24 results about "Cyanuric acid" patented technology

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 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.

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.

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 application belongs to the technical field of plastic processing, and particularly relates to a cross-linked PVC pipe material with good heat stability and high strength and a preparation method thereof. The PVC pipe material is composed of the following raw materials: PVC resin, organic tin stabilizer, initiator, triallyl isocyanurate, polyethylene imine, impact modifier, thermal reversible cross-linking agent, auxiliary cross-linking agent, benzoyl chloride, acid absorbent, processing aid and composite lubricant. By grafting primary amine and secondary amine groups on the polyvinyl chloride molecular chain, reactive cross-linking is carried out in the pipe extrusion process, so that the strength of the pipe is greatly improved. Due to the presence of primary amine and secondary amine, chemical reaction with hydrogen chloride produced by PVC decomposition can be carried out, and at the same time, the hydrogen chloride is quickly neutralized with the acid absorbent, so that the decomposition of PVC material is effectively prevented, and the heat resistance of the pipe is improved. The prepared PVC pipe material has good heat stability, high strength and good low-temperature impact resistance.

The application discloses a nylon composite material, which comprises the following components in parts by weight: aliphatic nylon 60-80 parts; MCA flame retardant 15-35 parts; polyethylene glycol 5-10 parts; and polyether block amide 4-10 parts. The MCA with specific free cyanuric acid content is used in the application, and the MCA generates inert gas due to the high temperature generated by an electric arc in the IPT test, which is beneficial to the rapid outward diffusion of the electric arc. Meanwhile, the polyether block amide as a charge dissipating agent can reduce the electric arc energy and guide the rapid diffusion of the electric arc. Meanwhile, the introduction of the polyethylene glycol can improve the water absorption of the nylon composite material, and the electric arc diffusion is synergized, so that the IPT is further improved. Meanwhile, the nylon composite material has a flame retardancy of 0.8mm V-0.

This invention relates to a flotation depressant and flotation method for recovering copper from magnetically separated iron tailings, specifically in the field of mineral flotation technology. The flotation depressant comprises: sulfonated modified tannin, sodium cyanurate, carboxymethyl chitosan, and carbonates. The flotation depressant provided by this invention, through the synergistic effect of its components, achieves highly efficient selective inhibition of pyrite at a pulp pH of 8-9, while having no significant inhibitory effect on chalcopyrite. It is suitable for low-grade, fine-grained, disseminated magnetically separated iron tailings, yielding copper concentrate with a Cu grade ≥19.22% and a recovery rate ≥72.50%. This invention solves problems such as foaming and stickiness, equipment scaling, and difficulty in meeting alkalinity standards in traditional high-alkali lime processes. It has advantages such as low alkali content, high efficiency, and environmental friendliness, and has broad prospects for industrial application.

The application belongs to the technical field of methyl red azo dye purification, and discloses a methyl red azo dye adsorbent with good adsorption performance on methyl red azo dye, 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 liquid; under stirring, in-situ growth of a supramolecular aggregate is realized and the supramolecular aggregate is coated on the surface of the biomass carbon powder to form a solid-liquid mixture; the solvent in the solid-liquid mixture is removed, and the supramolecular composite precursor is obtained through drying; (3) pressure forming a mixture of the supramolecular composite precursor, a silicate clay mineral and a nickel salt into a green body; and (4) performing heat treatment on the green body to obtain the methyl red azo dye adsorbent.

The application discloses a kind of supermolecule self-decomposition template synthesis multi-element doped diameter adjustable carbon-based micropipe method, belong to carbon micropipe preparation technical field, operation steps are as follows: (1) respectively preparation containing melamine (M) or 2,4,6-triaminopyrimidine (TAP) solution A and containing cyanuric acid (CA) or trithiocyanuric acid (TCA) solution B;(2) A liquid drop is added to B liquid, and the supermolecule precursor of M-CA, M-TCA, TAP-TCA is obtained;(3) 2-methylimidazole and sulfur, boron, phosphorus, fluorine and other element compounds are added in the solution of precursor, and after heating and drying, the precursor composite with different diameters is obtained by drying in oven for 24h;(4) it is obtained by calcining at 500-700 DEG C for 1-2h under argon atmosphere;In the application, the synthesized supermolecule as a template has the advantages of self-decomposition, adjustable diameter, and can be partially converted into carbon-based materials;During preparation, adding appropriate drugs realizes multi-element doping in one step, and the method has the advantages of simplicity, low cost and large-scale preparation.

The application belongs to the technical field of cables, and particularly relates to a high-torsion-resistance and low-smoke PVC / TPU composite cable material and a preparation method thereof. The PVC and polyether TPU are used as main components of the cable material, the compatibility of the PVC and the polyether TPU is improved by adding a compatibilization aid, the mechanical strength of the cable material caused by phase separation is inhibited, the aluminum phosphate is uniformly loaded on the surface of nano silicon dioxide, the flame-retardant and smoke-suppressing agent is formed by polymerization of hexachlorocyclotriphosphazene and cyanuric acid to improve the flame-retardant performance of the cable material, the toughening filler is prepared by mixing fumed silica, cerium oxide and modified montmorillonite, the nano sheet structure can effectively block the penetration of water molecules to improve the water resistance of the cable material, and when the cable material is subjected to torsion deformation to generate microcracks, the toughening filler can prevent the rapid expansion of the cracks to improve the torsion resistance of the cable material. The composite cable material prepared by the application has excellent low-temperature resistance and water resistance, and can realize low-temperature torsion without damage.

This invention discloses an iron-carbon co-modified graphitic carbon nitride-based catalytic material, its preparation method, and its application. The invention involves dispersing melamine and acetamide in ethanol and stirring for 12 hours to obtain solution A; dispersing cyanuric acid and FeCl3·6H2O in ethanol and stirring for 12 hours to obtain solution B; mixing solutions A and B and stirring thoroughly; and then hydrothermally reacting the mixture at 180°C. The reaction product is washed until neutral, centrifuged, and dried to obtain a Fe / C-C3N4 precursor; the precursor is transferred to a tube furnace and calcined at 550°C for 2 hours to obtain the iron-carbon co-modified graphitic carbon nitride-based catalytic material. This catalytic material can be used for the photocatalytic degradation of antibiotic pollutants in water. This invention features a simple preparation process, low raw material costs, good environmental compatibility, and can efficiently and deeply purify antibiotic pollutants in water.

This invention provides a biochar-based Fe single-atom catalyst, its preparation method, and its application. The preparation method includes the following steps: calcining shrimp shells under a nitrogen or inert gas atmosphere to obtain biochar, followed by acid washing, cleaning, and drying to obtain biochar SO; dissolving melamine and cyanuric acid in DMSO to obtain solution A and solution B; dissolving ferric citrate in solution A and then adding it to solution B; stirring and reacting; filtering, washing, and drying to obtain supramolecular polymer MCA; mixing the obtained SO and MCA at a mass ratio of 1:0.25~1, grinding, and then co-pyrolyzing at 450-750℃ for 1-5 hours under a nitrogen or inert gas atmosphere, followed by cooling. The technical solution of this invention exhibits high catalytic activity, can efficiently catalyze the rapid degradation of aniline by PMS, is low in cost, has minimal environmental impact, and is safe, showing great application potential in the treatment of aniline-related wastewater.

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.

This invention discloses a bromine / cobalt co-doped hollow rod-shaped carbon nitride photocatalyst and its preparation method, belonging to the technical field of photocatalytic materials and CO2 resource utilization. The invention involves the self-assembly of melamine and cyanuric acid to form a supramolecular rod-shaped precursor, followed by thermal polymerization to obtain hollow rod-shaped carbon nitride (RCN). Using RCN as a support and cobalt nitrate and hexadecyltrimethylammonium bromide as doping sources, a hydrothermal reaction is then performed to prepare the bromine / cobalt co-doped hollow rod-shaped carbon nitride Br / Co-RCN photocatalyst. This catalyst exhibits a hollow rod morphology, a large specific surface area, and uniform doping of bromine and cobalt within the carbon nitride framework. The catalyst of this invention demonstrates excellent photocatalytic CO2 reduction performance under simulated sunlight, achieving a CO yield of 130.06 μmol·g. ‑1 ·h ‑1 Furthermore, the preparation process is simple, the conditions are mild, and the reproducibility is good, showing promising application prospects.

The application discloses a graphite carbon nitride-based Zn monatomic photocatalyst, and a preparation method and application of the photocatalyst.The graphite carbon nitride-based Zn monatomic photocatalyst is prepared by using thiourea and cyanuric acid as a nitrogen source and zinc hydroxide as a metal source through a one-step pyrolysis method.The prepared photocatalyst has better performance, lower preparation cost, simple steps and no solid or liquid waste in the synthesis process.Further, the catalyst has good degradation effect on phenol, and the highest degradation rate can reach 100%.

The application discloses a preparation method of an attapulgite / polymeric carbon nitride composite material, which comprises the following steps: (1) self-assembling of silane coupling agent modified attapulgite, melamine and cyanuric acid in a solvent to obtain a precursor; and (2) drying and calcining the precursor to obtain the attapulgite / polymeric carbon nitride composite material. Compared with the prior art, the attapulgite / polymeric carbon nitride composite material prepared by the method has excellent photocatalytic activity on the oxidative degradation reaction of tetracycline hydrochloride, and can be used as a photocatalyst for photocatalytic oxidative degradation treatment of tetracycline hydrochloride wastewater.

This invention relates to the field of optoelectronic materials technology, and discloses a method for preparing and applying a photothermal insulation material based on carbon-oxygen-doped carbon nitride. The preparation method includes mixing melamine and cyanuric acid to form a precursor mixed powder, adding D-glucose and deionized water and mixing evenly to obtain a precursor mixture; transferring it to a tilting homogeneous reactor and reacting it at 160°C for 6-12 h, naturally cooling to room temperature, filtering, washing and drying the filter cake to obtain the doped product; heating to 500-600°C and holding for 2 h to carry out a thermal condensation reaction, naturally cooling to room temperature, pulverizing, and sieving to obtain carbon-oxygen-doped carbon nitride powder.

The application provides a preparation method of a polyacrylate hydrogel film. Carbon nitride is uniformly dispersed in deionized water, nitrogen is used as a protective atmosphere, a neutralized sodium acrylate solution is added, and mixing is uniform; a certain amount of initiator ammonium persulfate and crosslinking agent N,N'-methylene bisacrylamide are added, and stirring is uniform; the above mixture is poured into a mold, polymerization is carried out at a certain temperature, and baking is performed; finally, the above prepared dry film is soaked in an electrolyte aqueous solution at room temperature to obtain a hydrogel electrolyte film. The carbon nitride used in the application is prepared by baking melamine, and a small amount of boric acid, oxalic acid or cyanuric acid is doped in the baking process to introduce a hydrophilic functional group into the carbon nitride to improve the dispersibility of the carbon nitride in water. The gel electrolyte film has a strong water retention capacity, a high ionic conductivity, can inhibit the uneven deposition and dendrite formation of zinc, and realizes the long cycle life of a zinc-air battery.

This invention discloses a simultaneous arsenic removal aid for gold stockpiles, comprising a core arsenic removal aid component and functional auxiliary components. The core arsenic removal aid component is sodium cyanate. The functional auxiliary components are selected from at least one of sodium cyanate, sodium hydroxide, sodium chloride, barium chloride, ferric chloride, sulfamic acid, disodium hydrogen phosphate, trisodium citrate, ferrous sulfate, and sulfuric acid. Sodium cyanate and the functional auxiliary components work synergistically to simultaneously remove arsenic and aid leaching of arsenic-containing materials in gold stockpiles during the cyanide leaching process. The advantages are high efficiency in arsenic removal, low toxicity and safety, compatibility with cyanide leaching processes, and controllable cost.

This utility model discloses a calcination system for producing cyanuric acid, comprising a calcination kiln, a dual-fuel burner, a hydrogen delivery pipe, a natural gas delivery pipe, an instrument gas delivery pipe, a blower, and a nitrogen delivery pipe. The outlet of the hydrogen delivery pipe is connected to the first fuel gas inlet of the dual-fuel burner, the outlet of the natural gas delivery pipe is connected to the second fuel gas inlet of the dual-fuel burner, the outlet of the instrument gas delivery pipe is connected to the first auxiliary combustion gas inlet of the dual-fuel burner, and the outlet of the blower is connected to the second auxiliary combustion gas inlet of the dual-fuel burner. Beneficial effects: This utility model discloses a calcination system for producing cyanuric acid, which realizes the resource utilization of hydrogen, reduces the consumption of natural gas, and thus reduces the production cost of cyanuric acid. It effectively avoids frequent damage to the bellows in the calcination kiln due to high flame temperature, ensuring the safe and stable operation of the hydrogen system.

This utility model relates to the field of cyanuric acid processing technology, and in particular to a continuous crushing device for cyanuric acid processing, comprising a frame, on which a processing device is mounted for cyanuric acid processing. The processing device includes: a crushing component, comprising a housing fixed to the top of the frame, a shaft rotatably mounted inside the housing, a cutter head fixed to the outer wall of the shaft, and an arc-shaped mesh fixed to the lower end inside the housing; a driving component on the crushing component for driving the shaft to rotate; and a collecting component inside the frame for collecting the crushed cyanuric acid; and a feeding component, comprising a mounting plate fixed to the top of the housing, a hopper fixed to the top of the mounting plate, and several first rotating drums rotatably mounted inside the front end of the hopper; the first rotating drums cooperate with second rotating drums to assist material flow, achieving uniform and stable feeding of cyanuric acid inside the hopper, reducing bridging or rat hole phenomena, and improving feeding smoothness.

The utility model discloses a kind of mixing device of sodium dichloroisocyanurate powder preparation, including tank body, chlorine inlet mechanism and cyanuric acid feed mechanism;Tank body: its upper end is fixedly connected with tank cover, and the whole of tank body and tank cover is provided with the mixing mechanism of left-right symmetrical distribution;Chlorine inlet mechanism: it includes gas inlet pipeline, excessive pipeline, gas pipe, gas outlet seat and porous cover, the middle part of the tank cover is equipped with gas inlet pipeline, the lower end of gas inlet pipeline is fixedly connected with excessive pipeline, the lower end of excessive pipeline is fixedly connected with gas outlet seat, and the gas pipe of evenly distributed fixedly connected between gas outlet seat and gas inlet pipeline, gas pipe is all located in the interior of excessive pipeline, the lower end of gas outlet seat is fixedly connected with porous cover;The mixing device of sodium dichloroisocyanurate powder preparation, chlorine enters tank body by multiple gas pipes, chlorine enters tank body more dispersed, and under the action of strong shear stirring, chlorine reaction is more sufficient.

The application discloses a nickel-iron-based electrothermal catalyst for oil fume purification and a preparation method and application thereof, and belongs to the technical field of catalysts. The method comprises the following steps: (1) under a solution environment, a chlorate of iron (III), a chlorate of nickel (II) and cyanuric acid are subjected to electrodeposition under a constant potential to form an iron-nickel organic framework material; and (2) the iron-nickel organic framework material is calcined in an air atmosphere to obtain the nickel-iron-based electrothermal catalyst for oil fume purification. The raw materials of the preparation process are easy to obtain, and the method is simple. The prepared catalyst has the advantages of rich active sites and high catalytic activity. In application, as a catalytic material for kitchen oil fume, the catalyst utilizes the Joule heating effect of an electric current, has a fast temperature rising rate and a uniform temperature distribution, and avoids problems of sintering and coking caused by uneven local heating and other inactivation problems. The application effectively avoids the shortcomings of traditional physical kitchen oil fume treatment methods, is more beneficial to the environment and human health, and has a good application prospect and economic benefits.

The application discloses a cobalt monatomic catalyst with controllable loading and coordination configuration and a preparation method and application thereof, relates to the technical field of material engineering and environmental engineering, and the catalyst is prepared by the following method: organic ligands (oxalic acid, ethylenediaminetetraacetic acid, citric acid and the like) are respectively combined with cobalt acetate tetrahydrate to form cobalt-containing complexes, then the cobalt-containing complexes are combined with cyanuric acid and melamine to perform hydrogen bond assembly, and a supramolecular solid is constructed; then pyrolysis is performed under an argon atmosphere; by means of the anchoring mode and the difference between the internal sites of the carbon nitride carrier, the cobalt monatomic catalyst with controllable coordination configuration is prepared; by means of ligand complexation, ion replacement and carrier modification strategies, the cobalt monatomic catalyst with controllable cobalt loading and nitrogen / carbon structure is constructed, the coordination environment of cobalt sites is essentially optimized, the non-radical selectivity generation capacity is improved, and a green, efficient and beneficial technical scheme for improving the biodegradability is provided for the treatment of wastewater containing chlorophenol pollutants.