195 results about "PERMANGANATE ION" patented technology

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 comprises a process of preparing a non-conductive substrate for subsequent metalization. The process replaces the traditional chromic acid etching step with an etching solution comprising a permanganate and a mineral acid. The process also includes a novel activation solution comprising a palladium salt and an amine complexor. The new process of the invention is more environmentally friendly than the traditional chromic acid etching solutions but achieves a comparable result on most non-conductive substrates.

The invention supplies a new type adsorbent--mixed oxide of iron and manganese / diatomite preparation, use and regeneration method, belongs to the treatment of technology. The method used the soluble ferrous permanganate and salt as raw materials, respectively prepared the solutions, after adequate lye into permanganate solution, mixed two salt solutions, by adding diatomite particles, full oscillation, standing aging, neutralize, washing and drying to get the manganese oxide / silicon algae absorbent. The adsorbent is larger than the surface area and good adsorption properties can be used to remove arsenic in water pollutants (especially tervalence arsenic), and the adsorption surface activity of the saturated absorption of pollutants can be directly passed to load manganese oxide compound to regeneration.

The invention provides a manganese dioxide/carbon nanocomposite and a preparation method and application thereof. The preparation method comprises the following concrete steps: mixing an aqueous solution of permanganate, a carbon carrier and an aqueous solution of a divalent manganese salt; carrying out a reaction to produce a precipitate; and carrying out washing and drying so as to obtain the manganese dioxide/carbon nanocomposite. The preparation method has the advantages of easiness, rapidness, environment friendliness and easy realization of scale-up synthesis. The prepared manganese dioxide/carbon nanocomposite is applicable to a super-capacitor, a metal-air battery and a fuel battery.

Processes for the reduction and/or removal of permanganate reducing compounds (PRC'S) formed by the carbonylation of methanol in the presence of a Group VIII metal carbonylation catalyst to produce acetic acid are disclosed. More specifically, processes for reducing and/or removing PRC's or their precursors from intermediate streams during the formation of acetic acid by said carbonylation processes are disclosed. In particular, processes in which a low boiling overhead vapor stream from a light ends column is subjected to a distillation to obtain an overhead that is subjected to an extraction to selectively remove and/or reduce PRC's from the process is disclosed. The processes include steps of recycling one or more return streams derived from the distillation step and/or the extraction step to a light ends column and/or a drying column in order to improve water control in the overall reaction system.

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.

This invention relates to processes for producing acetic acid and, in particular, to improved processes for recovering C₂₊ alkyl halides and removing permanganate reducing compounds formed during the carbonylation of methanol in the presence of a Group VIII metal carbonylation catalyst to produce acetic acid.

Disclosed is a method of controlling a separation process for removing moving permanganate reducing compounds from a process stream in the methanol carbonylation process for making acetic acid, where the method includes the steps of measuring the density of a stream containing acetaldehyde and methyl iodide, optionally calculating the relative concentrations of acetaldehyde and methyl iodide in the stream, and adjusting distillation or extraction process parameters based on the measured density or one or more relative concentrations calculated therefrom.

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.

An improvement of the methanol carbonylation process for manufacturing acetic acid is disclosed. Specifically disclosed is a method for removing permanganate reducing compounds (“PRC's”) from the condensed light ends overhead stream, including (a) distilling at least a portion of the condensed light ends overhead to yield a PRC enriched second overhead stream; (b) extracting the second overhead stream with water and separating therefrom an aqueous stream containing PRC's; and (c) returning at least a portion of the extracted second overhead to the second distiller.

A process for removing contaminants from a waste gas stream comprises treating the waste gas stream to remove at least one of SO₂ and NO_x and to obtain a lean stream having a reduced level of at least one of SO₂ and NO_x and, contacting the lean gas stream with a mercury absorbent solution comprising permanganate to remove mercury vapour and to obtain a mercury lean stream and a mercury rich absorbent solution. The mercury rich absorbent solution may be subsequently treated on a batch basis to remove precipitated manganese dioxide and obtain a solution containing mercury ions.

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.

Opiates, amphetamines, barbiturates and other drugs such as benzodiazepines are extensively abused or misused and are frequently the cause of death by overdosing. These drugs are also prone to oxidation and the final degradation products depend on the reactants and the reaction conditions. This invention describes the use of inactivating agents such as permanganates, peroxides, persulfates, bismuthates, periodates or other oxidants in a dosage form as an approach to minimize abuse and overdose. The product is designed such that the inactivating agent is released if there is an attempt to extract the drug from the formulation or in cases of overdose. Once released, the inactivating agent quickly degrades the drug and converts it into inactive compounds. Since the reactants (drug and inactivating agent) are incompatible in situations of normal drug usage, they are kept separated within the vehicle of the invention, but released for interaction in case of misuse. A catalyst may be included in the formulation to facilitate the reaction.

The invention relates to a method for synthesizing an OMS-2 manganese oxide octahedral molecular sieve. By special solvent properties and reductibility of an ionic liquid, the OMS-2 manganese oxide octahedral molecular sieve with specific appearance and physicochemical performance can be synthesized. During the synthesis process, the ionic liquid is used as a reaction medium and a reducing agent to be uniformly mixed with permanganate and sylvite; crystallization is carried out at a certain temperature for a certain time; and washing and drying are then carried out to obtain the OMS-2 manganese oxide octahedral molecular sieve. The manganese oxide octahedral molecular sieve can be used as a catalyst for a plurality of selective oxidation reactions.

A chemical for removing pollutants from drinking water contains perferrite, permanganate and assistant. It features strong catalytic oxidizing action for destroying oraganic substances.

The invention provides a high-capacity positive electrode active material capable of sufficiently exploiting the excellent characteristics of magnesium metal or the like as a negative electrode active material, such as high energy capacity; a method for producing the same; and an electrochemical device using the positive electrode active material. A positive electrode 11 includes a positive electrode can 1, a positive pole pellet 2 having a positive electrode active material and the like, and a metal mesh support 3. A negative electrode 12 includes a negative electrode cap 4 and a negative electrode active material 5 such as magnesium metal. The positive electrode pellet 2 and the negative electrode active material 5 are disposed so as to sandwich a separator 6, and an electrolyte 7 is injected into the separator 6. The positive electrode active material, which provides the feature of the invention, is synthesized by a step of reacting a permanganate, such as potassium permanganate, with hydrochloric acid preferably having a concentration of 3 to 4 mol/l to produce a precipitate, and a step of filtering the precipitate, thoroughly washing the filtered precipitate with water, and then subjecting the washed precipitate to heat treatment preferably at a temperature of 300 to 400° C. for not less than 2 hours, thereby giving a manganese oxide.

A battery is described. The battery includes an anode, a cathode, a separator disposed between the cathode and the anode, and an electrolyte. The electrolyte further includes manganese. The manganese is selected from the group consisting of: cesium permanganate (CsMnO₄), cesium manganate (Cs₂MnO₄), magnesium permanganate (Mg(MnO₄)₂), magnesium manganate (MgMnO₄), silver manganate (Ag₂MnO₄), silver permanganate (AgMnO₄), barium manganate (BaMnO₄), and barium permanganate (Ba(MnO₄)₂).

The invention relates to a preparation method of a manganese oxide supported normal temperature catalyst and application. The method comprises the following steps: adding a carrier into water to washthe carrier, and then filtering and drying the carrier; adding an additive into a permanganate aqueous solution, and uniformly stirring, so as to obtain a mixed solution, feeding the washed carrier into the mixed solution, then performing stirring reaction at normal operation, filtering and drying, so as to obtain the manganese oxide supported normal temperature catalyst; the manganese oxide supported normal temperature catalyst is used for removing formaldehyde pollutant in the air through catalytic oxidation. The formed manganese oxide supported normal temperature catalyst can efficiently and thoroughly remove formaldehyde at normal temperature, does not produce secondary pollutants, such as by-products, and achieves deep purification to polluted air. In addition, the method has the advantages that the preparation technology and equipment are simple and convenient to operate, the reaction conditions are mild, and the cost is low, and is easy for industrial production, and popularization and application.

The present invention discloses a method for detecting an oxidable contaminant in an aqueous sample. The method comprises that: a sample reacts with a certain amount of excess permanganate, an excess reducing agent is added, and the residue reducing agent reacts with an indicator at a room temperature so as to detect the amount of the oxidable contaminant in the sample. The invention further discloses a kit for detecting an oxidable contaminant in an aqueous sample.