12 results about "Chlorate ion" patented technology

This invention relates to the field of automatic control technology, specifically to a method for stabilizing and controlling the effective chlorine content of sodium hypochlorite solution. During the cooling stage of the sodium hypochlorite solution, an online electrochemical sensor acquires the concentration signal of free trace metal ions in the solution. When the signal reaches a preset threshold of the controller, the controller instructs a peristaltic pump to add a compound stabilizer to the solution. The compound stabilizer is prepared by mixing a specific short peptide containing cysteine ​​and histidine with a silicate buffer solution. After adding the compound stabilizer, the solution undergoes short-term ultrasonic cavitation treatment. This method uses a specific short peptide instead of traditional aminopolycarboxylate salts, avoiding the breaking and failure of carbon-nitrogen bonds under strong oxidizing conditions, preventing secondary release of metal ions that could trigger catalytic decomposition, extending the effective chlorine half-life, and reducing the amount of chlorate byproducts generated.

The invention relates to a method for synergistically removing impurity iron in a zinc sulfate solution through ultrasonic-enhanced multi-class oxidants, and belongs to the technical field of hydrometallurgy solution purification. The method comprises the following steps: heating a Fe < 2 + >-containing zinc sulfate solution to 60-95 DEG C, adding a strongly acidic oxidant, uniformly mixing, adding a neutralizer to regulate the pH value of the solution to 2.5-4.0, and carrying out ultrasonic reinforcement and initial rapid oxidation; adding a steady-state chlorate oxidizing agent, uniformly mixing, and continuously oxidizing in the middle stage of ultrasonic enhancement; and adding a free radical source oxidant, uniformly mixing, carrying out ultrasonic-enhanced last-stage deep oxidation, synchronously carrying out ultrasonic induction to generate goethite in situ, crystallizing, and carrying out solid-liquid separation to obtain goethite slag and iron-precipitated liquid. According to the method, external goethite crystal seeds do not need to be added, the goethite is generated through induced neutralization and hydrolysis, and the iron removal rate reaches up to 99.99%. Compared with a traditional process, the iron removal rate is increased by 12.49%, the iron content in the goethite slag is increased by 3.92%, and the water content is reduced by 11.05%.

The invention relates to a qualitative and quantitative method for liensinine perchlorate. The qualitative method comprises the following steps: weighing 1mg of liensinine perchlorate and 1mg of liensinine, uniformly grinding and tabletting the liensinine perchlorate and the liensinine with 100mg of potassium bromide respectively, acquiring an infrared spectrum of 4000-400cm <-1 > by adopting an infrared spectrometer, and comparing spectrograms to find that the peak shapes of the liensinine perchlorate and the liensinine are similar, the peak shapes of the liensinine perchlorate and the liensinine perchlorate are common characteristic peaks and the peak shapes of the liensinine perchlorate are unique characteristic peaks of the liensinine perchlorate and the liensinine are common characteristic peaks and the peak shapes of the The quantitative method comprises the following steps: weighing a series of liensinine perchlorate reference substances with different masses, uniformly grinding and tabletting the liensinine perchlorate reference substances and 100mg of potassium bromide respectively, collecting an infrared spectrum, carrying out integration on a 625cm <-1 > characteristic peak to obtain a peak area, and drawing a standard curve by taking the peak area as a vertical coordinate and taking the sampling mass of the reference substances as a horizontal coordinate; the method comprises the following steps: weighing a sample to be detected, collecting an infrared spectrum, integrating a 625cm <-1 > characteristic peak to obtain a peak area, substituting the peak area into the standard curve equation, calculating the mass of the liensinine perchlorate in the sample, and substituting the mass into the content calculation formula to obtain the content of the liensinine perchlorate in the sample. The method is good in precision, repeatability and stability, wide in linear range, high in linear correlation coefficient and high in recovery rate, the problem that liensinine interference cannot be avoided in an existing content determination method is effectively solved, whether liensinine perchlorate is generated or not can be qualitatively judged, and the quantity of liensinine perchlorate generated can be quantitatively detected; and a feasible new method is provided for production process optimization and quality evaluation of liensinine perchlorate.

The invention relates to an adsorption coagulation treatment method for perchlorate wastewater. The method comprises the following steps: reducing the turbidity of the wastewater by using activated carbon as a pretreating agent; capturing perchlorate radicals through a hydrolysate by adopting polyaluminum chloride as a coagulant; then potassium permanganate and manganese chloride tetrahydrate are subjected to an oxidation-reduction reaction to generate nascent state manganese dioxide in situ; the nascent state manganese dioxide and the polyaluminum chloride hydrolysate form a composite floc through a bonding effect, and perchlorate is removed through an adsorption-coagulation synergistic effect. According to the treatment method disclosed by the invention, on the basis of the volume of the wastewater, the dosage of each component is as follows: 0.1-0.5 g / L of activated carbon, 30-45 mg / L of polyaluminum chloride, 20-80 mg / L of potassium permanganate and 40-160 mg / L of manganese chloride tetrahydrate. The invention relates to an adsorption and coagulation treatment method for perchlorate wastewater, which is used for treating perchlorate wastewater generated in industries such as military industry, spaceflight and firework production.

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 invention relates to the technical field of food detection, and particularly discloses a method for determining chlorate and perchlorate in lactoferrin through high performance liquid chromatography-tandem mass spectrometry. The method comprises the following steps: adding an isotope internal standard into a lactoferrin sample, dissolving with an ammonia water solution, precipitating protein with acetonitrile, carrying out ultrasonic extraction, centrifuging, and taking supernate; purifying by a PRiME HLB solid-phase extraction column, filtering by a regenerated cellulose filter membrane, discarding primary effluent, and collecting liquid to be detected; a pentafluorophenyl chromatographic column is used for separation, a formic acid-containing aqueous solution and acetonitrile are used for gradient elution, an electrospray anion mode is combined with multi-reaction monitoring detection, and an isotope internal standard method is used for quantification. The method adapts to characteristics of a lactoferrin exclusive matrix, protein precipitation is thorough, matrix interference can be effectively reduced, the extraction recovery rate and detection accuracy of a target object are improved, separation and detection stability is excellent, pollutants can be accurately quantified, and a reliable detection means is provided for safe management and control of lactoferrin raw materials.

The invention belongs to the technical field of electrochemical wastewater treatment, and relates to a Sm diatomic electrocatalyst, a preparation method thereof and a method for treating oxysalt wastewater. The catalyst takes nitrogen-doped carbon as a carrier, and Sm-Sm diatomic sites are anchored in a carbon skeleton in an atomic scale manner through Sm-N coordination. The preparation method comprises the following steps: self-assembling Sm2O3 and a nitrogen-containing organic matter in a buffer solution to obtain a precursor, carrying out high-temperature carbonization in an inert atmosphere, and then carrying out acid etching to remove redundant oxides so as to obtain the high-density Sm diatomic site. The catalyst is loaded on a conductive substrate as a cathode, and negative potential is applied to an aqueous solution containing nitrate, bromate and / or perchlorate, so that the nitrate can be efficiently reduced into nitrogen, the bromate and the perchlorate are reduced into corresponding halide ions, and the catalyst is prepared. The catalyst has the advantages of hydrogen evolution reaction inhibition, high oxysalt removal rate, good target product selectivity, excellent stability and the like.

The invention relates to a qualitative and quantitative method for isoliensinine perchlorate. The qualitative method comprises the following steps: weighing 1mg of isoliensinine perchlorate and 1mg of isoliensinine, uniformly grinding and tabletting the isoliensinine perchlorate and the isoliensinine with 100mg of potassium bromide respectively, acquiring an infrared spectrum of 4000-400cm <-1 > by adopting an infrared spectrometer, and comparing the spectrograms to find that the peak shapes of the isoliensinine perchlorate and the isoliensinine are similar, the peak shapes of the isoliensinine perchlorate and the isoliensinine perchlorate are common characteristic peaks and the peak shapes of the isoliensinine perchlorate are unique characteristic peaks of 625cm <-1 >. The quantitative method comprises the following steps: weighing a series of isoliensinine perchlorate reference substances with different masses, uniformly grinding and tabletting the isoliensinine perchlorate reference substances and 100mg of potassium bromide respectively, collecting an infrared spectrum, carrying out integration on a 625cm <-1 > characteristic peak to obtain a peak area, and drawing a standard curve by taking the peak area as a vertical coordinate and taking the sampling mass of the reference substances as a horizontal coordinate; the method comprises the following steps: weighing a sample to be detected, collecting an infrared spectrum, integrating a 625cm <-1 > characteristic peak to obtain a peak area, substituting the peak area into the standard curve equation, calculating the mass of the isoliensinine perchlorate in the sample, and substituting the mass of the isoliensinine perchlorate in the sample into the content calculation formula to obtain the content of the isoliensinine perchlorate in the sample. The method is good in precision, repeatability and stability, wide in linear range, high in linear correlation coefficient and high in recovery rate, the problem that an existing content determination method cannot avoid interference of isoliensinine is effectively solved, whether isoliensinine perchlorate is generated or not can be qualitatively judged, and the amount of isoliensinine perchlorate generated can be quantitatively detected. And a feasible new method is provided for production process optimization and quality evaluation of the isoliensinine perchlorate.

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 belongs to the technical field of energetic compounds, and discloses an AB2X5 type heat-resistant energetic material based on multi-ion assembly and a preparation method of the AB2X5 type heat-resistant energetic material, and the energetic material is methylamine ethylenediamine perchlorate and has an AB2X5 type crystal structure. The preparation method comprises the following steps: dissolving ethidene diamine and methylamine in a solvent in proportion, slowly adding perchloric acid with the same mole number as the total mole number of amine at the low temperature of-10 to 20 DEG C, reacting, filtering, washing with water at low temperature, leaching with ethanol, and drying to obtain the product. The decomposition temperature of the material reaches 330 DEG C, and the material is low in hygroscopicity, simple in synthesis process and suitable for the fields of heat-resistant energetic materials and solid propellant oxidants.

The application discloses a treatment method for improving ion membrane method chlorate decomposition capacity. Chlorine-containing dilute brine, which is exchanged by a chlorate heat exchanger, is mixed with hydrochloric acid in a static mixer, and then is introduced into a chlorate decomposition tank for decomposition. The dilute brine after decomposition in the chlorate decomposition tank is pumped into a dechlorination tower by a chlorate pump. Chlorine gas generated after the decomposition of the chlorine-containing dilute brine in the chlorate decomposition tank is removed through a gas phase pipeline to a chlorine gas main pipe. In abnormal conditions, a chlorine gas removal system is used. Through process control parameter optimization adjustment of the chlorate decomposition device, adjustment of the acid adding process and operation, the chlorate content at the outlet of the chlorate decomposition tank can be reduced to below 2g / L, the decomposition rate is increased to above 90%, and the dilute brine treatment capacity is increased to 8-10m 3 / h.