14 results about "Manganese monoxide" patented technology

The application discloses a method for treating organic pollutant wastewater by using manganese monoxide-graphite diacetylene nano-confined catalytic material to activate persulfate, the method is to degrade and treat organic pollutant wastewater by using manganese monoxide-graphite diacetylene nano-confined catalytic material as a catalyst for activating persulfate, and the nano-confined catalytic material comprises graphite diacetylene nanosheets, and manganese monoxide nanoparticles are confined between the layered structures of the graphite diacetylene nanosheets.The method has the advantages of rich active sites, fast electron transfer and stable structure, so that the catalytic degradation system is not only high in efficiency, but also strong in adaptability, and shows good degradation effect on various organic pollutants, and has the advantages of simple process, convenient operation, high treatment efficiency, good removal effect, strong adaptability, green environmental protection and the like, and has important promoting significance for deep purification of organic pollutant wastewater.

The invention relates to the field of resource utilization of industrial solid wastes, in particular to a method for preparing battery-grade manganese sulfate by purifying industrial solid wastes, which comprises the following steps: by taking silicomanganese metallurgical fly ash as a raw material, grinding, alkaline leaching, heating reaction and centrifugal separation to obtain manganese-containing filter residues; and the battery-grade manganese sulfate is prepared through the steps of sulfuric acid neutralization, filter pressing, oxalic acid-manganese monoxide refining, evaporative crystallization and the like. According to the method, all-component high-value utilization of elements such as manganese, silicon and potassium in the fly ash is achieved, the raw material recovery rate reaches 99.7% or above, the purity of the prepared manganese sulfate is larger than or equal to 99.5%, meanwhile, by-products such as potassium sulfate, sodium chloride, aluminum hydroxide and sludge containing 80% of silicon dioxide are produced, and remarkable economic benefits and ecological benefits are achieved.

The application provides a lithium-rich lithium manganate, a preparation method and application thereof, and belongs to the field of lithium batteries. The application provides a preparation method of the lithium-rich lithium manganate, which comprises the following steps: mixing lithium oxide, manganese monoxide and tetravalent metal oxide, and then sintering to obtain the lithium-rich lithium manganate. The introduced tetravalent metal ions can improve structural stability, improve cycle performance, increase the average valence of transition metal oxides, inhibit cation mixing and irreversible phase transition (such as H2-H3 phase transition of nickel-rich materials and Jahn-Teller distortion of manganese-based materials) in the charging and discharging process, thereby significantly improving the long cycle stability of the material. In addition, the electronic and ionic transport kinetics can be optimized, and the rate performance can be improved. The introduction of tetravalent metal can adjust the electronic structure of the material, reduce the band gap, and improve the electronic conductivity of the material, thereby reducing the charge transfer resistance and improving the large-current charging and discharging performance.

The invention relates to a method for removing iron and aluminum impurities in strong acid liquid, and belongs to the field of hydrometallurgy and resource utilization. The method specifically comprises the following steps: adding manganese monoxide powder (MnO) into a strongly acidic aqueous solution containing iron and aluminum, and gradually adjusting the acidity of the system under a mild condition, so that iron and aluminum ions form insoluble precipitates; after solid-liquid separation and washing, the removal rate of iron and aluminum exceeds 90%, and the loss of target elements such as magnesium and lithium is small. According to the method, introduction of exogenous sodium salt is avoided, the ionic strength shielding effect caused by strong electrolyte such as NaCl is effectively avoided, a recessive chlorine salt buffer system is prevented from being formed, and it is ensured that pH adjustment is more flexible and controllable. The method is suitable for pretreatment processes of various acidic industrial liquids such as titanium slag water quenching liquid and lepidolite pickle liquor. The method has the advantages of low raw material cost, large precipitate particles, easiness in filtration, mild operation conditions and the like, and is suitable for industrial-scale application and popularization.

The invention belongs to the technical field of energy conservation and environmental protection, and particularly relates to a surface plasmon enhanced ozonolysis multilayer fiber structure which comprises a substrate and a manganese oxide fiber layer and particularly comprises a precious metal particle layer, a titanium dioxide fiber layer and a visible light source, the substrate is provided with through holes, the manganese oxide fiber layer is arranged on the substrate, and the titanium dioxide fiber layer is arranged on the substrate. The precious metal particle layer is arranged on the manganese oxide fiber layer, the titanium dioxide fiber layer is arranged on the precious metal particle layer, the visible light source emits visible light, and the visible light penetrates through the titanium dioxide fiber layer to irradiate the precious metal particle layer. According to the invention, the problem that a traditional single manganese oxide catalytic layer is easily covered by an intermediate and is rapidly inactivated is avoided, so that the manganese oxide fiber layer can still keep stable and efficient catalytic performance in long-term work.

The invention belongs to the field of new material preparation and electrochemical energy storage, and relates to a method for preparing a lithium manganate positive electrode material by utilizing microwave discharge to reinforce submicron zinc powder recovery and conversion of waste zinc-manganese batteries and application of the lithium manganate positive electrode material. On the basis of microwave dielectric loss characteristics of conductive carbon black and metal oxide in the waste zinc-manganese battery, local strong discharge is excited in a microwave field to form an instantaneous high-temperature plasma high-activity microcell rich in active particles, so that selective reduction separation of battery components is accelerated. Zinc oxide is reduced into submicron zinc powder, manganous-manganic oxide is reduced into manganic oxide, and the manganic oxide and the manganic oxide are enriched in the microwave pyrolysis slag; and mixing the pyrolysis slag with lithium carbonate, heating in pure oxygen, and sintering MnO and Li2CO3 in situ to obtain lithium manganate. By constructing a full-dry phase recovery reconstruction system, near-full-amount recovery of zinc and manganese metal components and high-value gain of products are realized under the condition of no acid-base reagent, zero-pollution emission is realized in the whole process, and a new atomic economical clean metallurgy scheme is provided for recycling of waste batteries.

This application provides an anode active material and its preparation method, an anode for sodium-ion batteries, a sodium-ion battery, and a power device. The anode active material comprises a nitrogen-doped carbon sphere matrix and manganese monoxide embedded within the nitrogen-doped carbon sphere matrix; the average particle size of the manganese monoxide is 1.5 nm to 2.5 nm. In the above-mentioned anode active material, embedding quantum dot-level MnO within the nitrogen-doped carbon sphere matrix achieves a tight intercalation structure (non-surface loading) between the quantum dot-level MnO and the nitrogen-doped carbon spheres, effectively mitigating the volume expansion during sodium ion insertion and extraction, and providing a highly efficient electron / ion transport channel. Simultaneously, the quantum dot-level MnO has a larger specific surface area, and the nitrogen-doped carbon provides more adsorption sites; therefore, the composite material exhibits pseudocapacitive-dominated sodium storage behavior, endowing it with ultra-high rate performance and ultra-long cycle life.

The application provides a manganese-based composite lithium supplement agent with adjustable phase structure and a preparation method and application thereof, and belongs to the technical field of lithium ion battery lithium supplement. The application provides a preparation method of the manganese-based composite lithium supplement agent with adjustable phase structure, which comprises the following steps: mixing manganese oxide and a lithium source to obtain a mixture; the manganese oxide is a mixture of any one or more of manganese sesquioxide, manganese dioxide and trimanganese tetraoxide and manganese monoxide; the mixture is pre-sintered, then solid-phase sintered, and finally crushed to obtain the manganese-based composite lithium supplement agent with adjustable phase structure. The results of the examples show that the first circle charge specific capacity (~4.8V) of the battery prepared from the manganese-based composite lithium supplement agent provided by the application can reach about 800-900 mAh / g, and the energy density of the battery is significantly improved.

The invention relates to the technical field of adsorption materials, and discloses a preparation method of an adsorption material for treating radioactive wastewater containing strontium and cobalt, and the preparation method of the adsorption material comprises the following steps: step 1, preparing a diatomite carrier: a1, adding diatomite into deionized water and mixing to form a mixture, stirring on a magnetic stirrer for a period of time; step 2, synthesizing monohydroxy manganese monoxide (MnO (OH)), and loading the monohydroxy manganese monoxide on the carrier, specifically comprising the following operations: b1, adding manganese chloride tetrahydrate and potassium permanganate under continuous stirring, and then adding a sodium hydroxide solution; and b2, heating the obtained mixture in a water bath, continuously stirring for 1 hour, filtering, washing for multiple times, and drying at room temperature for 24 hours to obtain the diatomite loaded MnO (OH) adsorbent. The composite adsorption material prepared by the method is low in price, the preparation method is simple, the composite adsorption material has wide pH adaptability, the strontium selective adsorption effect reaches 98% or above, and the cobalt selective adsorption effect reaches 99% or above.

The application belongs to the technical field of chemical industry and base material film, and particularly relates to a preparation method of a matte polyethylene base material film, S1: selecting ethylene as raw material; S2: drying ethylene through a dryer, and then mixing and adding the ethylene and n-hexane diluent into a mixing reaction kettle; S3: adding a catalyst containing manganese monoxide. The application adjusts the molecular weight of high-density polyethylene film, reduces the molecular weight and the molecular chain length, adds impurities in the high-density polyethylene film, and then adjusts the molecular weight of low-density polyethylene film, reduces the molecular weight and the molecular chain length. Through the oxidation reaction of manganese element and the contact between the manganese element in the high-density polyethylene film and the low-density polyethylene in the degradation process of the high-density polyethylene film, the oxidation reaction is improved, the degradation speed is improved, the degradation time of the packaging base material film is greatly shortened, the degradation time of polyethylene in the normal environment is avoided to be too long, and the harm of degradation in different environments to the environment is reduced.

The invention belongs to the technical field of PEM electrolyzed water, and particularly relates to a manganese-doped cathode hydrogen evolution catalyst and a preparation method and application thereof. The cathode hydrogen evolution catalyst takes manganese oxide and catalyst carrier carbon black as carriers to load platinum, the mass ratio of the platinum to the manganese oxide to the carbon black is 1: (10-50): (15-150), the mass fraction of the platinum is 0.5%-4%, and the manganese oxide is one or more of manganese monoxide, manganese dioxide, manganese sesquioxide or manganous-manganic oxide. By introducing manganese, more active sites of platinum can be increased, so that the inherent activity of Pt sites is effectively improved, and the membrane electrode performance of the manganese-doped cathode hydrogen evolution catalyst prepared by the method is obviously improved.

The utility model discloses a low-loss manganese sulfate leaching system which comprises a first feeding device for feeding manganese monoxide, a second feeding device for feeding mother liquor, a third feeding device for feeding sulfuric acid, a reaction device, an adjusting device for feeding calcium carbonate and a cleaning device for supplying clear water, the first feeding device comprises a feeding hopper, a conveying belt and a slurrying pool, the feeding hopper is connected with the conveying belt, and the discharging end of the conveying belt is connected with the slurrying pool; the slurrying tank is also connected with the second feeding device; the slurrying tank, the third feeding device, the adjusting device and the cleaning device are all connected with the reaction device, and the reaction device is a closed reaction container. The device can realize fine processing production of continuous pyrolusite leaching, the process is controllable, the manganese content of slag is reduced, the manganese leaching rate is effectively improved, and the device has a good application prospect.

The invention discloses a preparation method of electrolytic manganese metal, which comprises the following steps: S1, adding manganese carbonate and manganese monoxide mineral powder into anolyte to prepare slurry, and adding waste acid to react completely after the slurry is prepared; s2, adjusting the pH value, introducing an oxidizing agent, then adding SDD, and filtering to remove solid precipitate; s3, adsorption and impurity removal are conducted, then an ammonia water solution and hydrogen peroxide are added, solid-liquid separation is conducted after the reaction is completed, and an electrolytic solution is obtained; and S4, the electrolytic solution is used for electrolysis, and the electrolytic manganese metal is prepared. Sulfuric acid, manganese, potassium and other components in the waste acid are fully utilized, on one hand, the raw material cost is greatly reduced, on the other hand, the problems that waste acid treatment is difficult and high in cost are solved, valuable components in the waste acid are recycled, and comprehensive utilization of waste resources is achieved; and a low-cost, high-efficiency and environment-friendly electrolytic manganese production process is formed, and the method has remarkable industrial application value and popularization prospect.

The invention discloses a waste ternary lithium battery black powder full-resource recycling method, and belongs to the technical field of lithium battery recycling and hydrometallurgy. According to the method, waste hydrochloric acid containing ferrous chloride is used as a leaching agent, the waste ternary lithium battery black powder is subjected to reduction leaching for 2-4 hours at the temperature of 60-90 DEG C, after liquid-solid separation, filter residues are calcined and purified, and graphite powder with the purity larger than or equal to 99% is obtained; after manganese monoxide is added into filtrate to remove impurities, P204 and P507 nickel hydroxide saponification organic phases are sequentially used for extracting manganese and cobalt, and manganese sulfate and metal cobalt / high-purity cobalt powder are prepared after reverse extraction; after cobalt extraction, lithium carbonate and metal nickel / high-purity nickel powder are recovered from a water phase through lithium precipitation, electrodeposition or hydrogen reduction, lithium precipitation mother liquor is recycled to the leaching step, and solid sodium chloride is recovered when the concentration of NaCl reaches 180g / L; according to the method, waste hydrochloric acid resource utilization and nickel hydroxide sodium-free saponification are adopted, the nickel extraction procedure is omitted, the metal recovery rate of nickel is larger than or equal to 98.5%, the metal recovery rate of cobalt is larger than or equal to 98.5%, the metal recovery rate of manganese is larger than or equal to 98%, the metal recovery rate of lithium is larger than or equal to 97%, the advantages of being low in agent cost, simplified in process, environmentally friendly, capable of reaching the standard and the like are achieved, and full-resource high-value recovery of nickel, cobalt, manganese, lithium and graphite in the black powder is achieved.