68 results about "Sodium permanganate" patented technology

The permanganate ion and an alkaline earth metal base of calcium and / or magnesium are distributed into the soil by a means of mechanical mixing to destroy contaminants in the soil and groundwater by chemical oxidation. The disclosed method produces a stable, post-treatment, manganese dioxide precipitate that does not adversely effect the ground water with high dissolved manganese concentrations. The permanganate salts may include potassium, magnesium or sodium permanganate, and the preferred alkaline earth metal bases may include calcium oxide, calcium hydroxide, magnesium oxide and magnesium hydroxide. Dolomite quick lime may be used to supply an inexpensive source of the desired calcium and / or magnesium base. The calcium and / or magnesium base may be added before, during or after the addition of the permanganate salt.

The invention relates to the technical field of pollution repairing and treatment of organic pollutants in soil, and especially discloses a chemically repairing method used in soil polluted by nitrobenzene, nitrochlorobenzene and the like. By means of the method in which the nitrobenzene, the nitrochlorobenzene and the like are firstly reduced into phenylamine which is easy to oxidatively degrade with zero-valent iron and finally the degraded product is oxidized to generate carbon dioxide and water, the soil, which is polluted by the organic pollutants including the nitrobenzene and the like, is completely repaired and removal efficiency of the organic pollutants is increased. The method can achieve a removal rate of the nitrochlorobenzene being 88.3-95.8%, wherein the nitrochlorobenzene is a difficultly-degraded organic substance. The method can overcome problems of low removal efficiency, high medicine cost and troublesome follow-up treatment during removal of the nitrobenzene-series organic pollutants in the soil with Fenton reagents, potassium persulfate, sodium permanganate and the like which are common in the prior art. By means of an indirectly oxidative degradation in which reduction is carried out firstly and oxidization is carried out after that, usage amount of an oxidizing agent can be reduced and the removal rate of the nitrobenzene-series organic pollutants can be increased. Meanwhile, the method is simple in operation and can avoid secondary pollution to environment by the oxidizing agent. The method can effectively achieve in-situ repairing of polluted soil and is especially suitable for complete repair of the soil severely polluted by the organic pollutants in local factory removal.

The invention belongs to the technical field of preparation of cobalt manganese oxide and discloses a preparation method of layered cobalt manganese double-metal oxide as well as a product thereof. The preparation method comprises the following steps: (a) mixing water-soluble cobalt salt containing divalent cobalt and water-soluble manganese salt containing divalent manganese uniformly to form a precursor aqueous solution, adding the precursor aqueous solution into an alkaline aqueous solution of potassium permanganate or sodium permanganate, and mixing, stirring and reacting to generate precipitate; and (b) filtering out the precipitate, performing hydrothermal reaction, performing suction filtration and washing on the product after reaction, removing the residual solvent and drying to obtain the needed layered cobalt manganese double-metal oxide. By the preparation method, the obtained layered cobalt manganese double-metal oxide has uniform shape, enables cobalt and manganese elements to be precipitated uniformly and highly, has large specific surface area and has excellent methylbenzene catalytic combustion cavity; furthermore, the preparation method is simple, simple in requirement on equipment, low in raw material price, low in preparation energy consumption, high in repeatability and suitable for popularization and application.

The invention discloses a preparation method of a manganese dioxide / carbon-based flexible electrode material. The method comprises steps of (1) cleaning and drying a flexible carbon substrate; (2) carrying out dipping acidification treatment of the treated carbon substrate by using mixed acid; wherein the mixed acid is formed by mixing concentrated nitric acid and concentrated sulfuric acid according to the volume ratio of 1:1-1:6; (3) preparing 10-1000mM metal salt aqueous solution, wherein the metal salt is at least one of potassium permanganate, sodium permanganate, lithium permanganate, barium permanganate and zinc permanganate; (4) putting the carbon substrate treated in the (2) into metal salt solution, and carrying out ultrasonic treatment for 20-60 minutes; (5) heating the mixturesubjected to ultrasonic treatment in the (4); and (6) naturally cooling the product subjected to heating treatment to room temperature, washing, and carrying out vacuum drying to obtain the manganesedioxide / carbon-based flexible electrode material. The preparation method is advantaged in that manganese dioxide is firmly attached to a surface of the flexible carbon substrate, can be used for a flexible supercapacitor, and has relatively high specific capacity and good cycling stability.

The invention belongs to the field of chemical industry, and relates to a method for producing sodium permanganate. The method comprises the following steps of: adding water into sodium fluosilicate and potassium permanganate serving as raw materials to perform reaction at the temperature of between 70 and 95 DEG C to obtain the sodium permanganate, performing heating concentration, cooling and filtration on crude solution to obtain 50 to 52Be sodium permanganate concentrate, and diluting the sodium permanganate concentrate to obtain 40.0 to 40.5 percent sodium permanganate solution product. The production method generates the sodium fluosilicate in one step without adopting chlorine oxidation, so the production method is safe and environment-friendly; the product has good quality, and particularly has low chloride content; the reaction is finished under normal pressure, and the reaction conditions are easy to control; and the method has the advantages of simple production process, short flow and no three-waste discharge.

Media for selectively removing radium ions from water where manganese oxide (DMO) has been dispersed in a cation ion exchange resin (gel or macroporous) to adsorb radium ions. The media is manufactured by precipitating a soluble manganese (II) salt such as manganous sulfate with a permanganate salt such as sodium permanganate inside a strong acid cation (SAC) to form a resin containing highly dispersed manganese oxides. The resin is then post treated with a reducing agent such as sodium metabisulfite (Na2S2O2) to prevent the leaching of soluble manganese from the resin. The reducing treatment ensures that soluble manganese species will be converted into an insoluble oxide form.

The invention relates to a method for removing arsenic from an industrial hydrofluoric acid. The method comprises the following steps: firstly, inexpensively, efficiently and accurately calculating the quantity T2 of potassium permanganate to be consumed for removing arsenic out of anhydrous hydrogen fluoride by utilizing a small quantity of samples and the accuracy of a titration result in a sampling titration mode; then adding a potassium permanganate solution of which the adding quantity is 1.45 to 1.55 times as much as T2; and reacting the potassium permanganate solution with the anhydrous hydrogen fluoride in which the arsenic needs to be removed. The experimental result shows that although the hydrofluoric acid obtained by the reaction based on the current adding quantity contains slightly excessive potassium permanganate (existing in the forms of manganese ion and potassium ion), the potassium permanganate in the hydrofluoric acid can be completely removed through rectification and purification; and the content of the arsenic in the finally obtained hydrofluoric acid is below 100ppt (Parts Per Trillion), thereby completely reaching the requirement of the electronic-grade hydrofluoric acid.

The invention discloses a domestic garbage environmentally friendly renewable fuel and a manufacturing method thereof, and belongs to the technical field of renewable energy. The domestic garbage environmentally friendly renewable fuel is prepared from the following raw materials according to the percentage of the total weight of the raw materials: 93.7-96.5% of domestic garbage, 0.1-0.3% of sodium dichloroisocyanurate, 0.2-0.4% of urea, 0.1-0.2% of sodium bicarbonate, 0.1-0.3% of glycerin, 0.2-0.3% of trisodium phosphate, 0.2-0.4% of sugar, 0.4-0.6% of sodium permanganate, 0.2-0.4% of a carbon powder, 0.2-0.4% of sodium chloride, 0.2-0.3% of a graphite powder, 0.1-0.3% of ammonium nitrite, 0.1-0.3% of a manganese powder, 0.1-0.3% of zinc oxide, 0.1-0.3% of anhydrous sodium sulphate and 1.2-1.5% of water. The renewable fuel has the advantages of high heat value, low pollution, good combustion performance and easy storage.

The invention discloses an evaporator and method for preventing a heating chamber from being blocked during evaporation and concentration of sodium permanganate. The evaporator disclosed by the invention comprises a material mixing tank, a feeding pump, a circulation pipe, a forced circulation pipe, a heating chamber, an evaporation chamber, a forced circulation pump and a discharging pump, as well as a sand inlet device connected with the material mixing tank and a sedimentation tank connected with the discharging pump, wherein the circulation pipe is divided into a main circulation pipe and an auxiliary circulation pipe; the feeding pump is connected with the main circulation pipe, the upper end of the main circulation pipe is communicated with one side of the evaporation chamber, the lower end of the main circulation pipe is communicated with the lower end of the heating chamber through the forced circulation pipe, and the upper end of the heating chamber is communicated with the other side of the evaporation chamber; and the lower part of the evaporation chamber is communicated with the upper end of the auxiliary circulation pipe, and the lower end of the auxiliary circulation pipe is connected on the forced circulation pipe and communicated with the forced circulation pipe. The evaporator disclosed by the invention has the advantages of preventing the heating chamber of the evaporator from being blocked, effectively improving the production efficiency and reducing energy consumption and power consumption.