34 results about "Chloric acid" patented technology

The invention discloses an anti-drip device for hypochlorous acid disinfectant filling, comprising: a liquid discharge pipe, the liquid discharge pipe comprising a liquid inlet part and a liquid discharge part, the liquid inlet part being used for connecting an external chlorous acid disinfectant supply device, and the liquid discharge part being used for discharging a hypochlorous acid disinfectant; the valve element is arranged in the liquid discharging pipe in a matched mode, and the valve element can block one end of the liquid inlet part; the hollow valve rod is arranged on the valve element, and the hollow valve rod is connected with an external pressure air source through a hose; the driving mechanism is used for driving the hollow valve rod to move; wherein a first control valve is arranged on the hollow valve rod; an air guide groove is formed in the valve element, and the hollow valve rod is communicated with the air guide groove; a plurality of first air guide channels are evenly distributed in the valve element and communicate with the air guide groove. The anti-dripping device is good in anti-dripping effect, and waste of hypochlorous acid disinfectants can be reduced.

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 relates to the field of glass detection, and particularly discloses a method for testing the content ratio of ferrous iron to ferric iron in glass. The method specifically comprises the following steps: washing a to-be-detected glass sample, grinding into micro powder, drying, respectively taking the same amount of glass micro powder, and marking as a sample 1 and a sample 2; divalent iron can be converted into ferric iron by adding perchloric acid into the sample 1, and the test result is the content of total iron in the glass. And dimethyl silicone oil is added into the sample 2 so as to isolate air and prevent ferrous iron from being oxidized into ferric iron in the testing process to influence the experiment result. According to the method, the proportion of Fe < 2 + > to Fe < 3 + > in an unknown glass sample can be simply and quickly obtained, the result is accurate and reliable, the test period is short, and the working efficiency is greatly improved.

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 invention relates to the field of heavy metal adsorbents, in particular to a preparation method of a coal-based heavy metal adsorbent, which comprises the following steps: S1, crushing and pickling coal to obtain coal particles; s2, the coal particles and a manganese salt solution are subjected to mixed dipping, drying and pyrolysis, and a pyrolysis product is obtained; s3, adding an adhesive into the pyrolysis product to obtain coal agglomerated particles, namely the coal-based adsorbent; the manganese salt solution is at least one of manganese nitrate and manganese chlorate. According to the method, the coal is subjected to crushing and acid pickling to enlarge the adsorption area of the coal, then the coal is mixed with the manganese salt solution for dipping and pyrolysis, manganese oxide generated by manganese salt decomposition can be dispersed in coal particles in a nano-particle form, and then the binding agent, the heavy metal adsorbent and the cross-linking agent are added, so that the adsorption efficiency is further improved; therefore, the coal-based heavy metal adsorbent with excellent adsorption efficiency is prepared.

To provide a method for manufacturing a new germicidal disinfectant from sodium hypochlorite degraded during storage.SOLUTION: A method for manufacturing a new germicidal disinfectant from a solution including hypochlorite ion, chloric ion, and chloride ion, includes: a first reaction process of adding sulfuric acid to the solution and generating chlorine gas; a process of reacting the chlorine gas generated in a recovery liquid A with sodium hydroxide or calcium hydroxide and recovering it as hypochlorite ion; a second reaction process of adding sulfuric acid having higher concentration than that in the first reaction process to a reaction mother liquid after the first reaction process and generating chlorine dioxide gas; a process of reacting the generated chlorine dioxide gas with sodium hydroxide and hydrogen peroxide in a recovery liquid B and recovering it as chlorous acid ion; and a process of blending the recovery liquid A with the recovery liquid B to obtain the new germicidal disinfectant.SELECTED DRAWING: None

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.

The preparation method comprises the following steps: dissolving a certain amount of noble metal palladium chlorate or silver nitrate in a certain amount of absolute methanol to obtain a solution A; adding a certain amount of alumina powder into a certain amount of absolute methanol to obtain a solution B; adding the solution A into the solution B, and adding a certain amount of methanol solution of 1M sodium hydroxide; and centrifugally washing the obtained precipitate with absolute ethyl alcohol for 3-5 times, drying at 60-80 DEG C for 12-15 hours, and calcining in a tubular furnace at 400-500 DEG C in a hydrogen atmosphere to obtain the noble metal loaded aluminum oxide catalyst. The preparation process is simple and practical, the particle size of the noble metal Pt or Ag is reduced to dispersed single atoms, the dispersity is improved, the noble metal loading amount required by catalysis is reduced, the cost is reduced, and the prepared catalyst is stable in catalytic performance, good in activity and high in catalytic efficiency and can be commercially used.

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 invention relates to the technical field of light salt brine deep treatment for preparing potassium hydroxide through an electrolytic method, and discloses a method for removing chlorate through potassium hydroxide preparation and an operation system thereof.The method comprises the steps that firstly, light salt brine discharged in the electrolysis process is introduced into a buffer homogenizing tank, stirred and mixed, and then proportionally shunted through a two-way variable frequency pump; the raw materials are conveyed to a titanium-based electrolytic bath and a dechlorination raw material buffer tank respectively, and nitrogen is introduced into the titanium-based electrolytic bath until the oxygen content in the bath is smaller than or equal to 0.5%; and 2, starting a titanium-based electrolytic cell power supply, setting an initial cell voltage, adjusting the current density through a rectifier, and dynamically adjusting electrolysis parameters based on the free chlorine concentration in the light salt brine so as to control the hydrogen yield. According to the method for removing chlorate through potassium hydroxide preparation and the operation system thereof, generation and residual quantity of chlorate in an electrolysis system can be accurately controlled, it is avoided that chlorate in finished alkali exceeds the standard due to the fact that chlorate penetrates through an ionic membrane and enters a cathode, and the purity and the quality grade of a potassium hydroxide product are remarkably improved.

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 method for co-processing copper anode slime silver reduction waste liquid and sulfur-containing and chlorine-containing acidic waste gas. The method comprises the following steps: firstly, carrying out quenching and tempering treatment on the silver reduction waste liquid, and then carrying out gradient cooperative treatment on sulfur-containing and chlorine-containing acidic waste gas by taking the quenched and tempered liquid as an alkaline absorbent, namely, when the pH value of the quenched and tempered liquid is in different ranges, firstly treating the sulfur-containing waste gas and then treating the chlorine-containing waste gas, so that sulfur in the waste gas is converted into soluble sulfate; chlorine is converted into soluble chlorine salt, and formaldehyde in the waste liquid is converted into non-toxic formic acid or formate. Finally, the treated waste gas is emptied after being detected to reach the standard. And carrying out wastewater treatment on the liquid after absorption, and discharging after reaching the standard. According to the method, the silver reduction waste liquid has the characteristics of alkalinity and high reducibility of formaldehyde components, the sulfur-containing and chlorate-containing acidic waste gas has the oxidation characteristic, and the silver reduction waste liquid and the sulfur-containing and chlorate-containing acidic waste gas are subjected to neutralization reaction and oxidation-reduction reaction, so that the purpose of treating waste with waste is achieved, and the treatment cost of the waste liquid and the waste gas in the copper anode slime semi-wet smelting process is greatly reduced.

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.

A polishing composition for gallium oxide substrates and a polishing method, wherein the polishing composition contains silica particles, water, and polyvalent anions. The content of the polyvalent anions is 0.002 mole / liter or Jess in the polishing composition. The polyvalent anions include at least one kind of polyvalent anions selected from the group including sulfate ions, oxalate ions, citrate ions, and phosphate ions. The polishing composition for gallium oxide substrates additionally contains monovalent anions, and the content of the monovalent anions is 0.04 mole / liter or less in the polishing composition. The monovalent anions include at least one kind of monovalent anions selected from the group including nitrate ions, chloride ions, bromide ions, chlorate ions, bromide ions, acetate ions, formate ions, propionate ions, and butyrate ions. The polishing composition for gallium oxide substrates has a pH of 5.0 to 9.5 inclusive.

According to the electrolytic chlorate washing and acid preparing system provided by the utility model, the acid washing pump is arranged on the acid adding pipeline and is matched with the design of the return pipe acid adding pipeline, and the valves on the pipelines are combined for regulation and control, so that hydrochloric acid can be pumped into the acid storage tank by utilizing negative pressure generated by the Venturi tube, and an acid adding pump does not need to be additionally arranged; the hydrochloric acid solution in the electrolytic chlorine electrode can be pumped back into the acid storage tank through the acid regurgitation pipeline, the top end of the acid storage tank is provided with the first water supply pipeline and the second water supply pipeline which are used for supplying seawater and living water respectively for supplying water, and the seawater and the living water are blended with hydrochloric acid sucked by negative pressure for acid preparation and mixing. And the risks of slipping and corrosion of personnel are reduced, the working intensity of workers is reduced, and the system cost is reduced.

The application belongs to the technical field of nanometer layered materials, and particularly relates to a method for preparing layered MXenes materials by using chloric acid etching, wherein the MAX phase material is etched by using chloric acid, the chloric acid is an oxygen-containing acid and has strong acidity, the influence of a fluorine-containing etching agent on the performance of the material can be avoided, meanwhile, the application has low requirements on equipment, short time consumption, high preparation efficiency, simple process, and the obtained layered MXenes material is in the form of large flakes, and the average side length of the flakes is 1.5-2.0 mu m.

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 invention provides a method for preparing high-purity perchloric acid based on a micro-reaction synthesis technology, which comprises the following specific steps: adding chloric acid into a solution containing more than 95% of CO2, and reducing the solution into dioxo-perchloric acid; the method comprises the following steps: adding water into Cl2O2 to prepare a 10-20% solution, and regulating the pH value of the solution to 1-2 by using 1: 1 hydrochloric acid; enabling the solution and a 30% hydrogen peroxide solution to enter a micro-channel reactor in two paths, and carrying out rapid oxidation-reduction reaction to produce perchloric acid; and carrying out acid separation concentration, vacuum rectification, membrane filtration and other technological processes to obtain the high-purity perchloric acid. According to the method for preparing the high-purity perchloric acid based on the micro-reaction synthesis technology, generation of side reactions is greatly reduced, production safety is high, the yield is high, energy consumption is low, production raw materials are easy to obtain, the automation degree is high, and intelligent control and continuous production can be achieved.

The application discloses a perchloric acid standard titration solution with a low freezing point and a preparation method thereof, and comprises the following steps: S1, a certain amount of perchloric acid is measured, acetic acid is injected under stirring, and the mixture is uniformly stirred to obtain a mixed solution A; S2, a certain amount of propionic acid is added to the mixed solution A under stirring, and the mixture is uniformly stirred to obtain a mixed solution B; and S3, acetic anhydride is added dropwise to the mixed solution B, the mixture is uniformly stirred, and the volume is fixed with acetic acid after cooling, and the perchloric acid standard titration solution is obtained.

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 present invention addresses the problem of providing: a polishing composition for polishing a gallium oxide substrate at a high polishing speed; and a polishing method therefor. [Solution] A polishing composition for a gallium oxide substrate, which contains silica particles, water, and multivalent anions, and wherein the content of the multivalent anions in the polishing composition is 0.002 mol / L or less. The multivalent anion is a multivalent anion including at least one type of multivalent anion selected from the group consisting of sulfate ions, oxalate ions, citrate ions, and phosphate ions. The polishing composition further contains a monovalent anion, and the content of the monovalent anion in the polishing composition is 0.04 mol / L or less. A polishing composition in which a monovalent anion is a monovalent anion including at least one type of monovalent anion selected from the group consisting of a nitrate ion, a chloride ion, a bromide ion, a chlorate ion, a bromide ion, an acetate ion, a formate ion, a propionate ion, and a butyrate ion. And the pH is from 5.0 to 9.5 (inclusive).

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.