31results about How to "Play a pore-forming role" patented technology

The invention discloses an insulation and heat dissipation material for an electric heater shell and a preparation method of the insulation and heat dissipation material, and relates to the technicalfield of insulation materials. The insulation and heat dissipation material is prepared from the following raw materials in parts: 44 to 46 parts of polyvinyl chloride, 24 to 26 parts of ABS (Acrylonitrile Butadiene Styrene) resin, 24 to 26 parts of polyethylene glycol terephthalate, 19 to 21 parts of polyimide, 15 to 20 parts of tourmaline-graphene composite powder, 10 to 15 parts of carbon fiber, 4 to 6 parts of rosin, 4 to 6 parts of lithium-based bentonite, 3 to 5 parts of zinc ethylphenyl dithiocarbamate, 3 to 5 parts of halogen flame retardant, 2 to 4 parts of anti-aging agent, 1 to 3 parts of antistatic agent, 1 to 3 parts of stabilizer and an appropriate amount of deionized water. The insulation and heat dissipation material disclosed by the invention has good heat dissipation andinsulation properties, and is not easy to deform and high in stability.

The invention relates to a lightweight concrete material and a preparation method thereof, and belongs to the technical field of building materials. According to the technical scheme, the surface of ceramsite is coated with a composite elastomer material to form effective elastic load, so that the mechanical strength of the material is effectively improved, meanwhile, the stress of internal pores of the concrete material can be effectively improved through elastic particles, and the mechanical property of the concrete material is improved from another angle; and according to the technical scheme, the coated porous ceramsite material is used as a modified base material, the roundness of the surface of the base material filled in the concrete material is increased along with the effective load of base particles, the angular coating of the surface is gradually reduced, and the nano sol material is substituted into the concrete, so that the compactness of the concrete is increased, and the mechanical strength of the material is further improved.

The invention provides a preparation method of a wear-resistant large-pore-volume microspherical silica carrier. The preparation method comprises the steps: roasting a precipitated silicon dioxide powder or white carbon black with the specific surface area of 250-600 m<2>/g at the temperature of 730-760 DEG C to make the specific surface area reduced to 100-220 m<2>/g; adding water, mixing evenly, and grinding silicon dioxide micro-particles to the average diameter of 2-5 [mu]m; adding acetic acid and ammonium acetate, and performing crystallization treatment at the temperature of 150-180 DEG C; and adding an activated carbon emulsion and acidic silica sol, mixing evenly, performing spray granulation, and roasting the granulation powder at the temperature of 650-720 DEG C. The prepared carrier has proper pore structure including higher specific surface area, pore volume and larger average pore size, has higher mechanical strength, higher wear resistance and higher impact resistance, is suitable for further loading active components, and is used for preparation of a catalyst for fluidized beds.

The invention provides a method for preparing a wear-resisting large-pore-volume micro-spherical silicon dioxide carrier. The method comprises the steps that precipitation method silicon dioxide powder or white carbon black with the specific surface area of 250-600 m<2>/g is calcined at the temperature of 730 DEG C to 760 DEG C, the specific surface area of the precipitation method silicon dioxide powder or white carbon black is reduced to 100-220 m<2>/g, and water is added for even mixing; grinding and dispersing are carried out till the average diameter of microparticles ranges from 2 micrometers to 5 micrometers, activated carbon emulsion and a white carbon black emulsus glue solution are added for even mixing, and spray granulation is carried out; pelleted powder is calcined at the temperature of 650 DEG C to 720 DEG C, the micro-spherical silicon dioxide carrier with the average diameter of 50-250 micrometers is prepared, the specific surface area ranges from 60 m<2>/g to 120 m<2>/g, the pore volume ranges from 0.7 ml/g to 1.1 ml/g, and the average pore diameter ranges from 35 nm to 50 nm. High mechanical strength, wear resistance and impact resistance are achieved, and the carrier is suitable for further loading active components and preparing a catalyst for a fluidized bed.

The invention belongs to the technical field of hydrogel, and particularly relates to a preparation method of magnetic hydrogel. In the preparation process, calcium oxide is taken as a raw material, firstly, the raw material and nanometer titania are heated, then the effect of carbon dioxide is utilized, nano calcium carbonate is formed, and under the effect of an auxiliary agent, the nano calciumcarbonate is continuously combined with the nanometer titania; dispersion performance is added for polyvinylpyrrolidone, then the polyvinylpyrrolidone, ferric chloride and ferrous chloride are mixed,magnetic particles are formed and uniformly distributed on the surfaces of mixed particles at the same time, the crystal form is improved through a guiding agent, and finally, polyacrylamide is formed for wrapping; groups on the surfaces of the particles can be combined with polyacrylamide well, the effect is utilized that the nano calcium carbonate is combined with the nanometer titania, gaps can be formed well for loading the magnetic particles, and by utilizing formation of a nano-substance, the mechanical performance and magnetic performance of the hydrogel can be effectively improved.

The invention provides a magnetic MgO nanoflower phosphate adsorbent, a preparation method and application thereof, and belongs to the technical field of adsorbents. The preparation method provided bythe invention comprises the following steps: mixing polyvinylpyrrolidone, ethylene glycol, ammonia water, magnesium acetate and cobalt acetate, carrying out a solvothermal reaction on the obtained mixed solution, and separating to obtain a solid product; and calcining the solid product to obtain a magnetic MgO nanoflower phosphate adsorbent, wherein the calcination temperature is 600 to 900 DEG C. The adsorbent prepared by the method provided by the invention has a porous lamellar flower-shaped structure, wherein the specific surface area is up to 209 m<2>/g, the effective adsorption sites are uniformly distributed in the flower-like lamellas, and the effective adsorption sites are rich due to the lamellar flower-like structure, so that the adsorbent has high adsorption selectivity, wid pH application range and high phosphorus adsorption rate under the interference of numerous anions, and the orthophosphate adsorption capacity is as high as 230.5 mg/g.

The invention provides a preparation method of a wear-resistant large-pore-volume microspherical silica carrier. The preparation method comprises the steps: roasting precipitated silica powder or white carbon black with the specific surface area of 250-600 m<2>/g at the temperature of 730-760 DEG C, and making the specific surface area reduced to 100-220 m<2>/g; adding water to the precipitated silica powder or white carbon black, adding an acid, adjusting the pH to 2-3, grinding and dispersing until the diameters of micro particles are all 1 [mu]m or less, adding the roasted silica powder, grinding and dispersing until the average diameter of micro particles is 2-5 [mu]m, adding an activated carbon emulsion, mixing evenly, carrying out spray granulation, roasting at the temperature of 650-720 DEG C, and thus obtaining the microspherical carrier with the average diameter of 50-250 [mu]m, the specific surface area of 80-200 m<2>/g, the pore volume of 0.7-1.1 ml/g, and the average pore diameter of 20-40 nm. The prepared microspherical silica carrier has the advantages of wear resistance and impact resistance, and is suitable for preparation of a catalyst for a fluidized bed.

The invention provides a regeneration method of a hydrogenation catalyst. The method comprises the following steps: (1) mixing inactivated hydrogenation catalysts A1 and A2, soaking the mixture in a solvent, and carrying out ultrasonic treatment to obtain a catalyst B and a mixed material mixed with black powder; (2) recovering the catalyst B, and filtering the mixed material mixed with the black powder to obtain powder C; (3) grinding the catalyst B into powder, and screening to obtain catalyst powder D; forming, drying and roasting the catalyst powder D to obtain a regenerated carrier; (4) dissolving the powder C in liquid paraffin, and stirring; and then dipping on a regenerated carrier, cooling, carbonizing, and carrying out hydro-thermal treatment to obtain the regenerated hydrogenation catalyst. According to the method, active metal components do not need to be additionally supplemented, the desulfurization performance of the regenerated catalyst is good, the dosage of a vulcanizing agent can be reduced, the vulcanizing time can be shortened, and the obtained regenerated hydrogenation catalyst has a reasonable pore structure, strength and metal distribution.