10458results about How to "Suitable for large-scale industrial production" patented technology

The invention provides an activated alumina and activated carbon compounded material and a preparation method thereof. According to a formula, the material comprises the following raw materials in percentage by mass: 40 to 99 percent of aluminum hydroxide, 1 to 60 percent of activated carbon, and 15 to 35 percent of binder. The material is prepared by uniformly mixing, pelleting, ageing, molding, airing, sintering, rinsing, drying and the like. The invention aims to compound the activated carbon with the activated alumina; on the one hand, the material with a certain shape can be processed, the defects of loose shape, low strength, difficult recovery and the like of the activated carbon are overcome, and the material is easy to recycle; and on the other hand, the adsorption property of the activated alumina material is greatly improved. The method has the advantages of simpleness, practicality, readily available raw materials, low cost and suitability for industrial mass production, and can be widely applied to various fields such as industry, agriculture, environmental protection, air purification, water treatment and the like.

The invention relates to a preparation method of a porous metal organic skeleton material. The porous metal organic skeleton material comprises at least a metal ion and at least an organic compound that can be matched with the metal ion. The material can be prepared by dissolving metal compounds, organic ligand, and sustained-released alkali into a solvent and carrying out direct water (solvent) thermal synthesis at a certain temperature under a certain pressure so as to obtain the porous metal organic skeleton material. The operation of the provided preparation method is simple, the preparation method is suitable for massive industrial production and is suitable for the synthesis of porous metal organic skeleton membrane, and the provided porous metal organic skeleton material is used to absorb, separate, and store gas.

The invention relates to a high strength heat-resistant magnesium alloy containing rare earths of the technical field of metallic materials and a preparation method thereof. The magnesium alloy comprises the following components according to the mass percent: Y with more than or equal to 3% and less than or equal to 16%, Gd with more than or equal to 0% and less than or equal to 10%, Ca with more than or equal to 0.3% and less than or equal to 5%, Zr with more than or equal to 0.1% and less than or equal to 1.5%, and one or a plurality of Nd, Si, Sb, Ti, Sn, Sr, Bi, Cd, Nd with more than or equal to 0% and less than or equal to 5%, Si with more than or equal to 0% and less than or equal to 5%, Sb with more than or equal to 0% and less than or equal to 5%, Ti with more than or equal to 0% and less than or equal to 5%, Sn with more than or equal to 0% and less than or equal to 5%, Sr with more than or equal to 0% and less than or equal to 5%, Bi with more than or equal to 0% and less than or equal to 5%, Cd with with more than or equal to 0% and less than or equal to 5%, and the rest is Mg and impurities. The magnesium alloy is obtained by using melting and the subsequent heat treatment. The magnesium alloy not only can serve as casting magnesium alloy but also can serve as the deformation magnesium alloy and has better predominant mechanical property compared with the WE series commercial magnesium alloy.

This invention relates to an entirely new technology of completely recovering chromium and vanadium from vanadium-chromium miscible liquid. The main procedures include: first a primary-secondary compound amine extracting agent contacts the vanadium-chromium miscible liquid by means of countercurrent contact and extract, so as to extract most of vanadium and a small amount of chromium into a organic phase while most of chromium stays into a aqueous phase; and a reduction reaction is conducted with pH of acid adjustable faffinate (aqueous phase) and a certain amount of a reducing agent; the sodium hydroxide is used for adjusting pH value of the solution and filter, and finally the product is hydrous chromium oxide; at that time, the lye is used as a stripping agent; the vanadium is stripped from the vanadium-rich organic phase into water in the manner of countercurrent contact; and the vanadium is separated from the solution witthe method of ammonium precipitation and in the form of ammonium metavanadate; and finally the supernatant clear solution of the one is processed with deposited vanadium with a high-efficient distillation technology, and the strong aqua ammonia is left in the tower top and deamidization solution is left in the tower bottom until the extraction process is reached. The invention uses the primary-secondary compound amine as the extracting agent, extracts and separates vanadium and chromium selectively at a low temperature. The invention not only has a simple process flow, but also is low-cost, quite applicable in large-scale industrial production. In addition, the invention also provides high-purity ammonium metavanadate and 16 percentage strong aqua ammonia, and makes sure the vanadium and chromium can be completely recovered through re-use of the solution.

The invention discloses a method for preparing cycloxylidin, which belongs to the technical field of pesticides preparation. The method comprises the following steps: under nitrogen protection, N-nitroiminoimidazolidine and an organic solvent are added in a reactor, then sodium hydride is added in batches, and the material is heated to the temperature of 50-60 DEG C, chloropropylene oxide is added drop by drop in the reactor, after the reaction product is cooled, chloroform is added, and the product is filtered by diatomite, then evaporative crystallization is carried out, and the crystals can be precipitated, vacuum distillation is carried out on a processed filtrate to obtain a light yellow dense solid, then heat chloroform is used for extraction, and finally heat ethanol or acetone is used for recrystallization to obtain cycloxylidin: 1-(2,3-glycidyl)-N-nitroimidazoline-2-ylamine, wherein the yield is about 83%. The method has the advantages of short reaction time, high yield and green environmental protection, and is more suitable for large-scale industrial production.

The invention discloses a silicon carbon composite material and a preparation method thereof. The material disclosed by the invention comprises a porous silicon substrate, a one-dimensional carbon nano material and amorphous carbon, wherein the one-dimensional carbon nano material is a carbon nano tube or carbon nano fiber. The preparation method disclosed by the invention comprises the following steps: preparing the porous silicon substrate; loading a catalyst precursor; and carrying out the chemical vapor deposition. The one-dimensional carbon nano material directly grows on the porous silicon substrate, and the one-dimensional carbon nano material and the porous silicon substrate are coated with the amorphous carbon. The silicon carbon composite material provided by the invention is suitable for the cathode material of a lithium ion battery, and has the advantages of high capacity and stable circulation performance. A constant-current charge and discharge test is carried out under the 300mA / g current density, and the silicon carbon composite material disclosed by the invention has the characteristics that the first reversible capacity is 1149mAh / g; the reversible capacity is 1087mAh / g after the circulation is carried out for 100 times; and the capacity conservation rate is up to 95%.

The present invention relates to a doped multi-layer core-shell silicon-based composite material for a lithium ion battery, and a preparation method thereof. Other than being doped with a necessary lithium element, the material is also doped with at least a non-metallic element and a metal element; the material has a structure in which a silicon oxide particle doped with elements is taken as a core, and a multilayer composite film which is tightly coated on the surface of the core particle is taken as a shell; the core particle contains uniformly dispersed monoplasmatic silicon nanoparticles,the content of doping elements gradually decreases from the outside to the inside without a clear interface, and a dense lithium silicate compound is formed on the surface of the core particle by embedding and doping the lithium element; and the multilayer composite film is a carbon film layer and a doped composite film layer composed of the carbon film layer and other elemental components. The doped multi-layer core-shell silicon-based composite material provided by the present invention has a high capacity, good rate performance, high coulombic efficiency, good cycle performance, a low expansion rate, and other electrochemical characteristics when the material is used for the negative electrode of lithium ion battery.

The invention discloses a method for preparing graphene by taking biomass as a raw material. The method comprises the following steps: dipping the biomass in an organic solvent for 1-5 hours, centrifuging, drying, calcining for 1-24 hours at the temperature of 600-1600 DEG C in the presence of inert gas, and cooling, thus obtaining graphene. The method for preparing the graphene by taking the biomass as the raw material has the advantages that cheap and easily available biomass is taken as the raw material, the problem of aftertreatment of dried-up herbaceous plants is effectively solved, and an effective path is provided for high value-added utilization of the herbaceous plants; a preparation technology in each step is controllable and is high in repeatability, the prepared graphene is obvious in exfoliation, and the minimum lamellar thickness is 3nm only; and the method is simple and environmentally friendly, low in capital investment and suitable for large-scale industrial production.

The invention discloses a method for regenerating a positive active material from waste lithium iron phosphate batteries. The method comprises the steps as follows: 1) waste lithium iron phosphate batteries are discharged in saline water, and organic solvents, roll cores and casing materials are disassembled; 2) the roll cores are subjected to crushing, calcination and other steps, and active materials, copper foil and aluminum foil are separated through vibrating screening. Fluorine-containing waste gas is absorbed with lime water, the copper foil and the aluminum foil are separated with a magnetic separation method, the active materials are leached out with sulfuric acid, and a leachate and carbon residues are obtained through separation; 3) Cu<2+> in the leachate is reduced to elementary copper by adding iron powder, meanwhile, Fe<3+> is reduced to Fe<2+>, copper and excessive iron residues are filtered out, aluminum is removed through precipitation with an alkaline liquid, the filtrate is supplemented with a phosphorus source after filtration, the pH value is adjusted by adding the alkaline liquid, coarse lithium iron phosphate precipitates are produced, and finally, battery-grade lithium iron phosphate is obtained through sintering. Comprehensive utilization of the waste lithium iron phosphate batteries and regeneration of the active materials are realized with a simple, practical, economical and feasible method, no secondary pollution is produced, and the method is suitable for industrial production.

The invention relates to a sulfonamides compound for inhibiting carbonic anhydrase II and a synthesis method and an application thereof. The compound has the structure as shown in the specification. The invention features economical and reasonable synthetic route and high utilization of resources. The synthesis method is simple and easy to carry out and is more suitable for large-scale industrialized production. With human carbonic anhydrase II (Human Carbonic Anhydrase II, hCA II) expressed by procaryotic cell as an enzyme source, the invention establishes an in-vitro carbonic anhydrase inhibitor screening model. In addition, the compound of the invention has inhibitive effect on activity of the human carbonic anhydrase II.

The invention relates to non-quenched cold heading steel for high-strength fasteners and a preparation process thereof. The non-quenched cold heading steel comprises the following components in percentage by weight: 0.15-0.35% of C, not more than 0.30% of Si, 0.8-1.80% of Mn, 0.20-0.80% of Cr, 0.01-0.10% of Al, not more than 0.035% of P, not more than 0.035% of S and the balance of iron and impurities. The process comprises the following steps of: preparing a casting blank having the same components with the non-quenched cold heading steel, heating the casting blank, and carrying out controlling rolling, coil collecting and controlling cooling treatment to form rod bundles as finished products. The non-quenched cold heading steel for high-strength fasteners has moderate strength, good plasticity, low deformation resistance in the cold heading and shaping of the fasteners, simple manufacturing process, effective saving of energy resources, environment pollution reduction and cost reduction, and is suitable for industrial production on a large scale.

The invention discloses a method for preparing a lithium iron phosphate nano composite microsphere for a lithium-ion secondary battery anode material by a hydrothermal method, which comprises the following steps: evenly mixing a lithium source, an iron source and a phosphoric acid source according to the stoichiometric ratio of 1-1.05:1:1 to prepare an aqueous solution with certain concentration, adding proper amount of reducing agent, carbonizing agent, ion dopant and the like into the aqueous solution, growing and curing crystals under high-temperature hydrothermal condition, removing a solvent from a hydrothermal product, and burning the hydrothermal product in inert or reducing atmosphere to obtain a final product. The lithium iron phosphate anode material prepared by the method has a regular nano composite microsphere structure, has a particle diameter of between 2 and 4 mu m, even distribution, tap density up to 1.3 to 1.6 g / cm, and has excellent cycle performance and multiplying power performance. The method has simple and easily-controlled process, can use cheap trivalent iron as the iron source, can obtain rich raw materials, and is a practical technique for preparing lithium iron phosphate.

The application relates to a pre-irradiation polypropylene graft copolymer and a preparation method thereof. At present, the exploration of methods for improving surface property remains a research hotspot in the field of modification of polypropylene always. The method comprises the following steps: performing pre-irradiation on polypropylene resin after having constant weight at the temperature of 60 DEG C by using a 60 Co radiation source or a DD-1.2 / 1.0-800 type high-frequency high-pressure electron accelerator in air, keeping the dosage rate at 300Gy / min, keeping the dose at 3-50kGy, adding the pre-radiated polypropylene resin into solution containing N, N'-methylenebis acrylamide, auxiliary monomers and additives, keeping the using amount of the N, N'-methylenebis acrylamide to be 0.5-5% by weight of the weight of polypropylene, performing nitrogen filling and oxygen removal on mixed solution for 30 minutes, then heating to 50-75 DEG C for performing reaction for 6 hours under magnetic stirring, nitrogen production and reflux conditions, washing the polypropylene resin which is filtered out with ethanol-water twice, further extracting with ethanol-water solution for 24 hours, drying at the temperature of 60 DEG C and enabling the weight to be constant. The method is used for preparing the polypropylene graft copolymer.