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898results about How to "Strong heat resistance" patented technology

Low-temperature SCR (Selective Catalytic Reduction) catalyst based on active coke loaded manganese-cerium composite oxide and preparation method of low-temperature SCR catalyst

The invention provides a low-temperature SCR (Selective Catalytic Reduction) catalyst based on an active coke loaded active component and a preparation method of the low-temperature SCR catalyst. The catalyst is suitable for SCR reaction of nitrogen oxides under the condition of low temperature. A Mn and Ce composite oxide is loaded on an active coke particle with a relatively high special surface area and mechanical strength, so that the SCR reaction temperature is reduced, the adsorption capability and mechanical wear resistance of the catalyst are improved, and the whole sulfate resistance and regeneration capability of the catalyst are improved. The preparation method provided by the invention is simple in step, artful in process design and convenient for industrial production. The catalyst provided by the invention takes the active coke particle as a carrier on which the Mn and Ce composite oxide is loaded. Oxides of modified elements can also be loaded on the carrier of the catalyst, wherein the modified elements are selected from one or more of the following elements: Fe, Zr, Si, Ti, V, Mo, W, Cr, Au, Ag, Pt, Pd, Rh and Co.
Owner:GUODIAN ENVIRONMENTAL PROTECTION RES INST CO LTD

Fabricated prestressed heat-resistant cement concrete pavement and construction process thereof

The invention discloses a fabricated prestressed heat-resistant cement concrete pavement and a construction process thereof. The pavement is formed by splicing a plurality of fabricated prestressed heat-resistant pavement plates which are parallelly paved and connected into a whole through transverse prestressed steel stranded wires, wherein each fabricated prestressed heat-resistant pavement plate comprises a fabricated prestressed pavement plate which consists of a plurality of pavement plate blocks connected through connecting plates, and a vermiculite concrete heat-resistant paving layer which is paved on the fabricated prestressed pavement plate; each pavement plate block comprises a plurality of common plates which are connected into a whole through longitudinal prestressed steel stranded wires; and the connecting plates and the common plates are cement concrete prefabricated plate blocks. The construction process comprises the following steps of: 1, prefabricating the cement concrete prefabricated plate blocks; 2, transporting the cement concrete prefabricated plate blocks; and 3, paving the pavement. The pavement is reasonable in structural design, convenient to construct, low in input cost and short in construction period, and has heat resistance, construction quality is easy to ensure, and various practical problems of the traditional fabricated cement concrete pavement can be solved.
Owner:CHANGAN UNIV

High-density fermentation and purification process for recombination high temperature-resistant hyperoxide dismutase

The present invention provides a high density fermentation and a purification process of a recombination high temperature resistance superoxide dismutase, the construction method of the invention includes: using gene coded for SOD in a thermophilic bacteria as a template, designing specific primer amplification target gene having restriction enzyme sites, after double digestion, connecting to plasmid vector pET28a after the same double digestion, constructing a recombinant plasmid, named for pSOD, transforming plasmid pSOD to competence escherichia coli BL21(DE3) by chemical transformation method, obtaining strain having high SOD yield after screening, completing the construction of SOD engineering bacteria; the fermentation process includes four steps of first order seed culture, secondary order feed culture, batch fermentation and induced expression, fermentation product SOD is finally obtained; the fermentation process realizes high level expression of SOD, the expression of the target protein is more than 60% of the bacterial protein total; SOD has excellent thermal stability and heat resistance, the expression product accounts for more than 60% of the whole proteins, and fully soluble protein, avoiding any trouble in the course of inclusion body renaturation; the purification process is simple, having high yield, lower cost, the final product SOD has high purification, high activity and strength stability.
Owner:YANGTZE DELTA REGION INST OF TSINGHUA UNIV ZHEJIANG +1

Preparation method and product of low-roughness polyimide film and application of product

The invention discloses a preparation method and a product of a low-roughness polyimide film and application of the product. The preparation method comprises four steps, including synthesis and treatment of polyamide acid, curtain coating, pre-drying of the film and imidization, and the preparation method comprises the following concrete steps: taking biphenyl diamine and dianhydride as polyamide acid synthesizing monomers; controlling the temperature of a curtain coating substrate to be above 30 DEG C before film formation; drying and imidizing the film by adopting a programmable temperature increment mode, wherein the highest drying temperature is 130 DEG C; the highest imidization temperature is not lower than 450 DEG C. The prepared polyimide film is flat in surface, smaller than or equal to 10nm in surface roughness, larger than 300MPa in tensile strength, larger than 330 DEG C in glass-transition temperature, smaller than 1% in thermal shrinkage rate and smaller than 20ppm / DEG C in thermal expansion coefficient (CTE). The preparation method disclosed by the invention is safe in overall technological process, free of use of expensive equipment, simple in operation procedures and easy in control on surface appearance of the film.
Owner:CHINA LUCKY FILM CORP

Nonstick pan coating layer, and production method and nonstick pan thereof

The invention provides a nonstick pan coating layer, and a production method and a nonstick pan thereof. The production method comprises the following steps: mixing organosilicone resin, modified silicon carbide, nanometer calcium carbonate, mica powder, amino resin, a dispersant and a solvent, grinding the obtained mixture, dispersing the ground mixture, and filtering the dispersed mixture to obtain a coating; and spraying the coating on the surface of a metal pan matrix, and baking the sprayed metal pan matrix at 200-300DEG C for 10-30min to obtain the nonstick pan coating layer. The organosilicone resin, saturated modified silicon carbide and the nanometer calcium carbonate are simultaneously applied to the nonstick pan coating layer in order to form the coating layer with excellent performances of above three components. The modified silicon carbide has good thermal stability, corrosion resistance and thermal conduction performance, and guarantees the thermal distribution uniformity of the coating layer; the nanometer calcium carbonate makes the microscopic surface of the organosilicone coating layer be tight and have zero porosity, protects the matrix, and enhances the nonstick effect of the coating layer, and the nanometer calcium carbonate and the modified silicon carbide have synergism, and enhance the hardness and the heat resistance of the nonstick pan coating layer.
Owner:宁波贝得厨具有限公司

High temperature resistant adhesive for automobile filter

The invention relates to a high-temperature resistant adhesive for a filter cleaner of an automobile. The adhesive comprises the following raw materials in percentage by weight: 13 to 16 percent of polyvinyl chloride (PVC) resin, 19 to 22 percent of dioctyl phthalate, 2 to 3 percent of epoxidized soybean oil, 55 to 60 percent of calcium carbonate, 0.2 to 1 percent of liquid calcium zinc heat stabilizer, 2 to 5 percent of thermosetting phenolic resin, 0.3 to 1 percent of antioxidant, 1 to 2 percent of thixotropic agent and 0 to 2 percent of white oil. In the high-temperature resistant adhesive, phenolic resin modified polyvinyl chloride is adopted, the thermosetting phenolic resin has high infiltration capacity, so the adhesive is diffused and infiltrated to the surface of a bonding material fully to promote Brownian movement to make polar groups or chain knots on two interfaces get close to each other; and when the distance between the adhesive and adherend molecules is between 5 and 10 angstroms, mutually-attractive force is formed among interface molecules, and the distance among the molecules is further shortened to the maximum stable state, so the adhesive force of the adhesive can be enhanced; and the phenolic resin has the characteristics of high heat resistance, flame retardance and the like, so that the high-temperature resistant performance of the adhesive and filter cleaner products is enhanced.
Owner:佛山市豹王滤芯制造有限公司

Composite fiber material product, preparation method thereof and application thereof

The invention discloses a composite fiber material product, a preparation method thereof and an application thereof. The composite fiber material product comprises a piece of middle fiber material cloth (1), an upper surface film (2) arranged above the fiber material cloth (1) and a lower surface film (3) arranged under the fiber material cloth (1), wherein the outer surfaces of the upper surface film (2) and the lower surface film (3) are further provided with a layer of glass fiber cloth (4). The upper surface film and the lower surface film of the composite fiber material product can be respectively and internally printed with characters or patterns, the surfaces can be respectively formed to be a mirror surface or matting, and the composite fiber material product is attractive in appearance, free of air vents and needle eyes, good in rigidity, strong in impact resistance and mar resistance, and strong in heat resistance and corrosion resistance, so that the composite fiber material product can be widely used for manufacturing shells of various electronic products, electrical equipment, aviation and spaceflight equipment, and the like. The preparation method of the composite fiber material product is low in mould requirement, can be used for preparing the composite fiber material product with a surface which has the mirror surface or is matting. The follow-up treatment to the surface of the product can be avoided, such as polishing and the like, so that the invention is convenient to operate, and high in yield and production efficiency.
Owner:宜兴市中碳科技有限公司
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