63 results about "Potassium permanganate" patented technology

The present application belongs to the technical field of waste oil recycling, and particularly relates to a method for recycling and processing by-products of edible vegetable oil processing, comprising the following steps: S1, mixing raw materials with deionized water and potassium permanganate, wherein the raw materials comprise soapstock, oil foot and deodorized distillate; S2, performing gradient separation treatment on the mixed liquid obtained in step S1, wherein the gradient separation treatment comprises centrifugal separation, mixed solvent extraction and ultrasonic-assisted separation; and S3, recycling oil and fat products and solid products obtained in step S2. The present application realizes the collaborative treatment of multiple types of by-products, the comprehensive recovery rate of oil and fat reaches more than 85%, the energy consumption is reduced by 35%, the use of strong acid and strong base is avoided, it is green and environmentally friendly, the operation is simple, and it is suitable for industrial application.

The present application relates to the technical field of graphite material, and provides a method for preparing high-expansion-volume expanded graphite by activation or pretreatment. In the method, natural flake graphite, potassium permanganate, concentrated sulfuric acid and an activating agent are mixed to perform an oxidation intercalation reaction, and then high-expansion-volume expanded graphite is obtained by high-temperature expansion. Alternatively, in the method, natural flake graphite is pretreated by a pretreatment agent, and then an oxidation intercalation reaction and high-temperature expansion are performed to obtain high-expansion-volume expanded graphite. By activation or pretreatment, the method can improve the expansion volume of expanded graphite. In particular, when the pretreatment method is used, the method can prepare expanded graphite with significantly increased expansion volume on the basis of reduced use of oxidizing agent and intercalating agent, and the expansion effect is more significant.

The application relates to a chromium ion form analysis method based on electrochemical and Raman bimodal detection signals. Au-Ag Janus NPs solution is added dropwise on the surface of a glassy carbon electrode, the DPV signal value and the Raman signal value of a to-be-detected solution containing Cr 6+ and Cr 3+ are detected, the concentration of Cr 6+ in the to-be-detected solution is obtained, Cr 6+ in the to-be-detected solution containing Cr 3+ and Cr 3+ is oxidized into Cr 6+ under the conditions of strong alkalinity and heating by using potassium permanganate, then a reducing agent is added to obtain a mixed solution, the concentration of Cr 6+ in the mixed solution is detected through the DPV signal value and the Raman signal value, Cr 3+ is completely converted into Cr 6+ , the total chromium concentration is measured, finally the concentration of Cr 3+ is obtained by subtraction, and finally the chromium ion form analysis is realized. The method improves the accuracy and efficiency of Cr ion form detection, and is suitable for rapid analysis of Cr ion forms in environment and biological samples.

This invention belongs to the field of catalyst technology, and relates to a flower-like multifunctional CuO@MnO2 composite material, its preparation method, and its application. The composite material constructs a flower-like core-shell structure with CuO as the core and thin-film MnO2 as the shell. The preparation method is as follows: rod-shaped copper hydroxide is added to deionized water and ultrasonically mixed to obtain a copper hydroxide suspension; potassium permanganate is dissolved in the copper hydroxide suspension and ultrasonically mixed to obtain a mixed solution B; mixed solution B is subjected to a hydrothermal reaction, and after the reaction is completed, it is cooled, washed, and dried to obtain the flower-like multifunctional CuO@MnO2 composite material. This method not only maximizes the interfacial contact area between the two phases and promotes interfacial charge transfer to achieve a synergistic catalytic effect, but also provides a MnO2 shell with good stability, forming a physical and chemical barrier for the CuO core and effectively inhibiting the excessive leaching of copper ions. Furthermore, the prepared CuO@MnO2 exhibits good catalytic performance, stability, and reproducibility.

The present application relates to the technical field of water treatment, and particularly relates to a pretreatment method of high-algae raw water, a composite water purifying agent for high-algae raw water and a treatment method of high-algae raw water. The pretreatment method comprises the following steps: adding a water purifying agent A into high-algae raw water to be treated, wherein the water purifying agent A is a biomass charcoal material loaded with potassium permanganate; after a predetermined time interval, continuously adding a water purifying agent B into the high-algae raw water to complete the pretreatment, wherein the water purifying agent B comprises a water-soluble divalent iron salt, a water-soluble trivalent iron salt and chitosan. The method realizes mild pre-oxidation through the slow-release effect of the loaded oxidant, inactivates the algae cells but avoids rupturing; and combines the adsorption and the agglomeration and wrapping effect of the in-situ generated iron-manganese hydrate oxide to form stable composite particles. The process can efficiently remove the algae cells and algae-derived odor substances, significantly reduces the disinfection by-product generation potential, and the formed composite particles can strengthen the subsequent conventional coagulation, thereby saving the drug consumption.

The present application relates to the technical field of catalyst, in particular to a kind of iron-doped manganese oxide catalyst and its preparation method and application.The present application is modified by sulfuric acid, manganese salt compound is dissolved in sulfuric acid aqueous solution, ferrous sulfate and potassium permanganate are added, stirring treatment is carried out, the product after treatment is separated, after washing multiple times, Fe / MnO2 Solid is obtained.The method enhances Fe-Mn bimetallic synergistic effect by sulfuric acid medium, significantly increases the number of active oxygen species on the surface of catalyst, so as to realize the efficient catalytic oxidation of toluene at low temperature.The preparation method of the present application is simple, low in energy consumption and cost saving.Under the condition of toluene concentration 2000mg / m 3 , space velocity 60000mL / (g·h), the catalyst prepared can realize toluene conversion rate ≥90% at 220℃~260℃, and has good industrial application prospect.

The application discloses a kind of cathode material for low-temperature metal fuel cell and its preparation method and application, preparation nitrogen-doped carbon nanotube as carrier;Utilize the liquid phase oxidation-reduction method of potassium permanganate and manganese sulfate, and introduce cobalt nitrate to carry out one-step hydrothermal synthesis;Utilize the doping effect of cobalt ion to control product crystal phase, and synthesize the rod-shaped structure of MnOOH and CoMn2O4 Nanocomposite on carrier.The obtained cathode material is through the synergistic effect of nitrogen-doped carbon carrier and metal oxide, significantly reduce the energy barrier of low-temperature oxygen reduction reaction.The cathode material has 0.79 V half-wave potential and 5.58 mA·cm ‑2 Limit diffusion current density under-10 ℃ environment;The assembled aluminum-air battery shows 1.56 V open-circuit voltage and 9.71 mW·cm ‑2 Power density under-40 ℃ environment, can be discharged stably for 16.2 h under 2 mA·cm ‑2 Current density, better than commercial Pt / C catalyst.In cold region emergency power supply, polar scientific expedition, military equipment and other extreme low-temperature scenes have significant application value.

This invention discloses a solidification and stabilization agent and treatment method for sieved humic soil in landfills. The agent comprises: a cementing component, a heavy metal stabilizing component, an organic matter passivating component, a pore-regulating component, and a process conditioning component. The cementing component includes steel slag, fly ash, and sulfoaluminate cement; the heavy metal stabilizing component includes calcium dihydrogen phosphate and sodium sulfide; the organic matter passivating component includes potassium permanganate; the pore-regulating component includes desulfurized gypsum and an air-entraining agent; and the process conditioning component includes a polycarboxylate superplasticizer and a triethanolamine early-strength agent. This invention provides core strength through a synergistic cementing system of steel slag-fly ash-sulfoaluminate cement, combines a phosphate-sodium sulfide dual stabilization mechanism to fix heavy metals, uses potassium permanganate to oxidize and passivate humic acids, and introduces desulfurized gypsum and an air-entraining agent to regulate the pore structure. The agent of this invention can significantly improve the mechanical properties of the solidified body, reduce permeability, and effectively inhibit the leaching of heavy metals and organic pollutants.

This invention discloses a Co-doped α-MnO2 material, its preparation method, and its application in anode materials, comprising the following steps: Step 1: Dissolving potassium permanganate (KMnO4) and cobalt nitrate hexahydrate (Co(NO3)2·6H2O) in deionized water and stirring to obtain a homogeneous precursor solution; Step 2: Adding hydrochloric acid solution dropwise to the precursor solution and stirring continuously to ensure thorough mixing; Step 3: Transferring the mixed solution to a high-pressure reactor lined with polytetrafluoroethylene for hydrothermal reaction; Step 4: After the reaction, centrifuging, washing, and drying the product to obtain the Co-doped α-MnO2 material. This invention exhibits significantly improved discharge specific capacity and excellent rate performance at low current densities.

The application provides a tunnel type manganese dioxide and a preparation method and application thereof. The preparation method comprises the following steps: mixing a manganese precursor and an oxidizing agent in a solvent to obtain a mixed solution; the manganese precursor comprises manganese sulfate, and the oxidizing agent comprises ammonium persulfate and / or potassium permanganate; the manganese precursor: the oxidizing agent: the solvent is 10-30 mmol: 10-60 mmol: 50-70 ml; the pH value of the mixed solution is adjusted to be acidic, and the tunnel type manganese dioxide is obtained through a hydrothermal reaction; the tunnel type manganese dioxide comprises beta-MnO2, gamma-MnO2 or alpha-MnO2. The application can control the reaction environment and then provide an excellent nucleation growth environment for oxidized manganese, and the effect is remarkable.

This invention belongs to the field of mine water treatment in metal mines, and specifically relates to a method for the deep purification treatment of thallium-containing metal mine wastewater. This method employs a combined process of "multi-element synergistic oxidation adsorption + composite sulfide precipitation + staged flocculation precipitation + activated carbon deep adsorption." It utilizes the synergistic effect of potassium permanganate, sodium hypochlorite, and ozone as a ternary oxidant to catalyze oxidation, generating MnO2 colloids with high adsorption capacity. This strongly adsorbs thallium, preventing its reduction rebound and amplifying the subsequent treatment effect through adsorption enrichment. Further treatment with a compound sulfide agent and a core-shell structured composite flocculant allows for multiple rounds of adsorption and precipitation, increasing the removal efficiency of low-concentration thallium to over 96%, and reducing the thallium concentration in the effluent to below 0.1 μg / L.

The application discloses a sintering oxidation catalyst for high-ratio magnetic concentrate and a use method thereof, which is composed of a sintering oxidizing agent and a sintering catalyst, and the preparation raw materials of the oxidizing agent include, in terms of weight fractions, 30-55 parts of calcium peroxide, 25-45 parts of magnesium peroxide, 2-15 parts of potassium permanganate and 2-12 parts of calcium ferrite; and the preparation raw materials of the sintering catalyst include, in terms of weight fractions, 30-60 parts of dolomite, 20-40 parts of iron powder, 10-20 parts of rare earth tailings and 5-15 parts of sintering dust removal ash. The sintering oxidation catalyst is prepared, the oxidizing agent adding proportion is optimized according to the high-low ratio of iron concentrate and the poor oxidation difference of the magnetic concentrate, the oxidation reaction capacity of the iron concentrate is improved, the sintering catalyst is prepared, the combustion efficiency of the solid fuel is improved, the sintering oxidation kinetics condition of the high-ratio magnetic concentrate is improved, and the sintering production efficiency and the sinter quality are improved.

The application discloses a kind of metal ion doped magnetic medium cooperative core-shell structure wave-absorbing material and its preparation method and application.The core layer of the wave-absorbing material described in the application is iron-based material, and the shell layer is a manganese dioxide layer doped with metal ions coated on the surface of the core layer.By using a hydrothermal method to prepare magnetite nanoparticles with uniform size, and using potassium permanganate, manganese sulfate monohydrate and metal salt as reaction raw materials, the application continues to use a hydrothermal method to grow manganese dioxide doped with metal ions on the surface of the magnetite, forming a wave-absorbing material with a core-shell structure.The wave-absorbing material prepared by the application has multiple loss mechanisms such as dielectric loss, magnetic loss, internal reflection and scattering loss, has excellent wave-absorbing performance, and has a wide absorption frequency band, good impedance matching, a simple preparation method, and is suitable for continuous industrial production.

The application discloses a method for determining organic phosphorus components of high-organic-matter soil, which comprises a decoloring step: adding KMnO4 solution drop by drop into a liquid to be decolored until the liquid to be decolored is purple red, then adding ascorbic acid solution to neutralize the excessive KMnO4, completing the decoloring, and obtaining a decolored liquid. The application can oxidize and dissolve organic matters in the liquid to be measured by adding KMnO4 solution, then neutralize the excessive KMnO4 with ascorbic acid solution, so that the liquid to be measured becomes colorless and clear, and the decoloring purpose is achieved. The use of ascorbic acid to neutralize the excessive potassium permanganate can not introduce other substances into the liquid to be measured, so that other possible errors can be avoided. The application can more accurately determine various forms of Pi by KMnO4 decoloring, so that more accurate soil organic phosphorus components can be obtained.

The application discloses a copper residue-based amorphous composite material, which is prepared by the following steps: crushing and screening dried copper residue, calcining the screened copper residue at 450-550 DEG C, mixing the calcined copper residue, manganese salt and water, adding potassium permanganate solution into the mixture, uniformly mixing the mixture, heating the mixture in a water bath at 45-55 DEG C, and separating the reaction product into solid and liquid, and then washing, drying and grinding the solid to obtain the copper residue-based amorphous composite material; the material has the advantages of high specific surface area, many reaction active sites, good oxidation and adsorption performance, high metal atom utilization rate and stable structure, and can be widely applied to oxidizing and adsorbing organic arsenic; and the adsorption removal effect is good; and the application realizes resource utilization of solid waste and has great application prospect in the field of environment.

To address the low removal efficiency of ribavirin and chloroquine phosphate, two common antiviral drugs, in traditional wastewater treatment methods, this invention provides a method for treating ribavirin and chloroquine phosphate in water using ultraviolet photocatalysis. This invention removes ribavirin and chloroquine phosphate by adding a certain amount of TiO2 and KMnO4 to the water under ultraviolet irradiation. Results show that the UV / KMnO4 / TiO2 process can efficiently remove ribavirin and chloroquine phosphate, with a treatment effect far exceeding that of UV alone, UV / KMnO4, or UV / TiO2 methods, indicating a significant synergistic effect. Furthermore, since TiO2 is currently the most common photocatalytic material, and potassium permanganate (KMnO4) is a common oxidant, the UV / KMnO4 / TiO2 method is simple, readily available, and easy to implement, making it widely applicable in engineering practice.

This invention discloses a carbon / manganese dioxide / titanium dioxide / nano hollow tube and its preparation and application. The preparation method includes: (1) electrospinning using ethylene glycol, glacial acetic acid, tetrabutyl titanate and polyvinylpyrrolidone as raw materials, followed by pre-oxidation and carbonization to obtain titanium dioxide / carbon fiber; (2) etching carbon in potassium permanganate solution to obtain manganese dioxide / titanium dioxide hollow tube; (3) polymerizing manganese dioxide / titanium dioxide with dopamine hydrochloride, followed by carbonization to obtain carbon / manganese dioxide / titanium dioxide nano hollow tube. This invention uses ethylene glycol to replace methanol in the traditional process to prepare titanium dioxide / carbon fiber, and then coats the obtained hollow tube with polydopamine before carbonization. The hollow tube prepared by this process has not only more uniform material, but also better electrochemical performance.

The application provides a method for deeply removing sulfides from fuel gas, comprising the following steps: (1) removing hydrogen sulfide gas by an organic alcohol amine absorbent; (2) contacting and reacting the fuel gas after removal of hydrogen sulfide gas with an oxidizing solvent to remove methyl mercaptan, dimethyl sulfide and residual hydrogen sulfide, the oxidizing solvent comprising 1-10% of an organic alcohol amine, 0.5-20% of an organic solvent, 2-38% of an oxidizing agent, 0.2-1% of an inorganic salt, and the balance of water, the organic solvent being at least one selected from the group consisting of tributyl phosphate, dimethylformamide, N-methyl pyrrolidone and polyethylene glycol dimethyl ether; the oxidizing agent being at least one selected from the group consisting of sodium hypochlorite, sodium chlorate, potassium hypochlorite, potassium chlorate, hydrogen peroxide and potassium permanganate; the inorganic salt being sodium carbonate and / or potassium carbonate; (3) adsorbing the fuel gas after removal of hydrogen sulfide, methyl mercaptan and dimethyl sulfide by an adsorbent to remove carbonyl sulfur and carbon disulfide.

This invention provides a coal-saving agent that stabilizes and improves combustion, its preparation method, and its application, belonging to the field of coal combustion technology. The coal-saving agent provided by this invention comprises: 5-10% oxidant, 1-8% combustion improver, 5-15% catalyst, 1-5% desulfurizer, 2-4% calcium magnesium acetate, 1-4% dispersant, and the balance being water. This invention uses potassium permanganate and sodium nitrate as oxidants, which have different decomposition temperatures and can release oxygen at different temperatures and time periods, thus promoting more complete combustion of coal. It uses manganese tetroxide, cerium dioxide, and ferric chloride as catalysts, which have a synergistic effect, further promoting coal combustion and burnout. The addition of calcium magnesium acetate as an electron transfer medium lowers the activation energy, reduces the ignition temperature, and improves the burnout rate. Controlling the composition and dosage of each component enhances the coal-saving effect of the agent.

The application discloses a sludge anaerobic acid production strengthening method based on synergistic degradation of melanoid-like substances by thermal hydrolysis and potassium permanganate, which comprises the following steps: (1) screening and removing impurities from sludge, and then performing gravity sedimentation and concentration; (2) thermal hydrolysis treatment: high-temperature and high-pressure treatment, pressure relief and cooling; (3) adding potassium permanganate for oxidation, and combining with ultrasonic dispersion; (4) anaerobic fermentation: inoculating active sludge, and controlling fermentation conditions; and (5) separating and extracting short-chain fatty acids. The application realizes the synergistic effect of thermal hydrolysis and potassium permanganate, targets the degradation of melanoid-like substances generated in the thermal hydrolysis process, eliminates the inhibition of the melanoid-like substances on anaerobic microorganisms, and promotes the efficient dissolution of organic matters in sludge. The nano manganese dioxide generated by potassium permanganate oxidation serves as an electron transfer medium, further strengthens the metabolic activity of acid-producing bacteria, and the pickling recovery rate is greater than or equal to 90%. The method makes the yield of short-chain fatty acids increase by 65% (up to 456 mg / g VS), has high efficiency and environmental protection, and provides an innovative solution for sludge resource treatment.

The invention relates to a method for controlling a treatment bath for metal parts comprising titanium or a titanium alloy, the bath comprising iron. The method comprises the following steps: - taking a sample from the treatment bath, - adding a predetermined quantity of chromium(II) chloride to the sample based on the concentration of titanium or titanium alloy and iron, - continuously adding potassium permanganate, - determining the concentration of titanium and iron by potentiometry. Figure for the abstract: Fig. 6

The application provides a zinc ion battery manganese dioxide-based positive electrode material and a preparation method and application thereof, and belongs to the field of zinc ion battery material preparation, and the preparation method comprises the following steps: S1, dissolving potassium permanganate in deionized water and performing a hydrothermal reaction to obtain; S2, dissolving an imidazole compound and a water-soluble polymer in a first solvent to perform first mixing to form a solution A, and dissolving a zinc salt in a second solvent to perform second mixing to form a solution B; S3, quickly pouring the solution A in the step S2 into the solution B to perform third mixing to obtain a precursor; and S4, performing high-temperature calcination on the precursor in the step S3 under an inert atmosphere, and obtaining the manganese dioxide-based positive electrode material after cooling. The electrode material structure is adjustable, the hydrothermal and calcination process operation is simple, the equipment requirement is low, high specific capacity and super-long cycle life are exhibited in a button cell, the process method is simple and low in cost, and the process method is suitable for large-scale popularization and industrial production.