208 results about "Permanganate salt" patented technology

An improvement of the methanol carbonylation process for manufacturing acetic acid is disclosed. Specifically disclosed is a method for reducing the formation of alkyl iodides and C3-8 carboxylic acids by removing permanganate reducing compounds (“PRC's”) from the light phase of the condensed light ends overhead stream, including (a) distilling the light phase to yield a PRC enriched overhead stream; and (b) extracting the third overhead stream with water in at least two consecutive stages and separating therefrom one or more aqueous streams containing PRC's.

A method for producing oxygen and absorbing carbon dioxide in a single operation using a solution that contains an oxygen source and a redox partner that can react to form oxygen and a chemical species that can form an insoluble carbonate to precipitate and chemically store carbon dioxide. Carbon dioxide is introduced into the solution and the carbonate precipitates as the oxygen is generated. In particular, the invention uses an aqueous solution of permanganate and hydrogen peroxide that react in the presence of a catalyst to produce oxygen and manganese (II) ions. Carbon dioxide gas introduced into the solution reacts with the manganese (II) ions to precipitate manganese carbonate. Other cations capable of reacting with carbon dioxide to form an insoluble carbonate, for example calcium, barium and magnesium, may also be added to the solution to precipitate carbonate salts. Calcium permanganate may used as a source of both calcium and permanganate.

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 manganese dioxide modified biochar composite material as well as a preparation method and an application thereof. The composite material is prepared from manganese dioxide and biochar by loading generated manganese dioxide on biochar through the neutralization reaction of permanganate and manganese in divalent manganese salt. The manganese dioxide modified composite material has the advantages of high adsorption capacity for heavy metal lead or cadmium, obvious adsorption effect, low preparation cost and the like, and is an ideal heavy metal wastewater adsorbent; thepreparation method of the composite material has the advantages of simple process, cheap raw materials, sufficiently used raw materials, low production cost and the like. The manganese dioxide modified composite material can be used for treating heavy metal wastewater, and has the advantages of high adsorption capacity for heavy metals, high adsorption efficiency, low toxicity to organisms in theenvironment and the like, and can be produced and applied on a large scale.

The present invention discloses a chromium-free treatment liquid for preparing corrosion resistant oxidation film at aluminium alloy surface as well as the processing and use method thereof, characterized in that said treatment fluid utilizes a cobalt (III) salt as a main salt and a hypermanganate and a nitrate as a composite oxidizing compound to prepare a composite Co-Mn oxidation film having favorable corrosion resistance performances at aluminium alloy surface. The formula for said treatment liquid is that each litre solution contains cobalt salt of 5 g / L(-1)-20 g / L(-1), kalii permangana of 1 g / L(-1)-4 g / L(-1), sodium nitrate of 1 g / L(-1)-4 g / L(-1), promotor (chlorides and fluorides) of 1 g / L(-1)-4 g / L(-1), sodium acetate of 20 g / L(-1)-50 g / L(-1) and wetting agents (sodium dodecylbenzene sulfonate, OP-10) of 0.5 g / L(-1)-1 g / L(-1). Saic processing and use method comprises (1)sanding the aluminium alloy until its surface is smooth and even; (2) pretreating the aluminium alloy surface; (3) performing a conversion processing by using the treatment fluid; (4) cleaning-up using water and atmospheric-drying naturally. Said treatment fluid in accordance with the present invention possesses the advantages of environmental protection due to its hexavalent chromium-free, fast film-forming speed, simple process, uniform rete, strong corrosion resistance, few environment pollution, and the like.

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 zinc or zinc / alloy surface of a metal artifact is protected by passivating or activating the surface with a solution comprising an oxidizing acid or activating acid; applying to the surface an aqueous priming solution of an alkali metal permanganate in the presence of halogen ions, with the solution having a pH of about 1 to 8; and then further applying to the surface an aqueous sealing solution such as a lithium silicate and a sodium or potassium silicate solution. Strong corrosion protection can be achieved. Improvements may also be obtained with the addition of a rare earth salt to the priming solution.

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 discloses a water treatment method for adsorbing and removing Tl<+> and / or Cd2<+> by producing nanometer manganese dioxide 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 sodium thiosulfate into Tl<+> and / or Cd2<+>-containing water; stirring to obtain a mixed solution; adding a coagulant; and performing conventional water treatment. Nanometer manganese dioxide 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 sodium thiosulfate, so that low-concentration Tl<+> and / or Cd2<+> in water can be removed effectively and specifications 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.

The invention discloses a permanganate index on-line monitoring automatic titration determination method and device; based on an automatic measurement flow, an end point is jointly determined with cooperation of two ways of absorbance and electric potentials, and the relationships of the changes of the solution absorbance and the electric potentials with the titration volume are simultaneously used in the titration determination method, staging and selective design is performed for the entire titration process, and different titration speeds are adopted in different titration stages so as to ensure the accuracy of the titration. Two conditions of the absorbance and the electric potentials are used at the same time; when the solution not only meets conditions of photometric determination ofthe end point but also meets the conditions of electrode determination of the end point during automatic titration, the titration is determined to reach the end point; through a specific titration algorithm and the determination way, the method and device solve the problems that the electric potential generates aging and drifting because a traditional photometric method is interfered by water colors, turbidity and other factors and an ORP electrode is used for a long time.

The invention provides a lanthanum-modified manganese oxide catalyst, and a preparation method and an application thereof. The preparation method of the lanthanum-modified manganese oxide catalyst includes the following steps: performing hydro-thermal treatment on a bivalent manganese salt and permanganate or persulfate to prepare manganese oxide, doping the manganese oxide with a lanthanum salt,and obtaining the lanthanum-modified manganese oxide catalyst by drying and high temperature burning treatment. The prepared lanthanum-modified manganese oxide catalyst can efficiently catalyze and decompose ozone at room temperature, and enables the time required for decomposing the ozone at room temperature to be greatly shortened compared with manganese oxide without lanthanum modification.

A manganese compound exerting a higher environmental pollutant removal performance than that of a conventional manganese oxide is provided. The manganese compound is obtained by mixing and reacting a bivalent manganese salt aqueous solution and a permanganate alkaline aqueous solution containing a quantity of an alkali larger than a stoichiometric quantity. When comparing the manganese compound with an already-known manganese oxide, it is determined that a specific surface area has significantly increased, and the environment pollutant removal performance is significantly improved. The manganese compound according to the present invention has a high specific surface area value and a high environment pollutant removal performance, and is useful in the adsorption and oxidation-removal of the odor components discharged from factories, NOx, SOx, VOC, and the unburned components such as hydrocarbons, aldehydes and the like which are generated by incomplete combustion.

Metallized polyamideimide films for use as a substrate, in which a conductive layer is adhered to a polyamideimide film at high peel strength, may be prepared in a relatively small number of steps without using a special material by treating an inorganic filler-containing polyamideimide film with an alkaline permanganate solution, and subjecting the treated surface to electroless copper plating, or successive electroless copper plating and electrolytic copper plating. Preferably, a potassium permanganate solution or a sodium permanganate solution is used as the alkaline permanganate solution.

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.

In order to regenerate permanganate solutions being utilized for the etching and roughening of plastics surfaces electrolytic methods are known. Though relatively small quantaties of by-products are produced with these methods as compared to chemical regeneration methods, large quantaties of manganese dioxide are produced when printed circuit boards are treated. In order to avoid formation of manganese dioxide during the regeneration method a novel cathode 2 has been found which is provided with a porous, electrically nonconducting layer 7 on the cathode body 3. The layer 7 preferably consists of a plastics material being resistant to acid and / or alkali.

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 permanganate index analyzer and a permanganate index analysis method. The permanganate index analyzer comprises a base, a controller, a to-be-tested sample zone, a water bathheating decomposition zone and a heat-preservation titration zone, wherein positions of to-be-tested samples are arranged inside the to-be-tested sample zone; a plurality groups of water bath heatingmodules are arranged inside the water bath heating decomposition zone; a water bath heating module is in communication connection with the controller; the heat-preservation titration zone comprises titration positions and heat-preservation modules; a magnetic stirrer is arranged below each titration position; the heat-preservation modules and the magnetic stirrers communicate with the controller;a first mechanical arm and a second mechanical arm are arranged on the base; a color sensing element and a liquid supply titration component are arranged on the second mechanical arm; the titration component, the color sensing element, the first mechanical arm and the second mechanical arm are all in communication connection with the controller. By adopting the permanganate index analyzer, the problems of low precision and low efficiency of permanganate index analysis in the prior art are solved.

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 modified manganese dioxide with high specific surface area, a preparation method and application thereof. The invention provides a preparation method of modified manganese dioxide, wherein the preparation method comprises the following steps: mixing permanganate, a divalent manganese salt and a nickel source, and carrying out hydrothermal reaction to obtain modified manganese dioxide, wherein the molar ratio of the permanganate to the divalent manganese salt is (3-10):1, and the temperature of the hydrothermal reaction is 120-200 DEG C. According to the preparation method, the temperature of a hydrothermal reaction is controlled, permanganate and divalent manganese in a specific proportion are combined as raw materials to form delta-MnO2, a nickel source is added in the reaction process for modification, the size of nanosheets of a hydrangea-shaped structure formed by connecting manganese dioxide nanosheets layer by layer is reduced, the number of the nanosheets is increased, and the whole hydrangea-shaped structure is also obviously reduced, so that the specific surface area is greatly increased, the surface oxygen content is greatly increased, and the catalytic activity is also obviously improved.

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.

A process for chemically etching a stereolithography resin involves chemically etching a shaped object of the resin at a temperature in a range of from about 20° C. to about 30° C. for a time of from about 30 seconds to about 60 seconds with a saturated aqueous solution of permanganate, for example potassium permanganate. The process is faster, simpler and uses less environmentally harmful chemicals than previous etching processes for SLA parts. Etching is also more thorough and can reach hard to access places that sand blasting cannot. The etching process may be part of a process for metallization of a rapid prototyping part fabricated by stereolithography. Excellent etch coverage leads excellent coverage by the coating metal and to stronger metal layers.

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 discloses a preparation method and application of a zero-valent iron-loaded iron-manganese oxide composite material. According to the invention, a coprecipitation oxidation-reduction method is adopted. The preparation method comprises the following steps: selecting a ferrous salt, a stabilizer and permanganate to prepare an iron-manganese oxide (FMBO) precursor, dropwise adding a reducing agent and a ferric salt into a solution containing the FMBO in a protective atmosphere, and carrying out stirring, filtering, washing and freeze-drying so as to prepare the zero-valent iron-loaded iron-manganese oxide composite material (FMBO@ZVI). The powder prepared in the invention is large in specific surface area and smooth in morphology and surface, formed by densely arranging spherical structure particles and uniform in particle size, and the atomic% of zero-valent iron (ZVI) is 50%-80%. The preparation method is simple and feasible in process and mild in reaction conditions and uses cheap and easily-available raw materials; and the prepared material has high reaction activity and reducibility, give full play to the reduction effect of zero-valent iron, and greatly enhances the degradation effect on nitrobenzene which is difficult to degrade.

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.