68results about "Bromine oxygen compounds" patented technology

A positive-electrode active material for a non-aqueous electrolyte secondary battery according to the present disclosure contains a layered lithium(Li)-containing transition metal composite oxide that contains Li in the transition metal layer and more than 0.4 μmol/g and less than 25 μmol/g of iodine (I) or bromine (Br).

The production process comprises A) forming an acidic aqueous solution comprising alkali metal cations, bromide anions, and sulfamate anions; B) feeding into said aqueous solution a source of alkali metal cations and chlorine-containing bromide oxidant proportioned to keep the resultant aqueous medium acidic and to form an acidic product solution containing at least about 5 wt % of active bromine, and C) raising the pH of the aqueous product solution with water-soluble base to at least about 10.

The invention discloses a preparation method and application of flower-like BiOBr, belonging to the field of photocatalysts. The BiOBr has flower-like structure, and has favorable dispersity; and the petal thickness is 20-40nm, and the corolla diameter is 1-1.5 mu m. The preparation method comprises the following steps: measuring toluene, putting the toluene into a round-bottom flask, stirring at constant temperature, adding cetyl trimethylammonium bromide and oleic acid, and stirring for dissolution to obtain a solution A; measuring a certain amount of water, and adding HNO3 and Bi(NO3)3.5H2O to obtain a solution B; and while stirring, dropwisely adding the solution B into the solution A, continuing stirring for 12 hours, heating to 85 DEG C, refluxing for 12 hours, cooling the reaction product, separating, washing, and drying to obtain the flower-like BiOBr. The flower-like BiOBr can be used as a photocatalyst for degrading the organic pollutant rhodamine in water, and has favorable catalytic effect and high stability.

A solid-state lithium ion electrolyte is provided which contains a composite material having at least 94 mole % lithium ions as cation component and multiple anions in an anionic framework capable of conducting lithium ions. An activation energy for lithium ion migration in the solid state lithium ion electrolyte is 0.5 eV or less. Composites of specific formulae are provided. A lithium battery containing the composite lithium ion electrolyte is also provided.

A method for degrading Rhodamine B including: mixing BiOBr and Rhodamine B; and irradiating the mixture with a radiation having a wavelength of from 440 nm to 554 nm. The Rhodamine B may be in an aqueous solution. The BiOBr may be added to the aqueous solution of Rhodamine B in an amount of from 0.2 to 0.5 mg/ml. The BiOBr may have a sheet-like structure with particles having a diameter of from 3 μm to 5 μm. The BiOBr may be in a pure crystal tetragonal phase.

The invention is a process for the preparation of stabilized aqueous solutions of alkali hypobromites, which comprises reacting a concentrated alkali hydroxide aqueous solution with bromine, allowing the mixture to react, adding to the reaction product, which is a non-stabilized solution, an aqueous solution of a sulfamic compound, such as sodium sulfamate, and thus forming stabilized alkali hypobromite solution. This solution can be further stabilized by the addition of a sulfamate solution. The temperatures of all the above stages are comprised between −5 and +10° C.

The present invention uses bromide and sodium (potassium) hydroxide as raw material, makes them produce disproportionation reaction, regulates specific weight and pH value, uses hydrogen peroxide to remove free bromine, and adopts the processes of cooling and dewatering to separate sodium (potassium) bromate crude product, and makes the mother liquor undergo the processes of dewatering and concentration to obtain sodium (potassium) bromide crude product. The sodium (potassium) bromide crude product is disclosed, and undergone dthe processes of removing small quantity of sodium (potassium) bromate by using urea, filtering, dewatering, concentrating, drying and packaging to obtain sodium (potassium) bromide finished product. The sodium (potassium) bromate crude product is undergone the processes of dissolving, filtering, dewatering, concentrating, drying and packaging so as to obtain sodium (potassium) bromate finished product.

The present invention relates to a non-hazardous brominating reagent from an aqueous alkaline bromine byproduct solution obtained from bromine recovery plant and containing 25 to 35% bromine dissolved in aqueous lime or sodium hydroxide containing alkali bromide and alkali bromate mixture having bromide to bromate stoichiometric ratio in the range of 5:1 to 5.1:1 or 2:1 to 2.1:1 and a pH ranging between 8-12 and also relates to a method for borminating aromatic compounds by using the above brominating agent

A slurry composition for planarizing nickel or nickel-alloy coating on substrates, such as a nickel coating on a memory hard disk, includes at least two oxidizers, an abrasive, water, and no metal catalyst. The composition is effective for polishing nickel (Ni) and nickel alloys coatings formed in the manufacture of memory disks.

Na-rich electrolyte compositions provided herein can be used in a variety of devices, such as sodium ionic batteries, capacitors and other electrochemical devices. Na-rich electrolyte compositions provided herein can have a chemical formula of Na₃OX, Na₃SX, Na _(3-δ) M_δ/2OX and Na _(3-δ) M_δ/2SX wherein 0<δ<0.8, wherein X is a monovalent anion selected from fluoride, chloride, bromide, iodide, H⁻, CN⁻, BF₄⁻, BH₄⁻, ClO₄⁻, CH₃⁻, NO₂⁻, NH₂⁻ and mixtures thereof, and wherein M is a divalent metal selected from the group consisting of magnesium, calcium, barium, strontium and mixtures thereof. Na-rich electrolyte compositions provided herein can have a chemical formula of Na _(3-δ) M_δ/3OX and/or Na _(3-δ) M_δ/3SX; wherein 0<δ<0.5, wherein M is a trivalent cation M³, and wherein X is selected from fluoride, chloride, bromide, iodide, H⁻, CN⁻, BF₄⁻, BH₄⁻, ClO₄⁻, CH₃⁻, NO₂⁻, NH²⁻ and mixtures thereof. Synthesis and processing methods of NaRAP compositions for battery, capacitor, and other electrochemical applications are also provided.

A preparing method of an eggshell-shaped porous Bi4O5Br2 nanometer material is disclosed. The nanometer material is prepared by adoption of an ultrasonic chemical technique and heat treatment which are two process steps. The method includes fully stirring and dissolving a soluble bismuth salt, hexadecyl trimethyl ammonium bromide and deionized water which are adopted as raw materials, preparing a precursor compound by a one-pot ultrasonic chemical reaction, and subjecting the precursor compound to annealing heat treatment to obtain the nanometer material. The nanometer material is of a hollow graded structure, has a shape similar to eggshell, and is free of agglomeration and good in dispersibility. The open-end diameter of the nanometer material is 500-800 nm, and the shell thickness is about 20 nm. The surface of the nanometer material is provided with a large number of pores so that the specific surface area is large. The method is free of use of organic solvents and is clean and friendly in process. The prepared nanometer material can be used in the fields of visible light catalysis, antisepsis, and the like.

The invention provides a method for reducing bromine levels in brine solutions such as potassium chloride brine solutions. Bromide in solution is converted to hypobromite by the addition of an oxidant such as sodium hypochlorite. Hypobromite is precipitated by the addition of a metal cation such as magnesium under conditions of basic pH. The process is pH dependent such that the most efficient removal of bromine is achieved at a sodium hydroxide concentration of 90-200 mM. The pH optimum is also temperature dependent such that increased temperature lowers the optimal pH for bromide removal. The invention further provides a bromine-reduced potassium chloride product, suitable for uses in industrial applications. By the method of the invention bromine levels in a potassium chloride feed stock can be reduced by 97% or more.

Provided is a method for producing a one-liquid stabilized hypobromous acid composition which contains substantially no bromate ions, has excellent sterilization performance, exhibits almost no corrosiveness relative to metals, and displays excellent storage stability. This method for producing the stabilized hypobromous acid composition includes a step in which a reaction is induced by adding, under an inert gas atmosphere, bromine to a mixed solution including water, an alkali hydroxide, and sulfamic acid, wherein the proportion of bromine added is not more than 25 wt % relative to the total weight of the composition.

The present invention provides a stabilized hypohalous acid solution (or formulation thereof), which may be conveniently packaged for sale, or stored for later use on demand. The invention further provides methods of making the stabilized hypohalous acid solution, as well as methods of use for disinfecting mammalian tissue, including wounds and burns, disinfecting or cleansing surfaces, or treating and/or preserving food products and cut flowers, among other uses.

A cost-effective process is described for the preparation of a stable and non-hazardous brominating reagent containing 2:1 stoichiometric ratio of alkali bromide to alkali bromate. The process comprises of reacting alkaline bromine intermediate mixture, obtained from bromine recovery plant, with chlorine gas in the presence of a strong alkali to oxidize the bromide ions to bromate ions. This brominating reagent is useful for the bromination of aromatic compounds by substitutions.

A preparation method of iodate is characterized by comprising the following two steps: 1, iodic acid preparation: oxidizing refined iodine into iodic acid by using hydrogen peroxide as an oxidant, and using a small amount of nitric acid and hydracids such as chloric acid, bromic acid, and iodic acid as the catalyst for the oxidation reaction, wherein the amount of nitric acid is 1-10% of the fined iodine, the amount of hydracids is 0.5-50% of the refined iodine, the reaction temperature is 50 DEG C to 100 DEG C, and the reaction time is 4-8 h; and 2, iodate preparation: directly neutralizing the pure iodate solution obtained by step 1 by using hydrogen oxide or carbonate solution of alkali metal, wherein the reaction temperature of neutralization reaction is controlled in the range of 50-100 DEG C and the neutralization pH value is equal to 7.

Provided is a method for treating water containing cyanogen and ammonia with which cyanogen and ammonia are sufficiently decomposed even in cases where the concentration of soluble iron is high. This method for treating wastewater containing cyanogen and ammonia involves a step for oxidizing and decomposing cyanogen and ammonia by adding a chemical solution including hypobromous acid and/or hypochlorous acid to wastewater containing cyanogen and ammonia. A solution in which hypobromous acid and/or a hypobromite have/has been produced by mixing a bromide aqueous solution and a hypochlorite aqueous solution is added to wastewater containing cyanogen and ammonia. A sodium bromide aqueous solution and a sodium hypochlorite aqueous solution are mixed and added at an equimolar ratio or such that sodium hypochlorite is excessive.

A process is described for treating water, in particular for producing ultrapure water, in which a water stream is passed through a plurality of treatment stages in which inorganic and/or organic species which are present in the water are separated off, wherein an aqueous hypobromite solution is added to the water stream in at least one of the stages. Furthermore, a water treatment system for carrying out such a process is described, comprising one or more means for separating off inorganic and/or organic species from a water stream, characterized by at least one device for generating hypobromite solution, which device is connected to the water stream via at least one hypobromite feed line.

A cost-effective process is described for the preparation of a stable and non-hazardous brominating reagent containing 2:1 stoichiometric ratio of alkali bromide to alkali bromate. The process comprises of reacting alkaline bromine intermediate mixture, obtained from bromine recovery plant, with chlorine gas in the presence of a strong alkali to oxidize the bromide ions to bromate ions. This brominating reagent is useful for the bromination of aromatic compounds by substitutions.

The invention relates to an energy-conserving sodium bromate purifying method. The method includes the following steps: (1) the raw sodium bromate is dissolved; (2) barium hydroxide, chitosan and active carbon are added and then the solution is stirred and dissolved for 40 to 50 minutes to lead sulfate to be separated out in the barium sulfate salt form, the color to be absorbed by active carbon and the chitosan and heavy metals to be absorbed and chelated by the chitosan; (3) the solution is filtered; (4) the solution is cooled and stirred; (5) solids and liquid are separated under eccentric effect; (6) after the separation between solids and liquid, the liquid is replaced into the No1 reaction kettle and the steps are repeated. The method is characterized in that: dissolving degree of the sodium bromate under special temperatures is utilized to obtain the corresponding supersaturate solution and then the required product can be obtained through decoloring, impurity-removing, filtering, cooling, crystallizing and drying. Compared with the prior purifying method, the method has the advantages that second-time evaporation is avoided; water and stream can be conserved; the color of product is better, the purity is high and the like. The method is ideal for the bromate purification in the modern industrial manufacturing.

The invention relates to a photochromic lens capable of blocking ultraviolet rays, and a preparation method and an application thereof. The preparation method comprises the following steps: preparinga photochromic nanometer material which can block ultraviolet rays and has a general formula of MaObXc, wherein M, O, X, a, b and c are as defined in the specification, and mixing the photochromic nanometer material with an optical resin material used for preparing a lens for molding so as to obtain the photochromic lens, or coating the photochromic nanometer material onto the surface of a moldedlens to form a protective layer so as to obtain the photochromic lens. The photochromic lens prepared by using the preparation method provided by the invention can block 80% or more of ultraviolet rays, especially can become a transparent dark color to reduce transmittance when strong light irradiates, and can restore to a colorless transparent state when no strong light irradiates. The preparation method provided by the invention has the characteristics of simple process flow, low cost, large yield, applicability to industrial production, good practical prospects, etc.

The invention relates to a continuous preparation method of a photoinitiator. The method comprises the following steps: in a pipeline reaction system, methyl phenyl sulfone and a sodium hypobromite solution are subjected to a reaction in a pipeline reactor preferably according to the equation shown in the description, and phenyl tribromomethyl sulfone is prepared. The preparation method is simpleand high in production efficiency, and production cost is reduced; meanwhile, the product has stable quality and higher purity; the technical process is short, the safety is high, and the method is suitable for large-scale continuous industrial production. Part of sodium hypobromite is replaced with sodium hypochlorite, so that environmental protection is realized and production cost is reduced.