252results about How to "Prevent restore" patented technology

The invention discloses a catalyst, which is carried by an AlSn-SBA-15 molecular sieve with SnAl double metal-containing framework, for dehydrogenation of propane for preparing propylene. In the catalyst, the AlSn-SBA-15 molecular sieve with SnAl double metal-containing framework is used as a carrier, platinum-group element metal is used as a main catalyst, IVA-group, IA-group or IIA-group element metal is used as an auxiliary agent, and high-temperature-resistant inorganic oxide is used for forming an adhesive. A multi-step dipping method is used in the preparation of the catalyst, namely the alkaline metal auxiliary agent is dipped, so that the acidity and alkalinity of the catalyst and the types of cations in pores of the molecular sieve are effectively modulated by cation exchange technology, and the platinum-group element metal is dipped. The catalyst has superior anti-carbon deposit performance, high propane conversion rate under the reaction conditions of high temperature and low pressure, propylene selectivity and reaction stability.

The invention discloses a novel method for preparing load nano zero valent iron. The iron source is iron-containing compounds of Fe<2+> and Fe<3+>, such as ferric oleate, ferric hydroxide oxide, ferric chloride, ferric nitrate and the like; and the loads are carbon black, active carbon, kieselguhr, zeolite and other load materials. The method is characterized in that: the iron-containing compounds on the loads are reduced into nano zero valent iron under the atmosphere condition and under the reduction action of reducing agents, such as H2, CO, and reduction carbon (such as coke, reduction coal and the like). The preparation method is environment-friendly, and simple and is low in cost; the expensive reducing agents (such as NaBH4 and the like) are avoided, and organic pollutants (such as halogenated hydrocarbon, pesticide, polychlorinated biphenyls (PCBs) and polycyclic aromatic hydrocarbons (PAHs), inorganic negative ions (such as NO<3->), and heavy metal (such as Cr<6+>, As<3+>, As<5+>, Cu<2+>, Pb<2+>) and the like can be efficiently removed effectively.

The invention discloses a preparation method of a nickel-graphene complex phase, which comprises the following steps: cleaning a base plate with an alkali solution, and activating with hydrochloric acid; 2) preparing nickel sulfate, nickelous chloride, boric acid and a surfactant into a nickel plating solution; 3) adding graphene nanosheets into the nickel plating solution to obtain an electroplating solution containing graphene nanosheets; and 4) electroplating in the electroplating solution by using a nickel sheet as an anode and the base plate as a cathode to obtain the nickel-graphene complex phase. The graphene and nickel are directly compounded, thereby avoiding the GO (graphene oxide) reduction process in the traditional method. The method has the advantages of simple technique, favorable controllability and wide application range; and the prepared nickel-graphene complex phase has favorable mechanical properties and corrosion resistance.

For overcoming the problem of degradation of lithium battery performance caused by high probability of oxidization of an electrolyte of a high voltage lithium battery in the prior art, the invention provides a high voltage lithium battery cell. The high voltage lithium battery cell comprises a positive electrode, a negative electrode and an electrolyte positioned between the positive electrode and the negative electrode; the electrolyte comprises an inorganic electrolyte layer and a polymer electrolyte layer positioned on the surface of the inorganic electrolyte layer; the inorganic electrolyte layer is positioned on the surface of the positive electrode; and the polymer electrolyte layer is positioned on the surface of the negative electrode. Meanwhile, the invention also discloses a preparation method for the high voltage lithium battery cell and a lithium ion battery adopting the high voltage lithium battery cell. The high voltage lithium battery cell provided by the invention can overcome a large amount of negative problems caused by oxidization of the electrolyte, and the safety performance and the cycling performance of the lithium battery can be improved.

The invention discloses an in-situ presulfurization method of a hydrogenation catalyst. The method comprises the following steps: in the wetting stage of the catalyst, introducing sulfurized oil and hydrogen gas from the bottom of a reactor; when the reactor is full of the sulfurized oil, introducing the sulfurized oil and the hydrogen gas from the top of the reactor for closed cycle; and fillinga vulcanizing agent into the sulfurized oil gradually to complete sulfurization. In the method provided by the invention, the mode of introducing the sulfurized oil from the bottom of the reactor into the reactor is adopted for the wetting process of the catalyst, thus the wetting of the catalyst is more sufficient and complete, and the dry area in a catalyst bed can be effectively prevented; andmeanwhile, as the catalyst is fully wetted, the condition that the catalyst in the oxidation state is reduced by hydrogen gas thus the sulfurization is difficult to perform can be effectively avoided. The sulfurization method provided by the invention is simple in process and is convenient to operate, and the sulfurization effect is better than that of the conventional method, thereby being favorable for improving the activity of the catalyst.

A preparation method of a high-electric-conductivity graphene/natural rubber nano-composite is applicable to the field of strain-sensitive sensors, solvent-sensitive sensors and other sensors. The preparation method includes: first, preparing graphene oxide/natural rubber nano-composite by means of solution film-spreading, and reducing in situ graphene oxide in the composite at room temperature by using hydrogen iodate; the prepared graphene/natural rubber composite has three-dimensionally continuous graphene conductive grid structure and has very low conductivity threshold and excellent conductivity. The problem that the graphene oxide easily aggregate during reduction and graphene is difficult to disperse in a rubber matrix, and a preparation technology is greatly simplified.

The invention discloses a preparation method of a copper-graphene complex phase. The preparation method comprises the following steps of: (1) removing oxides from the surface of a base plate by using hydrochloric acid; (2) preparing copper sulfate, sulfuric acid, the hydrochloric acid and a surfactant into a copper plating solution; (3) adding a graphene nanosheet to the copper plating solution to obtain a plating solution which contains the graphene nanosheet; and (4) placing a phosphorus copper sheet serving as an anode and the base plate serving as a cathode into the plating solution for plating to obtain the copper-graphene complex phase. The preparation method disclosed by the invention prevents the GO reduction process of the traditional method by directly compounding graphene and copper and therefore has the advantages of simple process, good controllability and wide application range; the prepared copper-graphene complex phase has good electrical property, antioxidation property, mechanical property and anti-corrosive property.

The invention relates to a silicon-containing lithium ion battery with high energy density. The lithium ion battery comprises a positive electrode, a silicon-containing negative electrode, a fluorine-containing electrolyte, a diaphragm, electrode lugs and a packaging material. The silicon-containing negative electrode takes a silicon-based material as a whole or a part of electrochemical active substances. The electrolyte contains lithium salt, a non-aqueous organic solvent capable of dissolving the lithium salt, an SEI film-forming additive and hydrofluoroether. The solubility of the lithiumsalt in the non-aqueous organic solvent capable of dissolving the lithium salt is higher than 2 mol/L. The solubility of the lithium salt in the hydrofluoroether is lower than 0.3 mol/L, wherein the non-aqueous organic solvent capable of dissolving the lithium salt is mutually dissolved with the hydrofluoroether, the non-aqueous organic solvent capable of dissolving the lithium salt and the liquidSEI film-forming additive are mutually dissolved, so the solid SEI film-forming additive can be dissolved. The silicon-containing lithium ion battery has the advantages of high energy density, long cycle life, good rate capability, high safety performance, difficulty in expansion and deformation and the like.

The invention provides high-voltage electrolyte for a lithium ion battery. The high-voltage electrolyte is composed of an electrolyte lithium salt, fluorocarbonate, nitriles, a solvent and an additive, wherein the electrolyte lithium salt is LiPF6 with the concentration of 1.2mol/L-1.6mol/L; a fluorocarbonate solvent accounts for 10%-60% of the total mass of the solvent; the nitriles account for 5%-15% of the total mass of the solvent; a non-aqueous organic solvent accounts for 23%-84.5% of the total mass of the solvent; the additive is lithium difluorophosphate and accounts for 0.5%-2% of the total mass of the solvent. By compounding and combining cyclic fluorocarbonate, straight-chain fluorocarbonate, the nitriles, the additive and the like, the high-voltage heat stability of the electrolyte is prone to improve and the problems that the high-temperature circulating stability of conventional electrolyte is poor and the high-temperature storage is not ideal are improved. Meanwhile, the electrolyte has small viscosity when the materials are matched; the wetting property of an electrode material is facilitated, the liquid injection time of the lithium ion battery is shortened and the rate performance of the battery is improved.

The invention discloses a method for on-scale continuous production of a three-dimensional graphene membrane and application, belonging to the field of functional materials. The method comprises the following steps: 1, preparing a graphene oxide solution; 2, stirring and concentrating; 3, soaking a polytetrafluoroethylene bath into methanol; 4, filling the concentrated graphene oxide solution into the polytetrafluoroethylene bath, thereby obtaining graphene oxide strips; 5, leading out the graphene oxide strips from the methanol solution, firstly drying, and further performing reduction expansion, thereby obtaining the three-dimensional graphene membrane; and 6, collecting the three-dimensional graphene membrane, and coiling. The graphene oxide solution and functional nanoparticles are mixed, and the functional three-dimensional graphene membrane can be prepared by performing the above preparation steps. The method is simple in preparation process, environment-friendly, low in cost and applicable to on-scale production, and the three-dimensional graphene membrane prepared by using the method is three-dimensional and porous and has the characteristics of light mass, large specific surface area and good flexibility.

The invention discloses a method for preparing a new lead-acid battery from active substances of a waste and old lead-acid battery. The method comprises the following steps of dismounting the waste and old lead-acid battery to obtain a positive electrode plate and a negative electrode plate; respectively processing the positive electrode plate and the negative electrode plate to obtain positive electrode powder and negative electrode powder; respectively performing desulfurization and calcination on the obtained positive electrode powder and the negative electrode powder to obtain new positive electrode powder and new negative electrode powder with high electrochemical performance; using the obtained new positive electrode powder and the new negative electrode powder for manufacturing the new lead-acid battery. The prepared new positive electrode powder and the prepared new negative powder can be directly used for manufacturing the new lead acid battery; the method is simple; the implementation is easy. The method has the advantages that the reduction process in the traditional waste and old lead-acid battery positive powder processing process is avoided; the electrochemical performance of the positive electrode powder can be obviously improved; the formation process of the lead acid battery is accelerated; the preparation process conforms to clean production requirements; the battery production period is shortened; the production cost is reduced.

A preparation of zeolite-carried high-molecular metal cluster features that an alcohol-water solution containing Pt family metal inorganic compound and an alcohol-water solution of polymer are made to contact with superfine Beta zeolite molecular sieve fully and the Pt family metal is reduced through heating reflux. Then, powdered superfine Beta zeolite molecular sieve carrying high-molecular Pt family metal cluster is produced by drying in rotary decompress evaporation mode. The said process can disperse the metal cluster homogeneously on the surface of molecular sieve, and the metal particles have small and narrowly distributed size and are stable in the air. The metal cluster may be used in catalyst for the low temperature conversion of methane and has relatively high selectivity to high-carbon hydrocarbon.

The invention discloses an eavesdropping-proof recording method and an interference shielding device. The eavesdropping-proof recording method comprises steps: pre-acquired speech samples of a field person are encrypted, the encrypted speech samples are mixed, and mixed speech is obtained; and the voiceprint of the mixed speech is amplified to form interference speech and the interference speech is outputted. When the generated interference speech is played, although the decibel is not high, the interference speech can be acquired easily by various types of pickups (the type of the pickup is not restricted), interference to the field person is prevented, and interference shielding can be extremely effectively carried out on an eavesdropping-proof recording device.

The invention discloses an iron ore tunnel kiln magnetizing roasting layering material distributing reduction method. Iron ore is divided into different granularity degrees according to the granularity range; the reduction coal is flatly laid in the bottom of a tunnel kiln car according to the proportion that the reduction coal accounts for 4-6% of the total weight of iron ore; the iron ore of various granularity degrees is laid at the upper portion of the reduction coal of the tunnel kiln car, and the granularity range of each layer of iron ore is gradually increased from the bottom layer to the top layer in a layer-by-layer manner; facing materials are flatly laid at the upper portion of iron ore of various granularity degrees of the tunnel kiln car; the tunnel kiln car loaded with materials is pushed into a tunnel kiln for magnetizing roasting; and after magnetizing roasting is finished, the tunnel kiln car loaded with the materials is pushed out of the tunnel kiln. According to the method, over reduction of iron ore can be effectively prevented, the control means of iron ore magnetizing roasting is improved, and the surplus carbon recycling and utilizing cost is low. In addition, the mixing technology of iron ore and a reducing agent before magnetizing roasting of the iron ore tunnel kiln is reduced or eliminated, and the production cost of the roasted ore is reduced.

The invention relates to the technical field of solid electrolytes, and in particular, relates to a highly conductive solid electrolyte prepared by a coprecipitation method, wherein a preparation method comprises the steps: step 1, weighing a dopant, aluminum nitrate, tetrabutyl titanate and ammonium dihydrogen phosphate, sequentially putting the raw materials into a reaction container, and continuously stirring at room temperature until faint yellow slurry is formed; step 2, slowly adding ammonia water into the faint yellow slurry and dissolving; step 3, heating the reaction container to 88-90 DEG C, and carrying out constant-temperature water bath magnetic stirring for 0.8-1.1 h, to form a white precipitate; step 4, transferring the white precipitate into a blast drying oven, and heatingto obtain a white precursor; step 5, presintering the white precursor to obtain white powder; and step 6, carrying out ball milling on the white powder, tabletting, molding and calcining to obtain asolid electrolyte sintered body. The solid electrolyte provided by the invention has an NASICON structure, small interface resistance and excellent electrochemical stability, and the particle size reaches nanoscale.

The invention discloses an additional nano enhancer capable of improving the mechanical property of steel and a preparation and using method thereof, and belongs to the field of ferrous metallurgy. The additional nano enhancer contains nano oxide particles and Fe, and the nano oxide particles refer to one of Y2O3, ZrO2, Ti2O3 or Ce2O3. The preparation method includes the steps of ball-milling coating, dehydration and crystallization, carbon-containing pelletizing and roasting membrane coating. The using method includes the steps that the additional nano enhancer is preheated and pre-laid at the bottom of a mold, and molten steel is injected into the mold. By the adoption of the method, Fe(OH)3 is used for pre-dispersing the nano oxide particles, OH-action is effectively destroyed and removed, the Fe(OH)3 can be gradually turned into Fe in the preparing process, and accordingly the additional nano enhancer can be prepared. In the casting process, the additional nano enhancer cannot influence the degree of purity of the molten steel, the nano oxide particles cannot denature and grow, either, a disperse distribution phase is formed when the nano oxide particles are added into the molten steel, and thus the mechanical property of the steel is effectively improved.

The invention relates to a preparation method of NiO/carbon nanospheres with core-shell structures. The preparation method comprises the steps of weighing aqueous ammonia, water, anhydrous ethyl alcohol, nickel(II) nitrate hexahydrate, tetraethyl orthosilioate, a formaldehyde solution, resorcinol and cetyl trimethyl ammonium bromide according to a mass part ratio of: 0.3-1.2:100:31.6:0.05-0.25:4.7:1.4:1:1, evenly mixing the aqueous ammonia, the water and the anhydrous ethyl alcohol and then adding the nickel(II) nitrate hexahydrate therein, stirring the mixture for 10 to 120 minutes, adding the resorcinol and the cetyl trimethyl ammonium bromide into the mixture in sequence, stirring the mixture for 30 min and then adding the formaldehyde solution and the tetraethyl orthosilioate into the mixture, stirring the mixture for 24 h and then subjecting the mixture to hydrothermal reaction for 24 h at the temperature of 100 DEG C, placing the reaction product in a tube furnace, increasing the temperature from room temperature to 700-900 DEG C at a rate of 1-10 DEG C/min in a nitrogen atmosphere for carbonization, removing SiO2 in the product by using a NaOH solution with the concentration of 3 mol/L to obtain the NiO/carbon nanospheres with the core-shell structures. The preparation method has the advantages of simple process and simple operation, and the prepared NiO/carbon nanospheres exhibit high specific capacitance and good cycling stability when serving as an electrode material of a supercapacitor.

The invention relates to a preparation method of a molybdenum trioxide/polyaniline layer-shaped composite material and the method is that: an aniline monomer intercalation molybdenum trioxide composition is synthesized in a waterless acetic acid firstly, and then the molybdenum trioxide/polyaniline layer-shaped composite material can be obtained by triggering the aniline monomer polymerization at 150DEG C. The prepared molybdenum trioxide/polyaniline layer-shaped composite material has regular ordered layered structure, the even layer interval is 1.127nm, and the heat stability is high. The prepared molybdenum trioxide/polyaniline layer-shaped composite material is characterized in that the modified MoO3 of lauryl amine is used as an intermediate, and molybdenum need not to be reduced during the intercalation process; the waterless acetic acid is used as a solvent when the monomer is intercalated, and the whole reaction is carried out in a non-water system; air is used as an initiator during the polymerization stage, and no other impurity ions are introduced, therefore, the products prepared by the preparation method are high in purity, thus improving the product quality.

The invention relates to a composite titanium removing agent and a smelting method for reducing the titanium content of molten steel. The composite titanium removing agent comprises, by mass, 30%-40%of FeO2, 40%-50% of CeO2 and 10%-30% of CaF2, wherein the particle size D50 of all the components is smaller than or equal to 50 mm. During molten iron pretreatment desulfurization, the composite titanium removing agent is added into molten iron, double slag smelting is adopted during converter smelting, active lime, soft burnt lime and iron ore are added in the early stage of smelting, and activelime and iron ore are added during latter semisteel smelting; and before converter tapping, CeO2 is added to the bottom of a molten steel refining ladle, and after the molten steel enters a tundish,CeO2 is added during each time of casting. The titanium content in the molten steel can be controlled in the whole smelting process, and the target that the mass fraction of titanium in finished steelis lower than 0.001% is achieved.

The invention discloses a blockchain data processing method and device, electronic equipment and a medium, and relates to a blockchain technology. The method is executed by a transaction processing node in a trusted blockchain network, and specifically comprises the following steps: receiving a ciphertext of a transaction processing request from an initiator; wherein the ciphertext of the transaction processing request is obtained by encrypting the transaction processing request by adopting a first blockchain key; decrypting the ciphertext of the transaction processing request by adopting a second blockchain key of a local key storage area; and processing the decryption result to obtain result data. According to the embodiment of the invention, the centralization of decryption in the dataaccess process can be reduced, and meanwhile, the data security is improved.