110results about How to "High carbonation rate" patented technology

A process for producing a spherical carbon material, comprising: subjecting a spherical vinyl resin to an oxidation treatment in an oxidizing gas atmosphere to obtain a spherical carbon precursor, and carbonizing the spherical carbon precursor at 1000-2000° C. in a non-oxidizing gas atmosphere. The thus-obtained spherical carbon material exhibits excellent performances, including high output performance and durability, when used, e.g., as a negative electrode material for non-aqueous electrolyte secondary batteries.

The invention discloses a method for preparing a carbide film by carbonizing graphene reinforced polyimide resin, and relates to a method for preparing a carbide film. The method solves the technical problems of high carbonizing temperature, high energy consumption, long carbonizing period and low carbonizing rate and low strength of the carbide film in the conventional method for preparing the carbide film. The method comprises the following steps of: 1, adding 4,4'-diamino diphenyl ether (ODA) and 3,3',4,4'-benzophenonetetracarboxylic dianhydride (BTDA) into N,N-dimethyl acetamide (DMAC), and performing mechanical stirring to obtain a polyamide acid (PAA) solution; 2, adding graphene into the PAA solution, and performing in-situ polymerization reaction to obtain a solution A; 3, spreading the solution A on a clean glass plate, heating to the temperature of 60 DEG C and preserving the heat for 2 hours, heating to the temperature of 100 DEG C and preserving the heat for 1 hour, heating to the temperature of 200 DEG C and preserving the heat for 1 hour, heating to the temperature of 300 DEG C and preserving the heat for 1 hour, and thus obtaining a composite film; and 4, carbonizing, naturally cooling to room temperature, and thus obtaining the carbide film. The carbide film has excellent mechanical properties; and because the adding proportion of the graphene is increased, the mechanical properties of the carbide film are improved, the specific capacitance of the graphene is also improved, and the carbide film is suitable to be used as an electrode material.

The invention relates to a nitrogen-doped porous hollow carbon sphere carbon dioxide adsorption material as well as a preparation method and application thereof. The preparation method comprises the following steps: adding SiO2 sphere flowers into mixed liquid of deionized water, absolute ethyl alcohol and ammonia water, and carrying out ultrasonic oscillation until the SiO2 sphere flowers are completely dispersed; and then adding a dopamine hydrochloride water solution, uniformly stirring at the room temperature, filtering, washing, drying, and processing at 700-900 DEG C for 2-4 hours in a N2 atmosphere so as to obtain nano-composite spheres; and finally impregnating the nano-composite spheres in hydrofluoric acid to remove the SiO2 sphere flowers, filtering, washing, and drying, so as to obtain the nitrogen-doped porous hollow carbon sphere CO2 adsorption material. The adsorption material is a porous hollow carbon sphere, the particle sizes of porous hollow nano-carbon spheres are about 400nm, the porous hollow nano-carbon spheres are uniform and regular, and the adsorption material has high nitrogen content, adsorptive property, specific surface area and pore volume and high-dispersed regular appearance, the surface of the adsorption material contains rich amino active sites, and the adsorption material can be applied to efficient adsorption of industrial CO2.

The invention provides a preparation method of polyimide fibers. The method includes performing polymerization reaction to dianhydride and diamine in an aprotic polar solvent to obtain a polyamide acid spinning solution. The diamine comprises one or two of phenyl phosphonic acid (p-aminobenzene) diester and 3, 3'-diamine triphenylphosphine oxide; the polyamide acid spinning solution is squeezed out through a spinneret orifice and enters a coagulating bath to be coagulated to obtain polyamide acid fibers; the polyamide acid fibers are subjected to thermal amination process to obtain polyimide primary fibers; and the polyimide primary fibers are subjected to thermal draft process to obtain polyimide fibers. Phosphorus is contained in the molecular structure of the obtained polyimide fibers, so that not only the char yield of the polyamide fibers is high at a high temperature, but also the polyamide fibers can generate volatile phosphorus compounds to inhibit combustion chain mode reaction in a gas phase and have a superior flame retardant property. Experimental results show that the limit oxygen index of the polyamide fibers is 42 to 50.

The invention discloses a method and a system for preparing a nitrogen-vanadium alloy. Wherein, the method for preparing the nitrogen-vanadium alloy includes: molding the vanadium trioxide powder and the graphite powder to obtain the mixed material agglomerate; transporting the mixed material agglomerate to the feeding area of ​​the rotary hearth furnace for distribution, the The agglomerates of the mixed material pass through the carbonization reduction zone, the nitriding synthesis zone and the cooling zone in sequence, and then are discharged through the discharge zone, wherein the agglomerates of the mixed material enter the carbonization reduction zone for carbonization and reduction treatment to obtain vanadium carbide and carbon monoxide; The vanadium carbide enters the nitriding synthesis zone and undergoes nitriding treatment with nitrogen to obtain a nitrogen-vanadium alloy; the nitrogen-vanadium alloy enters the cooling zone for cooling treatment to obtain a cooled nitrogen-vanadium alloy. The method uses vanadium trioxide and graphite as raw materials to prepare mixed material agglomerates, and carries out carbonization reduction treatment and nitriding treatment step by step in a rotary hearth furnace to obtain a vanadium nitrogen alloy with high nitrogen content and low impurity content.

The invention belongs to the technical field of a constructional material, and relates to an excitant used for carbonizing and curing offal prepared constructional materials. The excitant comprises not less than 50 percent of excitable components by weight which are one or more than one of NaHCO3, soluble glass, plaster, Ca(HCO3)2, NaCl and Na2CO3. The excitant has the advantages that when offal prepared constructional materials are carbonized and cured, the excitant can promote carbonization in carbonization materials through the excitable components by adding the excitant of proper amount, thus increasing the carbonization ratio and reducing the discharged carbon dioxide as a greenhouse gas to great extent, preparing products for carbonizing and curing constructional materials having good performance, and reducing the production cycle with good economic benefit.

The invention discloses a preparation method for a catalysis/adsorption material by taking kieselguhr as a carrier. The preparation method comprises the following steps of adding 15-20 parts of absolute ethyl alcohol into 1 part of purified kieselguhr, then adding 1-3 parts of a metal compound, 0.1-0.3 part of aluminum oxide, 0.1-0.3 part of glass fibers, 0.02-0.04 part of nitric acid and 5-7 parts of deionized water in sequence under magnetic stirring for mixing and stirring; performing centrifugal washing on obtained substances by the deionized water; and drying washed ore pulp at first, and then calcining the ore pulp, thus obtaining the catalysis/adsorption material. The catalysis/adsorption material prepared by the method disclosed by the invention can prolong the retention time of organic pollutants in a reactor by using the adsorption capacity of kieselguhr, and loaded metal oxide can generate a relatively good catalytic oxidation effect in a discharging process, so that the oxidization degree of organic pollutants is increased.

The invention relates to a multifunctional flame retardant as well as preparation and an application thereof. The structural general formula of the flame retardant is as shown in the specification. The preparation comprises the following steps: adding phosphorus oxychloride and triethylamine into a reactor in which the air is exhausted with nitrogen, adding a solvent and sufficiently stirring under the nitrogen protection; adding alcohol or phenol in a separating funnel, and adding a solvent and mixing uniformly; dropwise adding the mixture into the reactor; after the mixture is dropwise added completely, heating and reflowing for reaction; after the reaction is over, reducing the temperature of the system to below 5 DEG C; adding aminopropyl trialkoxysilane in the separating funnel, and adding a solvent and mixing uniformly; slowly dropwise adding the mixture into the reactor, then heating and reflowing for reaction; and performing filtration, rotary evaporation, separation and purification to obtain the product. The flame retardant finishing agent provided by the invention has relatively good flame retardant effect, the finished fabric has high charring rate when being burnt and high laundry resistance, is environment-friendly and efficient, releases no formaldehyde and generates no toxic gas in the burning process. The finishing agent is applicable to purified cotton and cellulose fiber fabrics or blend fabrics thereof.

The invention discloses a structure of a thermal protective coating for a launching pad and an application of the structure. The thermal protective coating material comprises an organic base layer and an organic-inorganic composite surface layer, wherein the organic base layer comprises epoxy resin, polyamide as a curing agent and liquid rubber as a toughening agent; the organic-inorganic composite surface layer comprises organic glue epoxy resin, a polyurethane curing agent, sand and cement. The thermal protective coating material can bear the simulated combustion gas flow scouring of a rocket, the temperature of a metal back surface does not exceed 200 DEG C, and the coating has excellent thermal insulation property.

The invention discloses a carbonization treatment method of a wood plate. The carbonization treatment method comprises the following steps of (1) plate cleaning, (2) surface modification treatment, (3) soaking treatment, (4) carbonization treatment, and (5) cooling treatment. According to the carbonization treatment method, the carbonization effect on the wood plate can be effectively improved, the thickness of a surface carbonization layer of the wood plate is effectively increased, the carbonization rate of a surface layer material of the wood plate is also well increased, meanwhile, reasonably-added nanometer silica enhances the density and mechanical property of the surface layer, the machining defective rate is obviously decreased, and good service value is achieved.

The present invention provides one kind of stocker type thermal decomposing furnace to decompose garbage to generate fuel gas. The thermal decomposing furnace has a stepped grate combination, a stocker to extrude garbage downwards, a garbage feeder over the stepped grate combination, a fuel gas supply device below the stepped grate combination. The present invention can convert most of the garbage into fuel gas and decompose garbage with the combustion heat in raised carbonization rate.

The invention provides a silicone rubber composite material and a preparation method thereof and belongs to the field of silicone rubber composite materials. The silicone rubber composite material comprises, by weight, 100 parts of a silicone rubber base component A, 5 parts of a silicone rubber base component B, 5-10 parts of an anti-burning filling material, 5-10 parts of a fireproof heat-insulation filling material, 2-5 parts of a flame-retardant cooling filling material and 1-3 parts of a heat stabilizer. The silicone rubber base component A comprises silicone base resin, organosilicone oil, a binder and white carbon black. The silicone rubber base component B contains a phenolic epoxy group and through use of excellent adhesion and high carbon content of the phenolic epoxy group, burning resistance of the organosilicone resin is improved. Through use of the phenolic resin, a carbonization yield of the silicone rubber composite material is improved and a better carbonization layer is formed and has effects of isolation and heat absorption and thus a part at the back of the silicone rubber fireproofing sealing agent can be protected well.

The invention discloses a structure for a thermal protective coating of a rocket launching pad and an application thereof. The thermal protective coating is composed of materials in three layers, namely, an organic bottom layer, refractory bricks and an organic-inorganic compound surface layer, wherein the organic bottom layer is composed of epoxy resin, solidifying agent polyamide and flexibilizer liquid rubber; clay refractory bricks are adopted as the refractory bricks; the organic-inorganic compound surface layer is composed of organic rubber epoxy resin, polyurethane curing agent, sand and cement. The material of the thermal protective coating provided by the invention can endure the scouring of the simulated fuel gas flow of a rocket; the temperature on a metal rear surface is not above 200 DEG C; the coating has an excellent heat-insulating property.

The invention belongs to the technical field of building materials and relates to an enhancer for the building materials which are prepared by taking wastes (including different types of steel slag, furnace slag, smelting slag, sludge, red sludge, incineration ash and waste cement, and the like) as main materials for absorbing CO2 waste gas, in particular to the enhancer for the building materials which are prepared by the carbonation curing wastes and using steel slag and cement as the main materials for absorbing the CO2 gas. The enhancer contains more than 50 percent by weight of easily carbonized ingredients, and the easily carbonized ingredients are one or more of calcium hydroxide, calcium oxide, portland cement or waste concrete. The enhancer of the invention plays the roles in strengthening and improving the carbonation rate, improves the strength of the building materials which are prepared by carbonation and curing and the CO2 absorption rate and shortens the production cycle.

The invention provides carbonized fibers. The carbonized fibers are formed by opening a carbonized base cloth, the carbonization rate of the obtained carbonized fibers is greater than or equal to 99.996%, and the strength unevenness of the carbonized fibers is less than or equal to 0.66%; the hydrostatic pressure resistance of the carbonized base cloth is 512-524 mm/H2O; and air permeability is 274-280 L/(m2. S), and after washing, the air permeability is 279-303 L/(m2. S). The invention also provides a preparation method of the carbonized fibers. The preparation method comprises the steps ofraw material preparation, base cloth preparation and carbonization activation, in raw material preparation, Lyocell fibers are selected; the carbonized fibers are good in shape stability, not easy todeform, and low in deformation rate after washing; the flame retardant property is improved, and thus, the carbonized fibers have a wide market prospect.

The invention discloses a high-performance ablation-resistant coating which comprises an inner heat insulation layer and an outer temperature-resistant layer. The invention further discloses a preparation method of the high-performance ablation-resistant coating. The coating has strong bonding strength and can tolerate instantaneous high temperature above 1500 DEG C, effectively obstructs externalheat flow to protect internal devices of a base material, still has good repairable performance after multiple times of heat flow scouring, and has strong practical application value.

Provided are a method of preparing a high softening point pitch and the high softening point pitch prepared thereby, in which a polyene radical intermediate is formed, and an alkylaromatic radial material is linearly linked to the polyene radical intermediate in a benzyl or methylene form to be polymerized. The method includes performing heat treatment by adding a compound, which is able to a polyene radical intermediate, to 1- to 4-ring alkylaromatic condensates to produce a basic pitch, and performing vacuum heat treatment for the basic pitch.

A method of producing an acoustic diaphragm includes forming a workpiece having a shape of the acoustic diaphragm by using a natural material which can be carbonized by burning, impregnating a solution including phenol resin into the workpiece, heating the workpiece to bring the phenol resin into a high polymer state, burning the workpiece in a substantially anoxic atmosphere to carbonize the natural material after the heating step, and applying or impregnating the workpiece with a coating material of a solution including phenol resin after the burning step.

The invention provides a preparation method of sodium bichromate. The preparation method comprises the following steps of: (1) adding 700-1,350 g.L<-1> sodium chromate neutral solution of a chromium compound in terms of Na2Cr2O7.2H2O into a carbonization reactor; (2) continuously supplying carbon dioxide into the carbonization reactor, and controlling partial pressure of carbon dioxide to be 0.01-1.5 MPa, reaction temperature to be 15-105 DEG C and reaction time to be 0.5-8.0 h; (3) separating carbonized feed liquid obtained by the step (2) to obtain carbonized liquid and sodium bicarbonate crystals, wherein the concentration of the chromium compound in the carbonized liquid is 700-1,350 g.L<-1> in terms of Na2Cr2O7.2H2O; and (4) crystallizing and dehydrating the carbonized liquid to obtain the sodium bichromate. By preparing the sodium bichromate through the preparation method, the conversation rate from the sodium chromate to the sodium dichromate can reach 95-100 percent, the quality of the sodium bichromate is high, and the sulfate content is less than 0.1 percent by weight.

The invention discloses a halogen-free multi-effect wood flame retardant and a preparation method thereof. The halogen-free multi-effect wood flame retardant comprises the following preparation raw materials in parts by weight: 70-99 parts of a flame retardant component, 1-3 parts of a moisture resistant agent, 1-3 parts of an anti-rust agent, 1-3 parts of a mildew preventive, 1-2 parts of a quickdrying agent and 1-5 parts of a nano oxide. The flame retardant provided by the invention is low in cost, halogen-free and more environment-friendly, and the flame-retardant wood prepared by the invention has excellent flame retardancy, excellent mildew resistance, excellent rust resistance and excellent quick drying capacity.

The invention discloses a hyperbranched phosphorus-containing oxygen group functionalized silicon-based resin flame retardant, which is provided with a branched silicon atom-containing molecular skeleton and a phosphorus-containing oxygen group chemically bonded to the silicon atom of the molecular skeleton. The phosphorus-containing oxygen group functionalized silicon-based resin is obtained by (1) reacting a silane compound having three or more condensable functional groups with at least one hydroxyl group-containing compound to form a branched silicon-based resin, and (2) introducing a phosphorus-containing oxygen group to the silicon-based resin to obtain the hyperbranched phosphorus-containing oxygen group functionalized silicon-based resin flame retardant. A flame-retardant polymer composition containing the flame retardant is high in carbon forming rate, high in oxygen index and good in flame-retardant effect.

The invention provides a method for production of carbonized solids and soluble liquid from food waste and a device for production of the same. The method includes the steps that food waste is thrown into a heating pressure reactor with a steam generation device, and saturated steam is thrown into the heating pressure reactor from the steam generation device to enable the food waste to be separated into soluble liquid and carbonized solids. According to the method for production of carbonized solids and soluble liquid from food waste, the saturated steam supplied by the steam generation device is supplied into the reactor through a primary steam supply pipe and a secondary steam supply pipe respectively, the primary steam supply pipe and the secondary steam supply pipe can be opened and quickly meet the required thermodynamic conditions while the heating pressure reactor starts operating, in the operating process of the heating pressure reactor, the secondary steam supply pipe supplies steam into the heating pressure reactor intermittently in order to supplement heat energy in short supply and increase the saturated steam needed by internal heat transfer.

The invention discloses a supercapacitor electrode material and a preparation method thereof. The preparation method comprises the following steps of: by taking potassium permanganate as a reducing agent and manganese sulfate as a manganese source, preparing sea urchin-shaped nano alpha-MnO2 by adopting a hydrothermal method, then performing hydroxylation modification, grafting polyimide resin tothe sea urchin-shaped nano alpha-MnO2 by adopting a click chemistry mode to obtain the sea urchin-shaped nano alpha-MnO2 grafted polyimide resin, and carrying out high-temperature activation treatmenton the sea urchin-shaped nanometer alpha-MnO2 grafted polyimide resin by adopting potassium hydroxide to obtain the sea urchin-shaped nanometer alpha-MnO2 in-situ modified porous carbon supercapacitor electrode material. By using the electrode material, the defects of MnO2 crystal lattices are improved, the conductivity and stability of electrons are improved, protons and the electrons can freelyflow among the crystal lattices, rapid transmission of ions and the electrons of an interface is guaranteed, the charge transfer path can be shortened, more active sites are provided for charge storage, the electron trapping and transfer capacity is enhanced, and the mechanical stability is also improved.

The invention provides a roasting technology for isostatic pressing formed graphite. The roasting technology comprises the steps that the outer surface of a graphite green body is coated with a layerof organic coating film uniformly before the primary baking of the graphite green body, so that direct contact between a graphite product and sand is isolated in a roasting process, a carbonization process of the organic coating film is used for absorbing organic gas volatilized during a heating process of the graphite product, and at the same time, a purpose of pressurization is achieved by relying on the self gas expansion generated by the graphite product in the roasting process, so that a pressure roasting device is used for roasting according to a roasting pressure process curve. A technical problem that sand is liable to stick to the surface of the graphite product after roasting in the prior art is solved, and at the same time, the coke separating amount of the product is improved.