equipment for heat-sensitive functional soft candy, comprising a supporting assembly, a heating assembly and a sealing assembly, wherein the supporting assembly comprises a bottom plate, a side plate, a top plate, a lifter, a lifting plate and a supporting plate; the vacuum low-temperature boiling process and equipment for heat-sensitive functional soft candy is characterized in that the sealing assembly adopts a "vacuum generator + sealing ring" structure, the vacuum degree in the heating box is quickly extracted to -0.06~‑0.09MPa, the boiling point of the material is reduced, low-temperature boiling at 60‑75℃ is realized, and the inactivation of heat-sensitive components such as probiotics and vitamins caused by high temperature is avoided; the angle adjusting assembly adopts a servo motor to drive a worm gear transmission, which drives the heating box to freely roll around the hinged shaft; when loading, the heating box can be rolled to an inclined state, which facilitates the pouring of the material; when discharging, the heating box is inclined by 30‑45°, and uniform discharging is realized in cooperation with the flow guide plate, thereby solving the problem of inconvenient loading and unloading of the traditional equipment.

The application discloses a special feed for fattening pigs rich in functional amino acids, which comprises the following components in parts by weight: a core functional amino acid composition 3-5 parts, a low-soybean meal multi-protein matrix 60-70 parts, a nutrition synergistic component 20-25 parts, an anti-nutritional factor degradation agent 1-2 parts, and a micro-ecological and plant extract component 1-2 parts. A preparation method comprises the following steps: obtaining the low-soybean meal multi-protein matrix by pretreating raw materials; preparing the core functional amino acid microcapsule; mixing the basic materials and then performing low-temperature section granulation; after cooling, mixing the micro-ecological and plant extract component at low temperature; and finally screening and removing impurities and unqualified particles to obtain the finished product. The application optimizes the amino acid ratio and the preparation process, protects the activity of the amino acids, adapts to different growth stages of the fattening pigs, improves the growth performance and carcass quality, improves the raw material digestion rate, reduces nitrogen emission, and has strong applicability.

The application discloses a white goat feed containing zearalenone degrading enzyme, and comprises a basic daily ration and zearalenone degrading enzyme, wherein the addition amount of the zearalenone degrading enzyme is 0.01%-0.10% of the total weight of the feed. The zearalenone in the feed is subjected to enzymatic degradation reaction in the digestive tract of the animal by adding the zearalenone degrading enzyme in the basic daily ration of the white goat, so that the residual amount of the zearalenone in the gastrointestinal tract is reduced, the estrogen-like toxic effect of the zearalenone on the female white goat is reduced, and problems such as vulva swelling, abnormal reproductive organs and abnormal follicular development of the ovary caused by zearalenone pollution are effectively relieved.

This invention relates to the field of hydrogen peroxide technology and discloses a system and method for preparing hydrogen peroxide. The system includes a hydrogenation unit, an oxidation unit, and an extraction unit connected in sequence. The hydrogenation unit includes a fixed-bed reactor, comprising: a reactor body; a liquid phase inlet, N gas phase inlets, a liquid phase outlet, and a gas phase outlet arranged sequentially from bottom to top on the reactor body; and N catalyst bed sections and a gas-liquid separation component arranged sequentially from bottom to top within the reactor body; N is a natural number and N≥2; a gas distributor is provided below each catalyst bed section and is connected to the gas phase inlet; the gas-liquid separation component is divided into a two-phase zone, a liquid phase zone, and a gas phase zone; the liquid phase zone has a liquid phase outlet; and the gas phase zone has a gas phase outlet. Using this system to prepare hydrogen peroxide can significantly improve hydrogenation efficiency and hydrogenation selectivity, has good safety, effectively improves the selectivity of the hydrogenation reaction and the efficiency of the device, and extends the service life of the catalyst.

This invention discloses a polyacid-based mild acne-removing composition, its preparation method, and its application, belonging to the field of acne treatment preparation technology. By mass percentage, the polyacid-based mild acne-removing composition comprises 1%–10% bee venom peptide, 0.25%–5% microcapsules containing polydeoxyribonucleotides, 0.2%–1.5% soothing active ingredients, 0.5%–3% biosaccharide gum-1, 0.2%–2% biosaccharide gum-2, 0.05%–0.5% astragalus gum, 0.1%–1% pH buffering compound, 2%–10% acid mixture, and 3%–20% alcohol mixture, with the balance being water. This acne-removing composition achieved a low-irritation user experience with a high-concentration polyacid formula in subjects with sensitive, mild to moderate facial acne, effectively improving the problems of poor tolerance and limited applicability of traditional acid-based acne products for sensitive skin, significantly broadening the applicable skin types and application scenarios for high-efficacy acid-based acne products, and balancing effective acne removal with safety suitable for sensitive skin.

This application discloses an integrated coupling device for denitrification and carbon monoxide removal, belonging to the technical field of flue gas purification equipment. By incorporating an integrated flue gas flow pipe within the device, the carbon monoxide removal catalyst and the denitrification catalyst are respectively isolated and placed in two channels within the flow pipe. This ensures smooth flue gas flow with low resistance, effectively preventing carbon monoxide catalyst deactivation due to poisoning, thus guaranteeing carbon monoxide removal efficiency and extending service life. Furthermore, the integrated flue gas flow pipe is mounted on the support beam simultaneously with the catalyst installation, achieving a compact configuration of the equipment space and effectively solving the problem of tight site layout. Simultaneously, the integrated flue gas flow pipe structure significantly reduces structural and civil engineering costs, enabling more convenient system operation, maintenance, and repair.

The application discloses a mesoporous hollow sphere assembly structure catalyst and a preparation method and application thereof, and belongs to the technical field of hydrogen production by methane decomposition. The preparation method comprises the following steps: dissolving Ni salt, Al salt and Ce salt in a solvent, and controlling the molar ratio of Ni, Al and Ce to be 7:(1-2.5):(0.5-2); obtaining atomized liquid drops through atomization, and performing a decomposition reaction on the atomized liquid drops at 400-500 DEG C; collecting reaction products, drying, and then calcining by heating to 550-700 DEG C to obtain a catalyst precursor; and performing reduction treatment on the catalyst precursor in a reducing atmosphere, and the mesoporous hollow sphere assembly catalyst with a cerium-doped regulated interface is obtained. The catalyst exhibits remarkable high mass space velocity long-term stability and anti-coking performance in the methane catalytic decomposition reaction.

The application discloses a ruthenium-based ammonia synthesis catalyst, a preparation method thereof and application of the catalyst in catalytic synthesis of ammonia. The ruthenium-based ammonia synthesis catalyst comprises a high-entropy oxide carrier and a ruthenium active component supported on the carrier; the high-entropy oxide is a single solid solution phase formed by oxides of at least three of Mg, Ca, Sr and Ba and at least two of La, Ce, Pr, Nd and Sm. The preparation method comprises the following steps: mixing soluble salts corresponding to each metal constituting the high-entropy oxide with an organic foaming agent in water, evaporating and concentrating to form a gel, heat-treating the gel at 110-150 DEG C to make the gel foam, and obtaining a porous and fluffy solid precursor; grinding the solid precursor and performing joule heating treatment in a non-oxidizing atmosphere, instantaneously heating the solid precursor to 600-1200 DEG C within 10 seconds, keeping the temperature for 1-10 seconds, and then cooling to obtain the high-entropy oxide carrier; and supporting the ruthenium active component on the high-entropy oxide carrier to obtain the ruthenium-based ammonia synthesis catalyst.