140results about How to "Evenly distributed holes" patented technology

The invention discloses a hydrorefining catalyst and a preparation method thereof. The catalyst is a bulk phase hydrorefining catalyst, and comprises alumina and hydrogenation active metal components W, Ni and Mo. The surface phase of the catalyst has the characteristics of high content of active metals, large density of active sites, uniform dispersion of the active metals, good coordination and cooperation among the active metals, and high utilization rate of the active metals, and the catalyst has the characteristics of reasonable pore structure, high mechanical strength and high hydrodesulfurization and hydrodenitrogenation reaction performances, and is especially suitable for being applied to ultra deep hydrodesulfurization and nitrogen removal reaction of diesel oil fraction.

A CaO-P2O5-Na2O-MgO glass reinforced porous beta-tricalcium phosphate bioceramic is prepared through proportionally mixing P2O5, CaO, Na2O and MgO, smelting, heat treating for educing crystals to obtain bioglass, proportionally adding it to beta-calcium triphosphate powder, and porous foam immersion.

The invention discloses a preparation method of a hydrotreatment catalyst, comprising the following steps of: introducing silicon and boron additives in the way that an organic silicon source is added after aluminium hydroxide gel forming and then a boron-containing organic compound solution is added, so as to obtain silicon and boron containing aluminium hydroxide, mixing parts of an active metal component with boron-containing aluminium hydroxide by a kneading method, carrying out three-stage roasting to obtain a catalyst intermediate, loading residual part of the active metal onto the catalyst intermediate by dipping, and drying to obtain the hydrotreatment catalyst. By the adoption of the method provided by the invention, the silicon and boron additives and the active metal component are uniformly distributed on the surface of the catalyst. In addition, the active metal component has different existing forms in the catalyst when introduced in the two modes, loss rate of the catalyst activity is reduced by mutual cooperation, and running period of a device is prolonged. The catalyst has large pore volume, large specific surface area, appropriate pore structure and acidity, and is especially suitable for hydrodenitrogenation process of heavy hydrocarbon.

The present invention discloses a hydrorefining catalyst preparation method. According to the method, a nickel aluminum precipitate is prepared through a positive adding method, a tungsten, molybdenum and aluminum precipitate is prepared through a parallel flow method, an organic amine is added during any one or two above gelatinization processes, the two precipitates are mixed, aging is performed, a hydrothermal treatment is performed while urea is added, and molding and the like are performed to prepare the catalyst. According to the present invention, the prepared catalyst is particularly suitable for super deep hydrodesulfurization and denitrification reaction of diesel oil distillates, and has high hydrodesulfurization and hydrodenitrogenation activity.

The invention discloses a preparation process of a high-performance coating diaphragm having a surface coated with an organic layer, and relates to the technical field of production of lithium ion battery microporous membranes. The process comprises the steps of: dissolving organic viscous high-temperature resin and an additive in an organic solvent to form a polymer solution; then coating the surface of a diaphragm substrate with a polymer solution in a dip-coating or gravure-coating mode; and finally, performing drying in an oven at a temperature of 50-120 DEG C. According to the high-performance coating diaphragm prepared by employing the method, the surface of the substrate is coated with a layer of viscous high-temperature resin so that the problem of bonding of a microporous membraneand a pole piece is solved, and meanwhile, the falling of stepless particles can be well avoided, and therefore, the safety of a lithium battery is solved, and the performance of the lithium batteryis fully played.

The invention relates to the field of porous ceramics, in particular to a method for preparing a porous ceramic by using a tertiary butanol-based freezing sublimation method. The method disclosed by the invention basically has no restriction to an oxide material system and is generally suitable for engineering ceramics. The method comprises the following steps of: with oxide ceramic powder as a raw material, tertiary butanol as a solvent, citric acid as a dispersing agent and polyvinyl butyral as a binding agent, carrying out ball grinding on the raw material for 5-50h, pouring the uniformly-dispersed raw material into a polyethylene mold of which the bottom temperature is above 0 DEG C and the top temperature is room temperature, and cooling for 5min-2h; and demolding, then sublimating for 24-27h by using a water circulating pump under the condition of suction filtering, and heating to 1200-1600 DEG C in an air furnace and preserving the temperature for 5min-2h. According to the method disclosed by the invention, slurry of an organic system is prepared under the room temperature; and the obtained porous ceramic is distributed with directional holes, wherein the directional holes are polygonal holes and have the size distribution of below 100 microns and the longitudinal lengths of reaching millimeter-scale. According to the method disclosed by the invention, the porosity can be controlled by adjusting the solid content, and the porous ceramic material with ultrahigh porosity (more than 80 percent) can be prepared.

The present invention belongs to the field of polymer material and biological material technology, and is especially one porous rack with spherical pores and its molding preparation process. The 3D porous rack is prepared with polymer material as base material and through molding at normal temperature. The simple process may be used in preparing both rack with simple and regular outer appearance and rack with complicated and irregular outer appearance. The prepared porous rack may be relatively thick and has regular spherical pore structure of porosity over 90%, and the pores are communicated mutually and homogeneously distributed. The rack has high mechanical strength, and is suitable as 3D porous cell rack in tissue engineering and in other application fields.

The invention relates to a method for preparing a porous polyvinylidene fluoride alloy membrane for wastewater treatment and recycling, and belongs to the technical field of membrane separation technology and wastewater treatment and reutilization. The method comprises the following steps: firstly, weighing polyvinylidene fluoride, polymethyl methacrylate, a diluent or a latent solvent, and an additive according to proportion, placing the raw materials into a mixer in turn for mixing, cooling and granulating the mixture in the air, and obtaining blend raw materials; and secondly, adding the blend raw materials into a double screw extruder to form fused blends, making the fused blends be extruded by double screws and pass through a filter and a spinning pump in turn to form hollow nascent fibers, cooling and washing the hollow nascent fibers, and drying the hollow nascent fibers in the air. The porous polyvinylidene fluoride alloy hollow fiber microporous membrane prepared by the method has good chemical corrosion resistance and hydrophilicity, high strength, large flux, good toughness, uniform pore distribution and superior pollution resistance, and is most suitable to be used in MBR.

The present invention relates to preparation process of hydrocarbon hydroprocessing catalyst, which has gamma-Al2O3 as carrier, VIB and VIII metal as the active component, and Ti, etc as the active assistant, with the assistant Ti being introduced in the pH swinging carbonization process for producing aluminum hydroxide. The process of preparing the catalyst is one complete mixing and kneading process including the steps of introducing Ti to aluminum hydroxide powder via adding Ti salt solution, adding Mo and/or W containing alkaline solution, mixing and kneading until the aluminum hydroxide powder is wetted completely by the alkaline solution, adding Co and/or Ni containing acid solution, mixing and kneading to obtain plastic material, extruding, drying, and roasting to obtain the catalyst. The catalyst has homogeneously distributed Ti component and obviously raised performance.

The invention discloses an electrode material and preparing material, which consists of chopped carbon fiber and heat cohesion fiber at 20-70:80-30 weight rate. The invention reduces manufacturing cost, which makes porous carbon fiber with even distributing porthole, high permeating degree, good strength and low resistance rate.

The invention relates to a method for preparing mesoporous activated carbon fibers, belonging to the technical field of preparation methods of activated carbon fibers, and mainly solving the technical problems of difficulty in continuous spinning, non-uniform pore distribution of the product, complex production process, high requirement on equipment performance, high production cost and large industrial difficulty existing in a conventional method for preparing mesoporous activated carbon fibers. With the adoption of the technical scheme, the method for preparing mesoporous activated carbon fibers comprises the following steps: preparing an impregnant, impregnating, performing extrusion-suction, curing, carbonizing and activating and pickling. The method disclosed by the invention has the advantages of capability of performing continuous spinning, uniform pore distribution of the product, simple production process, low requirement on equipment performance, low production cost and simplicity in industrialization.

The invention discloses a method for preparing a high-flux polyvinylidene fluoride hollow fiber membrane. The method comprises the following steps of: mixing polyvinylidene fluoride, a gaseous pore-forming agent, a hydrophilic modifier, additives and organic solvents and making a membrane-making solution; allowing an internal gelling medium and the membrane-making solution to pass through spinning nozzles on dry/wet spinning equipment at the same time, injecting into an external gelling medium, and performing phase-splitting treatment to make a primary membrane; and performing special chemical treatment on the primary membrane with a chemical treatment liquid to obtain a high-flux polyvinylidene fluoride hollow fiber membrane. The invention is characterized in that the membrane is reinforced with the pores by chemical reactions between the internal gelling medium, external gelling medium and chemical treatment liquid and the gaseous pore-forming agent; and the polyvinylidene fluoride hollow fiber membrane has a high flux, a high strength, a high entrapment rate and good hydrophilicity.

The invention discloses a high-sensitivity pressure sensor based on graphene with a pointed cone structure. The pressure sensor is a composite structure of graphene whose surface is provided with a pointed cone structure and other insulating and porous two-dimensional materials. First, the insulating and porous two-dimensional materials cover the graphene with a pointed cone structure followed by the plating of electrodes; then, the other graphene with a pointed cone structure after the plating of electrodes is placed onto the insulating and porous two-dimensional materials so as to obtain a sandwich-like pressure sensor. The height, the width and the distribution density of the pointed cone of the graphene are uniform and controllable. The pores of the insulating and porous two-dimensional materials are also distributed in a uniform manner with the pore diameters and depths being controllable. According to the invention, a high-sensitivity pressure sensor with pointed cone graphene comes into being, and a method for conveniently and rapidly manufacturing the sensor in large scale is provided. The method can also be used for new flexible electronic devices such as artificial intelligence, etc.

The invention belongs to the technical field of capacitive pressure sensors, and particularly relates to a capacitive pressure sensor and a preparation method thereof. The sensor comprises electrodes,an ionic gel dielectric layer and wires, wherein the electrode is composed of a substrate of which the surface is provided with a silver nanowire layer; a wire extending to the outside of the silvernanowire layer is embedded in the silver nanowire layer; the ionic gel dielectric layer is arranged on the surfaces of the silver nanowire layers on the top electrode and the bottom electrode; the structure of the ionic gel dielectric layer is as follows: columnar ionic gel is distributed on the surface of a substrate layer; wherein the substrate layer in the ionic gel dielectric layer is arrangedon the silver nanowire layer of one electrode, and the silver nanowire layer of the other electrode is arranged on the columnar ionic gel in the ionic gel dielectric layer. The prepared sensor is high in sensitivity, small in hysteresis and good in repeatability, and can be widely applied to electronic skin, wearable products, implantation equipment and multifunctional sensor systems.

The invention discloses a preparation method of a porous silicon dioxide antireflection film. The preparation method comprises the following steps: (1) preparing a silicon dioxide nano hollow particle sol from ethyl orthosilicate, cetyl trimethylammonium bromide, a phosphate buffer solution and an alkali catalyst used as raw materials; (2) dialyzing the silicon dioxide nano hollow particle sol through a dialysis bag, baking, and annealing to obtain silicon dioxide hollow sphere particles; (3) preparing a colloidal solution from the silicon dioxide hollow sphere particles, ethyl orthosilicate, deionized water, an acid catalyst and anhydrous ethanol used as raw materials; and (4) performing dip coating on a clean glass substrate in the colloidal solution, and annealing to obtain the porous silicon dioxide antireflection film. The antireflection film prepared by the method is a closed-pore porous film, and simultaneously has the characteristics of high transmittance, large hardness and film adhesion and good weather resistance.

The invention discloses a lithium ion battery silicon doped carbon porous composite film and a preparation method thereof. The preparation method comprises the following steps: firstly, oxidizing monatomic silicon, modifying the oxidized monatomic silicon through organo-siloxane so as to obtain modified monatomic silicon, preparing a silicon doped carbon composite film through a mixed solution prepared from the organo-siloxane modified monatomic silicon, a carbon-based polymer, a foaming pore forming agent and an organic solvent, and by taking hydrocarbon as a carbon source and an inert gas asa carrier gas, depositing a carbon nano material on the silicon doped carbon composite film by using a chemical vapor deposition method, and performing a method of sublimation pore forming with a foaming agent, thereby obtaining the lithium ion battery silicon doped carbon porous composite film. When the lithium ion battery silicon doped carbon porous composite film is used as a lithium ion battery cathode material, the primary lithium insertion capacity of the material is up to 1027.6mAh/g, the primary lithium removal capacity of the material is 997mAh/g, the coulombic efficiency of the material is 97.02%, the coulombic efficiency of the material is 91.31% after 100 times of circulation, and excellent charge and discharge properties are achieved.

The invention relates to a preparation method of a Ti-matrix insoluble anode and belongs to the field of preparation technologies of electrode materials and resource utilization technologies of waste lead storage batteries. Particularly, metal Ti is used as an electrode matrix, PbSO4 obtained through separation and refinement of lead of the waste lead storage batteries is used as a raw material, a polymeric precursor thermal decomposition-lead sulfate electrochemical oxidation coupling technology is adopted, PbO2 is prepared through PbSO4 anode oxidation, and the obtained PbO2 is directly used as an electro-catalytic electrode material. The preparation method mainly comprises technological processes such as surface treatment of the Ti matrix, interlayer coating, drying and roasting, active layer coating, electrode drying, PbSO4 electrochemical oxidation and the like. The method is simple and can meet different electrode usage requirements by changing electrolyte and operation conditions, meanwhile, a rare earth mixture is added to an electrochemical oxidation solution, the surface of an electrode is treated with a rare earth modification technology, the performance of the electrode can be further improved, and the performance of the electrode is regulated and controlled.

The invention relates to a method for preparing a porous foam insulation material by microwave heating alkali metal silicate, which is characterized in that alkali metal silicate is directly heated by microwave for producing an insulation material with low heat conduction coefficient and the usage temperature of -200 DEG C<=T<=1100 DEG C. The method for preparing porous insulation material by microwave heating alkali metal silicate enables uniform heating from the outside to inside of the raw material, which solves the problems of uneven heating of the raw material, environmental pollution and high dissipating energy caused by heating a heating furnace from outside to inside. The produced material can be used for direct usage after microwave foaming, and enables long-term usage when the temperature is lower than 450 DEG C; the usage temperature of the prepared porous foam insulation material can be raised to 1100 DEG C after being treated by acid. The method of the invention has the advantages of simple production technology, short production period; simultaneously the material has the merits of good heat insulation performance and low density. The inorganic insulation material has excellent fireproof function, and can be used for building insulation as well as external layer insulation for kilns and heating furnaces.

The invention discloses a method for preparing a catalyst by hydrotreatment. The method comprises the following steps: gelatinizing aluminum hydroxide and adding a stable boron-containing organic compound solution, introducing a boron auxiliary agent to obtain the boron-containing aluminum hydroxide, mixing active metal ingredients with boron-containing aluminum hydroxide by a wet-mixing-kneadingmethod, three-segment roasting to obtain a catalyst intermediate, dipping the residual partial active metal and loading on the catalyst intermediate, drying to obtain the hydrotreatment catalyst. According to the invention, the boron auxiliary agent and the active metal ingredients are uniformly distributed on the surface of the catalyst, active metal ingredients introduced by two modes has different forms in the catalyst, mutual cooperation enables reduction of activity loss rate of the catalyst, and the running period of the apparatus can be prolonged. The catalyst has the characteristics of large pore volume and large specific surface area, and possesses proper pore structure and acidity, is especially suitable for hydrodenitrogenation process of heavy hydrocarbon.

The invention discloses a hydrotreating catalyst and a preparation method thereof. The catalyst is a bulk-phase catalyst; components of the hydrotreating catalyst comprise hydrogenation active metal ingredients W, Ni and Mo, and aluminum oxide, wherein the W and the Ni exist in the form of a compound oxide: NixWyOz; the Mo exists in the form of MoO3. The active-site density of the active metal W and Ni in the epiphase of the catalyst is high; the utilization rate of hydrogenation active metal is high; meanwhile, the pore structures of the catalyst are reasonable; the active metal is more uniformly dispersed; the mechanical strength is high; the hydrotreating catalyst is particularly suitably applied to the ultra-deep hydrodesulfurization and denitrification reactions of a diesel fraction.

The invention discloses a preparation method of a bulk phase hydrogenation treatment catalyst. The composition of the catalyst includes hydrogenation active metal components W, Ni and Mo, alumina, and its preparation method is to prepare nickel and aluminum precipitate slurry I by acid precipitation method; adopt co-current precipitation method to prepare tungsten and aluminum precipitate slurry II, mix the two, after aging, hydrothermal treatment with water vapor and add urea, then combine with MoO ₃ After beating and mixing evenly, soaking in the solution containing organic compounds, and then forming and other steps to prepare the hydrogenation treatment catalyst. The catalyst is particularly suitable for application in ultra-deep hydrodesulfurization and denitrogenation reactions of diesel fractions.

A degradable tubular high-molecular porous foam material used as the porous cell scaffold of blood vessel tissue or nerve tissue engineering is prepared from a high-molecular material through use of combined mould. Its advantages are high porosity up to 90% and uniform distribution of pores.