9320 results about "Catalysis" patented technology

The invention relates to a catalysis and micro-electrolysis combined technology for high-concentration refractory organic wastewater; the organic wastewater is collected to an adjusting tank and enters an air floatation tank for air floatation treatment to remove part of the organic matters after the adjustment of water volume and water quality; the scruff is collected or recovered; the wastewatergoes through Ph adjustment and then enters a catalytic iron-carbon and micro-electrolysis unit to improve the biochemical quality; the effluent goes through Ph adjustment and then enters a sedimentation tank; the effluent of the sedimentation tank adopts anoxic-aerobic biochemistry treatment to remove the organic matters and ammonia nitrogen and then is emitted after reaching the standard; and the filler of the catalytic iron-carbon and micro-electrolysis unit comprises iron, carbon and a catalyst, wherein the mass ratio of the iron, carbon and catalyst is 1: (0.3-1.5): (0.01-0.5). The invention can effectively improve the micro-electrolysis electrochemical reaction efficiency and the degrading capability to the organic matters, and reduce the wastewater treatment cost with convenient technological operation.

The invention discloses a reactor for catalytically oxidizing wastewater through ozone and an application method thereof. The reactor comprises a reaction chamber, a water inlet, a water outlet, a gasoutlet and a circulating water outlet, wherein a separation plate in the reaction chamber is used for separating the lower part of the reaction chamber into a jet flow reaction chamber and a tower type reaction chamber; the jet flow reaction chamber is internally provided with a first catalysis bed layer and an ejector; the circulating water outlet is connected with a working fluid inlet of the ejector; the gas outlet is connected with a sucked liquid inlet of the ejector through a gas circulating pipe; the water inlet is arranged at the bottom of the jet flow reaction chamber; the tower typereaction chamber is internally provided with a tower plate and a second catalysis bed layer; the water outlet is arranged at the bottom of the tower type reaction chamber; a gas inlet is communicatedwith the lower side of the tower plate and the gas circulating pipe; the gas circulating pipe is connected with a tail gas outlet. The reactor has the advantages of high mass transfer efficiency, rapid reaction speed, high ozone utilization rate, high COD (Chemical Oxygen Demand) removal rate and the like.

The invention relates to a graphene-based novel material and a chemical vapor deposition preparation technology thereof, in particular to graphene foam with a three dimensional fully connected network and a macroscopic quantity preparation method thereof. The method is suitable for a mass preparation of the graphene foam with high qualities. Three dimensional connected graphene can grow by catalytic cracking of carbon source gases on the surface of a three dimensional porous metal through the chemical vapor deposition technology, and a porous foam-shaped graphene three dimensional macroscopic body can be obtained after a porous metal base is removed by dissolving subsequently. According to the graphene foam with the three dimensional fully connected network and the macroscopic quantity preparation method thereof, a simple template replication method is used for preparing the three dimensional connected graphene macroscopic body, and the method has the advantages that the operation is simple and convenient, the rate of production is high, and the adjustment and control of the structure are easy. The graphene foam forms the fully connected network in a seamless connection mode, has a low density, a high porosity and specific surface area and excellent capabilities of charge conduction and heat conduction and establishes a foundation for applications of graphene in fields of electric conduction, thermally conductive composite materials, electromagnetic shielding, wave absorbing, catalysis, sensing and energy storage materials and the like.

A field emission device having bundles of aligned parallel carbon nanotubes on a substrate. The carbon nanotubes are oriented perpendicular to the substrate. The carbon nanotube bundles may be up to 300 microns tall, for example. The bundles of carbon nanotubes extend only from regions of the substrate patterned with a catalyst material. Preferably, the catalyst material is iron oxide. The substrate is preferably porous silicon, as this produces the highest quality, most well-aligned nanotubes. Smooth, nonporous silicon or quartz can also be used as the substrate. The method of the invention starts with forming a porous layer on a silicon substrate by electrochemical etching. Then, a thin layer of iron is deposited on the porous layer in patterned regions. The iron is then oxidized into iron oxide, and then the substrate is exposed to ethylene gas at elevated temperature. The iron oxide catalyzes the formation of bundles of aligned parallel carbon nanotubes which grow perpendicular to the substrate surface. The height of the nanotube bundles above the substrate is determined by the duration of the catalysis step. The nanotube bundles only grow from the patterned regions.

Provided is a method for the synthesis of N-protected bis-3,6-[4-aminobutyl]-2,5-diketopiperazine including the step of heating a solution of c-amino protected lysine in the presence of a catalyst selected from the group consisting of sulfuric acid, phosphoric acid, and phosphorus pentoxide.

Embodiments of the present invention are generally directed to materials processing methods using femtosecond duration laser pulses, and to the altered materials obtained by such methods. The resulting nanostructured (with or without macro- and micro-structuring) materials have a variety of applications, including, for example, aesthetic applications for jewelry or ornamentation; biomedical applications related to biocompatibility; catalysis applications; and modification of, for example, the optical and hydrophilic properties of materials including selective coloring.

Disclosed is a polypropylene composition useful for making solid state oriented film. The composition comprises two predominantly isotactic polypropylenes with the melting point temperature of one of the polypropylenes being substantially lower than the melting point temperature of the other. In one embodiment of the composition the higher melting point polypropylene is made by Ziegler-Natta catalysis, while the lower melting point polypropylene is made by metallocene catalysis. Compared to polypropylene with similar melt flow rate and made by Ziegler-Natta catalysis, and solid state oriented film thereof, the composition provides a better balance of elevated temperature draw characteristics and physical properties of oriented film made therefrom. Thus, at the same or lower elevated temperature yield stress, oriented film of the composition exhibits improved properties such as stiffness, elongation-at-break, dimensional stability, and oxygen barrier. Also disclosed is a method for the manufacture of oriented, flexible packaging film. In the method a cast sheet is melt extruded from the composition, and, after cooling until it is solid, the cast sheet is stretched to the desired extent of orientation at a temperature which the sheet does not break while being stretched, but below the Tm of the composition. The resulting film then is cooled to at least the crystallization temperature of the lower melting point polypropylene.

The invention discloses a preparation method of a novel three-dimensional nitrogen doped graphene composite material system. The method comprises the following steps: 1, uniformly dispersing graphene oxide in a solvent at room temperature, adding a selected material and a nitrogen-containing compound, and uniformly mixing to form a mixed solution; 2, reacting the mixed solution at a temperature from room temperature to 150DEG C for 0-8h; and 3, cooling the above obtained product to room temperature, centrifuging, collecting the obtained product, washing, and drying to obtain the nitrogen doped graphene composite material. The three-dimensional nitrogen doped graphene composite material system with the nitrogen content of 8-19% can be efficiently and controllably prepared through the method, and the nitrogen content of the system can be controlled by changing the kind and the amount of the added nitrogen-containing compound, the reaction temperature and the reaction time; and the method is simple, is easy to enforce, allows the yield to be greater than 98.9%, and can be widely used in fields of water treatment, biomedicines, energy generation, conversion and storage devices, electrostatic prevention, heat management, heat conduction and dissipation, sensors, electromagnetic shielding, wave absorption and catalysis.

The invention relates to the preparation of an inorganic functional material, in particular to a photochemical catalyst prepared by taking a porous mineral as a carrier for carrying an n-typed semiconductor with a large energy gap and a method thereof. The natural porous mineral and an artificial porous mineral are used for preparing the carrier to carry the n-typed semiconductor and a compound semiconductor with photochemical catalysis function; the catalyst prepared is applied to the degradation of organic pollutants by photochemical catalysis or to serving as the filling of paints which can reproduce after being poisoned. The carrier prepared by the invention has large specific surface area, strong adsorption capacity, good adhesive force and low environment cost, can remarkably improve the efficiency of the photochemical catalyst and lower the poisoning risk of the catalyst; the sol of the semiconductor or the compound semiconductor has a photoresponse range covering visible light area and ultraviolet light area, thus being capable of effectively utilizing the light energy and being beneficial to reduce the cost of the light sources; the sol-gel dipping method is adopted to realize loading, which has the advantages of mild condition, even distribution, simple technique and convenience for mass production.

Metal oxide coated substrates are disclosed comprising a three dimensional substrate having a coating of metal oxide on at least a portion of all three dimensions thereof and having a polymeric inner core, produced by a unique process having particular applicability to the manufacture of tin oxide coated three dimensional substrates. Certain novel coated substrates, such as flakes, spheres and porous substrates are disclosed. The coated substrates are useful in polymers, catalysis, heating and shielding applications.

The invention relates to a flexible conductive thin film compositing a two-dimensional graphene and a one-dimensional nanowire and a preparation method of the flexible conductive thin film. The preparation method includes the following steps: dispersing the graphene, the nanowire and dispersion auxiliary in solvent, obtaining graphene / nanowire solvent which is well dispersed after the solvent is processed through ultrasound concussion, and obtaining a graphene / nanowire composite thin film after the graphene / nanowire solvent is processed through vacuum filtration and drying. The thickness of the composite thin film is 10 nanometers to 1000 micrometers, the composite thin film has good strength and flexibility, square resistance is between 0.001 ohm per square and 3000 ohms per square, and electrical conductivity is between 0.01 siemens per centimeter to 5000 siemens per centimeter. The graphene / nanowire composite thin film which is obtained with the adoption of the preparation method has good strength, flexibility, and electrical conductivity, and is controllable in thickness, cuttable in shape, simple in preparing process, easy to operate, low in manufacturing cost, and suitable for solar batteries, energy storage, heat dissipation, catalysis, sensing, and conductive composite material fields.

The invention discloses a preparation method for preparing manganese dioxides in various crystal forms, comprising the following steps of: with divalent manganese salt as a reducing agent and potassium permanganate as an oxidant, adjusting the ratio of raw materials, and reacting in a reaction kettle at 160 DEG C for 1-12h to synthesize both one-dimensional alpha-MnO2 nano fibers and beta-MnO2 nano bars and gamma-MnO2 flower-like structures. The preparation method is simple in preparation process and low in cost; and the product can be used for the research in fields such as super capacitor direction, catalysis and the like.

A skin dressing, particularly a wound dressing, comprises oxidoreductase enzyme and, optionally, peroxidase enzyme, wherein the enzyme(s) are present in hydrated condition, e.g. being present in one or more hydrated hydrogels. The dressing is used by being located on the skin of a human or animal e.g. over a wound. The oxidoreductase enzyme catalyses a reaction that produces hydrogen peroxide from an appropriate substrate, the substrate either being naturally present in body fluids and / or being supplied separately and / or being incorporated into the dressing. The currently preferred oxidoreductase enzyme is glucose oxidase. The catalyses reaction of β-D-glucose substrate to give hydrogen peroxide and gluconic acid. A mixture of oxidoreductase enzyme can undergo reaction (optionally catalysed by the peroxidase enzyme) to produce a variety of species including reactive oxygen intermediates that have antimicrobial properties and that can therefore assist in promoting wound healing.

The invention describes a procedure to make metal containing composite particles and composite particle suspensions. The procedure is versatile and can produce particles with a variety of particle sizes and compositions. For some applications the metal composite particles can provide the functionality of wholly metallic particles including configurations where the metal is located on the particle surface. Such metals have application in a wide variety of fields, including accomplishing electrochemical reduction and catalysis.

The invention belongs to the field of environmental protection and environmental catalysis, and in particular relates to a novel composite carrier SCR flue gas denitration catalyst. An SCR flue gas denitration catalyst which takes TiO2-mesoporous SiO2 as a compound carrier is obtained by preparing the TiO2-mesoporous SiO2 by hydrolyzing tetrabutyl titanate in mesoporous SiO2 by adopting a sol-gel method, taking the TiO2-mesoporous SiO2 as the compound carrier of the SCR catalyst, supporting a cocatalyst on the TiO2-mesoporous SiO2 compound carrier, and finishing the supporting of a main catalyst. The catalyst comprises the following components in percentage by mass: 85 to 99.9 percent of the compound carrier, 0 to 5 percent of the cocatalyst and 0.1 t0 10 percent of the main catalyst, wherein the compound carrier consists 80 to 95 weight percent of the mesoporous SiO2 and 5 to 20 weight percent of the TiO2. The introduction of the mesoporous SiO2 greatly increases the specific area of the catalyst; and the catalyst has high dispersibility of active substance and high stability, contributes to a gas to enter pores to fully react with the catalyst because the carrier has regular pore structures, and has high denitration performance.

The invention belongs to the field of photocatalytic materials, in particular relates to a novel red light or infrared light catalytic material which comprises an up-conversion material and a semiconductor material. In the invention, a semiconductor photocatalytic material and a red light / infrared-ultraviolet up-conversion luminescent material are combined, and the up-conversion material is used for absorbing red light / infrared light and emitting ultraviolet light, thereby activating the semiconductor photocatalytic material and realizing the infrared light catalysis. By modifying and improving the semiconductor in the composite material, the photocatalytic activity of the material can be further improved. The invention expands the wavelength range of the excitationlight required by photocatalytic reaction, breaks the limit that the photocatalytic reaction can be activated only by ultraviolet light and shortwave visible light, improves the utilization ratio of sun light in the photocatalytic reaction, and can be widely applied to the photocatalytic degradation of organic pollutants in water by using red light, infrared light and sun light.

The invention relates to a kieselguhr-based porous ceramics, a preparation method thereof and a method for loading Ag doped with nano TiO2 on the same, belonging to the technical field of a kieselguhr inorganic material. The kieselguhr-based porous ceramics is made from kieselguhr, a sintering auxiliary agent, a dispersing agent, a binder and water in the weight ratio of 60-92:8-40:0.01-2:0:001-1:100-450. The kieselguhr-based porous ceramics has functions of absorption and filtration, and can absorb granules in fluid when the fluid passes through the lieselguhr-based porous ceramics. Ag doped with nano TiO2 is loaded on the kieselguhr-based porous ceramics to generate kieselguhr-based porous ceramics loading the Ag doped with TiO2. The laden anatase-type nano TiO2 has large specific surface area. The effects of filtration, photochemical catalysis and sterilization of the kieselguhr-based porous ceramics loading the Ag doped with nano TiO2 are greatly increased.

The invention discloses a magnetic composite nano microsphere capable of emitting fluorescent light and a preparation method thereof, which belong to the inorganic nanophase material field. The preparation method comprises the following steps: firstly, the sol-gel method or the reversed phase microemulsion method is adopted for performing base catalysis on alkyl silicate, and a layer of silicon dioxide is uniformly coated on the surface of inorganic magnetic nano particles; secondly, an amino silane coupling agent is adopted for performing surface finish on silicone dioxide; thirdly, semiconductor quantum dots are absorbed on the surface of the silicone dioxide through the electrostatic action between an amino group and a carboxyl group on the surface of the amino silane coupling agent; and fourthly, the magnetic composite nano microsphere with a core-shell structure capable of emitting the fluorescent light is obtained. The preparation method has easy obtained raw materials and low cost. The composite nano microsphere obtained has good stability, controllable grain size, narrow distribution, and has good magnetic responsivity and performance of being capable of emitting the fluorescent light, and the two performances are controllable. The magnetic composite nano microsphere and the preparation method can be applied in the fields of biomedicine, bioengineering, etc. including immunoassay, biological labeling and separation, cell imaging and so on.

The present invention provides for a method and apparatus for purifying carbon dioxide. Sulfur species and other impurities are removed from the carbon dioxide by a series of steps which include heater means, impurity adsorption means and catalysis means. Economical on-site analytical capabilities are also provided for by concentrating the impurities prior to their analysis.

An artificial honeycomb structure, and simple constructions therefrom, are provided, wherein at least a portion of at least one of the enclosing honeycomb cell walls is substantially porous, open, or permeable, and wherein at least one of the hollow cells comprises at least one substantially nonporous enclosing wall. The honeycomb and its constructions can be useful in applications that include, but are not limited to, heat exchange and storage, structural support, impact absorption, filtration, acoustic dampening, catalysis, and flow control and distribution.

The invention relates to permeable bricks inlaid with nanometer titanium dioxide and a preparation method thereof and belongs to the field of building materials. According to the preparation method provided by the invention, titanium dioxide precursor turbid liquid is evenly sprayed into holes of permeable brick base bodies, and then the permeable brick base bodies are dried and calcined for 10-30 min so as to obtain the permeable bricks inlaid with nanometer titanium dioxide and anatase type nanometer titanium dioxide is uniformly inlaid in the holes of the obtained permeable bricks. The permeable bricks can effectively degrade contaminants in water seepage passing though the permeable bricks and some organic contaminants attached to the surfaces of brick bodies in a manner of photochemical catalysis and also can degrade a part of gaseous pollutants in air in a manner of photochemical catalysis.

The present invention relates to a polyether carbonate polyol made by copolymerizing a starter molecule with carbon dioxide, at a pressure ranging from about 10 psia to about 2,000 psia, and an alkylene oxide, at a temperature ranging from about 50° C. to about 190° C. and in the presence of from about 0.001 wt. % to about 0.2 wt. % of a substantially non-crystalline double metal cyanide (DMC) catalyst, wherein the polyol has an incorporated carbon dioxide content of from about 1 wt. % to about 40 wt. %, wherein the ratio of cyclic carbonate by-product to total carbonate is less than about 0.3 and wherein the weight percentages are based on the weight of the polyol. The inventive polyether carbonate polyols may find use in producing polyurethane foams, elastomers, coatings, sealants and adhesives with improved properties.

The invention discloses a method for rapidly synthesizing a BTC (1,3,5-benzenetricarboxylic acid)-based nanoscale organometallic framework material at room temperature. The nanomaterial is prepared by the following steps: mixing metal acetate aqueous solution with BTC solution at room temperature, and reacting to obtain BTC-based organometallic framework nanoparticles. The method is rapid, simple and energy-saving; the yield is high; the used raw materials and solvents are inexpensive and easily available; the safety problem of commonly used nitrate is not caused; the method is favorable to the industrial production and has wide application prospects in the fields of catalysis, adsorption, drug carriers, building of nano devices and the like.

The invention discloses a simple method of using foam nickel as a substrate to prepare a three-dimensional graphene-carbon nitrogen nanotube composite. Effective composite of three-dimensional graphene and carbon nanotubes is realized by directly growing the carbon nanotubes on the surface of the three-dimensional graphene by means of the two-step chemical vapor deposition technique, and functionalization of a carbon-based three-dimensional structure is realized by introducing nitrogen-doped atoms into the carbon nanotubes. Compared with other methods for preparing the three-dimensional graphene-carbon nitrogen nanotube composite, the method has the advantages of simplicity in preparation process, low cost, high product conductivity, large specific surface area and the like. The three-dimensional graphene-carbon nitrogen nanotube composite obtained by the method has excellent performances in terms of catalysis oxygen reduction reaction, electrochemical capacitors, electrochemical biological sensing, super-hydrophobic oleophylic foams and the like, and has high potential application values in terms of ionic cells, drug transmission, microreactors and the like.

Articles of manufacture and devices and methods of forming and using the same are provided, wherein the article comprises a porous inorganic substrate contained in or bounded by a support made from an inorganic material are provided, wherein said porous substrate and support are heated to a temperature effective to shrink the support onto the porous substrate such that liquid tight contact is formed between the porous substrate and the support. In a preferred aspect, the porous inorganic substrate has a porosity of at least 5%, and is a porous monolith formed using a sol-gel method. The articles thus formed provide a confined fluid flow through the porous substrate, providing superior performance in separations, catalysis, filtration, and the like.

The invention relates to a method for processing a high-temperature alloy furnace tube, which comprises the following steps: controlling the pressure of low-oxygen partial pressure gas to 0-3 atmospheric pressure; introducing the low-oxygen partial pressure gas into an atmosphere furnace provided with the high-temperature alloy furnace tube after passing through ammonia water; raising the temperature to between 600 and 1,100 DEG C; keeping the temperature for 5 to 80 hours; and forming an oxidized protective layer on the surface of the high-temperature alloy furnace tube to obtain the processed high-temperature alloy furnace tube. The method for processing the high-temperature alloy furnace tube is adopted to process a furnace tube of a hydrocarbon cracking furnace and the like, so that the compact and stable oxidized protective layer on the surface of the furnace tube, and the requirement for long-term use can be met; and the method can inhibit or retard the phenomena of catalysis and coking, reduces the carburization degree of the furnace tube, and prolongs the decoking cycle and the service life of the furnace tube.

Synthesis methods are provided using electro-chemical catalysis. In one method, diesel fuel is made by (1) flowing a mixture of a triglyceride source and an alcohol through a high voltage electrical field, effective to convert the triglyceride into saturated mono alkyl esters; and (2) adding the saturated mono alkyl esters to a petroleum-derived diesel fuel to form a diesel fuel blend. In another method, a high temperature, oxidatively stable lubricant is made by (1) flowing a renewable oil including unsaturated fatty acids through a high voltage electrical field effective to convert the unsaturated fatty acids into saturated fatty acids; and (2) adding one or more functional additives to the saturated fatty acid-containing renewable oil to form a synthetic lubricant. In another method, ethanol is made by flowing a liquid which comprises a simple sugar through a high voltage electrical field effective to convert the sugar into ethanol without fermentation.

A method for producing a fiber membrane of nanofibers that have both smooth and porous surface features. The method includes materials processing using polymer mixes with solvents and melt polymers with additives. The method includes nanomaterial incorporation onto a fiber structure after formation of the fiber structure. The fiber structure can be a part of a nanoparticle carrier material, a nanoparticle disposal medium, a lighting medium, and a catalysis medium.

The invention discloses a metal phthalocyanine / carbon nanometer pipe compound catalyst, a method for preparing the same and a lithium / thionyl chloride battery using the same, wherein the metal phthalocyanine / carbon nanometer pipe compound catalyst is prepared by evenly and closely loading metal phthalocyanine compounds on a carbon nanometer pipe; and the metal phthalocyanine / carbon nanometer pipe compound catalyst is mixed with carbon black and a binding agent, and the mixture subjected to forming and drying to prepare an anode carbon plate of the lithium / thionyl chloride battery using the catalyst. The metal phthalocyanine compounds are evenly and closely loaded on the carbon nanometer pipe. On one hand, the electrically discharged product of a LiCl film can be loosened by the catalysis of the metal phthalocyanine compounds; on the other hand, a network structure is built up in the carbon anode of the carbon nanometer pipe, which facilitates the electric communication of electrolytes and the improvement of electric conductivity of the electrodes. Due to the synergetic effect of the metal phthalocyanine compounds and the carbon nanometer pipe, the operating voltage of the lithium / thionyl chloride battery is improved. The method has advantages of simple process, simple operation, the suitability for industrialized production and obvious practical values and economic benefits.