1026results about How to "Obvious cost advantage" patented technology

The invention relates to a cement-based shrinkage-free joint filling sealing mortar for doors and windows and a preparation method and a construction method thereof. The sealing mortar is prepared by the components in parts by weight as follows: 100 parts of cement, 0-80 parts of active admixture, 0.01-10 parts of water reducer, 0.01-10 parts of early strength agent, 0.01-10 parts of thickening time control agent, 0-25 parts of expanding agent, 0-30 parts of binder, 0-10 parts of air entraining agent, 0.01-30 parts of plastic retaining agent, 0.01-10 parts of moisture repellent, 0-5 parts of starch ether, 0-150 parts of powder filler and 0-300 parts of aggregate. Compared with the prior art, the mortar provided by the invention has the advantages of no shrinkage, strong binding power, no falling, good anti-permeability, simpleness in construction, efficiency and the like, and can adequately fill joints of doors and windows to ensure the sealing property around the doors and windows, and water is prevented from being seeped into the doors and windows.

The invention relates to an assembled splicing joint sealing material for building components and an application thereof. The sealing material is prepared from raw materials in parts by weight as follows: 100 parts of cement, 0-150 parts of active admixture, 0.01-10 parts of water reducer, 0.01-10 parts of early strength agent, 0-10 parts of thickening time control agent, 0.1-30 parts of expanding agent, 0-30 parts of bonder, 0.01-30 parts of plastic retaining agent, 0.01-10 parts of starch ether, 0-10 parts of thixotropic lubricant and 0-300 parts of quarts sand. The sealing material can be applied to sealing joint of concrete components spliced. Compared with the prior art, the sealing material is good in construction performance, and can be used by adding water to stir. The sealing material can be quickly constructed by a caulking gun or an electric caulking device, and the operating time is long. Newly mixed slurry has good plasticity, adhesive force and resistance to falling. The sagging phenomenon is further avoided when a vertical direction is spliced. The condensing time is adjusted according to the project demand, the early strength is high and the later strength is continuously increased.

The invention relates to a high-early-strength antifreezing polycarboxylic-acid composite water reducing agent and application thereof, belonging to the field of construction materials. The invention aims to provide a high-early-strength antifreezing polycarboxylic-acid composite water reducing agent and application thereof. The high-early-strength antifreezing polycarboxylic-acid composite water reducing agent is prepared from the following raw materials in parts by weight: 17.5-32.5 parts of polycarboxylic-acid water reducing agent, 1-3 parts of sodium lignosulfonate, 7-36 parts of early-strength admixture, 2-8 parts of antifreezing agent, 0-0.5 part of air entraining agent and 20-72.5 parts of water. The early-strength admixture is composed of 1-8 parts by weight of organic early-strength component and 6-28 parts by weight of inorganic early-strength component. The high-early-strength antifreezing polycarboxylic-acid composite water reducing agent has the advantages of high early strength, favorable anti-freeze-thawing effect and the like.

The invention relates to an engineering process for producing a low-iron low-silicon 3004 alloy by directly cast-rolling electrolytic aluminium liquid. The process comprises the procedures of alloy aluminium melting, ingredient adjusting, on-line refining for three times, standing, outgassing, grain refining, filtering, tilting cast-rolling, homogenizing, cold rolling, intermediate annealing, another cold rolling, full annealing, recoiling and packaging. The refining comprises powder spraying refining in a melting furnace and combined refining of on-line argon and carbon tetrachloride introducing. The annealing comprises high-temperature quick annealing, the intermediate annealing and the full annealing. During the cast-rolling, the temperature in a front box is 710-720 DEG C, and the cast-rolling speed is 600-900 mm / min. The product is the low-iron low-silicon 3004 alloy. The low-iron low-silicon 3004 alloy comprises 0.06-0.14 wt% of Si, 0.25-0.43 wt% of Fe, 0.012-0.14 wt% of Cu, 1.0-1.2 wt% of Mn, 0.8-1.0 wt% of Mg, at most 0.02 wt% of Zn, 0.015-0.03 wt% of Ti and the balance of Al. The invention has the characteristics of simple procedure, energy saving, emission reduction, goodalloy performance and low earring rate.

The invention relates to rebar grouting connecting element sealing materials, and a preparation method and application thereof. The materials are prepared by the following raw materials, by weight, 100 parts of cement, 0-80 parts of activity admixtures, 0.01-10 parts of water reducing agents, 0.01-10 parts of early strength agents, 0.01-30 parts of expanding agents, 0-30 parts of adhesion agents, 0.01-50 parts of plastic retaining agents, 0.01-10 parts of starch ether, 0-100 parts of powder stuffing and 10-300 parts of quartz sand. The sealing materials are prepared through stirring and blending and can be used for sealing process before rebar grouting connection. Compared with the prior art, the sealing materials are good in plasticity, adhesive power and drop smoothness resistance, slurry does not contract, and defects that cracking, water seepage, dropping off and the like are easily generated due to the fact that common cement mortar is used for sealing are overcome. The sealing materials have excellent construction performance, and can be applied to quick extrusion and jetting construction of a caulking gun or a power-driven caulking device. After the sealing materials are adopted to carry out a sealing process, rebar connecting grouting construction can be carried out after one day, and construction efficiency can be greatly improved.

The invention relates to a system and a method for measuring time-sharing quick steady-state sine sweep excitation frequency response function, which belong to the technical field of vibration tests. An excitation system adopts a vibration exciter and a power amplifier. A force sensor and a vibration sensor are adopted to measure an exciting force signal and a vibratory response signal of the system at the same time. A charge amplifier is adopted to condition and filter the signals. A data acquisition system connects a data acquisition card with a connecting terminal through a high-performance shielded cable and is connected with a general computer to acquire and send data. The generation of a sweep signal and the data processing, analysis, storage and display of an exciter response signal are achieved by adopting software based on the general computer. The system and the method achieve quick steady-state sine sweep excitation, the complete cycle sampling of the exciter response signal, and precise and reliable frequency response function curve. The test system is guided by computer programs and is finished automatically, the test method is precise and reliable, and the system and the method have important meaning on testing the dynamic properties of structural elements.

The invention discloses high-compaction-density lithium iron phosphate and a preparation method thereof. The preparation method includes that an iron phosphate material mixed with large particles and small particles is mixed with a lithium source, a lithium iron phosphate precursor with iron phosphate as a skeleton is obtained by further grinding, and the high-compaction-density lithium iron phosphate can be obtained through calcination. The maximum available compaction density of a pole piece produced from the obtained lithium iron phosphate is between 2.3g / cm<3> and 2.45g / cm<3>; a battery prepared by taking the high-compaction-density lithium iron phosphate as a cathode active material is high in specific capacity and good in cycle performance, 1C discharge is above 140mAh / g, and the cycle of the average value of cycling to less than 80% of the capacity of the first three cycles is above 3895; in addition, the preparation method is simple in process and high in operability, requirements of current industry fields on the compaction density of the cathode material can be met, and good cost advantage can be provided.

An ultrathin hot-rolled sheet strip with yield strength more than or equal to 500MPa level comprises the chemical components by weight: 0.02-007%of C, less than or equal to 0.50% of Si, 0.50-1.40% of Mn, less than or equal to 0.030% of P, less than or equal to 0.010% of S, 0.03-0.11% of Ti, 0.01-0.20% of Als, less than or equal to 0.005% of N, less than or equal to 0.004% of O, or 0.17-0.20% of C, less than or equal to 0.50% of Si, 0.50-0.90% of Mn, less than or equal to 0.030% of P, less than or equal to 0.010% of S, 0.03-0.08% of Ti, 0.01-0.20% of Als, less than or equal to 0.005% of N, less than or equal to 0.004% of O. The process comprises melted iron desulfuration, converter blowing, argon blowing, LF furnace refining, continuous casting, rotary descaling, soaking pit soaking, descaling, seven-frame finish rolling, stream cooling and coiling. The ultrathin hot-rolled sheet strip has the advantages that the addition of the alloying element is low, the mechanical property is as follows: the yield strength is more than or equal to 500MPa, the product thickness is less than or equal to 1.4mm, the sheet shape is good, the production flow is short, and excellent cold forming and welding performances are achieved.

A metal ligand is changed, and through precisely controlled carbonization and metal high temperature reduction, a metal mono-atomic nitrogen-sulfur dually-doped carbon material is obtained. An S-containing ligand is added to prevent the generation of metal carbides during the pyrolysis process; the temperature and time of pyrolysis are controlled to avoid the precipitation of a carbon layer; metalions are anchored in a carbon skeleton of graphene; exposed metal nitrides and metal sulfides on the surface can be easily removed by acids; mono-atom level dispersion of metals in a graphene structure is realized, and at the same time, more active sites are exposed. The adjusting function of S during the pyrolysis process is smartly utilized to synthesize a metal mono-atomic catalyst, all metalatoms (100%) are utilized, and the dispersion, stability, and characteristic activity of the catalyst are all improved. Furthermore, the synergistic effect is generated by co-doping of nitrogen and sulfur and the catalytic activity is further enhanced. The prepared mono-atomic catalyst has excellent hydrogen evolution / oxygen reduction catalytic activity, the operation is simple, the industrial production is easy, and the catalyst can be widely applied to fuel cells that take a proton exchange membrane as the electrolyte.

The invention relates to a USB (Universal Serial Bus) interface multiplexing interphone and a control method thereof; the interphone comprises an USB interface, an interface detection module, a control module and at least two function processing modules which are arranged on the interphone, wherein the interface detection module is used for detecting whether a signal detection pin on the USB interface of the interphone is effective and generating a pin detection signal; the control module is used for judging whether the USB interface on the interphone is connected into an exterior plug-in unit according to the pin detection signal and the type of the exterior plug-in unit when the USB interface is connected into the exterior plug-in unit; and the control module is also used for controlling the functional processing modules in the interphone corresponding to the type of the exterior plug-in unit to be communicated with the exterior plug-in unit according to the judgment result of the type of the exterior plug-in unit. The USB interface of the interphone provided by the invention can be applied to USB channel transmission equipment, plug-in modules of headsets and the like; and the multiple functional interfaces are multiplexed on the interface with very small size, thereby the volume of the interphone is reduced, and the USB (Universal Serial Bus) interface is very suitable for the small-sized portable interphone and has very obvious cost advantage.

An aluminium brazing sheet comprising an aluminium alloy core material covered by an interlayer and an Al—Si braze alloy is disclosed. The interlayer consists of an aluminium alloy comprising ≦1.0% Si and 0.1-2.5% Mg. The Al—Si braze alloy comprises 5-14% Si and 0.01-1.0% Bi. The core material and the interlayer has a higher melting temperature than the braze alloy.

The invention discloses a high-flame-retardancy polyester-fiber-reinforced PVC (polyvinyl chloride) composite material. From top to bottom, the composite material sequentially comprises a flame-retardant PVC surface film layer, a flame-retardant PVC paste surface layer, a polyester fiber mesh cloth substrate, a flame-retardant PVC paste bottom surface layer and a flame-retardant PVC bottom film layer. The high-flame-retardancy polyester-fiber-reinforced PVC composite material has the advantages of excellent flame retardancy, soft feeling and favorable bending resistance, and can not easily produce creases by repeated use and folding. Compared with the polyester fiber base cloth subjected to flame-retardant treatment, the PVC composite material disclosed by the invention has obvious cost advantage.

The invention relates to a preparation method of a pre-laid waterproof coiled material for concrete mortar bonding construction. According to the technical scheme, the preparation method comprises the following steps: fully applying an SIS hot-melt pressure-sensitive adhesive to a modified polyethylene plastic waterproof main body layer by virtue of a hot-melt pressure sensitive adhesive coating machine, so as to form an SIS hot-melt pressure-sensitive self-sticking layer, and then coating the hot-melt pressure-sensitive self-sticking layer with a weather resistant mineral grain functional layer with cement reactivity and an anti-sticking isolation membrane positioned on one side of the coiled material. The preparation method has the beneficial effects that (1) a novel wet bonding technique is provided, the coiled material and structural concrete are permanently and organically combined, no water channeling hazards exist between the coiled material and the structural concrete, and the reliability of a waterproof layer is improved; (2) the impact resistant performance and the puncture resistant performance are excellent, and the construction load which directly acts on the pre-laid waterproof coiled material and the impact of a steel skeleton can be born; (3) strong chemical resistance is provided; (4) the construction is convenient, and a leveling blanket is not needed; (5) the waterproof coiled material and a basic layer are in border adhibiting without influence of sedimentation deformation of the basic layer.

The invention discloses a flame-retardant high temperature-resistant epoxy resin composition capable of being used for pultrusion and a preparation method thereof. The flame-retardant high temperature-resistant epoxy resin composition capable of being used for pultrusion comprises three components of A, B, and C, and is characterized in that the A component comprises diglycidyl ether epoxy resin, cycloaliphatic epoxy resin and an epoxy resin active diluents; the B component comprises cycloaliphatic acid anhydride, arene poly(acid anhydride), a thermoplastic phenolic resin curing agent, a maleic anhydride-grafted rubber flexibilizer, a polysiloxane toughening modifier, and an epoxy resin curing accelerator; the C component comprises an inorganic fire retardant which has an ultrafine particle size and is subjected to surface modification by a silane coupling agent and a hydrophobic modifier; the weight ratio of the A, B, and C components is that A:B:C=100:50-250:20-150.

The invention relates to an environment-friendly waterborne hot-seal adhesive for drug bubble cap packages and application thereof. The water-borne heat-seal adhesive is produced with the following substances in the following content proportions (weight portions): waterborne resin: 10-60; assistant: 0-10; auxiliary solvent: 0-30; waterborne pigment: 0-10; deionized water: 30-80; and pH conditioner: 0-5. Compared with the prior art, the invention has the following advantages: the adhesive is environment-friendly and basically free of organic solvents, and the content of volatile organic compounds (VOCs) is extremely low, and the cost advantage is obvious; all indexes including heat-seal strength (can reach as high as 13N / 15mm), after-tack resistance, content of easily oxidized substances and the like comply with drug packing material standards (YBB00132002) of the State Drug Administration, so the waterborne heat-seal adhesive can completely replace the existing solvent-based VC hot-seal adhesives; production of the heat-seal adhesive has simple process and high production efficiency.

The invention provides a method for controlling the cooking information output of a cooking electrical system which can cook according to the menu data. The method comprises a step that a processing module is controlled to send the cooking information of a cooking electrical appliance to a mobile individual digital terminal through a communication interface module; and a step that: the mobile individual digital terminal outputs text description information, graphic schematic information and / or voice prompt information corresponding to the cooking information. The method combines the mobile individual digital terminal which has a strong processing function and network connection capability with the cooking electrical appliance into the cooking electrical system, so the content and functions of the cooking electrical appliance are respectively and continuously enriched and enhanced, meanwhile, the cooking electrical appliance has no excessive requirement on oneself display device, and accordingly, the cooking electrical appliance is prevented from restricting the oneself display device in the structre and cost aspect.

The invention provides a solar photovoltaic-commercial power hybrid driving cold and heat accumulating heat pump unit which comprises a DC compressor and an AC compressor and is a double-power heat pump that is driven by a solar photovoltaic DC power and a common commercial AC power in a combining way. When sunshine exists, a direct current generated by a solar panel is used for directly driving a DC refrigerating compressor to obtain refrigerating capacity and heat amount. The produced refrigerating capacity and the heat amount can be stored respectively by phase-transited cold accumulating and heat accumulating media. The defects of the intermittent and the climate dependence of solar energy are remedied. When the DC power is not used, the AC power from power network is used for supplying power. The adaptability of a solar air conditioning system is greatly improved, and the initial investment of the system is obviously reduced.

The invention provides a carbon / nickel-cobalt layered double hydroxide composite material which is prepared according to the following method that carbonization treatment is performed on raw material wood powder under the atmosphere of nitrogen; then the carbonized product is uniformly mixed with alkali and water, and most of the water of the mixture is heated and evaporated and then activation treatment is performed so that alkali activated charcoal powder is prepared; the alkali activated charcoal powder is added in a nitrogen doped solution, and hydrothermal reaction is performed ultrasonic uniform mixing so that nitrogen doped activated charcoal powder is prepared; the nitrogen doped activated charcoal powder is added in deionized water, and the mixed solution of nickel salt and cobalt salt is added after dispersion; an alkali solution is added after temperature rising and stirring, and heat preservation and stirring reaction is continued; and then the reaction solution is post-treated so that the finished product is obtained. Low-cost, environment-friendly, renewable and easily obtaining wood material acts as the raw material to prepare carbon material used for manufacturing of the carbon / nickel-cobalt layered double hydroxide composite material used for a supercapacitor so that the cost advantage is obvious. Besides, stability of the composite material can be enhanced by the nitrogen doped feature of the carbon material in the composite material so that capacitance output capability of the composite material can be enhanced.

Belonging to the technical field of industrial catalysts, the invention in particular relates to a composite metal salt catalyst for acetylene hydrochlorination. The catalyst takes a copper salt loaded on a carbon-based carrier as the main active component, and a synergistic metal or anionic ligand is added to enhance the catalytic activity and stability of the catalyst. In the catalyst, the mass fraction of the copper salt is 1-10%, and the mass fraction of the synergistic metal is 0.5-11.0%. On the basis of maintaining the activity, the prepared catalyst has greatly improved stability, and realizes the purpose of maintaining excellent catalyst performance under the premise of reducing the cetylene hydrochlorination catalyst cost.

The invention provides a method of preparing electrode material for a carbon-based supercapacitor by taking bamboo powder as raw material. The method includes the following steps: under the protection of nitrogen, evenly mixing a carbonized product with alkali and water after bamboo powder as raw material undergoes two-stage carbonization, heating the above mixture to enable the water content of the mixture to be 10%-30% of that of the original mixture, conducting two-stage activation, cleaning and drying the mixture to obtain alkali activated bamboo powdered carbon, adding the alkali activated bamboo powdered carbon into a phosphor and nitrogen doped solution, conducting ultrasonic uniform mixing, then conducting a hydro-thermal reaction, and finally obtaining a finished product after post-treatment is conducted on a reaction solution. Cheap, environment-friendly and renewable bamboo that is easily available is taken as raw material to prepare carbon material for a supercapacitor, so the method has the noticeable cost advantage. Through two-stage carbonization and two-stage activation, impurities in bamboo material can be fully removed, and porous carbon material with high carbon content can be formed. Moreover, a phosphor, nitrogen and hetero atom codope process is introduced to enable bamboo carbon to have extra fake capacitance, so the capacitive performance of the supercapacitor can be greatly improved.

The present invention discloses a flat-belt driven disc separator, comprising a power part, a driving part, a lubrication system, a working part, a machine part and a control and assisting part. In addition to that the requirements of the function and performance of the separator is satisfied, the driving system is largely simplified, the driving path is brief, the quantity of driving components is largely reduced and the technical requirement of processing is lowered; regular replacement of expensive copper gear wheel, friction drum and other wearing parts is avoided, and as a result, the structure of the complete machine is simplified, the cost of production and use is reduced, the failure rate of the machine is lowered, and the technical performance of the complete machine is improved. The invention can be directly applied to condensing separation of natural rubber, and the invention can also be applied to separating other emulsions; the rotary-drum structure of the invention can overcome the disadvantages of the prior art; the continuous operation time is prolonged and the rotary-drum heating is alleviated; the strength, safety, reliability and maintenance technique are improved. The driving part and the lower machine body can form the driving of a manual slag-discharge separator, a gushing slag-discharge separator and a ring-valve slag-discharge separator and the lower machine body.

The invention provides a multi-screen display method, device, equipment and system, a cabin and a storage medium. The method comprises steps of connecting with one or more display screens respectively; maintaining a window queue for each connected display screen; putting the application program windows needing to be displayed in one or more display screens into corresponding window queues; and displaying an interface corresponding to the application program window in the window queue on a corresponding display screen. Therefore, the display of a plurality of display screens can be realized onthe basis of one control center, so that a multi-screen display system of one electronic equipment + a plurality of display screens can be constructed on the aspect of specific implementation, and thecost advantage is obvious.

The invention provides an iron-based low-temperature SCR denitration catalyst and a preparation method thereof. Iron and cerium compounds are taken as active components, or iron, manganese and cerium compounds are taken as active components, titanium oxide is taken as a carrier, the molar ratio of iron, manganese and cerium is 1:(0.5-4):(0.5-1.5), and the molar ratio of iron and titanium oxide is 0.15-0.25. The preparation method comprises the steps of dissolving iron nitrate, manganese nitrate and cerium nitrate in deionized water, adding the titanium oxide, stirring intensely so as to mix the above compounds thoroughly, then performing ultrasonic mixing, putting the mixture into an oven for drying, calcining in an air atmosphere, and then grinding the mixture into powder. The iron-based low-temperature SCR denitration catalyst provided by the invention has an obvious advantage in cost, and meanwhile, the iron-based low-temperature SCR denitration catalyst has higher denitration efficiency under a medium and low temperature.

The invention relates to a flow enlarging valve so as to overcome the defects that an existing flow enlarging valve is large in energy loss, poor in controllability and large in hydraulic impact. The flow enlarging valve is provided with an oil port P, an oil port T, an oil port A, an oil port B, an oil port L and an oil port R, wherein the oil port P and the oil port T are connected with an oil inlet and an oil return opening of a reversing valve, the oil port A and the oil port B are correspondingly connected with working oil ports of the reversing valve, and the oil port L and the oil port R are connected with the left hydraulic control end and the right hydraulic control end of the reversing valve. When the reversing valve is in a left position, the oil port L, the oil port P, the oil port A and an oil port LS are communicated with one another, and the oil port B is communicated with the oil port T. When the reversing valve is in a right position, the oil port R, the oil port P, the oil port B and the oil port LS are communicated with one another, and the oil port A is communicated with the oil port T. When the reversing valve is in a middle position, the oil port LS is communicated with the oil port T. According to the flow enlarging valve, high-pressure oil is guided to be converged to the oil port A or the oil port B first to act on a hydraulic oil cylinder, the oil port LS is used as the signal input of a load-sensitive variable pump, and the problems of being large in hydraulic energy loss, poor in controllability and large in hydraulic impact caused in the steering process of a loading machine can be solved through the principle.

The invention relates to a preparation method for a self-adhesive modified asphalt waterproof coiled material with cement reactivity. According to the technical scheme, the method comprises the following steps of coating on one or two sides of a base reinforcement layer with modified asphalt pressure sensitive self-adhesive glue with cement reactivity to form (a) modified asphalt pressure sensitive self-adhesive glue layer(s) by using an oil coating roller pair, and wrapping the modified asphalt pressure sensitive self-adhesive glue layer(s) with (an) anti-sticking separation film(s) to prepare a self-adhesive modified asphalt waterproof coiled material product with cement reactivity. The method has the beneficial effects that the modified asphalt pressure sensitive self-adhesive glue is used, so that the coiled material is endowed with a cement mortar adhesion characteristic, and has a thermal creep characteristic, the problem that an adhered surface is polluted by dust and the like on a construction site is effectively solved, and the range of construction application temperature of the coiled material is widened; the modified asphalt pressure sensitive self-adhesive glue is permanently and organically combined with concrete of a structural layer, and the hidden danger of water mixing is avoided; the reliability of a waterproof layer is improved, and unique self-healing capability for slight construction damage is achieved.

The invention provides a novel white light luminescence device. The device comprises an excitation light source and a fluorescent layer configured to the upstream of the excitation light source. The fluorescent layer comprises a fluorescent powder group and a transparent material. The fluorescent powder group comprises a first fluorescent powder which is excited by the excitation light source to emit white light or visible light, and a second fluorescent powder which is simultaneously excited by the excitation light source to emit infrared light. In the invention, a white light color with highphotosynthetic efficiency can be provided, simultaneously, a high-efficient infrared wave band can be provided, and a new application characteristic is provided for an LED illumination light source.

The invention discloses a parallel analog-to-digital conversion device and a method for controlling deflection of analog-to-digital conversion channels. The conversion device comprises a clock device and a comprehensive detection processor, wherein the clock device outputs clock signals processed by phase adjustment to a sampling holder, so that the clock signals are sampled by a sampling holder and are subject to analog-to-digital conversion by an analog-to-digital converter; and the comprehensive detection processor detects to acquire the deflection amount of each analog-to-digital conversion channel according to the digital signals converted by the analog-to-digital converter, feeds the clock signals, which are obtained by carrying out corresponding phase adjustment on the clock signals output by the clock devices according to the deflection amounts, to the clock device. The invention has obvious cost advantage; the control method is flexible and simple, and can not be easily influenced by the external environment; and the sampling clocks can be locked on any required phases.

The invention discloses a preparation method of 2-chloro-5-tirfluoromethylpyridine. The invention provides a preparation method of 2-chloro-5-tirfluoromethylpyridine, and the preparation method comprises the following steps of: reacting 2-chloro-5-trichloromethylpyridine with hydrogen fluoride in a closed system in the presence of a catalyst to obtain the 2-chloro-5-tirfluoromethylpyridine, wherein the catalyst is antimony trioxide and / or antimony pentoxide. The invention further provides a preparation method of a compound 2, and the preparation method comprises the following steps of: reacting a compound 3 with ammonia in the presence of alkali to obtain the compound 2. The preparation method provided by the invention is cheap and liable to obtain raw materials, low in cost, few in reaction by-products, simple in post treatment, safe to operate, environment-friendly and suitable for large-scale industrial production.

The invention belongs to the technical field of rubber seal and discloses a heat-resistant and oil-resistant butadiene-acrylonitrile rubber material as well as a preparation method and application thereof. The butadiene-acrylonitrile rubber material comprises the following components in parts by mass: 100 parts of butadiene-acrylonitrile rubber,3-5 parts of zinc oxide, 3-5 parts of light magnesium oxide, 0.3-0.6 part of stearic acid, 35-50 parts of carbon black, 2-3 parts of a reactive antioxidant, 2-3 parts of 2-mercapto benzimidazole zinc salt, 1.5-2.3 parts of peroxide, 0.8-3 parts of N,N'-m-phenylene dimaleimide and 0.1-0.2 part of 4-hydroxy-2,2,6,6-tetramethylpiperidine-1-oxygen radical. After the rubber material is subjected to hot-air ageing at 120 DEG C for 70 hours, the permanent compression deformation rate (a type B sample) is not more than 18% and the break elongation rate and the retention rate are more than 90%. The rubber material is especially suitable for manufacturing oil-resistant static seal parts capable of being used at 100-120 DEG C for a long term, and can endow seal products with excellent durability.

The invention provides an electric cooker capable of cooking according to menu data. The electric cooker comprises a cooking execution module, a communication interface module, and a control processing module connected with the cooking execution module and the communication interface module. The control processing module sends cooking information of the electric cooker to a mobile personal digital terminal through the communication interface module, to enable the terminal to output text description information, graphic schematic information and / or sound prompt information corresponding to the cooking information. By utilizing strong digital processing platform and various functions of existing mobile personal digital terminal, the electric cooker provided by the invention has the advantages of simplified electric cooker structure, sufficient display information, human-machine interface with simple operation, and low cost.