523results about How to "Method environmentally friendly" patented technology

The invention discloses a method for recovering and preparing lithium iron phosphate from waste lithium iron phosphate batteries. The method comprises: 1) dismantling the recovered waste lithium iron phosphate batteries, stripping battery cases, immersing the batteries, separating the electrode plates from the powder material of positive and negative terminals through a method of alternation of ultrasonic and mechanical stirring, taking out the electrode plates and diaphragms, and obtaining mixed liquor; 2) performing a preliminary ball milling to the mixed liquor, and drying the uniformly mixed slurry obtained by the preliminary ball milling; 3) calcining the dried material in oxidizing atmosphere to obtain a recovered material, adding iron source, phosphorous source and optionally new lithium iron phosphate, then adding carbon source, high energy ball milling the obtained material, drying the material to obtain a pre-burning material of the recovered material; 4) microwave sintering or solid state sintering the pre-burning material of the recovered material in protective atmosphere to obtain the product of lithium iron phosphate. The preparation method has the advantages of environmental protection, no pollution, simpleness and practicality, high production utilization rate, simple

The invention discloses a doped and surface coating co-modified anode material for a lithium ion battery and a preparation method thereof. The anode material uses doped lithium cobalt oxide as a matrix, the surface of which is coated with Co3(PO4)2, AlPO4, Mn3(PO4)2, FePO4, Ni3(PO4)2, Mg3(PO4)2 and other phosphates, therefore, the electric conductivity, the circulating performance, the high temperature and high pressure resistance and other performances are improved. The preparation method has the advantages that the coating material is uniformly coated on the surface of the anode material to be beneficial to improving the electrochemical performance; the method is simple to operate, is green and environment-friendly and has industrial applicability.

The invention discloses a single-layer graphene capable of dispersing stably and a preparation method thereof, belonging to the field of nanometer graphite conductive materials. The single-layer graphene capable of dispersing stably in water or in an organic solvent is prepared through reduction of single-layer graphene oxide by phenolic aminated compounds. According to the method, the single-layer grapheme is prepared by employing a phenolic aminated green environment-friendly reducing agent, using graphite as a raw material and carrying out the three steps of oxidation, peeling and reduction. The method enables extreme toxicity of hydrazine reducing agents to be avoided, is green and environment-friendly and is applicable to mass production. The single-layer graphene prepared in the invention has the characteristics of stable dispersion in a water phase and/or an organic phase without addition of any stabilizing agents and good conductivity, and can be used in the fields of battery materials, energy storage materials, electronic devices, current-conducting and heat-conducting polymer composite materials, etc.

The invention discloses a composite material of sub-group metals compounded with MXenes and a preparation method of the composite material. The composite material of sub-group metals compounded with MXenes is prepared from MXenes materials and sub-group metals, wherein the surfaces of the MXenes materials are coated with the sub-group metals in situ, and the sub-group metals are also distributed among layers of the MXenes materials. The preparation method comprises the following steps: grinding precursor Mn+1AXn-phase materials, sub-group metal salts and inorganic salts for 5-60min by adoptinga molten salt method, enabling the obtained mixture to react for 1-48h at 300-800 DEG C in inert atmosphere, and then, performing post-treatment to obtain the composite material of the sub-group metals compounded with the MXenes. The composite material disclosed by the invention has the advantages of adjustable and uniform components, low cost, environmental protection, high efficiency and the like, and has application prospects in the fields of electrode materials for electrochemical energy storage, wave absorption materials, electromagnetic shielding materials, catalysts and the like.

The invention relates to a preparation method of a biological ceramic coating rich in calcium and phosphate phases on the surface of magnesium alloy, comprising the following steps of: adding (C6H5O7)2Ca3.4H2O and Na3PO4 to deionized water, and simultaneously adding KOH, NH4HF2, N(CH2CH2OH)3, C3H8O3 and H2O2 to prepare an electrolyte with a certain concentration ratio of calcium and phosphate; disposing the magnesium alloy in the electrolyte as an anode which is prepared through micro arc oxidation energization reaction. The calcium-phosphate ceramic coating obtained by the preparation methodconsists of three layers of a loose layer, a transition layer and a compact layer, wherein the surface of the loose layer consists of a plurality of uniformly distributed micropores, the transition layer is between the loose layer and the compact layer, and the compact layer and a substrate body form good metallurgical bonding; therefore, the coating has high rigidity, high density, high bonding force and good corrosion resistance and abrasion resistance; simultaneously, the mouse acute systemic toxicity test indicates that the coating has good biocompatibility, and the simulated body fluid soaking test indicates that the coating has good biological activity.

The invention discloses a method for preparing metal magnesium by using dolomite as a raw material, and aims to solve the problems of low reducing efficiency, high energy consumption, long production period and serious pollution existing in the conventional method for preparing the metal magnesium. The method comprises the steps: crushing of dolomites, vacuum low-temperature light calcining and recycling of carbon dioxide, cooling and heat recovery, ball-milling of mixed materials, briquetting of mixed materials, vacuum high-temperature hot reduction, separation of magnesium blocks, and utilization of slag, wherein in the vacuum low-temperature light calcining, the crushed dolomites undergo light calcining in a continuous type vacuum calcining furnace for 1 to 3 hours at the calcining temperature of between 500 and 1,000 DEG C and under the furnace pressure of 10,000 to 60,000Pa, MgCO3 and CaCO3 in the dolomites are decomposed in sequence, the reaction expression is: CaMg(CO3)2=CaCO3+MgO+CO2(gas) and CaCO3=CaO+CO2(gas), and the mixture of carbon dioxide and magnesium oxide and calcium oxide is obtained; and the carbon dioxide which flows in the furnace and heats the dolomites is recycled.

The invention relates to an electrochemical preparation method of a graphene/nickel-aluminum bimetal hydroxide composite material for a super capacitor, belonging to the technical field of capacitor preparation. The method comprises the following steps of: putting graphite oxide in a beaker; adding deionized water and supporting electrolyte; performing ultrasonic oscillation and constant-potential electrolysis; taking out the electrode; washing the electrode with the deionized water and drying; putting the obtained graphene-modified electrode into a solution containing the precursor of nickel salt and aluminum salt; adding the supporting electrolyte; performing constant-potential electrolysis for 10 seconds; taking out the electrode; and washing the electrode with the deionized water and drying. In the invention, the electrolysis is performed under controlled potential to electrically and alternately deposit the graphene and bimetal hydroxide on the surface of the electrode, therefore, the reduction and deposition of the graphene oxide are finished at the same time, and more importantly, the accurate control on the layer thickness of graphene as well as the size and distribution density of bimetal hydroxide particles is realized; and moreover, the preparation of the material does not produce the 'three wastes' (waste gas, waste water and waste residues).

The invention relates to a closed circulating and recycling method of a waste lead-acid accumulator, and is used for solving the problem of low recovery efficiency, severe pollution and the like in the existing recycling aspect of the waste lead-acid accumulator due to lagging processing equipment, technical process production scale and the like. The method comprises the steps of: separating materials in the waste accumulator by crushing, oscillating screen sorting, magnetic separation, hydraulic sorting, vortex sorting and other methods, then carrying out desulfurization and pressure filtration treatment on obtained lead mud, then sequentially conveying obtained dried desulfurized lead mud and lead grid to a convertor and a refining kettle for smelting and refining, finally processing the refined molten lead into lead powder, lead grid or lead ingot, and storing for later use or selling as a finished product. The method has the advantages that the mechanical automation degree is high, pollution-free measures are adopted, the materials are thoroughly separated, the recovery rates of the materials are greatly improved, the total recovery rate of lead achieves 98%, the recovery rateof plastic achieves 95%, and the comprehensive utilization rate of resources achieves 98%.

The present invention provides a method for preparation of desulfurization denitrification molded activated coke by gasification slag separation carbon, and belongs to the field of comprehensive utilization of solid waste in coal chemical industry. The method comprises the following steps that gasification slag with a carbon content of larger than 80% is obtained by conducting carbon ash separating on gasification slag; The gasification slag, caking coal and long flame coal are grinded and then sifted separately until the particle size is less than 0.074 mm. Then the sifted gasification slag,caking coal and long flame coal are mixed and stirred evenly, a binder and water are added, kneading is carried out until the material is uniform, and after molding and drying, a carbonization precursor is obtained. The carbonization precursor is carbonized under the protection of an inert gas atmosphere. The carbonized material is activated with an activator under the protection of an inert gas atmosphere to obtain the desulfurization denitrification molded activated coke. The method is simple, friendly to environment and low in cost and can be used to turn gasification slag into valuables from waste on a large scale. The compressive strength, abrasion resistance and desulfurization and denitrification performance of the obtained activated coke reach GB/T30201-2013 requirements.

The invention relates to a solid sampling-non-dispersion atomic fluorescence photometer collocating device and an analyzing method. The device comprises a solid sampler, an integrated interface, a sample pipe, a peristaltic pump, a tee joint, a gas-liquid separator, a detector and a computer. The method comprises the following steps of: volatilizing an analyzing element in a volatile halide way and absorbing by absorption liquid by adding an auxiliary heat release agent or an ashing auxiliary agent in the solid sampler. The absorption liquid is introduced into a chemical steam generating system for reacting with potassium borohydride (sodium); and the generated volatile hydride or atomic steam is carried into an instrument atomization area for being detected by atomic fluorescence. The invention directly adopts solid sampling, rapidly realizes the detection of toxic elements, such as arsenic, stibium, selenium, mercury, and the like in the samples, such as geology, environment, food, biology, and the like and has the advantages of higher analyzing speed, low analyzing cost, high detecting sensitivity, high device portability, environmental protection, and the like.

The invention discloses a palladium-free chemical copper-plating method on a graphite nanosheet surface. The palladium-free chemical copper-plating method is characterized in that a graphite nanosheet which is coated with a complete and compact metal copper housing on the surface is finally obtained through dispersing, coarsening, surface hydroxylation, activating, copper plating and passivating in sequence. The graphite nanosheet has a plurality of hydroxyls after surface hydroxylation treatment, and is activated, so that active ions and the graphite nanosheet are combined by chemical bonds, and binding force between a coating and the graphite nanosheet is strong; moreover, a problem that stannous chloride and palladium chloride which are dear and not environment-friendly are used in conventional graphite surface treatment is overcome. Besides, a complexing agent used by copper plating liquid provided by the invention is a composite complexing agent of sodium ethylene diamine tetracetate and citrate, wherein addition of the citrate is 100-400 times the sodium ethylene diamine tetracetate, hardness of the coating is regulated by regulating a proportion of the citrate and the sodium ethylene diamine tetracetate, thereby avoiding only using dear sodium ethylene diamine tetracetate as the complexing agent. The palladium-free chemical copper-plating method disclosed by the invention has environment-friendly effect, is economical and practical, and has good application prospect.

The invention discloses a high-quantum-yield electrochemical luminous gold nanometer cluster probe prepared by an electrochemical reduction method. The electrochemiluminescence gold nanometer cluster probe uses a functional gold nanometer cluster material as a precursor; then, an electrochemical method is used for reduction treatment. The electrochemiluminescence gold nanometer cluster probe is modified on an electrode; peroxydisulfate ions are used as a co-reaction agent; good electrochemical luminous performance is realized. The cluster probe has the characteristics that the preparation method is simple; the reaction conditions are mild; the reproducibility is good; the probe electrochemiluminescence signal intensity is high; the quantum yield is high, and the like. Along with the rapid development of an electrochemiluminescence sensor technology, the condition that the probe has great significance in the fields of chemistry, biology, medicine, environment and the like can be expected.

The invention relates to a method for separating and recycling positive plates of waste lithium iron phosphate batteries, which comprises the steps of firstly cutting the positive plates of the wastelithium iron phosphate batteries into loose segments, putting the segments into a sintering furnace for calcination in an insert atmosphere to obtain calcined waste plates, and vibrating and sieving the waste plates so as to obtain aluminum foil on a vibrating sieve and lithium iron phosphate waste powder below the vibrating sieve. According to the invention, a binder is enabled to lose effectiveness through the calcination under the protection of an inert gas, the toughness and non-oxidation of the aluminum foil are maintained at the high temperature, and the high leaching rate of Li in the later wet recycling process and the difficulty of removing Al in the process are ensured at the same time.

The invention belongs to the field of analysis of harmful ingredients of an electronic cigarette and particularly relates to a method for measuring eight carbonyl compounds in electronic cigarette tobacco tar. The method is characterized in that a DNPH (dinitrophenylhydrazine) solution prepared from diluted hydrochloric acid and the carbonyl compounds in the electronic cigarette tobacco tar have a derivatization reaction, pH (potential of hydrogen) of the reaction solution is adjusted with Tris (trihydroxymethyl aminomethane) base, stability of a reaction product is kept, and the eight carbonyl compounds in the electronic cigarette tobacco tar are analyzed and measured with HPLC (high performance liquid chromatography). The method has the advantages as follows: the sample pretreatment process is simple and rapid; a DNPH derivatization reagent and the Tris base are prepared with deionized water, no organic reagent is used in the pretreatment process, and the method is green and environment-friendly. The method is accurate in measurement, high in sensitivity and good in repeatability and can provide a technical support for product quality control of the electronic cigarette tobacco tar.

The invention discloses a method for preparing super-microporous flexible carbon cloth.Carbon cloth serves as a raw material and is calcined at high temperature in activators, and the super-microporous flexible carbon cloth is obtained.The calcination temperature is 400-1,500 DEG C, and calcination time is 1-24 h.The activators are nitrogen and oxygen, and the volume ratio of nitrogen to oxygen is 100:(0.5-2).The invention further discloses the super-microporous flexible carbon cloth and application of the super-microporous flexible carbon cloth to a flexible all-solid-state capacitor and water electrolysis hydrogen making.According to the technical scheme, a calcination method is utilized for the first time, no reagent is needed, and the synthesis method is simple, environmentally friendly and beneficial for large-scale production; the prepared super-microporous flexible carbon cloth has a large specific area, high-proportion micropores, good electric conductivity and good flexibility and super hydrophilicity.

The invention relates to a high-purity sodium rabeprazole compound, belonging to the technical field of medicine. The method includes the following steps: dissolving crude sodium rabeprazole synthesized by the reaction of rabeprazole and sodium hydroxide in water, adjusting pH value to be faintly acid to neutral by using solid acid salt, and collecting precipitated solid; after dissolving the solid with organic solvent, conducting elution and purification by using eluting agent through macroporous adsorption resin, and collecting eluent; and adjusting the pH value of the eluent to be alkaline, and collecting the precipitated solid to obtain the pure sodium rabeprazole.

The invention relates to the technical field of preparation and repair of sliding bearing Babbitt metal anti-friction layers. The novel cold spraying technology is introduced into manufacturing and repair remanufacturing of a Babbitt metal sliding bearing bush lining anti-friction layer, atomization powder feeding is adopted to obtain coating microstructures with uniform components and fine dispersely-distributed and uniformly-dense crystal grains and second phases through cold spraying, and the good interface bonding characteristic is obtained through tinning layer setting and sprayed thermal treatment; the defects of poor structure uniformity, thermal impact, stress, cracking and oxidizing burning losses existing in the technologies such as a traditional casting method, an overlaying method and a thermal spraying method are overcome, the bearing bush component preparation quality and level are improved, the bush burning frequency is decreased, stopping supercritical vibration is lowered, the stability, accuracy and reliability of a bearing transmission unit are improved, and the service life of the bearing transmission unit is prolonged; the method is rapid, efficient and environmentally friendly, is used for bearing bush manufacturing and repair remanufacturing, and has good economic benefits and social benefits.

The invention relates to a monatomic noble metal catalyst, a preparation method thereof and application thereof in the room-temperature catalytic oxidation of formaldehyde. The catalyst is prepared bythe following steps: (1) modifying activate carbon, dipping activate carbon into a noble metal salt solution, so as to obtain dipping liquid; (2) mixing a reducing agent solution with the dipping liquid in the step (1) in an ultralow temperature environment, and reacting; and (3) filtering the reactant in the step (2), washing, and drying, so as to obtain a loaded monatomic noble metal catalyst.The method is simple and environment-friendly, the noble metal in the prepared catalyst is dispersed to the surface of metal oxide, the content of noble metal is 0.01wt%-0.3wt%, the catalyst is applied to the room-temperature catalytic oxidation reaction of formaldehyde, and the removal rate of formaldehyde reaches up to over 93%.

The invention discloses a preparation method of vinylphenylpolysiloxane. The method comprises the following steps: 1) stirring a solvent, diphenyl silanediol, an alkyloxy compound and a catalyst and heating the mixture in a reaction vessel to react for 1-40h, and adding an end plate agent for blocking; 2) heating the above mixed liquor and stirring; 3) standing and filtering; and 4) heating a filtrate, removing low-boiling-point substances so as to obtain vinylphenylpolysiloxane. The invention also discloses vinylphenylpolysiloxane prepared by the above method and an application of vinylphenylpolysiloxane in LED package resin. The preparation method of vinylphenylpolysiloxane has the following advantages: firstly, resin storage stability is raised; secondly, it is convenient for industrialization; and finally, generation of industrial wastewater is avoided, and the preparation method is more environmentally friendly. Refractive index of the vinylphenylpolysiloxane disclosed by the invention is 1.50-1.57, and the vinylphenylpolysiloxane is especially applicable to be used as a strengthening agent of macromolecules in an LED packaging material.

The invention discloses a method for extracting chlorogenic acid from Lonicera japonica leaves activated under catalysis of enzyme, belonging to the technical field of chlorogenic acid extraction. According to the method, the solid waste of Lonicera japonica leaves, used as raw material, is prepared into the target product by the simple processes of treatment on Lonicera japonica leaves, enzymatic hydrolysis, ultrasonic wave synergistic digestion and chlorogenic acid preparation. The raw material used in the method provided by the invention is cheap and easily available, and the method has the characteristics that the waste is fully used, the prepared chlorogenic acid product is high in extraction ratio and purity and complete in biological activity, energy consumption in production process is low, the production equipment is hardly corroded, the consumption of organic solvent is low, environment protection is facilitated, and so on. The method provided by the invention can be widely used for extracting natural products, such as chlorogenic acid, isochlorogenic acid and Ginnol, from the solid waste of Lonicera japonica leaves, and effectively realizes the resource utilization of the Lonicera japonica leaves.