154 results about "Cyanuric acid" patented technology

The invention discloses a preparation method and application of an iron carbide nanoparticle modified carbon-based Fe monatomic catalyst, in the preparation process, Fe < 3 + > is complexed with oxalic acid in advance to realize coordination self-assembly and effectively inhibit hydrolysis of Fe < 3 + >, and glucose is used as a carbon-based carrier precursor and a reducing agent to prepare a carbon-based Fe monatomic catalyst. According to the preparation method, the self-assembled iron species are converted into Fe3C nanoparticles at a high temperature, melamine and cyanuric acid are used as N sources to realize N-doped carbon and anchor part of the iron species to form Fe monatomic atoms, and in addition, oxalic acid, melamine and cyanuric acid are easy to decompose at the high temperature to generate small-molecule gas, so that glucose forms a porous carbon structure during high-temperature carbonization, and the porous carbon structure is formed. Finally, Fe3C and Fe monatomic synergistic coexistence hierarchical porous N-doped composite carbon-based catalyst is achieved, the obtained catalyst can efficiently activate peracetic acid and degrade phenol organic pollutants, and the catalyst is simple in preparation process, good in catalytic effect and high in stability and has wide application potential.

The invention belongs to the technical field of flame-retardant master batches, and particularly relates to a flame-retardant master batch for polypropylene and a preparation method thereof.The preparation method comprises the steps that tris (2-hydroxyethyl) isocyanurate is heated and molten, tetrabutyl titanate and DOPO-DPP are added into the molten tris (2-hydroxyethyl) isocyanurate, the mixture reacts for 3-4 h, melamine and cyanuric acid are added into the molten tris (2-hydroxyethyl) isocyanurate, the mixture reacts for 30 min, cooling and smashing are conducted, and a macromolecular flame retardant TDMC is obtained; the preparation method comprises the following steps: carrying out ester exchange reaction on 2, 4-diphenyl-6-[2-hydroxy-4-(ethoxycarbonyl methoxy) phenyl]-1, 3, 5-triazine and 2, 2, 6, 6-tetramethyl piperidinol to prepare a free radical capturing agent; the polypropylene, the TDMC, the free radical scavenger and the zeolite are put into a high-speed mixer to be stirred and mixed, and then extrusion granulation is performed. The macromolecular flame retardant TDMC is adopted, the molecular weight of the macromolecular flame retardant TDMC is large, the water resistance is good, and the compatibility and damp-heat stability of the flame-retardant master batch in polypropylene are improved.

The invention belongs to the technical field of methyl red azo dye purification, and discloses a methyl red azo dye adsorbent with good adsorption performance on a methyl red azo dye adsorbent, and a preparation method and application thereof. The preparation method comprises the following steps: (1) preparing a first precursor solution and a second precursor solution; the first precursor solution contains melamine, and the second precursor solution contains cyanuric acid and / or barbituric acid; (2) sequentially adding the first precursor solution and the second precursor solution into biomass carbon powder to form a reaction solution; enabling the supermolecule aggregate to grow in situ and coat the surface of the biomass carbon powder under a stirring condition to form a solid-liquid mixture; removing the solvent in the solid-liquid mixture, and drying to obtain a supramolecular composite precursor; (3) carrying out pressure molding on a mixture of the supramolecular composite precursor, silicate clay mineral and nickel salt to obtain a green body; and (4) carrying out heat treatment on the green body to obtain the methyl red azo dye adsorbent.

The application discloses oligomerization degree carbon nitride nanosheet containing partial supramolecular chains and a preparation method and application of photocatalytic decomposition of water to simultaneously produce hydrogen and oxygen, and the preparation method comprises the following steps: adding melamine and cyanuric acid into a solvent, stirring after ultrasonic treatment, and drying to obtain supramolecular precursor powder; and calcining the supramolecular precursor powder to obtain oligomerization degree carbon nitride containing partial supramolecular chains. The application retains partial supramolecular oxygen-containing structures to optimize adsorption and dissociation of oligomerization degree carbon nitride nanosheet and water molecules at a reaction liquid interface, realizes high H and OH enrichment of a local environment, and promotes performance improvement of photocatalytic complete decomposition of water.

The invention relates to an environment-friendly gold leaching agent and a gold leaching method, and belongs to the technical field of gold leaching. The environment-friendly gold leaching agent comprises sodium cyanurate and guanidine salt. The gold leaching agent provided by the invention has a good gold leaching effect, is high in gold selectivity, does not contain traditional highly toxic sodium cyanide, is small in environmental pollution, and is green and environment-friendly.

The application discloses a nitrogen-doped carbon-coated three-metal catalyst and a preparation method and application thereof, and belongs to the field of catalyst preparation and application. The method adopts sucrose, melamine and metal salt as low-cost raw materials, and forms an alkaline environment with the assistance of sodium hydroxide. In the environment, melamine is hydrolyzed into cyanuric acid, which is complexed with sucrose metal ions to form a stable supramolecular aggregate precursor containing metal, and then realizes effective encapsulation of the metal in a high-temperature pyrolysis process. The synergistic effect of the three metal elements Co, Ni and Zn significantly improves the performance of the catalyst, so that CoNiZnO@NC-600 not only exhibits high conversion rate (98.4%) and selectivity (99%) in the reaction of hydrogenation conversion of furfural to furfuryl alcohol, but also has excellent cycle stability, thereby providing a new efficient method for the hydrogenation conversion of biomass-derived compounds.

The application discloses an indoor moisture-proof and water-resistant gypsum board and a preparation method thereof, and belongs to the technical field of gypsum board preparation. The preparation method of the indoor moisture-proof and water-resistant gypsum board comprises the following steps: S1, uniformly mixing building gypsum, modified fluorite gypsum, deionized water, a polyester adhesive, a composite water reducing agent, blast furnace slag powder and the like to obtain a gypsum slurry; S2, paving the gypsum slurry on a first layer of cover paper, paving a second layer of cover paper on the gypsum slurry, and performing compaction, final setting, drying and solidification to obtain the indoor moisture-proof and water-resistant gypsum board. The composite water reducing agent is obtained by the reaction of ethyl vinyl ether, trichlorofluoroethylene and allyltrimethoxysilane. The polyester adhesive is obtained by the reaction of allyl alcohol, phthalic anhydride and triallyl cyanurate. The prepared gypsum board not only has good moisture-proof and water-resistant performance, but also has good mechanical properties, thereby prolonging the service life and ensuring the quality of the gypsum board to a certain extent.

The application discloses a kind of low-noise water disaster resistant asphalt mixture and preparation method thereof, it is related to bitumen technical field.The mixture is composed of modified basalt porous ceramic hybrid aggregate and self-repairing gel modified asphalt material composite;Among them, modified basalt porous ceramic hybrid aggregate is crushed after basalt ore, by the synergistic effect of foaming agent, cosolvent, in the vacuum gradient sintering, carbon dioxide is inhaled to optimize pore structure, then by pickling, plasma activation and polyurethane impregnation strengthen mixed aggregate and filler are prepared;Self-repairing gel modified asphalt is three (2-mercaptoethyl) cyanuric acid ester as precursor, by thiol-epoxy click chemistry reaction to form crosslinked gel network, then with matrix asphalt composite;The scheme is through the acoustic wave dissipation of porous ceramic, hydrophobic interface and the dynamic self-repairing synergistic effect of gel network, significantly improve the water disaster resistance and noise reduction performance of mixture.

The utility model relates to tail gas purification technical field especially is a cyanuric acid synthetic reaction tail gas purification device, including the box, be provided with filter equipment on the box and be used for tail gas filtration, filter equipment includes: installation component, including the frame fixed in the inside of box, the front of upper and lower both ends of frame all is seted up and is inserted to install the composite catalytic filter core in the inside of frame, fixed component, including the fixed frame of installation in the inside front of frame, the inside intermediate rotation of fixed frame is installed with gear, the both ends of fixed frame inside left and right are all fixed with guide rod, the sliding installation of sleeve of guide rod is equipped with rack, the fixed plug rod is equipped with on the rack, the other end of plug rod is fixed with the bolt and is matched with the jack, the spring of sleeve installation is equipped with on guide rod, the front end fixed of gear has the knob, through fixed component and fix the composite catalytic filter core in installation component, significantly shorten the composite catalytic filter core replacement time, improve equipment operation efficiency.

The application discloses a kind of iron monatomic catalysts with controllable sulfur content and coordination mode and its preparation method and application, nitrogen-allyl thiourea and thiocyanic acid are respectively used as sulfur-containing organic ligand and sulfur-containing supramolecular precursor, chelate with iron ion, and use the hydrogen bond interaction between melamine and cyanuric acid, complete supramolecular self-assembly process;And high-temperature pyrolysis is carried out under argon atmosphere, and iron monatomic catalysts with controllable sulfur content and coordination mode can be prepared.The application also includes the application of iron monatomic catalysts with controllable sulfur content and coordination mode in removing organic pollutants such as p-chlorophenol and antibiotics in water.Iron monatomic catalysts with controllable sulfur content and coordination mode can improve the activation efficiency of persulfate, the content and selectivity of active oxygen species generated, and achieve efficient degradation of p-chlorophenol under different anion-cation, humic acid and pH conditions, while having good recycling performance.

The invention provides a low-platinum catalyst, a preparation method and application of the low-platinum catalyst in water electrolysis hydrogen production. Dispersing melamine and cyanuric acid in a certain proportion in absolute ethyl alcohol, adding the transition metal precursor solution, continuously stirring, heating, continuously reacting, cleaning, filtering, drying and grinding to obtain first solid powder; the first solid powder is placed in inert gas for carbonization treatment, and second solid powder is obtained; and dispersing the second solid powder in deionized water dissolved with a noble metal precursor, stirring for reaction, cleaning, filtering and drying to obtain the low-platinum catalyst. And the content of Pt in the catalyst is 0.1-10 wt%. The prepared low-platinum catalyst has excellent hydrogen evolution performance, the usage amount of precious metal can be effectively reduced, and the utilization efficiency of the precious metal is improved; the preparation method is simple in preparation procedure and relatively low in cost, can realize batch preparation, and has excellent market value and economic value.

The invention discloses an electronic-grade cyanate ester prepolymer as well as a preparation method and application thereof. The preparation method comprises the following steps: in a protective atmosphere, melting a cyanate ester monomer at 140-160 DEG C, adding a catalyst, continuously stirring and reacting for 6-10 hours, cooling to 110-120 DEG C, or cooling to 60-75 DEG C, and adding a low-boiling-point solvent to prepare an electronic-grade cyanate ester prepolymer; wherein the catalyst comprises polyhydroxy alkyl melamine and / or polyhydroxy alkyl cyanuric acid. The cyanate ester prepolymer with excellent performance can be prepared under mild conditions, and the cyanate ester prepolymer has wide application prospects in the fields of electronic packaging substrates, copper-clad plates and aerospace.

The invention relates to a flame retardant for polyester fibers and a preparation method thereof, and relates to the technical field of flame retardant synthesizing.The preparation method comprises the following steps that pre-dispersion and activation are conducted, specifically, water and melamine are added into a reaction kettle, stirring is conducted to obtain a uniform suspension, and then a water-soluble polymer is added into the suspension; complex reaction: slowly heating and stirring; regulating and controlling coprecipitation and crystallization: slowly adding cyanuric acid into the reaction kettle, and then heating and stirring for reaction to obtain slurry; after the reaction is finished, cooling the slurry, adding a wetting dispersant, stirring, conveying to a centrifugal spray dryer for drying, and collecting to obtain the flame retardant. The flame retardant for the polyester fiber, prepared by the preparation method disclosed by the invention, has the advantages of relatively small particle size, excellent dispersity, efficient flame retardance, high thermal stability and excellent processability.

The invention discloses a preparation method and application of a monatomic copper feed additive, and the preparation method comprises the following steps: step 1, preparing a mixed solution A, putting melamine and copper nitrate into a sufficient dimethyl sulfoxide solution, and uniformly stirring to obtain a light green solution; step 2, preparing a mixed solution B, putting cyanuric acid into a sufficient dimethyl sulfoxide solution, and uniformly stirring to obtain a clear transparent solution; 3, mixing the mixed solution A and the mixed solution B, and reacting to obtain a precipitate; 4, filtering, washing and drying the precipitate to obtain a precursor; 5, under the inert atmosphere, the precursor is subjected to heat treatment, and the monatomic copper catalyst is obtained; the prepared monatomic copper feed additive is used in broiler feed. The monatomic copper feed additive is prepared, belongs to nano-enzyme, and has remarkable effects of resisting escherichia coli and reducing ammonia in chicken manure when being used for broiler chicken feeding.

The application discloses a preparation method of a sheet structure cyanuric acid / melamine composite. The method comprises the following steps: adding an inhibitor, cyanuric acid and melamine in water, reacting at a temperature of 90-98 DEG C for 2-4 hours, and then filtering, washing and drying to obtain the sheet structure cyanuric acid / melamine composite, wherein the molar ratio of the cyanuric acid and the melamine is (0.95-1.05):1, and the mass ratio of the total amount of the cyanuric acid and the melamine, the inhibitor and water is 1:(0.005-0.007):(2-5), and the inhibitor is a sodium naphthalene sulfonate formaldehyde polycondensate, a polydiallyldimethylammonium chloride and a melamine polyphosphate with a mass ratio of 3:(1-2):(1-2). The method can prepare the sheet structure cyanuric acid / melamine composite, the particle size of which reaches the nanometer level, the dispersibility is good, and the flame retardancy is good.

The invention discloses an indoor moisture-proof and water-resistant gypsum board and a preparation method thereof, and belongs to the technical field of gypsum board preparation. The preparation method of the indoor moisture-proof and water-resistant gypsum board comprises the following steps: S1, uniformly mixing building gypsum, modified fluorgypsum, deionized water, a polyester adhesive, a composite water reducing agent, blast furnace slag powder and the like to obtain gypsum slurry; s2, the gypsum slurry is flatly laid on the first layer of surface protection paper, the second layer of surface protection paper is flatly laid on the gypsum slurry, compaction, final setting and drying curing are conducted, and the indoor damp-proof and water-resistant gypsum board is prepared; wherein the composite water reducing agent is obtained by carrying out a reaction on ethyl vinyl ether, trichlorofluoroethylene and allyl trimethoxy silane; the polyester adhesive is obtained by reaction of allyl alcohol, phthalic anhydride and triallyl cyanurate; the prepared gypsum board not only has good moisture-proof and water-resistant performance, but also has good mechanical performance, the service life of the gypsum board is prolonged to a certain extent, and meanwhile the quality of the gypsum board is guaranteed.

A multifunctional detection test kit includes a water test paper including a base and a plurality of test modules provided on different test zones of the base. Each of the test modules is configured to detect one of pH value, total alkalinity, cyanuric acid, total chlorine, bromine, free chlorine water hardness, lead, iron, copper, nitrite, nitrate, MPS, nickel, and phosphate.

The invention discloses a multifunctional ultra-small nano-silver material and a preparation method and application thereof. The preparation method comprises the following steps: self-assembling melamine and cyanuric acid through hydrogen bonds to form a three-dimensional network template; adsorbing and confining silver ions in the template; glucose is used as a green reducing agent, limited-range silver ions are subjected to in-situ reduction under the heating condition, and finally the nano-silver material is obtained through aftertreatment. Through a unique self-assembly template method, controllable preparation of superfine and high-dispersion nano-silver with the average particle size of about 2 nanometers is successfully achieved. The material has excellent antibacterial performance and excellent mimetic peroxidase activity, the performance of the material is far superior to that of nano-silver prepared through a conventional method, and the material has wide application prospects in the fields of biomedicine, catalytic sensing, environmental governance and the like. The method is simple in process, environmentally friendly and low in cost, and has remarkable industrialization potential.

The invention relates to an oxygen-doped carbon nitride photo-anode and a preparation method and application thereof, and belongs to the technical field of photoelectrochemical cathode protection. The preparation method of the oxygen-doped carbon nitride photo-anode comprises the following steps: dissolving melamine and cyanuric acid in a solvent I to obtain a precursor solution, centrifuging the precursor solution, collecting precipitate, washing the precipitate, and drying to obtain a precursor; mixing the precursor with a solvent II to obtain slurry, coating a substrate with the slurry, and drying to obtain a precursor film; and calcining the precursor film and melamine in inert gas to obtain the composite material. According to the oxygen-doped carbon nitride photoanode and the preparation method thereof, the carbon nitride photoanode with different oxygen doping amounts is obtained by regulating and controlling the proportion of cyanuric acid to melamine, and the oxygen-doped carbon nitride photoanode is prepared by introducing part of an oxygen-containing structure into a carbon nitride skeleton through condensation and rearrangement of cyanuric acid and amino while the completeness of the carbon nitride triazine skeleton is kept.

The utility model discloses a cyanuric acid production crude product crushing device which comprises a processing box, one side of the top end of the processing box is fixedly communicated with a feeding hopper, first hinge seats are fixedly arranged in the middles of the two sides of the inner wall of the feeding hopper, sealing plates are hinged to the middles of the two first hinge seats, and third hinge seats are fixedly arranged at the bottom ends of the two sealing plates. According to the crude product smashing device for cyanuric acid production, the two third hinge seats are pushed to move through the two electric telescopic rods respectively, so that the two sealing plates rotate through the two first hinge seats respectively till one ends of the two sealing plates make contact with each other, and the two ends of the two sealing plates make contact with each other; and air in the dust collecting box is pumped out through the air pump, so that negative pressure is generated in the dust collecting box and the guide pipe, dust generated by smashing is collected through the dust collecting cover, and the situation that the dust flies and pollutes the environment is avoided.

The invention discloses a preparation method of a water-resistant biomass-based long-afterglow phosphorescent material as well as a product and application of the water-resistant biomass-based long-afterglow phosphorescent material, and belongs to the technical field of functional materials. The preparation method comprises the following steps: taking lignin (soluble components subjected to ethanol grading treatment) and urea as raw materials, dissolving the raw materials in deionized water according to a specific proportion, adjusting the pH value to be alkaline, and carrying out microwave heating to obtain the product. Rhodamine B is added to prepare the red afterglow material. The product shows blue, green and red afterglow under excitation of different ultraviolet lights, and has long afterglow life and excellent water resistance through a hydrogen bond network and a chemical crosslinking structure formed by cyanuric acid. The material is simple and convenient to prepare, low in cost and sustainable, can be applied to the fields of anti-counterfeiting identification, information encryption storage and the like, and can also be compounded with guar gum to be used for 3D printing functional components.

This invention provides a method for preparing a carbon-doped carbon nitride photocatalyst, comprising the following steps: (1) melamine, cyanuric acid, and 2,4,6-triaminopyrimidine are mixed in a solvent, ultrasonically dispersed, and stirred for 12–36 h. The mixture is then washed, centrifuged, and dried. After grinding and sieving, a solid supramolecular precursor is obtained. (2) The solid supramolecular precursor obtained in step (1) is placed in air, heated to 300°C–500°C, and calcined for 2–6 h to form a mixture of carbon-doped melamine, cyanuric acid, and their oligomers. (3) The mixture obtained in step (2) is thoroughly mixed with molten salt, calcined at 500°C–600°C for 2–6 h, cooled, and thoroughly washed with deionized water to remove the mixed salt. The solid residue is separated and dried to obtain the carbon-doped carbon nitride photocatalyst. The prepared carbon-doped carbon nitride photocatalyst is simple to synthesize, structurally stable, and exhibits excellent separation and migration efficiency of photogenerated carriers, as well as excellent photocatalytic hydrogen peroxide production performance.

The invention discloses a cobalt-sulfur co-doped heterogeneous carbon electrocatalyst, a preparation method thereof and application of the cobalt-sulfur co-doped heterogeneous carbon electrocatalyst in electrocatalytic synthesis of hydrogen peroxide in a full pH range. The preparation method comprises the following steps: dissolving melamine, thiourea and Co (Ac) 2.4 H2O in DMSO, and stirring to obtain a solution A; dissolving cyanuric acid in DMSO (dimethylsulfoxide) to obtain a solution B; slowly pouring the solution B into the solution A, stirring, centrifuging, washing with water, and drying in vacuum; and transferring the obtained intermediate into a tubular furnace, and calcining in a nitrogen atmosphere to obtain the Co-S-MCA. Co-S-MCA is dispensed on GDE to obtain a Co-S-MCA / GDE modified electrode, and under the action of a flow cell system and specific additional bias voltage, the yield of H2O2 reaches up to 302.5 mM after catalytic reaction of the catalyst is carried out for 5 h; the method has the advantages that stable H2O2 yield and current response can still be kept after continuous catalytic reaction for 18 hours, the quality of the finally obtained H2O2 is about 606.1 mg, and a green synthesis route and a sustainable technology are provided for H2O2 production. The method disclosed by the invention has the characteristics of simplicity, convenience, high efficiency and low cost, and can be applied to electro-catalytic synthesis of H2O2.

The invention relates to the preparation of melamine cyanurate with low residual melamine. The present invention relates to a process for the preparation of melamine cyanurate, comprising the steps of: a) mixing solid melamine and solid cyanuric acid in a molar ratio in the range of 1.0: 1.0 to 1.0: 1.2 to produce a reaction mixture; b) continuously adding water to the reaction mixture at a temperature of 80 DEG C to 110 DEG C until a solids content of 72 wt% to 89 wt% is reached to form melamine cyanurate; c) maintaining the temperature of the melamine cyanurate at 40 DEG C to 100 DEG C for at least one hour; and d) drying the melamine cyanurate. The invention further relates to melamine cyanurate obtainable by a process for the preparation of melamine cyanurate, wherein the melamine cyanurate comprises less than 0.1 wt% residual melamine and is free of any additives.

The present disclosure is generally related to the fields of biology, inorganic chemistry, organic chemistry, molecular biology, enzymology, chlorinated water treatment processes and the like. More particularly, certain embodiments are related to reducing cyanuric acid concentrations in aqueous liquids, such as chlorinated swimming pool water, chlorinated hot tub water and the like.

The invention discloses a composite systemic bactericidal composition and application thereof in response to curved-surface water, fertilizer and pesticide regulation in pepper planting, and belongs to the technical field of pesticide bactericides. The composition is formed by compounding kasugamycin, chloroisobromine cyanuric acid and metalaxyl-hymexazol according to a specific mass ratio, water and fertilizer application parameters such as the irrigation amount, the fertilization amount and the pesticide application amount are optimized in combination with a response curved surface, cooperative prevention and treatment of pepper root rot are achieved, and water and fertilizer resources are efficiently utilized. The control effect is higher than that of a single agent, the dosage is small, and the bactericidal spectrum is expanded. The problems of resource waste and environmental pollution caused by a traditional large-water and large-fertilizer mode are remarkably relieved while high yield and high quality are guaranteed. The composite systemic bactericidal composition is applied to pepper planting response curved surface water, fertilizer and pesticide regulation, the pepper yield and the water and fertilizer utilization efficiency are improved, the disease index of root rot is remarkably reduced, and the contradiction between resource waste and frequent diseases in a traditional mode is solved.

The invention relates to a preparation method and application of an atomic-scale dispersed cobalt-doped three-dimensional hollow sphere carbon nitride material. According to the method, a unique three-dimensional hollow sphere carrier structure is constructed through supramolecular self-assembly and subsequent pyrolysis of melamine and cyanuric acid, atomic-scale dispersion of cobalt species is successfully realized by adopting a low-concentration cobalt salt solution, and a stable Co-Nx coordination center is formed. According to the catalyst, the high specific surface area and rich alkaline sites of the carrier are fully utilized, efficient adsorption of CO2 is achieved, and in-situ adsorption activation and efficient catalytic conversion of CO2 are achieved through the synergistic effect of atomic-scale dispersed Co < 2 + > sites serving as Lewis acid sites and the alkaline sites of the carrier. The catalyst obtained by the invention shows high activity and excellent stability in CO2 cycloaddition reaction, and the preparation process is simple.

The invention belongs to the technical field of powder coatings, particularly relates to a fluorine-free sand texture agent and a sand texture type powder coating, and further discloses a preparation method and application of the fluorine-free sand texture agent and the sand texture type powder coating. According to the fluorine-free sand texturing agent disclosed by the invention, the sand texturing agent is obtained by adopting n-butyl acrylate, methyl methacrylate, oleamide, 2-furan methacrylic acid, acrylic acid and triallyl cyanurate as monomers for copolymerization, the acid value of the product is 118-134mgKOH / g, and the glass transition temperature reaches 108-120 DEG C; therefore, when the powder coating is cured, matting and sand textures with excellent effects are generated.

This invention discloses a highly efficient method for synthesizing cyanuric acid in the field of green chemistry and chemical engineering. The method uses urea as a raw material and reacts it in a decahydronaphthalene solvent under the catalysis of a phosphotungstic acid-confined three-dimensional ordered macroporous alumina solid acid catalyst. Specifically, urea, solvent, and catalyst are mixed and heated under nitrogen protection. After cooling, filtration, and solvent washing, the resulting filter cake is separated from the crude product by stirring with hot water. The separated catalyst is dried and can be recycled. The filtrate containing the product is cooled, crystallized, filtered, washed, and dried to obtain high-purity cyanuric acid. The catalyst used in this method is prepared using a template method and confinement technology, exhibiting a stable structure and significantly inhibiting the loss of active components. This invention features a simple and efficient process, easy catalyst recovery and recycling, and high product yield and purity, demonstrating promising prospects for industrial application.

The invention discloses a thin-layer iron monatomic catalyst for efficiently degrading intracellular resistance genes and application, and relates to the technical field of material engineering and environmental engineering. The preparation method comprises the following steps: firstly, carrying out graded assembly on ferric oxalate, cyanuric acid and melamine according to a hydrogen bond acting force sequence to construct a supramolecular solid; by utilizing the low-boiling-point characteristic of a small-molecular alcohol compound, interlayer intercalation and stripping are realized by adopting a condensation reflux device, and a supramolecular precursor is obtained; and then pyrolyzing in argon to prepare the iron monatomic catalyst with controllable layer number. The iron monatomic catalyst with high loading capacity and a thin-layer structure is constructed through a strategy of oxalic acid bridging coordination and intercalation stripping, the exposure rate of active sites and the accessibility of a reaction substrate are essentially improved through the design, and a new material and a new technical scheme are provided for efficient and stable removal of intracellular resistance genes.