121 results about "Cobalt catalyst" patented technology

The invention provides a catalyst, a preparation method and application thereof, and a method for preparing primary amine by catalyzing nitrile compound hydrogenation, and particularly relates to the technical field of catalyst synthesis. The catalyst comprises a nickel / cobalt-based catalyst and a metal salt; wherein the nickel / cobalt-based catalyst is selected from any one of a supported nickel / cobalt-based catalyst, a Raney nickel / cobalt catalyst or a nickel / cobalt nanocrystal; the metal salt comprises any one or a combination of at least two of tungsten salt, molybdenum salt, vanadium salt, aluminum salt and cerium salt. The metal salt and the nickel / cobalt main catalyst have a synergistic effect: the surface electron density is adjusted through electron transfer, the hydrogen dissociation and cyano adsorption activation capacities are enhanced, the hydrogenation activity is improved, and the mild condition reaction is assisted; the surface chemical environment is changed or steric hindrance is borrowed, the primary amine selectivity is improved, and byproducts are inhibited; aluminum salt, cerium salt and the like inhibit nickel / cobalt agglomeration, increase active sites, enhance stability, prolong the service life and reduce the dosage.

The invention discloses a low-defect molecular sieve supported cobalt catalyst for propane dehydrogenation and a preparation method thereof. The cobalt-based molecular sieve catalyst comprises a low-defect molecular sieve (L-Zeoliite) carrier and an active component cobalt loaded on the molecular sieve carrier. The preparation method of the Co / L-Zeoliite catalyst comprises the following steps: repairing defects of the defective molecular sieve carrier, and loading the active component cobalt on the low-defect molecular sieve. According to the method, various commodities or self-made molecular sieves are adopted, the low-defect molecular sieve carrier is synthesized through innovative alkali liquor repairing, monatomic Co or ultra-small CoO clusters can be limited to the low-defect molecular sieve through the method, and the activity of the molecular sieve catalyst is far higher than that of a conventional defect (silicon hydroxyl nest) limited Co molecular sieve catalyst and is higher than that of most noble metal-based catalysts. In addition, the invention further provides a process for synthesizing the catalyst through a one-pot method, the dosage of active metal is greatly reduced, the synthesis process is simplified, the applicability to raw materials and carriers is high, and the application prospect is good.

The invention relates to a zeolite-based cobalt catalyst and a preparation method and application thereof, and belongs to the technical field of advanced oxidation of persulfate. The preparation method comprises the following steps: mixing zeolite and cobalt salt in water for ion exchange, and then filtering and drying to obtain precursor powder; and carrying out ball milling on the precursor powder to obtain the zeolite-based cobalt catalyst, and activating PMS to degrade organic pollutants by using the zeolite-based cobalt catalyst. The zeolite-based cobalt catalyst increases the utilization rate of a metal active center by confining part of metal active sites, creates a nanoscale heterogeneous reaction space, shortens the internal diffusion distance, and realizes a more efficient and faster catalytic oxidation process.

The invention provides a modified cobalt catalyst and a preparation method and application thereof. The invention provides a modified cobalt catalyst which comprises a cobalt element, an aluminum element, a transition metal element, other metal elements of the group IIIA except the aluminum element, an alkali metal element, an alkaline earth metal element and a boron element, and the boron element exists in the form of a B-O-Al bond. The modified cobalt catalyst has the characteristics of high activity and high selectivity when used for reducing nitrile compounds.

The present disclosure relates generally to a supported Fischer-Tropsch catalysts and Fischer-Tropsch synthesis processes for preparing hydrocarbons using the same. The catalyst materials described herein include a support material; cobalt, present in an amount in the range of 5 to 25 wt%, based on the total weight of the catalyst material; and gallium, present in an amount in the range of 0.1 to 10 wt%, based on the total weight of the catalyst material.

The application relates to a chiral NSiN ligand based on a phenyloxazoline skeleton, a preparation method and application thereof, wherein the chiral NSiN ligand is prepared from a chiral phenyloxazoline bromide with R or S configuration through lithiation and silylation. The chiral NSiN ligand can be used in transition metal catalyzed asymmetric synthesis, and is used in catalyzing an allylic sulfonylation reaction with a cobalt catalyst, and shows high reaction activity and high stereoselectivity.

The application discloses a kind of using cobalt catalyst by unreported double migration coupling strategy, realizes migration asymmetric nitrogen hetero Nozaki-Hiyama-Kishi (aza-NHK) reaction, and the selective preparation α-chiral (E)-allyl amine starting from simple and easy to obtain ortho halogen phenyl ethylene or corresponding E / Z-alkyl bromide or its mixture belongs to the field of organic chemistry and medicinal chemistry.The application under the action of metal cobalt source, ligand, organic additive, inorganic additive etc., makes cyclic sulfonamide and ortho alkenyl substituted aryl halide or alkenyl halide react in organic solvent, to obtain a series of polysubstituted olefins with excellent regioselectivity, stereoselectivity and good yield, which can be used as active drug molecules and important synthetic intermediates.The application uses cheap transition metal cobalt as catalyst, and uses ortho alkenyl substituted aryl iodine and cyclic sulfonamide as raw material, and the reaction condition is warm, simple operation, and good functional group compatibility.

The invention relates to the technical field of organic synthetic chemistry, and discloses a preparation method of alkenyl gem-diborate. According to the preparation method of the alkenyl gem-diborate, a cobalt catalyst serves as a core, a high-activity cobalt complex is formed under the combined action of a specific ionic N-heterocyclic carbene ligand and alkali, the complex can be reduced into a catalytic activity intermediate by a boron test, regeneration of the cobalt catalyst is achieved, and the next round of reaction continues to be catalyzed. The adopted cobalt catalyst is rich in reserves, low in price, easy to obtain and environment-friendly; reaction conditions are mild, and high efficiency and high selectivity are achieved; the reaction substrate functional group tolerance is high, the substrate source is wide, the method is suitable for aromatic alkyne, and aliphatic alkyne and alkyne with large steric hindrance can also be adopted; the reaction can be amplified to a gram scale for preparation; the yield, the selectivity and the purity of the product are improved; the invention provides a new synthesis route and method for alkenyl gem-diborates, and can provide alkenyl gem-diborates with various structures for synthesis of polysubstituted olefins, natural products or pharmaceutical molecules.

The invention discloses a cascade bifunctional catalyst, a preparation method thereof and application of the cascade bifunctional catalyst in CO2 high value-added catalytic conversion, and belongs to the technical field of chemical catalysis. The cascade bifunctional catalyst is formed by compounding a sodium-iron-cobalt catalyst, a potassium-copper-zinc-aluminum catalyst and a molecular sieve, and the catalyst can realize high-selectivity preparation of aromatic hydrocarbon by hydrogenation of carbon dioxide (CO2) through an ethanol-coupled olefin conversion route. A new reaction path provided by the constructed cascade bifunctional catalyst can effectively regulate and control front-section reaction product distribution, the mass transfer and heat transfer performance of the catalyst is remarkably optimized, and then the selectivity and reaction efficiency of a target product are improved.

The application discloses a preparation method of a non-conjugated functionalized olefin compound, and the method is carried out in a cobalt / photocatalysis dual catalytic system which is composed of a cobalt catalyst, a ligand, a photocatalyst, a hydrogen source, a base and a solvent. β The target product is efficiently and selectively synthesized through reaction of an ethylenic compound or a halogenated compound or an electron-deficient olefin represented by formula (2) with acetylene as a C2 synthetic unit. The application adopts a cobalt / photocatalysis dual catalytic synergistic mechanism, has mild conditions (normal temperature and pressure, visible light driving), uses water as a green hydrogen source, uses acetylene as a cheap C2 source, has high atom economy, has good substrate universality, and the compound represented by formula (1) is easy to be prepared through Friedel-Crafts acylation or is commercially available, and the compound represented by formula (1) is easy to generate the compound (III) represented by formula (2) under the action of a base. The obtained non-conjugated olefin is a key intermediate for synthesizing high-value-added fine chemicals such as fragrances and insect pheromones, and has wide application prospects.

The invention discloses a phosphorized cobalt vanadate catalyst for electrosynthesis of urea and a preparation method of the phosphorized cobalt vanadate catalyst, and belongs to the technical field of electrocatalysis. The problems of low Faraday efficiency and yield in the existing electro-catalytic urea synthesis reaction process are solved. The bimetallic catalyst P-CoVO-NF for synthesizing urea through efficient electro-catalysis of co-reduction of nitrate and carbon dioxide is constructed by taking Co and V as bimetallic active sites, and the bimetallic catalyst is of a nanosheet structure, uniform in element distribution, good in stability and excellent in charge transfer capacity. And when nitrate is subjected to electro-catalysis reduction, excellent Faraday efficiency and yield are shown. A test result shows that the urea yield of the P-CoVO-NF catalyst reaches up to 124.9 umol.h <-1 >. Cm <-2 > in a mixed solution of KNO3 and KHCO3 at-0.6 V vs.RHE, and the urea yield is kept stable after 10 cycle periods.

The invention belongs to the technical field of synthesis of fine chemical intermediates, and particularly relates to a continuous flow synthesis method and device of 2-methylbenzoquinone. The method comprises the following steps: a) dissolving 2-methylphenol and a Schiff base cobalt catalyst in an organic solvent to prepare a raw material solution; b) conveying the raw material liquid to a microreactor by using a pump, mixing the raw material liquid with oxygen or air in the conveying process, and then carrying out continuous oxidation reaction under certain reaction conditions to generate 2-methylbenzoquinone; and c) separating and purifying the reaction product to obtain the 2-methylbenzoquinone product.The micro-channel reactor is adopted to strengthen mass transfer and reduce the safety risk, the Schiff base cobalt is used as the catalyst, air or oxygen is used as the oxidizing agent, the reaction efficiency and yield are improved, pollution is reduced, and efficient, green and safe production is achieved.

The invention provides a nickel-iron-cobalt catalyst for AEM water electrolysis hydrogen production as well as a preparation method and application of the nickel-iron-cobalt catalyst. The preparation method of the nickel-iron-cobalt catalyst for AEM water electrolysis hydrogen production comprises the following steps: S1, dissolving nickel salt in water to obtain a nickel-containing solution, dissolving iron salt in water to obtain an iron-containing solution, dissolving cobalt salt in water to obtain a cobalt-containing solution, and dissolving sodium borohydride in water to obtain a sodium borohydride solution; s2, uniformly mixing the nickel-containing solution, the iron-containing solution and the cobalt-containing solution to obtain a mixed solution; s3, mixing and stirring the mixed solution and a sodium borohydride solution to generate a large amount of precipitate, and further cleaning, drying and grinding the precipitate to obtain the nickel-cobalt-iron oxygen evolution catalyst. The nickel-iron-cobalt catalyst provided by the invention can replace an iridium oxide (ruthenium) catalyst. The catalyst has low overpotential when applied to AEM water electrolysis hydrogen production, long-time effective electrolytic reaction can be guaranteed, and meanwhile the cost of an AEM electrolytic cell is remarkably reduced.

This invention discloses a platinum-cobalt phosphate catalyst for the selective electrooxidation of ethylene glycol to glycolic acid, its preparation method, and its application. The preparation method includes: S1, pretreating nickel foam (NF); S2, dissolving disodium hydrogen phosphate dodecahydrate and hexadecyltrimethylammonium bromide in a mixture of water and ethylene glycol, adding cobalt nitrate and stirring to obtain a precursor; S3, immersing the nickel foam in the precursor solution and refrigerating it overnight at low temperature; S4, transferring it to a reaction vessel and hydrothermally heating it at 160 °C for 10 hours to obtain cobalt phosphate (CoPO / NF); S5, using CoPO / NF as the working electrode, electrochemically depositing platinum in an H2PtCl6 and KOH electrolyte using cyclic voltammetry; S6, washing and vacuum drying to obtain the final product. This invention is the first to prepare a platinum-cobalt phosphate catalyst for the selective electrooxidation of ethylene glycol to glycolic acid at 100 mA cm⁻¹. ‑2 With a working potential of only 0.67 V at current density (relative to RHE) and a Faraday efficiency of 100% for glycolic acid, it has significant advantages and application potential in the highly selective production of glycolic acid in the electro-oxidation reaction of ethylene glycol.

The application discloses a catalyst for preparing beta-lactone by epoxide carbonylation and a preparation method and application thereof. The catalyst is composed of a homogeneous metal complex and a heterogeneous supported cobalt catalyst. The homogeneous metal complex is one of a porphyrin metal complex and a Schiff base metal complex. The heterogeneous supported cobalt catalyst is composed of a metal center and an organic phosphine ligand polymer connected with the metal center through a coordination bond. The metal center is cobalt, and the organic phosphine ligand polymer is a cross-linked polymer containing a repeating phosphine ligand unit. The metal center is connected with P atoms in the organic phosphine ligand polymer through a coordination bond. The cobalt center forms a stable coordination structure through a ligand, and the coordination layer of cobalt satisfies an electronic saturation state. The cobalt catalyst has high stability, is suitable for a fixed bed or a slurry bed reactor, is favorable for realizing continuous and stable operation of an epoxide carbonylation reaction, and has good industrial amplification potential.

This invention discloses a nitrogen-doped carbon-based supported cobalt catalyst and its application in the degradation of hydroxyl-containing aromatic pollutants. Targeting hydroxyl-containing aromatic pollutants, this invention uses specific conditions to prepare a nitrogen-doped carbon-based supported cobalt catalyst for activating persulfate and degrading specific organic pollutant systems. It establishes a coordination anchoring effect between cobalt and nitrogen-containing sites, improving carbon framework defects and electron transport capabilities, while reducing the risk of metal leaching. This effectively improves catalytic performance and selectivity, achieving efficient activation of persulfate under near-neutral conditions to achieve efficient degradation of hydroxyl-containing aromatic pollutants.

The application provides a cobalt phosphide water electrolysis catalyst and a preparation method thereof, and the preparation method comprises the following steps: (1) soaking foam nickel in a polyvinylpyrrolidone solution, and obtaining modified foam nickel after reaction; (2) mixing a cobalt nitrate hexahydrate solution and a 2-methylimidazole solution to obtain a mixed solution, adding the modified foam nickel into the mixed solution, and obtaining a metal organic framework ZIF-67@foam nickel material after reaction; (3) carrying out a separated gas phosphorization reaction on the metal organic framework ZIF-67@foam nickel material under a nitrogen atmosphere, and obtaining the cobalt phosphide water electrolysis catalyst. The cobalt phosphide catalyst prepared in the application has a high specific surface area and porosity, is beneficial to the exposure of active sites, and has excellent water electrolysis catalytic performance.

The application provides a method for constructing a planar chiral [2,2] paracyclophane by cobalt-catalyzed asymmetric carbon-hydrogen bond activation-kinetic resolution, which comprises the following steps: under the condition of direct current electrolysis, using a cobalt catalyst, a chiral ligand and an additive, taking a graphite felt electrode as an anode and a platinum electrode as a cathode, and allowing a racemic [2,2] paracyclophane formamide to undergo asymmetric carbon-hydrogen bond dehydrogenation coupling / kinetic resolution with an aryl acid, and after the reaction is completed, corresponding post-treatment is performed to obtain a planar chiral [2,2] paracyclophane formamide and a planar chiral oxo para-[2,2] paracyclophane. The application realizes electrochemical synthesis of the planar chiral oxo para-[2,2] paracyclophane by the method of crust-abundant transition metal catalyzed asymmetric carbon-hydrogen bond activation, the reaction substrate has wide universality, the stereoselectivity is excellent, and the product and the split-recovered raw material have excellent ee value (up to >99% ee) and a split factor (up to 1057).

The invention relates to a method for preparing ester compounds with large steric hindrance based on a hydrocarbonylation reaction of olefin. Comprising the following steps: in an inert gas atmosphere, mixing a cobalt catalyst, a photosensitizer, Bronsted acid, olefin, alcohol or phenol and a solvent, putting the mixture into a high-pressure reaction kettle with a visible glass window, then carrying out light irradiation reaction in a carbon monoxide gas atmosphere, and carrying out column chromatography purification to obtain the large-steric-hindrance ester compound. The raw materials used in the method are cheap and easy to obtain, the experimental steps are easy to operate, the reaction conditions are mild, the method has good functional group compatibility and high regioselectivity, an efficient method is provided for synthesis of large-steric-hindrance ester compounds, and the method has wide industrial application prospects.

TITLE: Cobalt-containing catalyst composition for the synthesis of carbon nanotubes The present invention relates to an enhanced activity catalyst composition for the synthesis of carbon nanotubes and processes for obtaining these catalysts, as well as the carbon nanotubes obtained by the use of these catalysts.

The invention provides a method for constructing a chiral axis-containing planar chiral cyclophane compound by activating intramolecular asymmetric carbon-hydrogen bonds under the catalysis of cobalt, which comprises the following steps of: under the action of a cobalt catalyst, a chiral auxiliary agent and an additive, carrying out intramolecular asymmetric C-H activation reaction on alkynyl benzamide, and after the reaction is finished, separating the chiral axis-containing planar chiral cyclophane compound from the alkynyl benzamide to obtain the chiral axis-containing planar chiral cyclophane compound. Separating to obtain a planar chiral cyclophane compound containing a chiral axis; the synthesis of the planar chiral cyclophane compound containing the chiral axis is realized by a transition metal catalyzed asymmetric C-H activation method, the research technology of cheap transition metal catalyzed C-H activation is further developed, and meanwhile, the synthesis strategy of the planar chiral cyclophane compound containing the chiral axis is expanded; according to the present invention, the reaction substrate has characteristics of wide adaptability and strong product stereoselectivity, and the chiral control is achieved through the salicyl oxazoline so as to provide the high enantioselectivity and the high diastereoselectivity of the product; various planar chiral cyclophane compounds containing chiral axes are synthesized, the synthesis method is simple and convenient, the atom economy is good, and the synthesis efficiency is high.

The invention provides a catalyst, a preparation method and application thereof, and a method for preparing primary amine by catalyzing nitrile compound hydrogenation, and particularly relates to the technical field of catalyst synthesis. The catalyst comprises a nickel / cobalt-based catalyst and nickel / cobalt carbide coated on the surface of the nickel / cobalt-based catalyst, wherein the nickel-based / cobalt-based catalyst is selected from any one of a supported nickel / cobalt-based catalyst, a Raney nickel / cobalt catalyst or a nickel / cobalt nanocrystal; a carbon source used in the nickel / cobalt carbide is any one or a combination of at least two of a gaseous carbon source, a liquid carbon source and a solid carbon source. The catalyst not only has high activity and good selectivity, but also can inhibit agglomeration and sintering of nickel / cobalt and prolong the service life of the catalyst, so that the efficiency and selectivity of hydrogenation reaction are improved, side reactions are reduced, the production cost is reduced, and powerful support is provided for industrial application of hydrogenation.

The invention relates to the technical field of organic alcohol preparation, and discloses a method for preparing iso-tridecanol from Fischer-Tropsch olefin. The method comprises the following steps: (1) mixing a Fischer-Tropsch C6 fraction section, aluminum alkyl and a supported metal, and then introducing hydrogen into the obtained mixture for polymerization reaction to obtain isododecene; (2) mixing the isododecene, a cobalt catalyst and a diphosphine ligand, then introducing synthesis gas into the obtained reaction mixture, and carrying out hydroformylation reaction to obtain isotridecanal; and (3) in the presence of a hydrogenation catalyst, mixing the iso-tridecanal with hydrogen to carry out aldehyde hydrogenation reaction. The method has the characteristics of easily available raw materials, high conversion rate, good selectivity, high yield of iso-tridecanol, mild reaction conditions and relatively strong process stability, and the method is simple and convenient to operate and good in economic benefit, highly conforms to large-scale industrial production requirements, and shows remarkable economic value and wide industrial application prospects.

This invention belongs to the field of catalyst preparation and battery energy storage technology, and relates to a cobalt / molecular sieve catalyst. The preparation method of the cobalt / molecular sieve catalyst of this invention includes the following steps: S1: Dissolving the molecular sieve, then impregnating it in a cobalt-containing metal salt solution, sonicating, washing, and drying to obtain a precursor; S2: Grinding the precursor obtained in step S1, and calcining it at 300℃-600℃ for 2-5 hours under an inert gas atmosphere; subsequently, adding the calcined product and dopamine hydrochloride together to a citric acid buffer solution, sonicating, stirring, washing, and drying; S3: Grinding the dried product from step S2, and then using a high-temperature reduction process to confine the metallic cobalt through the pore structure of the molecular sieve, to obtain a molecular sieve-supported cobalt catalyst. This invention prepares a molecular sieve-supported cobalt catalyst and applies it to the membrane layer of a modified lithium-sulfur battery, resulting in excellent rate performance and stable cycle life for the lithium-sulfur battery.

The application discloses a preparation method of a tricobalt tetraoxide catalyst and application thereof, and relates to a preparation method of a tricobalt tetraoxide catalyst, which comprises the following steps: mixing positive electrode powder of a waste lithium cobalt oxide battery with a purified reagent, laying the mixture in a reaction device, and performing oxidation roasting treatment to obtain the tricobalt tetraoxide catalyst. The tricobalt tetraoxide catalyst is prepared by fully utilizing waste lithium ion battery materials on the market, the extraction rate and selectivity of cobalt elements are improved by improving the preparation conditions, the prepared tricobalt tetraoxide catalyst has equivalent catalytic performance as a commercial tricobalt tetraoxide catalyst, and can be used as a catalyst for degradation of organic wastewater. In addition, the method directly utilizes waste positive electrode materials to prepare high-efficiency catalysts, avoids use of expensive high-purity metal salts, realizes additional value utilization of waste, realizes low-cost preparation of high-value-added catalysts, and has important economic and social benefits.

The invention belongs to the technical field of organic synthesis, and discloses a method for synthesizing gamma-lactam derivatives through cobalt catalytic cyclization. The method comprises the following steps: in a protective atmosphere, taking an organic solvent as a reaction medium, and reacting a propyne compound with an isonitrile compound and a carboxylic acid compound under the action of a catalyst, a ligand and alkali to obtain the unsaturated gamma-lactam derivative. The catalyst is a cobalt catalyst, and the ligand is a nitrogen or phosphine compound. The method disclosed by the invention is simple, low in cost, efficient in reaction, few in byproducts, easy to separate and purify and high in yield.

The present invention relates to a method for the continuous hydroformylation of olefins with synthesis gas in the presence of a cobalt catalyst, wherein the method is automated by the use of APC control with at least three controlled variables A, B and C.

This invention relates to a method for synthesizing aromatic carbon-10 sulfur-containing compounds from isoprene. Specifically, using disulfide, isoprene, and 2-methyl-1-buten-3-yne as raw materials, aromatic carbon-10 sulfur-containing compounds are constructed under cobalt catalyst and iodine tandem catalysis. This invention has the following advantages: the raw materials are simple and readily available, the synthesis is simple, it is environmentally friendly, the conditions are mild, and it has high atom economy. The compounds obtained from the bulk chemical isoprene have structures similar to natural terpenes and represent an important class of terpenes.

The invention discloses a C3N4-based diatomic cobalt catalyst and a preparation method and application thereof, and the catalyst is uniformly dispersed on the surface of a C3N4 carrier in the form of cobalt atom pairs to form a diatomic active center with clear Co-Co coordination. The preparation method comprises the following steps: reacting cobalt salt with 2, 2 '-bipyridine and oxalic acid to generate a cobalt dimer complex, mixing the cobalt dimer complex with a C3N4 dispersion liquid, stirring, evaporating, and calcining in an air atmosphere to obtain a final product. Adjacent cobalt atoms are accurately anchored through a nitrogen coordination environment of C3N4, and diatomic sites with stable structures and electron coordination are constructed on the atomic scale. Structural characterization results prove that cobalt atoms are dispersed in a diatomic form and do not agglomerate. The catalyst shows excellent performance in electrocatalytic oxygen reduction reaction, the current density and H2O2 yield of the catalyst are obviously higher than those of monatomic cobalt and cobalt nanoparticle contrast samples, and the catalyst shows high activity, high selectivity and good structural stability.

The invention belongs to the technical field of spice raw material synthesis, and particularly relates to a synthesis method of methyl cis-dihydrojasmonate, which comprises the following steps: dissolving 1-heptyne in toluene, discharging into a first reaction tank, adding a cobalt catalyst, and discharging 1-bromine-ethylene and carbon monoxide gas into the first reaction tank; adding triphenylphosphine into a first catalyst recovery tank, discharging catalyst precipitates, and carrying out sectional distillation to distill, cool and recover 1-heptyne; absolute methanol is discharged into the layering tank; dimethyl malonate is discharged into a second reaction tank, sodium methoxide is slowly added, an addition reaction is carried out at the temperature of-5 DEG C to 0 DEG C, and then heating is carried out for a decarboxylation reaction; 4-bromo-dihydrojasmonic acid methyl ester obtained by distillation is discharged into a third reaction tank; and discharging methyl jasmonate with alpha, beta-double bonds into a fourth reaction tank for reaction. By simplifying the steps, improving the recovery rate of the catalyst and realizing continuous production, the problems of high cost, low yield, low recovery rate of the catalyst and the like in preparation of the methyl cis-dihydrojasmonate in the prior art are solved.