26results about How to "Good catalytic" patented technology

The invention relates to the technical field of waste plastic treatment, in particular to a waste plastic grading carbonization device and a waste plastic treatment method. The waste plastic grading carbonization device comprises a feeding hopper, a crushing device, a grinding device, a screening device, a catalyst self-adaptive proportioning device, a first spiral discharging machine, a first-stage carbonization chamber, a second-stage carbonization chamber, an activation chamber, a second spiral discharging machine, a solid product collecting device, a liquefaction device, a liquefied product collecting device, a cooling water circulating device and a third spiral discharging machine, a material returning bin and a tail gas treatment device. According to the invention, through the collaborative innovation of'grading carbonization 'and'catalyst self-adaptive proportioning device', the problems of incomplete and non-uniform carbonization of the waste plastics, inadequate utilization of gas products and the like in the pyrolysis process of the waste plastics are solved, and an industrial feasible path is provided for chemical recovery of the waste plastics; the device is reasonable in overall structural design and high in treatment energy efficiency, and continuous, sufficient and efficient pyrolysis and high-value conversion of the waste plastics are achieved.

The application provides a porous recrystallized silicon carbide-based catalytic module and a preparation method and application thereof, and belongs to the technical field of catalytic materials. The porous recrystallized silicon carbide-based catalytic module provided by the application comprises a carrier and an active component loaded on the carrier; the carrier is porous recrystallized silicon carbide; and the active component comprises a metal single active component and / or a metal oxide active component. The porous recrystallized silicon carbide-based catalytic module provided by the application has the carrier of porous recrystallized silicon carbide, high porosity, large specific surface area and excellent corrosion resistance, and has excellent catalytic effect and long service life.

This invention provides a fluorine-doped ZnIn2S4 photocatalyst, its preparation method, and its application. The fluorine-doped ZnIn2S4 photocatalyst has a spherical nanoflower structure, which is composed of nanosheets arranged in an array. The preparation method includes the following steps: (1) adding ZnCl2, InCl3·4H2O, and thioacetamide to water and stirring to obtain a mixture A; (2) adding a fluorine source to mixture A and mixing thoroughly to obtain mixture B; (3) subjecting mixture B to a hydrothermal reaction, separating the product after the reaction, washing, and drying to obtain the F-ZnIn2S4 photocatalyst. The fluorine-doped ZnIn2S4 photocatalyst exhibits highly efficient photocatalytic activity.

This invention discloses Au nanoparticles loaded with bimetallic compounds for photocatalysis and their preparation method, belonging to the field of photocatalytic materials technology. Preparation steps: S1: Tetrachloroauric acid, quaternary ammonium salt, and citric acid are added to a sodium borohydride solution and stirred at 25-120℃ for 1-3 hours to obtain solution A; solution B is prepared containing quaternary ammonium salt, tetrachloroauric acid, ascorbic acid, silver nitrate, and hydrochloric acid; solutions A and B are mixed and stirred at 25-50℃ for 1-15 hours to obtain Au nanoparticles; S2: Solution C is prepared containing quaternary ammonium salt, a first metal source, and ascorbic acid; solution D is prepared containing quaternary ammonium salt, a second metal source, NaOH, and ascorbic acid; Au nanoparticles are mixed with solution C and reacted at 40-80℃ for 1-5 hours; then the supernatant is removed by centrifugation, and solution D is added again, reacting for 1-5 hours to obtain Au nanoparticles loaded with bimetallic compounds. This invention enables controllable nanoparticle structure and allows for metal loading at different sites by adjusting synthesis parameters.

This invention belongs to the fields of catalytic chemistry and fine chemicals, and discloses a halogen-modified supported noble metal catalyst and its application in the synthesis of oxaragoli key intermediates. The catalyst uses alumina or modified alumina as a support, loads the active component (noble metal), and modifies its surface electronic structure through halide ions. The preparation method includes precursor conversion of the support, impregnation and reduction of the active metal, and post-modification and regulation of halide ions. The catalyst obtained by this invention exhibits excellent hydrogenation reduction activity and selectivity for compounds containing C=N or C≡N bonds under mild conditions. Under room temperature and low-pressure hydrogen conditions, this catalyst can efficiently catalyze the conversion of 2-fluoro-6-trifluoromethylbenzaldehyde oxime to the oxaragoli key intermediate 2-fluoro-6-trifluoromethylbenzylamine, showing promising industrial application prospects.

The application discloses a solar photo-thermal foam for treating salt-containing organic wastewater and a preparation method thereof. The application solves the problems of poor desalination effect, low degradation ability for organic pollutants, especially volatile organic pollutants, and easy concentration of organic pollutants in the bottom liquid in the process of treating salt-containing organic wastewater by solar photo-thermal treatment. The application comprises the following steps: preparing a photo-thermal foam by loading a copper-cobalt binary metal catalyst on a nickel-based metal foam, and using the photo-thermal foam to treat water in a device for treating salt-containing organic wastewater by solar photo-thermal treatment. The porous foam substrate is used to construct a high-performance photo-thermal foam with a special morphology, and under the synergistic action of a multi-metal catalytic system, efficient desalination and catalytic persulfate degradation of organic pollutants in the bottom liquid and condensate are realized in the process of treating salt-containing organic wastewater by solar photo-thermal treatment, so that high-quality pure water is obtained. In addition, the photo-thermal foam catalyst is simple to recover and can effectively inhibit metal leaching toxicity, and has good repeated stability.

The application discloses a chemical modified electrode for detecting furazolidone and an electrochemical detection method thereof, and relates to the technical field of electrochemical detection, and comprises the following steps: (1) preparation of longan carbon; (2) preparation of nitrogen-doped longan carbon material (NCs); (3) preparation of nitrogen-doped longan carbon-polydopamine material (NCs-PDA); (4) preparation of NCs-PDA / SPCE modified electrode; (5) electrochemical detection of FZD; and (6) characterization of NCs-PDA / SPCE. The chemical modified electrode for detecting furazolidone and the electrochemical detection method thereof use longan shells as a carbon source, chitosan and urea as nitrogen sources, and prepare a nitrogen-doped porous carbon material through a high-temperature carbonization method, combine polydopamine and a portable disposable screen-printed carbon electrode (SPCE), prepare an electrochemical modified electrode NCs-PDA / SPCE for detecting furazolidone, and establish an electrochemical rapid detection method for detecting furazolidone in animal-derived food based on the modified electrode.

The present application provides a method for preparing a glycidyl (meth)acrylate compound of Formula 1, the method comprising reacting a (meth)acrylate compound of Formula 2 with a glycidyl compound of Formula 3 to produce the glycidyl (meth)acrylate compound, the reaction being performed in the presence of a catalyst, the catalyst being a Lewis base compound. The method enables extremely excellent target product yield and purity to be achieved at low cost and simple steps, and successfully eliminates defects associated with prior art catalysts during the reaction process. Formula 1

The invention discloses a novel iron-nickel monatomic carbon nanofiber, a preparation method thereof and application of the novel iron-nickel monatomic carbon nanofiber in portable sensing detection of antibiotics. The novel iron-nickel monatomic carbon nanofiber is of a three-dimensional interconnected conductive network structure, a carbon nanofiber is used as a carrier, and iron and nickel monatomic are loaded on the carrier. According to the invention, two metals of iron and nickel are creatively used as templates, physical and chemical methods are comprehensively used, iron elements are uniformly loaded on the surface and inside of foamed nickel, and then the iron-nickel monatomic carbon nanofibers with a three-dimensional interconnected conductive network structure are successfully prepared through an optimized calcination process. Iron and nickel monatomic sites are synchronously anchored in a carbon nanofiber skeleton to form a double-active-center catalytic system.

This application discloses an asymmetric photocatalytic spirocyclic synthesis method for constructing chiral spirocyclic amines, belonging to the field of organic synthesis. This method utilizes a dual-catalyst system composed of chiral phosphoric acid (CPA) and fac-Ir(ppy)3 photosensitizer. Under visible light irradiation, using alkenylsulfonyl oximes I and vinyl azide II substituted with imine-nitro-aromatic hydrocarbons as starting materials, a series of imine-nitro-nitro-aromatic hydrocarbon-functionalized spirocyclic amines were synthesized in high yield and with high enantioselectivity. The key innovation of this invention lies in using a sulfonyl group to replace the traditional ester group to protect the nitrogen atom of the oxime. This improvement promotes the energy transfer (EnT) mechanism rather than the single electron transfer (SET) mechanism. In this way, the reaction efficiency is significantly improved, while providing an ideal reaction environment for chiral hydrogen bonding catalysis.

The application discloses a catalytic hydrogenation method of carbon nine resin, and is characterized in that the method comprises the following steps: (1) placing a Pd-W-Yb / silica gel-activated carbon co-precipitation catalyst in the front half of a fixed bed, placing a Co-Ru-Yb / silica gel co-precipitation catalyst in the rear half of the fixed bed, and reducing by hydrogen; (2) catalytically hydrogenating pretreated carbon nine resin in the fixed bed. Compared with the prior art, the catalytic hydrogenation method of carbon nine resin has high catalytic efficiency and simple process, and the catalytic hydrogenation method can obtain a product with good colority and low bromine value.

This invention relates to a high-capacity Mg-RE(Sm,Nd)-Ca-Cu-Zn hydrogen storage composite material catalyzed by K2TiF6+Nb2O5, belonging to the field of solid-state hydrogen storage materials technology. It solves one of the problems of existing magnesium-based hydrogen storage materials, namely, high thermodynamic stability, complex activation process, high hydrogen desorption temperature, and slow hydrogen absorption / desorption kinetics. This invention discloses a Mg-based solid-state composite hydrogen storage material, the composition of which is: Mg... 95‑x‑y Sm x Nd y Ca2Cu 3‑z Zn z +m wt.%(K2TiF6+Nb2O5), where x, y, and z are atomic ratios, and 0.5≤x≤2, 0.5≤y≤2, 0.2≤z≤3, m is the percentage of K2TiF6+Nb2O5 in the alloy, 4≤m≤10, the mass ratio of K2TiF6 to Nb2O5 is 1:1, the preferred atomic ratio is 1.5:1.5:0.8, m=6. This high-capacity Mg-RE(Sm,Nd)-Ca-Cu-Zn-based solid hydrogen storage composite material has high hydrogen absorption and desorption capacity and excellent hydrogen absorption and desorption kinetics; moreover, the preparation process is simple and easy to operate, suitable for large-scale preparation, and can be used as a hydrogen storage / hydrogen supply carrier in various scenarios.

The application provides a porous indium oxide catalyst and a preparation method and application thereof, and solves the technical problems of using multiple catalysts in the prior art step-by-step activation of carbon dioxide and hydrogen to prepare methanol, a complex catalyst system and a complicated preparation process. The application first controls the reaction temperature and reaction time through a simple one-step hydrothermal method in a strong alkali environment to prepare a cubic In(OH)3 precursor with uniform morphology, and then performs calcination and oxidation in an air atmosphere to convert the In(OH)3 into stable porous cubic structure In2O3.

The invention relates to the field of heterogeneous catalyst preparation, in particular to a metal-loaded Fischer-Tropsch synthesis catalyst and a preparation method and application thereof. The catalyst comprises an alumina carrier and Co3O4 nanoparticles, wherein the mass ratio of the Co3O4 nanoparticles to the alumina carrier is 1: (3.5-5); the average particle size of the Co3O4 nanoparticles is 8-12 nm, and the difference value between the minimum particle size and the maximum particle size of the Co3O4 nanoparticles is 5-10 nm; in a hydrogen temperature programmed reduction H2-TPR test, the temperature corresponding to the highest value of the first reduction peak of the catalyst is 250-350 DEG C, and the integral area of the reduction peak corresponding to the temperature of 100-400 DEG C accounts for 55-75% of the total integral area of all the reduction peaks. The particle sizes of Co3O4 nanoparticles in the catalyst are intensively distributed in an interval suitable for the Fischer-Tropsch synthesis reaction, and the catalyst has excellent catalytic performance when being used in the Fischer-Tropsch synthesis reaction.

The application relates to a Nb4N5-MgH2 composite hydrogen storage material and a preparation method thereof. The composite hydrogen storage material comprises Nb4N5 and MgH2, and the Nb4N5 accounts for 3wt.%-9wt.% in the composite hydrogen storage material according to the mass percentage. The preparation method comprises the following steps: (1) preparing a Nb4N5 catalyst, dissolving NbCl5 in anhydrous ethanol, adding ammonia water to generate a precipitate, washing and drying, and then calcining in an ammonia atmosphere to obtain a Nb4N5 catalyst powder; (2) mixing the Nb4N5 catalyst with MgH2, and preparing a composite hydrogen storage material through mechanical ball milling. In the ball milling process, stainless steel balls are adopted, argon is used as a protective atmosphere, the ball-to-material ratio is (10-40):1, the ball milling time is 5-12 hours, the rotating speed is 350-500 rpm, and positive and negative intermittent ball milling is adopted. The composite material prepared by the application has excellent hydrogen storage kinetic performance. Through the uniform distribution of the Nb4N5 catalyst and the stable phase structure thereof, the hydrogen absorption and release performance and the cycle stability of the hydrogen storage material are remarkably improved. The application is suitable for the hydrogen energy field.

This invention proposes a method for preparing and applying a cadmium sulfide-cobalt hydroxide-graphene photocatalyst. The method includes: first, preparing CdS nanocubes; then, sequentially adding a graphene oxide solution, CdS nanocubes, and cobalt nitrate hexahydrate to deionized water to obtain a mixed solution; finally, adding a solution containing trisodium citrate and hexamethylenetetramine to the mixed solution; and then sequentially subjecting the mixture to oil bath heating and freeze-drying to obtain a cadmium sulfide nanocube-cobalt hydroxide nanosheet array-graphene composite photocatalyst. This invention introduces dual auxiliary catalysts, combining CdS with GR and Co(OH)2 cocatalysts in an appropriate manner to promote charge separation / transfer and inhibit photocorrosion, thereby improving the overall photocatalytic hydrogen production coupled with benzyl alcohol oxidation to benzaldehyde performance, and effectively enhancing the performance of CdS.

The application discloses a preparation method of a dihydroxyethyl bisphenol A ether and belongs to the technical field of organic synthesis. The steps of the preparation method are as follows: bisphenol A, a mixed acetate catalyst and a solvent are added into a reaction kettle, nitrogen is replaced after stirring is started, the temperature is increased to a reaction temperature, then the reaction is started by introducing ethylene oxide, the temperature is kept after the ethylene oxide is added completely, the reaction is continued until the pressure does not decrease, the temperature is decreased to a desolventizing temperature, then desolventizing is carried out until no solvent comes out, and then the temperature is decreased, the gas is removed, and the product is discharged, so that the dihydroxyethyl bisphenol A ether is obtained; wherein the mixed acetate catalyst is composed of calcium acetate, magnesium acetate and barium acetate; and the solvent is methylcyclohexane. The preparation method has excellent catalytic effect, the prepared dihydroxyethyl bisphenol A ether has high content, low hydroxyl value and light color, and the solvent has small toxicity and is easy to recycle.

This invention discloses a water slag-based nitrate reduction catalyst and its preparation method, belonging to the field of ammonia synthesis technology. The catalyst preparation method includes pretreating water slag as a support, preparing a copper-cobalt mixed aqueous solution in a specific ratio, and preparing the water slag-based catalyst through co-precipitation, aging, and calcination. By utilizing inexpensive industrial waste residue to replace expensive support materials, combined with a simple co-precipitation process, low-cost and high-efficiency catalyst preparation is achieved, offering advantages such as low cost, simple process, environmental friendliness, and effective utilization of industrial waste residue. The synergistic effect among the components in the catalyst of this invention gives it high catalytic activity and stability, maintaining good catalytic performance under a wide range of reaction conditions.

The invention relates to the field of heterogeneous catalyst preparation, in particular to a Fischer-Tropsch synthesis catalyst, a preparation method thereof and a Fischer-Tropsch synthesis method. The catalyst comprises an alumina carrier with a fiber structure and Co3O4 nanoparticles dispersed in network gaps formed by the fiber structure, and the Co3O4 nanoparticles exist in the form of a Co3O4 nanoparticle aggregate; the mass ratio of the Co3O4 nanoparticles to the alumina carrier is 1: (3.3-5); in a hydrogen temperature programmed reduction H2-TPR test, the temperature corresponding to the highest value of the first reduction peak of the catalyst is 250-400 DEG C, and the integral area of the reduction peak corresponding to the temperature of 100-400 DEG C accounts for 50-70% of the total integral area of all the reduction peaks. The catalyst is used in a Fischer-Tropsch synthesis reaction, and the selectivity of by-product methane is reduced while a relatively high CO conversion rate is maintained.

The invention discloses a method for preparing crystalline phase aluminum phosphate at low temperature through evaporation-induced self-assembly and catalytic application of the crystalline phase aluminum phosphate, and relates to the technical field of catalyst preparation. The method comprises the following steps: adding a nitric acid aqueous solution and alkoxy aluminum into absolute ethyl alcohol, stirring and dissolving, then adding a phosphoric acid aqueous solution, and then carrying out pre-reaction to obtain a mixture; heating the mixture to evaporate the solvent to obtain a solid product; and calcining the solid product to obtain the crystalline phase aluminum phosphate, the molar ratio of the phosphorus element contained in the phosphoric acid aqueous solution to the aluminum element contained in the alkoxy aluminum is 1.5: 1; the calcining temperature is 550 DEG C. The crystalline phase aluminum phosphate catalyst prepared by the method provided by the invention has high reaction activity and product selectivity for catalyzing the reaction of formaldehyde and ethylene glycol acetal to synthesize 1, 3-dioxolame, and few by-products are produced.

This invention specifically relates to a method for preparing γ-butyrolactone by hydrogenation of 1,4-butanediol coupled with dehydrogenation of succinic acid. This method couples the hydrogenation reaction of succinic acid with the dehydrogenation reaction of 1,4-butanediol to prepare γ-butyrolactone in high yield. The reaction process is simple, improves the heat and mass transfer efficiency of the catalyst surface, simplifies the operation steps, reduces energy consumption, and saves product separation costs. The highest yield of γ-butyrolactone can reach 99.9%, making it suitable for large-scale industrial production.

This invention discloses a catalyst and its preparation method, as well as a method for preparing 6-methoxy-2-acetnaphthalene. The active component of the catalyst includes an inorganic metal salt, which comprises aluminum trichloride, ferrous chloride, and zinc chloride. The ratio of aluminum trichloride to ferrous chloride and zinc chloride is (7.5-17):(1.5-2):1. The catalyst of this invention can be used in the reaction for preparing 6-methoxy-2-acetnaphthalene, effectively increasing the yield of the 6-methoxy-2-acetnaphthalene product to over 85%, thus overcoming the problem of low product yield in existing methods for preparing 6-methoxy-2-acetnaphthalene.

This invention discloses a composite metal oxide single-atom catalyst, its preparation method, and its applications. The transition metal Mo is dispersed as isolated atoms on the metal oxide with a loading of 0.2-10 wt%. This catalyst has multiple active centers, including transition metal single atoms and solid acid-base sites, and exhibits excellent catalytic activity, selectivity, and stability in heterogeneous catalysis. It shows great promise for industrial applications, especially in the catalytic decomposition of lignin.

The invention relates to a preparation method of an all-solid-state lithium battery positive electrode material. According to the method, the polyaniline derivative and the organic sulfide are compounded, so that the compatibility of the polyaniline derivative and the organic sulfide is better than that of polyaniline, and the interaction of a molecular level is achieved. Part of nitrogen-substituted polyaniline is used, the alkalinity of the polyaniline is higher than that of polyaniline, a better catalytic effect on organic sulfides is achieved, and the positive electrode material with higher catalytic energy than that of polyaniline can be obtained. In an organic solvent such as N-methyl pyrrolidone, a composite solution of a polyaniline derivative and an organic sulfide is prepared, and conductive carbon black is added. The composite solution is coated or brushed on the surface of a current collector, such as copper, aluminum, platinum or stainless steel, so that the lithium secondary battery positive electrode with high specific energy is obtained. The method is simple to operate, is suitable for the field of high-specific-energy lithium batteries, and has a wide application prospect.

The invention provides an application of Mn-RuO2 in preparation of a medicine for treating cancer, wherein the cancer is pancreatic cancer. A photoelectrochemical test system proves that Mn-RuO2 has the performance expressions of remarkable fluorescence quenching, longest fluorescence lifetime, relatively low charge transfer resistance and strong photocurrent response, and shows that Mn-RuO2 has excellent carrier separation efficiency and low recombination efficiency. Under ultrasonic irradiation, Mn-RuO2 can effectively improve the hypoxic environment and enhance ROS generation, meanwhile, programmed para-apoptosis and pan-apoptosis signal channels in tumor cells are activated, and the synergistically enhanced anti-tumor effect is shown.