4666results about "Physical/chemical process catalysts" patented technology

The invention discloses a catalyst used for preparing acrylic acid and butyl ester by the dehydration of butyl lactate and a preparation method thereof. The catalyst is a composite catalyst, comprising a main catalyst A and auxiliary catalysts B, C, D and E, wherein, A is calcium sulphate, B is sulphuric acid, C is phosphate, D is alkaline matter and E is promoter. The preparation method comprises the steps as follows: five compositions A, B, C, D and E are sufficiently mixed, baked for 2-10 hours at the temperature of 200-800DEG C and formed for standby. The catalyst has high catalytic activation; under the catalysis of the catalyst, the molar yield reaches 75.1 percent and the molar selectivity of the acrylic acid and butyl ester reaches 71.5 percent. The preparation method has the advantages that the crystal structure of the main catalyst can be improved so as to be beneficial for carrying out the reaction; and the introduction of different auxiliary catalysts and quantities is helpful to improve the conversion ratio of the raw material and the product selectivity and is beneficial for improving the strength of the catalyst.

The invention discloses a cobalt-loaded covalent organic framework material as well as a preparation method and application thereof, and belongs to the technical field of catalyst preparation. The cobalt-loaded covalent organic framework material is prepared by taking a carbonized covalent organic framework as a matrix and cobalt nitrate hexahydrate as a cobalt source, reducing by using a sodium borohydride methanol solution, and introducing transition metal cobalt into the framework through room-temperature impregnation and thermal reduction processes. In the material, active components comprise Co0 and Co < 2 + > which are uniformly distributed on a carrier. Moreover, the metal cobalt is stably loaded in a carbon skeleton through the bonding effect of heteroatoms such as nitrogen and carbon, so that the stability, the catalytic activity and the durability of the metal cobalt are effectively improved, the dissolution risk of the metal cobalt is reduced, the hidden danger of environmental pollution is reduced, and efficient catalytic activity is shown in the aspect of catalyzing and activating peroxymonosulfate to degrade organic pollutants; and good recycling stability is achieved.

The invention provides a preparation method of macroporous high-hydrothermal-stability aluminum oxide and pseudo-boehmite, and the preparation method of the pseudo-boehmite comprises the following steps: step 1, adding an aluminum salt solution and an alkali solution into a rotating liquid membrane reactor at the same time, and nucleating at 20-30 DEG C to obtain nucleating slurry; wherein the rotating speed of the rotating liquid film reactor is 500 to 1200 rpm, and the stator-rotor gap of the rotating liquid film reactor is 0.1 to 0.3 mm; and step 2, transferring the nucleation slurry into a crystallization reaction device, crystallizing at 70-90 DEG C, and then carrying out solid-liquid separation and drying to obtain the pseudo-boehmite. The most probable pore size of the aluminum oxide prepared by the method is 6-12nm, the specific surface area is 150-600m < 2 > / g, and the aluminum oxide can still keep higher specific surface area after being subjected to hydrothermal treatment for 120 hours.

The invention discloses a high-entropy alloy / nitrogen-doped carbon nano catalytic material and a preparation method and application thereof.The nano catalytic material comprises a high-entropy alloy composed of five non-noble metals including Fe, Co, Ni, Cu and Mn and nitrogen-doped carbon synthesized with the assistance of MOF, the non-noble metal high-entropy alloy serves as a main body material, the nitrogen-doped carbon serves as a carrier material, and the nitrogen-doped carbon serves as a carrier material. A non-noble metal high-entropy alloy is loaded on nitrogen-doped carbon to construct a novel nano catalytic material, and the novel nano catalytic material is used for activating peroxydisulfate to remove antibiotics in a water body. The catalyst has the advantages of excellent chemical stability, good reusability and the like and is a novel nano catalytic material with efficient catalytic performance and environment-friendly characteristics, and the preparation method has the advantages of being simple in operation process, green, environmentally friendly, economical, feasible and the like and can be used for large-scale preparation.

The invention relates to a preparation method of Pt monatomic nano-enzyme and application of Pt monatomic nano-enzyme in cardiac troponin I. The preparation method comprises the following steps: 1) ultrasonically dispersing cobalt salt, selenium powder, chloroplatinic acid, urea and sodium chloride in an alcohol solvent, heating and stirring until the solvent is completely volatilized to obtain a solid mixture, and grinding the solid mixture into powder; and 2) placing the powder in a heating device, carrying out Joule heat treatment in an air atmosphere, washing a reactant, and carrying out vacuum drying to obtain the Pt monatomic nano-enzyme. Se doping is introduced in the one-step chemical reaction process to construct oxygen vacancies, rapid heating and structural shaping are achieved in combination with Joule heat treatment, the Se-doped Co3O4-loaded Pt monatomic catalyst is obtained, the oxygen vacancies and Se doping sites are synergistically used as anchoring sites, Pt monatomic atoms are effectively fixed, and the loading capacity and dispersity of the Pt monatomic atoms are improved. The obtained material shows excellent POD-like enzyme activity, can be used for constructing a high-sensitivity colorimetric immunoassay system, and realizes rapid and accurate detection of cTnI.

The invention provides a functional graded porous carbon microsphere and a preparation method and application thereof, the preparation method comprises the following steps: S1, mixing a soft template, a phenolic compound, a cross-linking agent and a basic catalyst, and reacting to obtain a thermosetting phenolic resin microsphere; s2, carrying out pre-carbonization treatment on the thermosetting phenolic resin microspheres to obtain a carbonized material; s3, performing physical activation on the carbonized material to obtain graded porous carbon microspheres; s4, performing heat treatment on the graded porous carbon microspheres to obtain functionalized graded porous carbon microspheres; the preparation method has the characteristics of simple process, environmental protection and economical efficiency, the functionalized porous carbon microspheres prepared by the method are uniform in morphology, and the pore volume, pore diameter and pore structure of the functionalized graded porous carbon microspheres can be accurately regulated and controlled, so that the functionalized graded porous carbon microspheres meeting application requirements are obtained.

The invention relates to the technical field of nano-enzymes, in particular to a Fe monatomic / Pt nano-cluster nano-enzyme as well as a preparation method and application thereof. The invention relates to a preparation method of Fe monatomic / Pt nanocluster nano-enzyme, which comprises the following steps: dispersing graphite phase carbon nitride in water, adding polyphenol and amine, stirring for 10-14 hours, carrying out suction filtration, and drying to obtain a polyphenol amine coated graphite phase carbon nitride precursor; dispersing the graphite-phase carbon nitride precursor in water, adding an iron source and a platinum source, stirring for 10-14 hours, and performing suction filtration, drying, carbonization, acid pickling, centrifugation and drying to obtain the Fe monatomic / Pt nanocluster nanoenzyme. The Fe monatomic / Pt nanocluster nano-enzyme is prepared by the method disclosed by the invention. The invention relates to an application of a Fe monatomic / Pt nanocluster nano-enzyme in pesticide detection. Compared with a single Fe monatomic or Pt nanocluster nano-enzyme, the Fe monatomic / Pt nanocluster nano-enzyme provided by the invention can generate a synergistic effect and has higher catalytic activity.

The invention discloses a preparation method and application of a Fe2O3-Bi4TaO8Br photo-Fenton catalyst, and belongs to the technical field of advanced oxidation treatment. The specific preparation method comprises the following steps: preparing a Bi4TaO8Br nanosheet by virtue of a molten salt method, and then loading Fe2O3 on the Bi4TaO8Br nanosheet by virtue of a hydrothermal method, so as to obtain the Fe2O3-Bi4TaO8Br photo-Fenton catalyst. The prepared Fe2O3-Bi4TaO8Br photo-Fenton catalyst shows efficient photo-Fenton degradation performance on tetracycline (TC) under the visible light condition, meanwhile, the preparation process is safe, simple, convenient and efficient, and potential environment purification application prospects are achieved.

The invention discloses a method for preparing a carbon monoxide oxidation catalyst by using a waste vanadium-titanium catalyst and electroplating sludge, which realizes the mutual reaction of metal components in the electroplating sludge and components in the waste vanadium-titanium catalyst through the synergistic effect of various physical and chemical treatment methods and additives in the whole preparation process. The complex multi-metal catalyst can be used for photo-catalytic oxidation of carbon monoxide, has a remarkable oxidation effect and has a good application prospect.

The invention relates to the technical field of biodiesel hydrogenation catalysts, and particularly discloses a hydrogenation catalyst of organic bentonite loaded cerium-zirconium solid solution and nickel-molybdenum phosphide as well as a preparation method and application of the hydrogenation catalyst. The hydrogenation catalyst with the organic bentonite loaded with the cerium-zirconium solid solution and the nickel-molybdenum phosphide comprises an organic bentonite carrier, the cerium-zirconium solid solution and the nickel-molybdenum phosphide, the loading capacity of the cerium-zirconium solid solution on the organic bentonite carrier is 2-2.5 wt%; the cerium-zirconium solid solution comprises cerium dioxide and zirconium dioxide; the loading capacity of the nickel molybdenum phosphide on the organic bentonite carrier is 10-15 wt%; and the nickel molybdenum phosphide is Ni2Mo3P. The organobentonite carrier provides an acid site and promotes deoxidation path optimization, the layered structure of the organobentonite carrier can limit the cerium-zirconium solid solution and the nickel-molybdenum phosphide, and organic groups are also embedded into the layered structure, so that the organic compatibility of the organobentonite carrier to biodiesel is improved, and the catalytic efficiency is improved. The cerium-zirconium solid solution provides oxygen vacancies, promotes hydrogenation / deoxidation, and improves the thermal stability and sintering resistance of the catalyst.

The invention discloses a self-driven bio-electro-Fenton sewage treatment method based on granular sludge electroactivity domestication. The sewage treatment method comprises the following steps: firstly, inoculating anaerobic granular sludge into an anode chamber of a microbial fuel cell, fixing a clustered carbon fiber electrode in a biological anode chamber as an electrode collector, taking a cathode as an oxygen reduction cathode, and performing electrochemical enrichment to obtain electroactive granular sludge; then, preparing an iron-cobalt diatomic catalyst from the nitrogen-doped graphene oxide, cobalt phthalocyanine and iron phthalocyanine; and finally, adding the iron-cobalt diatomic catalyst into the electroactive granular sludge to form a hybrid structure, controlling dissolved oxygen in a reaction system, and degrading organic pollutants by adopting an SBR (sequencing batch reactor). The biological electro-Fenton technology has a better effect of removing refractory organic pollutants, and compared with a traditional electro-Fenton method, the self-Fenton technology can achieve the activity of molecular oxygen without external electric energy input.

Methods for preparing a salt of urolithin A and, in turn, urolithin A. Combining in an alkaline aqueous solution a copper-containing catalyst, 2-bromo-5-hydroxybenzoic acid, and resorcinol produces a salt of urolithin A. Urolithin A has been prepared by protonating a salt of the compound.

The invention discloses a method for preparing a waste gas purification catalyst from red mud and electrolytic manganese residues, a product and application thereof, and belongs to the field of solid waste resource utilization. According to the method, the preparation process is simple, efficient resource utilization of the red mud and the electrolytic manganese residues can be achieved through reasonable burdening, hydrothermal reaction and pyrolysis carbonization processes, and no other waste liquid or secondary solid waste is generated in the preparation process. The prepared waste gas purification catalyst is excellent in catalytic performance and can be used for quickly converting harmful gas of 1, 2-dichlorobenzene.

The invention discloses a method for preparing a catalyst by using red mud and titanium dioxide acidolysis waste residues as well as a product and application thereof. The method comprises the following steps: calcining red mud, adding titanium dioxide acidolysis waste residues and an auxiliary agent, uniformly stirring, adding a desulfurization waste liquid, uniformly stirring, carrying out a hydrothermal reaction, carrying out solid-liquid separation, and calcining to obtain the catalyst material. The preparation process is simple, and efficient resource utilization of the red mud and the titanium dioxide acidolysis waste residues can be achieved. The catalyst prepared through a hydrothermal reaction and a secondary calcination process realizes efficient removal of COD, ammonia nitrogen, total phosphorus and heavy metal pollutants in waste liquid through a photocatalytic function.

The present invention relates to a process and a system for the production of hydrogen and carbon by catalytic non-oxidative decomposition of hydrocarbons, such as saturated C1+ hydrocarbons, such as methane, in the presence of a fresh or a spent catalyst composition comprising at least one carbon catalyst. The process of the invention is characterised in that the fresh or spent catalyst composition is heated by means of induction heating to a temperature comprised between 500° C. and 1100° C. The catalyst compositions as applied in accordance with the invention comprise, and preferably consist of, (I) a first component, wherein said first component is selected from one or more non-porous carbon catalysts and / or one or more porous carbon catalysts; and (II) optionally, a second component, wherein said second component consists of a non-carbon material, and preferably is a ceramic or zeolitic support material. Further provided are a spent catalyst obtained when carrying out a process of the invention, and uses thereof.

The invention discloses a method for preparing a composite catalyst by synergistically utilizing red mud and arsenic alkali residues as well as a product and application thereof, and belongs to the field of resource utilization of industrial wastes. The method disclosed by the invention is simple in preparation process, wide in preparation raw material source and capable of realizing full-amount utilization of the red mud and the arsenic alkali residues. Compared with a traditional titanium dioxide and iron arsenate catalyst, the composite catalyst prepared by the method is more excellent in performance, the landfill leachate treatment efficiency can be remarkably improved, and the catalytic removal effect of 2145 mg / g COD, 162 mg / g total phosphorus, 356 mg / g ammonia nitrogen and 122 mg / g mercury can be achieved at most.

The invention belongs to the technical field of pollutant detection, and relates to an iron-based nano enzyme and application thereof in quinolone antibiotic detection. The preparation method comprises the following steps: adding ferric trichloride hexahydrate and cerium nitrate hexahydrate into water, uniformly mixing to obtain a mixed solution A, uniformly mixing the mixed solution A with an organic polyacid ligand solution, and then carrying out a reflux reaction to prepare a Ce / Fe-MOF precursor; and adding the Ce / Fe-MOF precursor and sodium hypophosphite into a tubular furnace, and calcining in a nitrogen atmosphere to prepare Ce / Fe-P. According to the present invention, the synthesized material has the nanometer prism mesoporous structure, the contact area with the substrate is effectively increased, the visual detection of the NOR can be achieved based on the principles of low-concentration NOR activity improving and high-concentration Ce / Fe-P activity inhibition, and the high sensitivity, the low detection limit, the wide linear response range and the good selectivity and the good stability are provided.

The invention belongs to the technical field of sewage treatment, and discloses a biodegradable-photocatalytic composite material as well as a preparation method and application thereof. The preparation method comprises the following steps: mixing a photocatalyst, sodium alginate and water to obtain gel containing the photocatalyst, then adding a photosynthetic bacteria concentrated solution, then adsorbing photosynthetic bacteria and the photocatalyst by using a carrier, and finally immobilizing in a calcium chloride solution to obtain the composite material. Photosynthetic bacteria are selected as microorganisms, and the method has the advantages of being flexible in metabolism mode, high in antibiotic tolerance, high in breeding speed, free of sludge treatment and the like. The photocatalyst and the photosynthetic bacteria are loaded on the polyurethane sponge, so that the photosynthetic bacteria are easily separated from water while being protected. The photocatalyst outside the carrier generates high-activity substances, and refractory antibiotics are converted into biodegradable intermediates. And a generated intermediate product is decomposed by microorganisms in the carrier, so that efficient degradation and mineralization of antibiotics in the sewage are realized.

The application discloses an organic sulfur hydrolysis catalyst, a preparation method and application, and adds a water-soluble titanium-containing compound and a surfactant to obtain titanium-containing pseudo-boehmite; finally, the titanium-containing pseudo-boehmite is formed to obtain the organic sulfur hydrolysis catalyst; and in the carbonization method reaction process, the pH is slowly changed by adjusting the flow of the CO2, the pH change value of the mixed solution is less than 1 in 30 min, and the final pH value of the reaction solution is controlled to be 7.0-9.5. In the preparation of the pseudo-boehmite, the titanium element is highly dispersed in the pseudo-boehmite powder by adding the titanium element and the surfactant and controlling the pH change rate, the catalyst fully plays the hydrolysis effect of each titanium active site on the organic sulfur, and a higher organic sulfur hydrolysis rate is realized under the condition that the titanium content is lower.

Provided are methods of preparing cannabinoids and cannabinoid derivatives and compositions containing the cannabinoids and derivatives.

The invention belongs to the technical field of petroleum processing, and particularly relates to a catalyst and a preparation method and application thereof. The raw materials of the catalyst comprise a metal active component, a carrier and an auxiliary agent, the metal active component is sulfides of Mo and Ni elements, the carrier is spherical gamma-Al2O3 of 0.5-1 mm, and the auxiliary agent is P; the carrier is modified by using the metal active component and the auxiliary agent to serve as the catalyst. The high-activity catalyst is synthesized by adopting the strategy of changing the roasting temperature, adding the additive for doping modification and changing the molar ratio of metal active components, the additive is combined with surface aluminum atoms, the framework strength is enhanced, pore channel collapse caused by acid / water erosion is reduced, the water resistance and acid resistance of the catalyst are improved, and the catalytic reaction activity is further improved. The catalyst disclosed by the invention is accurate and controllable in structure, can be synthesized in batches, and can be applied to the co-catalytic hydrogenation process of biomass pyrolytic oil and / or a model compound thereof and petroleum distillate oil and / or VR.

The purpose of the present invention is to provide a curing catalyst that is highly stable and has a practical curing speed. The present invention provides a curing catalyst [B] used for curing a polymer [A] that has a reactive hydrolyzable silicon-containing group. The curing catalyst [B] contains the reaction products of a metal alkoxide [B1] and an ammonium hydroxide [B2]. The metal alkoxide [B1] includes one or both of a titanium compound [B1a] that is represented by chemical formula (1), and another metal alkoxide [B1b]. The other metal alkoxide [B1b] is an alkoxide of a metal other than titanium, and the ammonium hydroxide [B2] is represented by chemical formula (2).

The invention discloses a carbon nitride-based composite material as well as a preparation method and application thereof. The carbon nitride-based composite material comprises a non-metal doped carbon nitride carrier and a noble metal, wherein the noble metal exists in the carrier in an element doping form and / or is loaded on the carrier in an oxide form; the precious metal is one or more of Pt, Pd, Au and Ru, and the nonmetal is one or more of P, S and I. According to the carbon nitride composite material disclosed by the invention, noble metal is utilized to modify carbon nitride, the number of surface active sites is increased, the electron and chemical structures of an active center are adjusted, and meanwhile, generation and migration of photo-generated charges are promoted. Meanwhile, the surface of the carbon nitride composite material is modified by non-metallic elements, so that adsorption and activation of reactant H2O molecules are effectively promoted. The catalyst disclosed by the invention is simple in preparation process, good in repeatability and easy for large-scale production.

The present invention provides a method for preparing large-pore spherical alumina, and relates to the technical field of spherical alumina. The preparation method of the present invention comprises the following steps: mixing pseudo-boehmite powder with water to obtain a suspension, adding a peptizing agent for peptization to prepare an aluminum hydroxide sol; adding cross-linking molecules to the aluminum hydroxide sol to form a system to be cross-linked; adding a cross-linking agent to the system to be cross-linked to obtain a sol containing a prepolymer; and subjecting the sol to oil-ammonia column molding, drying and roasting to obtain large-pore spherical alumina. The present invention adopts an oil-ammonia column molding method, which does not require the addition of a pore-expanding agent or new equipment, and the preparation process is simple and does not introduce new impurities, so it is suitable for industrial production. The large-pore spherical alumina prepared by the present invention has a pore volume of up to 0.60cm 3 / g or more, and can be used as a propane dehydrogenation catalyst carrier.

The invention provides a wastewater advanced oxidation catalyst and a preparation method and application thereof, the wastewater advanced oxidation catalyst is of a core-shell structure, the core is activated carbon containing copper oxide and optional ferrous sulfide, and the shell is a silicon oxide-aluminum oxide compound containing nano ferrous sulfide. The invention further provides a preparation method of the wastewater advanced oxidation catalyst and application of the wastewater advanced oxidation catalyst in organic wastewater treatment. The wastewater advanced oxidation catalyst has the characteristics of high catalytic degradation capability on organic pollutants and the like, solves the problem of copper dissolution, and improves the long-term effectiveness of the catalyst.

To provide a method and a device for producing a hydrocarbon that use microbubbles capable of more efficiently reducing carbon dioxide to synthesize the hydrocarbon. Provided is a method for producing a hydrocarbon by dissolving carbon dioxide as microbubbles and dissolving a gas that generates active oxygen as microbubbles in water, generating active oxygen by irradiating the water containing microbubbles of the gas that generates active oxygen with ultraviolet rays in the presence of a photocatalyst, and bringing the microbubbles of the carbon dioxide into contact in the presence of the active oxygen to reduce the carbon dioxide. The microbubbles of the gas that generates active oxygen are dissolved in the water at 10 to the power of 8 / mL or more, the microbubbles of carbon dioxide are dissolved in the water at 10 to the power of 8 / mL or more, and the gas that generates active oxygen contains ozone.

The invention discloses a double-atom catalyst screening method, an iron / vanadium double-atom catalyst, and a preparation method and application of the iron / vanadium double-atom catalyst. The screening method comprises the following steps: S1, taking adsorption energy and electron transfer amount as descriptors for evaluating the PMS adsorption and activation capability of a catalyst, carrying out first-step screening on M-MXene loaded with monatomic metals according to a sequence of adsorption energy from high to low, obtaining M-MXene which is ranked as top n, and screening to obtain n metals M; step S2, pairing n kinds of metals M in pairs to obtain a diatomic pairing carrier M1-M2-MXene group; and S3, carrying out differential charge calculation, and screening out the M1-M2-MXene with the highest electron transfer amount as the diatomic catalyst. The iron / vanadium diatomic catalyst with the MXene as the substrate prepared by screening can activate PMS, has high and stable removal rate and removal efficiency for bisphenol A, can completely remove 20 mg / L of BPA within 6 min, and has a maximum reaction rate constant of 0.98 min <-1 >. The method is simple in screening step, easy to control, high in practicability and suitable for efficient screening of the diatomic catalyst.

According to the present invention, there is provided a monatomic catalyst, the monatomic catalyst comprising: a nitrogen-doped carbon structure; and a monatomic metal wherein the monatomic metal forms a coordinate bond with a nitrogen atom of the nitrogen-doped carbon structure. When an electrochemical cell having an electrode pair containing the monatomic catalyst is used in an electrochemical advanced oxidation process for water treatment, organic pollutants in wastewater can be effectively decomposed under mild pH conditions.

The invention belongs to the technical field of catalyst carriers, and particularly relates to a preparation method of a super-macroporous residual oil hydrodemetallization tooth spherical alumina carrier. Aluminum hydroxide and deionized water are mixed and peptized, a modifier is added to regulate and control the pore structure of the aluminum hydroxide, a pore-enlarging agent and a sintering aid are added into a muddy material, and uniformly-distributed pore structures can be formed in an alumina carrier under the action of the pore-enlarging agent and the sintering agent in the roasting process, so that the pore-enlarging effect of the alumina carrier is improved; and the pore structure is further expanded through roasting, so that the pore volume and the macropore ratio in the alumina carrier are improved. In addition, hydroxyl groups on the surface of the alumina carrier are subjected to condensation reaction in the roasting process, so that the acidity of the carrier is effectively reduced, and the corresponding catalytic performance is improved.

The invention relates to a Bi4TaO8Cl (at) g-C3N4 composite nanomaterial as well as a preparation method and application thereof, and the preparation method comprises the following steps: respectively carrying out calcination pretreatment on BiOCl, Bi2O3 and Ta2O5, uniformly mixing the BiOCl, Bi2O3 and Ta2O5 subjected to calcination pretreatment, adding a molten salt aid, uniformly mixing, calcining, and washing the calcined product to obtain a Bi4TaO8Cl nanosheet; the preparation method comprises the following steps: dispersing g-C3N4 and a Bi4TaO8Cl nanosheet in water, and carrying out ultrasonic compounding, so as to obtain the Bi4TaO8Cl-coated g-C3N4 composite nano material. When the material is subjected to mechanical vibration to generate piezoelectric potential, electrons and holes can be effectively separated under the action of an electric field and migrate in different directions, so that the recombination rate of the electrons and the holes is remarkably reduced, more carriers participate in the reaction of catalyzing to generate H2O2, and the catalytic efficiency is greatly improved.