193 results about "Permanganate salt" patented technology

The invention relates to an air purification material and a preparation method and application thereof, belonging to the technical field of chemical catalytic decomposition, in particular belonging to the technical field of decomposition of formaldehyde pollutants in environment air. The air purification material comprises a base material and manganese oxide, wherein the manganese oxide is supported on the base material, the base material is honeycomb ceramics or a fiber material with a particle filtering function, and the manganese oxide is birnessite manganese oxide prepared from permanganate and oxalate. The air purification material can effectively decompose formaldehyde pollutants in indoor air and can rapidly and constantly remove the formaldehyde pollutants in indoor air at room temperature. The air purification material can be regenerated through heating, so that the service life of the material is prolonged and the practical application is facilitated.

The invention relates to an air cleaning material, and a preparation method and an application thereof, and belongs to the technical field of chemical catalytic decomposition. The air cleaning material comprise a base material and a manganese oxide loaded on the base material; the manganese oxide is a birnessite type manganese oxide prepared by performing in-situ reduction on a permanganate and a reducing agent; and the base material is filter cotton, non-woven fabrics, cotton cloth, gauze, or fiber with particle filtering function. The preparation method comprises the following steps: step 1, dissolving a quaternary ammonium salt and the permanganate in water, adding the base material; step 2, adding the reducing agent into the solution obtained in the step 1, mixing uniformly; step 3, heating the solution obtained in the step 2 at a constant temperature; and step 4, taking out the base material and drying to obtain the finished product. According to the technical scheme, the manganese oxide is simple loaded on the fiber material base material such as filter cotton and the like, so that the obtained low-wind-resistance cleaning material is capable of continuously rapid degrading formaldehyde and ozone in the air at room temperature; and the preparation method of the air cleaning material is simple and low in cost, and no other pollutions are introduced.

The invention discloses a water treatment method for removing Tl<+> and/or Cd2<+> by producing nanometer iron and manganese oxides in situ, relating to a water treatment method of thallium and/or cadmium-containing source water and solving the problems of complex process, high running cost and low removing efficiency of thallium and/or cadmium existing in the conventional water treatment technology specific to thallium and/or cadmium-polluted source water. The method comprises the following steps of: adding permanganate and ferrous salt into Tl<+> and/or Cd2<+>-containing water; stirring to obtain a mixed solution; adding a coagulant; and performing conventional water treatment. A nanometer ferric hydroxide-manganese dioxide oxide composite adsorbent which has a large specific surface area and high electronegativity and is easy for precipitation separation is produced in situ by making permanganate react with the ferrous salt, so that Tl<+> and/or Cd2<+> can be removed effectively andspecifications in the national Sanitary Standard for Drinking Water are met. The method has the advantages of high removing efficiency, simple process, flexibility and convenience for operation, no change of the original treatment process of a water plant, low running cost and the like, and can be applied to emergency treatment of a water pollution event.

A process for the preparation of graphite oxide from graphite using a permanganate salt and an aqueous sulfuric acid solution. The graphite oxide may be further reacted to form graphene sheets.

The invention provides a preparation method of a cerium-manganese molecular sieve catalyst, comprising the steps of adding permanganate solution into a solution containing a divalent manganese sourceand a cerium source, and adding an acid to adjust pH to obtain a reaction solution; adding the reaction solution into a reactor, and allowing hydrothermal reaction to occur to obtain the cerium-manganese molecular sieve catalyst, wherein the addition of the reaction solution account's 30-80% by volume of the reactor. The cerium-manganese molecular sieve catalyst is prepared by a one-step hydrothermal process; by adjusting the reaction parameters, particularly filling rate of the reaction solution, ozone decomposition catalytic activity is improved; the ozone conversion rate under the normal temperature of 30 DEG C, space velocity of 600000 h<-1> and relative humidity of 45% may reach 95% and above; the catalyst herein has long life, up to 20 days and longer; the cost of the catalyst is greatly reduced; the preparation method is simple and feasible and can provide filling rate index for the industrial production of catalysts.

The invention provides a special gold dissolving agent for a gold ore. The special gold dissolving agent is prepared by reacting and mixing carbonate or bicarbonate, hydroxide, permanganate, perchlorate, persulphate, ammonium salt, sodium ferrocyanide or potassium ferrocyanide. The gold dissolving agent has the advantages of rapidly dissolving metal gold, selectively leaching gold from various gold ores, being low in toxicity and the like.

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 discloses a nanometer manganese dioxide sponge, and a preparation method and an application thereof. The method comprises the following steps: (1) permanganate and oxalate are added to water in order to obtain a reaction solution I; (2) nano-sponge is added to the reaction solution I, is soaked and taken out, and undergoes a hydrothermal reaction at 80-120 DEG C for 2-7 h to obtain apreliminarily in situ grown manganese dioxide nano-sponge, and a solution obtained after the soaking and taking-out is a reaction solution II; and (3) the preliminarily in situ grown nanometer manganese dioxide sponge is soaked in the reaction solution II, is taken out, and undergoes a hydrothermal reaction at 80-120 DEG C for 5-12 h, and the obtained reaction product is purified to obtain the nanometer manganese dioxide sponge. The 3D nano-sponge is used as a template to efficiently load nanometer manganese dioxide, so the preparation method is simple, the material utilization rate is high,and the load rate reaches up to 220%; and the prepared catalytic material can effectively degrade formaldehyde with a low concentration (1.4 ppm), and the degradation rate reaches up to 90%.

The invention discloses a manufacturing method of a FeSi magnetic powder core. The manufacturing method includes adding trace elements Ni or Co on the basis of FeSi and preparing FeSi powder by means of aerosol, wherein the composition includes 5-7% of Si, 0.1-1.5% of Ni or Co, and the balance of Fe. The manufacturing method adopts permanganate as passivator, epoxy resin and phenolic resin mixture as binder, and the Fesi magnetic powder core manufactured has the advantages of excellent direct-current bias characteristics, low magnetic loss, high density, smoothness, good formability and the like.

Belonging to the field of water treatment, the invention relates to a high efficiency composite coagulant for water treatment. The composite coagulant consists of the following materials by mass: 90-99% of an aluminum salt coagulant, 0.1-10% of permanganate, and 0.5-8% of an auxiliary agent. Potassium permanganate, an aluminum salt flocculant and an auxiliary flocculating agent are compounded in certain proportion to obtain a high efficiency water treatment flocculant. The auxiliary flocculating agent is utilized to improve the oxidation ability and reaction speed of potassium permanganate, strengthen the flocculation aiding effect, and improve the reaction efficiency and speed of ordinary inorganic flocculants. Through optimization of the proportion of the potassium permanganate, the aluminum salt flocculant and the auxiliary flocculating agent, on the one hand, the flocculation aiding capacity of the potassium permanganate and the auxiliary flocculating agent can be exerted to the utmost, thus enhancing the efficiency of removing organic pollutants, algae and turbidity by the coagulant, eliminating the precursors of disinfection by-products in water, improving the water quality and saving reagents; and on the other hand, the residual problem of potassium permanganate can be solved.

The invention discloses a composite water treatment agent. The composite water treatment agent consists of 0.3 to 45 weight parts of permanganate, 0.3 to 45 weight parts of ferrate, 1 to 10 weight parts of sodium silicate or 0.1 to 1 weight part of periodate, and 10 to 30 weight parts of sodium hydroxide or potassium hydroxide based on the weight of pypocholoride solution at the mass percent concentration of 10 to 30 percent. According to the composite water treatment agent, permanganate is combined with ferrate, the synergistic effect between the permanganate and the ferrate is fully exerted, the defects of the permanganate and the ferrate are eliminate, the capacity of removing ammonia nitrogen, organic matter, manganese ions, odor and chromaticity in water is enhanced, a water treatment effect is greatly improved, and water treatment cost is reduced. The prepared mixed solution can be stored stably for a long time, a process is simple, and the agent is convenient to use, and improves water treatment safety.

The invention relates to a preparation method and application of an air purifying material, belonging to a preparation technique of a metal composite functional material. The method comprises the following steps: carrying out degreasing treatment on an aluminum or aluminum alloy substrate until the surface is completely wetted by water; dissolving a permanganate in water, stirring until the permanganate is sufficiently dissolved, adding an aid ammonia water or urea, and stirring and mixing uniformly; putting the treated aluminum substrate into a mixed solution, and heating the aluminum substrate in a thermostatic water bath; and finally, taking out the aluminum substrate material, washing and drying. The preparation method has the advantages of simple preparation technique and low cost, and can easily implement large-scale production. The manganese oxide is firmly loaded on the aluminum substrate surface, thereby obviously enhancing the purifying effect on formaldehyde in indoor air. The air purifying material can quickly degrade formaldehyde in the indoor air at room temperature; and the aluminum substrate can be heated to further enhance the formaldehyde purifying property, thereby ensuring the long-time use of the catalyst.

This invention relates to an insulating resin composition which exhibits high impact resistance and heat resistance and good adhesiveness to the plating metal, is selectively etchable by a permanganate salt commonly used in a plating operation and suited for an insulating layer in multilayer wiring boards. The insulating resin composition is a photo polymerizable or thermally polymerizable resin composition comprising 3-10 parts by weight of a crosslinked elastic polymer per 100 parts by weight of a resin component (excluding the crosslinked elastic poly and including monomers) and said crosslinked elastic polymer has carboxyl groups and is dispersed with an average secondary particle diameter in the range of 0.5-2 mum.

The invention relates to an iron-manganese modified coconut shell biochar material and a preparation method and application thereof. The iron-manganese modified coconut shell biochar material is obtained by modifying coconut shell biochar with soluble iron salt and soluble permanganate, the preparation method of the material comprises the following steps: (1) respectively dissolving the soluble iron salt and the soluble permanganate in water, uniformly mixing, and adjusting the pH value to obtain a mixed solution; (2) adding coconut shell charcoal into the mixed solution obtained in the step (1) to obtain turbid liquid; (3) carrying out ultrasonic dispersion on the turbid liquid obtained in the step (2), heating, evaporating to dryness, then putting into a muffle furnace, modifying in an inert gas atmosphere, cooling, washing and drying to obtain iron-manganese modified coconut shell charcoal; the material can efficiently passivate the bioavailability of Cd and As in soil, prevents andcontrols the absorption and accumulation of Cd and As by rice, and has a good remediation effect on Cd and As combined polluted soil.

A multi-parameter water quality detection method comprises the steps as follows: (1) preparing a standard solution, (2) creating a standard curve, 3) sampling a sample, 4) preprocessing the sample, 5) performing experimental determination and 6) calculating permanganate index concentration, ammonia nitrogen concentration and total nitrogen concentration. A multi-parameter water quality detector comprises a main unit body provided with a storage bin and an experiment bin. According to the detection method, detection of a permanganate index, ammonia nitrogen, total nitrogen, nitrite nitrogen and nitrate nitrogen of a to-be-detected substance is realized through an absorption spectrum, the operation procedure is simplified, the on-line condition of the detector is facilitated, the defects of many required instruments and high cost of the different traditional methods are overcome, multiple parameters can be detected on line in real time by one detector, the measurement time is short, the accuracy is high, the detection limit is low, the lowest detection limit of total nitrogen is 0.5 mg/L, the lowest detection limit of ammonia nitrogen is 0.1 mg/L, the lowest detection limit of the permanganate index is 0.1 mg/L, and the detection requirements of the Quality standard for ground water and the Environmental quality standards for surface water (GB3838-2002) for total nitrogen, ammonia nitrogen and the permanganate index can be met.

The invention belongs to the technical field of catalytic materials and coatings, and discloses an antibacterial formaldehyde-removing catalytic material, and a preparation method and an application thereof. The preparation method comprises the following steps: adding a permanganate, an iron salt, an oxalate and silver nitrate into water, performing stirring for uniform mixing, carrying out a hydrothermal reaction at 70-120 DEG C, naturally cooling the obtained solution to room temperature after the reaction is finished, and separating, washing and drying the obtained solid product to obtain the powdery antibacterial formaldehyde-removing catalytic material. The antibacterial formaldehyde-removing catalytic material, titanium dioxide, a styrene-acrylic emulsion and water are stirred and mixed, assistants are added, and stirring is performed for uniform mixing to obtain an antibacterial formaldehyde-removing coating. The obtained catalytic material can be used for carrying out efficientcatalytic oxidation on formaldehyde under the condition of no light at room temperature, so that formaldehyde is degraded into harmless carbon dioxide and water. The obtained antibacterial formaldehyde-removing coating can be well smeared on artificial boards, plastic wallpaper and walls, and is safe, nontoxic and odorless. The catalytic material can quickly and safely degrade formaldehyde for along time.