20 results about "Chloric acid" patented technology

A quantitative detection method of thallium content in converter graphite ball, steps include: 1) the pretreatment of converter graphite ball; 2) the preparation of standard solution series; 3) the detection of thallium content in converter graphite ball.The application finds that the suitable pretreatment method of converter graphite ball is carbon removal by burning, and then high-chloric acid and dilute nitric acid are used to dissolve salt, by which the converter graphite ball can be completely dissolved, thereby the stability of quantitative determination of thallium content in converter graphite ball is improved, the pretreatment method is simple, fast and operable; the method is suitable for the quantitative detection of thallium content in converter graphite ball with thallium content not less than 0.0062 μg / L, the recovery rate of thallium is as high as 99.1%, the analysis accuracy is high, the detection lower limit is as low as ppb level, the sensitivity is high, and the method has the advantages of simple operation, simple analysis condition and low labor intensity.Therefore, the application has significant economic benefits and the advantages of simplicity and economy.

The invention discloses an electric power oil washing device and an electric power oil purification treatment system and method. The electric power oil washing device comprises a washing oil tank, a circulating spraying unit, a waste liquid discharging unit and a first oil liquid discharging unit. The washing oil tank is used for inputting and accommodating oil and water for electric power to be treated; the first end of the circulating spraying unit is connected with the side part and / or the bottom of the washing oil tank, the second end of the circulating spraying unit is connected with the top of the washing oil tank, and the circulating spraying unit is used for conveying a mixed solution of to-be-treated electric oil and water to the top of the washing oil tank and spraying downwards; the waste liquid discharging unit is arranged at the bottom of the washing oil tank; and the first oil liquid discharging unit is arranged at the bottom of the washing oil tank. According to the invention, the distribution and precipitation characteristics of chlorine, pickling substances and oil sludge and the characteristic that additives in oil are insoluble in water are utilized, water is used for dissolution, the problem that chlorine cannot be effectively removed is solved, most acidic substances and part of oil sludge are removed by means of water, the cost is reduced, and the problem of secondary pollution in the treatment process is avoided.

The utility model discloses a reactor of chlorine dioxide generator relates to chlorine dioxide preparation technical field, including multistage reaction unit of intercommunication, and the liquid communication pipe and the gas communication pipe are communicated between adjacent reaction unit, and the first stage reaction unit is connected with the feed dynamic mixer, and the last stage reaction unit is connected with the disinfectant outlet pipe and the disinfectant gas outlet pipe. The reactor can realize gas, liquid branch circuit operation in use, make the chlorine dioxide in the reaction liquid in time from the reaction liquid to the gas phase space of reactor, then from disinfectant gas outlet pipe, prevent the chlorine dioxide from the disproportionation reaction and generate chlorate in liquid phase, to improve its reaction effect, raw material conversion rate, chlorine dioxide purity improves obviously, prevented the occurrence of disproportionation reaction.

This invention provides a copper etching solution, its preparation method, etching method, and application. The copper etching solution comprises 1-30 parts cerium ammonium sulfate, 0-20 parts inorganic acid, 0-20 parts organic acid, and 0-90 parts water. The inorganic acid includes one or more of sulfuric acid, phosphoric acid, hypochlorous acid, chloric acid, boric acid, carbonic acid, nitric acid, nitrous acid, and hydrochloric acid. The organic acid includes one or more of citric acid, acetic acid, tartaric acid, malic acid, formic acid, propionic acid, butyric acid, isobutyric acid, valeric acid, isovaleric acid, oxalic acid, malonic acid, succinic acid, glutaric acid, adipic acid, glycolic acid, acrylic acid, methacrylic acid, lactic acid, gluconic acid, maleic acid, benzoic acid, and salicylic acid. The copper etching solution of this invention exhibits good etching properties for copper and minimal damage to nickel-chromium alloys.

The invention belongs to the technical field of welding and hot dipping, and particularly relates to a copper alloy / copper plate strip hot dipping flux and a preparation method thereof. The plating assistant provided by the invention comprises the following components in percentage by mass: 5-15% of brominated salt, 5-15% of chloro-free acid, 5-15% of organic alkali, 3-5% of surfactant and the balance of solvent. According to the invention, the surfactant is added into the plating assistant, so that ion aggregation and growth are inhibited, the surface tension is reduced, the binding force between the tin coating and a copper alloy / copper plate strip is improved, the uniformity of the hot-dip tin coating is obviously improved, and the uniform and bright tin coating with the thickness of 0.8-10 microns and the thickness tolerance of + / -0.6 microns can be obtained through one-time dip plating.

The invention relates to a chemical recovery technology of waste polyester, and provides a decolorization method of waste polyester alcoholysis liquid. The waste polyester is subjected to alcoholysis in ethylene glycol, part of ethylene glycol is removed under reduced pressure, the mass ratio of ethylene glycol to BHET is (1.5-4): 1, water and a hydroxyl carboxylic acid / hydroxyl carboxylic acid salt buffer system are added, the pH is adjusted to 4.5-6.5, a chlorite decolorizing agent matched with the content of ethylene glycol in alcoholysis liquid is added at the temperature of 100-140 DEG C in a segmented mode for decolorizing, and the waste polyester is obtained. And then reducing residual high-valence chloride anions by adopting a combination of sodium hydrogen sulfite and ascorbic acid, removing inorganic anions through strong-basicity anion exchange resin, and finally crystallizing to obtain the high-whiteness and high-purity BHET. The method has the advantages of low oxidant consumption, high decolorization efficiency, substantial reduction of chlorate residue, and reduction of side reactions.

The present application relates to the technical field of deep treatment of brine for preparation of potassium hydroxide by electrolysis, and discloses a method and operation system for removing chlorate produced in preparation of potassium hydroxide by ion-exchange membrane electrolysis, step one: introducing the brine discharged from the electrolysis procedure into a buffer homogenizing tank, mixing after stirring, proportionally shunting through a double-path variable frequency pump, and respectively conveying to a titanium-based electrolytic cell and a dechlorination raw material buffer tank, the titanium-based electrolytic cell being supplied with nitrogen until the oxygen content in the cell is ≤0.5%; step two: starting the power supply of the titanium-based electrolytic cell, setting the initial cell voltage, adjusting the current density through a rectifier, and simultaneously dynamically adjusting the electrolysis parameters based on the free chlorine concentration in the brine to control the hydrogen production. The method and operation system for removing chlorate produced in preparation of potassium hydroxide by ion-exchange membrane electrolysis can accurately control the generation and residual amount of chlorate in the electrolysis system, avoid the chlorate from passing through the ion-exchange membrane into the cathode to cause the chlorate in the finished product to exceed the standard, and significantly improve the purity and quality grade of the potassium hydroxide product.

The present application relates to waste polyester chemical recycling technology, provide a kind of waste polyester alcoholysis liquid decolorization method.Waste polyester is alcoholized in ethylene glycol and removes part of ethylene glycol under reduced pressure, so that the mass ratio of ethylene glycol and BHET is 1.5-4:1, water and hydroxyl carboxylic acid / salt buffer system are added, pH is adjusted to 4.5-6.5, and decoloring agent of chlorite salt matching with the ethylene glycol content of alcoholysis liquid is added in stages under 100-140 DEG C to decolor, then sodium bisulfite and ascorbic acid combination is used to reduce residual high-valence chlorine anion, and inorganic anion is removed by strong alkaline anion exchange resin, and finally high whiteness, high purity BHET is obtained by crystallization.The method has low oxidant dosage, high decoloring efficiency, can significantly reduce chlorate residue and reduce side reaction.

A composition for semiconductor processing includes polishing particles, water, and a biocide. The biocide includes a first biocide and a second biocide, the first biocide includes a thiazolinone-based compound, and the second biocide includes a chloric acid-based compound.

The application relates to a carbon-based liquid-liquid separation membrane and a preparation method and application thereof. First, a controllable oxidation method is adopted, graphite or carbon nanotubes and other carbon materials are oxidized by potassium permanganate in a high-chloric acid or chlorosulfonic acid aqueous solution, then a vacuum filtration method is adopted to uniformly deposit the oxidized carbon materials on the surface of a filter membrane, thus an excellent liquid-liquid separation membrane is obtained. The separation membrane can be used for efficient separation of a mixed liquid or emulsion of a polar solvent and a non-polar solvent, has a series of remarkable advantages such as simple method, high separation efficiency, repeated use and the like, and has a good market application prospect.

The invention discloses a preparation method of a molybdenum disulfide-gold nano composite material based on ice bath and ultrasonic stripping, and belongs to the technical field of nano enzymes. Molybdenum disulfide powder and a dispersion stabilizer are dispersed and subjected to ultrasonic stripping treatment, and suspension liquid is obtained; carrying out gradient centrifugal separation on the suspension to obtain a precipitate; dispersing the precipitate in ultrapure water, carrying out ultrasonic treatment, adding a surfactant, and uniformly stirring to obtain a mixed solution; and heating the mixed solution, slowly dropwise adding a gold chlorate aqueous solution, carrying out a first reaction and a second reaction, and then carrying out gradient centrifugation to obtain the composite material. Through cooperation of the molybdenum disulfide nanosheets and the gold nanoparticles, the gold nanoparticles are loaded on the surfaces of the molybdenum disulfide nanosheets, and the gold nanoparticles improve the stability of the molybdenum disulfide nanosheets, so that molybdenum disulfide is not easy to decompose in water. Due to the surface plasma resonance effect of the gold nanoparticles, the gold nanoparticles have high photothermal conversion rate and have better photothermal effect than single molybdenum disulfide, so that photothermal therapy is realized.

The present invention provides technology for the long-term preservation of the scientific quality of the chlorine peroxy radical (ClOO·), which is the main active ingredient of chlorous acid water, through the suppression of water molecule vibration. Provided is a method for producing a frozen product of a chlorine peroxy radical solution, the method comprising: (1) preparing a solution containing the chlorine peroxy radical; and (2) freezing the solution containing the chlorine peroxy radical. The method comprises cooling the solution to -20°C or below. Also provided is a frozen product of a chlorine peroxy radical solution produced using the above method.

The present application belongs to the field of pearl processing, and relates to a pearl bleaching method based on phase transfer catalytic oxidation. Pearl grains are soaked in a potassium chlorate aqueous solution, cleaned, air-dried, and oven-dried. The oven-dried pearl grains are soaked in an 18-crown-6 alcohol organic solution, bleached until decolorization is complete, the pearl grains are removed, cleaned after being soaked in clean water, and dried to obtain finished products. The present application pre-permeates the oxidant potassium chlorate without oxidation capacity into the pearl layer and deposits it between the pearl layers, and then uses an organic phase containing crown ether (18-crown-6) to dissolve the potassium chlorate into the organic phase through complexation, so that the chlorate ion produces oxidation, and the pigment is oxidized. The present application can keep the bleaching oxidation degree of the pearl surface layer and the pearl deep layer from being greatly different, avoids the problem that the pearl layer surface is excessively oxidized and the pearl deep layer has insufficient oxidation capacity during the bleaching process, and has the advantages of simple process, simple operation, and good bleaching oxidation effect.

The application relates to the field of luminescent materials, in particular to a terbium stannum chlorate and a preparation method thereof. The preparation method of the terbium stannum chlorate comprises the following steps: taking stannous chloride dihydrate and a terbium salt as precursors, dissolving the precursors in a solvent at room temperature to form a solution A; performing spin coating on a substrate to form a film, and heating to obtain a terbium stannum chlorate film based on the substrate. The method has the advantages of simple preparation process, low requirement on equipment, high controllability, less heat budget in the preparation process, and excellent photoluminescence performance of the product.

The invention belongs to the technical field of waste lithium battery recycling, and particularly relates to a method for efficiently and jointly recycling a waste lithium battery material. The oxidation potential of the acidic materials is larger than the standard electrode potential of manganese dioxide and smaller than the standard electrode potential of trivalent nickel or cobalt, high-valence nickel and cobalt can be reduced into divalent nickel and cobalt through the used acidic materials, and divalent manganese ions can be reserved in leaching residues in the form of high-valence manganese such as manganese dioxide; the purpose of separate separation and extraction of the manganese element in the manganese-containing raw material is achieved, meanwhile, manganese slag is used for replacing an oxidizing agent, the lithium iron phosphate positive electrode material is oxidized through the strong oxidizing property of high-valence manganese under the ball milling condition, lithium is efficiently and preferentially extracted, water leaching is used for replacing traditional acid leaching in the waste lithium iron phosphate positive electrode material recycling process, acid use is reduced, and the cost is reduced. The lithium element of the lithium iron phosphate positive electrode material is selectively and preferentially extracted, the process is simple, and the lithium yield is high.

The application discloses a kind of H2S gas concentration detection methods based on metal organic framework-gold nanoparticle colorimetric gel patch.In hot gel solution,metal organic framework solution,metal chloric acid solution are added and uniformly mixed,drop mixed solution into mould,after cooling,de-mould,place in H2S gas environment,photograph before and after response to extract color information change and then judge to obtain concentration.The application is simple to prepare,can be completed in 10min,improves the anti-interference ability of gas sensor to environmental humidity,improves the sensitivity of sensor,realizes the practical application in meat product packaging,realizes freshness detection under non-destructive condition.

The present application relates to the field of electricity storage, and particularly relates to a liquid low-temperature molten salt electrolyte, which comprises anhydrous aluminum chloride, an organic ammonium halide and an inorganic salt additive, the organic ammonium halide is one of tetra-substituted alkane halide, tri-substituted alkane halide or di-substituted alkane halide, the inorganic salt additive is one or more of sodium chloride, potassium chloride and lithium chloride, and the substituent group can be an alkane group, an alkene group or an aromatic hydrocarbon group. The electrolyte of the present application adds the inorganic salt additive, increases the conductivity of the electrolyte, the battery using the electrolyte has an ion channel for only anion passing, optimizes the conduction path of the chloro chlorate complex ion, limits the improper migration of the cation, improves the selective conduction of the anion, reduces the capacity loss in the charging and discharging process, and improves the capacity retention rate of the battery.

The present invention provides a composition having an excellent dissolving ability for a transition metal-containing substance and a method for treating a substrate. The composition according to an embodiment of the present invention contains at least one oxohalogen acid compound selected from the group consisting of hypochlorous acid, chlorous acid, chloric acid, bromic acid, and salts thereof and a compound represented by Formula (1), in which a content of the compound represented by Formula (1) is 1.0% to 25.0% by mass with respect to a total mass of the composition.

This application relates to the field of hydrometallurgical zinc refining technology, specifically to a copper salt dechlorination recycling process for a hydrometallurgical zinc refining production line. In this process, after the zinc oxide raw material is neutrally leached to obtain a secondary leaching solution, chloride ion removal and copper salt recycling are achieved through a cyclic treatment process of "dechlorination-acid washing-alkali washing-rinsing-regeneration-copper precipitation-oxidation-copper leaching". Furthermore, an automated control system is added to the recycling process. Through real-time data acquisition and dynamic analysis of control deviations, the proportional parameters of the PI controller in the copper salt dechlorination recycling process of the secondary leaching solution are adjusted to improve the stability of dechlorination effect for different batches.

The objective is to provide a method for producing an aqueous solution containing chlorous acid that is safe for human use, easy to handle, and generates little chlorine dioxide, for use as a disinfectant in pre-treatment for food processing. [Solution] A method for producing an aqueous solution containing chlorous acid, which is safe for the human body, easy to handle, and generates little chlorine dioxide, for use as a pre-treatment disinfectant for food processing. Chloric acid is generated by adding sulfuric acid or an aqueous solution thereof in an amount and concentration that can maintain the pH value of the aqueous solution between 2.3 and 3.4 to an aqueous sodium chlorate solution and reacting the two, and then adding an amount of hydrogen peroxide equal to or greater than the amount required for the reduction reaction to the chloric acid to produce chlorous acid.