742 results about "Perchloric acid" patented technology

A method for measuring chromium content in a laterite nickel ore, comprising the following steps: S1, adding in sequence nitric acid, phosphoric acid, perchloric acid, and sulfuric acid to a laterite nickel ore sample to be measured, and mixing evenly to obtain a mixed solution A; S2, when the amount of nitric acid is not 0, heating the mixed solution A to remove water and nitric acid, and then raising the temperature to remove perchloric acid, to obtain a mixed solution C; when the amount of nitric acid is 0, heating the mixed solution A directly to remove water and perchloric acid, to obtain a mixed solution C; S3, cooling the mixed solution C, adding water to dilute, boiling again to dissolve salts, cooling, filtering, and diluting for use, and recording as a mixed solution D; and S4, testing the mixed solution D by ICP to calculate the chromium content in the laterite nickel ore. By using nitric acid, phosphoric acid, perchloric acid, and sulfuric acid to perform redox reaction and combining the same with ICP to perform testing, the problems of few process sample testing and analysis methods, long detection time, and complicated procedures in the hydrometallurgy of laterite nickel ore are solved.

The invention discloses a low-temperature zinc ion battery high-entropy eutectic electrolyte and a preparation method and application thereof, and relates to the field of batteries, the electrolyte comprises a hydrogen bond donor, a hydrogen bond acceptor and a solvent; the hydrogen bond donor is at least one of methyl sulfonamide, thioformamide, butyramide, asparagine, tert-butylamine, dimethyl propane diamine, oxalyl diamine, benzamide, sulfamide and ethyl sulfonamide; the hydrogen bond receptor is at least one of aspartic acid, glutamic acid, methionine, zinc chloride, zinc perchlorate, zinc fluoborate and zinc acetate; the preparation method comprises the following steps: mixing a hydrogen bond donor and a hydrogen bond acceptor, and heating to convert a solid into a liquid phase; and adding a solvent, and uniformly mixing to obtain the product. The invention also provides a zinc ion battery containing the electrolyte. The high-entropy eutectic electrolyte has the beneficial effects that-NH2 and halogen or carboxyl form hydrogen bonds to perform eutectic reaction, the freezing point of the eutectic solution is lower than that of a reactant, and the solvent is added to improve the confusion degree of the electrolyte, so that the high-entropy eutectic electrolyte is prepared.

The present invention discloses a wide temperature range hydrated eutectic electrolyte and its application in aqueous zinc ion batteries. The wide temperature range hydrated eutectic electrolyte comprises a zinc salt, an alcohol organic solvent and an inorganic additive. The zinc salt is zinc perchlorate hexahydrate; the organic solvent is ethylene glycol; and the inorganic additive is an indium trichloride solution. The hydrated eutectic electrolyte prepared by the present invention enables aqueous zinc ion batteries to exhibit excellent electrochemical properties in a wide temperature range, can effectively inhibit the generation of side reactions such as dendrites and corrosion in aqueous zinc ion batteries, and thus prolong the service life of aqueous zinc ions in a wide temperature range.

The invention belongs to the technical field of electrochemical energy storage, and particularly relates to a low-temperature aqueous electrolyte for anchoring I < + > ions based on a double-coordination structure and a low-temperature four-electron aqueous zinc-iodine battery. The low-temperature aqueous electrolyte is a mixed solution of a zinc salt, an electrolyte additive and water, and the low-temperature aqueous electrolyte comprises 2-5 mol / L of the zinc salt and 0.3-0.6 mol / L of the electrolyte additive; the zinc salt is zinc perchlorate or zinc tetrafluoroborate. The low-temperature four-electron aqueous zinc-iodine battery comprises the low-temperature aqueous electrolyte. Compared with the prior art, the invention at least has the following beneficial effects: (1) the corrosion risk caused by chloride ion concentration is reduced; (2) efficient four-electron iodine positive electrode reaction is realized; and (3) obtaining the low-temperature four-electron aqueous zinc-iodine battery.

The utility model discloses a screw conveyer for perchloric acid production, which relates to the technical field of screw conveyors and comprises a conveying cylinder, a rotating rod is rotatably connected onto the conveying cylinder and is distributed along the axial length direction of the conveying cylinder, two ends of the rotating rod are respectively and fixedly connected with a first screw blade and a second screw blade, and the first screw blade and the second screw blade are arranged on the conveying cylinder. The spiral direction of the first spiral blade is consistent with that of the second spiral blade, a shake-up assembly is arranged between the first spiral blade and the second spiral blade and comprises a supporting plate and an elastic piece, the supporting plate is fixedly connected to the rotating rod, the elastic piece is fixedly connected to the end, away from the rotating rod, of the supporting plate, and the elastic piece is fixedly connected to the rotating rod. A filter plate is arranged on the side, back on to the second spiral blade, of the first spiral blade. According to the spiral conveyor for perchloric acid production, the first spiral blade, the second spiral blade, the filter plate, the shaking-up assembly and other structures are arranged, the conveying, filtering and shaking-up functions are achieved at the same time, and the machining efficiency is improved.

The invention discloses a two-dimensional metal oxide composite reduced graphene oxide burning rate catalyst, which is prepared by the following steps: uniformly grinding glucose, ammonium nitrate and transition metal nitrate, calcining at high temperature to generate a two-dimensional metal oxide nanosheet, mixing the two-dimensional metal oxide nanosheet with surfactant modified reduced graphene oxide powder, and sintering at high temperature to obtain the two-dimensional metal oxide composite reduced graphene oxide burning rate catalyst. And transferring into a high-pressure hydrothermal kettle for solvothermal reaction, so that the reduced graphene oxide and the two-dimensional metal oxide nanosheet are compounded to form the composite burning rate catalyst with a 2D-2D structure. Two two-dimensional materials are compounded through a solvothermal method, the defects of accumulation of reduced graphene oxide and aggregation of the two-dimensional metal oxide due to high surface energy are effectively avoided, meanwhile, the high conductivity of the reduced graphene oxide is utilized, the synergistic catalysis effect of the metal oxide and the carbon material is enhanced, and the performance of the composite material is improved. The composite material has a good catalytic effect on the thermal decomposition process of ammonium perchlorate.

The invention provides a determination method of an L-alaninamide hydrochloride enantiomer, which adopts an HPLC (High Performance Liquid Chromatography) method, takes a chromatographic column taking (S)-18-crown-6 ether coated silica gel as a filler as a stationary phase, and takes a perchloric acid aqueous solution as a mobile phase; the mobile phase is used for dissolving a test sample to prepare a test sample solution with the concentration not lower than 4 mg / ml. The detection method provided by the invention can be suitable for accurate quantitative analysis of D-alaninamide hydrochloride, and has the advantages of good specificity, high sensitivity, good accuracy, simple operation, no need of sample pretreatment, and accurate determination of the enantiomer D-alaninamide hydrochloride of L-alaninamide hydrochloride.

The invention discloses a preparation method and application of octahedral cuprous oxide containing defects, and belongs to the technical field of material preparation. In order to solve the problems that in existing cuprous oxide preparation, a defect structure is difficult to accurately regulate and control, and the crystal form uniformity is insufficient, the method comprises the steps that a copper source solution, a glucose solution, a sodium citrate solution and an ammonium fluoride solution with specific concentrations are mixed according to the volume ratio, the pH is adjusted to 10.5-11, then a hydrothermal reaction is conducted, and a target product is obtained through centrifugation, filtration, washing and drying. The method comprises the following specific steps: mixing solutions, reacting in a high-pressure reaction kettle at 140-165 DEG C for 4-6 hours, and realizing octahedral crystal form construction and defect regulation and control by controlling the raw material ratio and reaction conditions. The preparation method is simple in process and high in controllability, and the prepared octahedral cuprous oxide containing defects can serve as a catalyst to be applied to the fields of catalytic decomposition of ammonium perchlorate and the like and has good industrial application prospects.

The invention relates to a method for detecting high-content zinc element in ore. The detection method comprises the following steps: adding a zinc-containing ore sample into a mixture of ammonium fluoride, hydrobromic acid, hydrochloric acid, nitric acid and perchloric acid, dissolving, taking melt with hydrochloric acid to obtain a solution to be detected, drawing a zinc standard working curve, detecting the strength of the solution to be detected, and calculating the content value of the zinc element on the zinc standard working curve according to the strength value. According to the scheme provided by the invention, the operation is simple and convenient and the detection result is accurate when the high-content zinc element in the ore is detected.

The invention belongs to the technical field of drying, and relates to an ammonium perchlorate drying system and method. The drying system comprises a drying box, a hopper and a drying assembly. A connecting frame is arranged in the drying box, and the drying assembly comprises two transmission rollers rotationally mounted on the connecting frame and a drying belt wound between the two transmission rollers; a feed opening is formed in the hopper, and ammonium perchlorate in the hopper falls onto the drying belt through the feed opening; and a driving assembly is mounted on the drying box. Along with operation of the feeding roller and the drying belt, ammonium perchlorate evenly falls onto the drying belt, ammonium perchlorate accumulation is avoided, ammonium perchlorate can be continuously added to the drying belt along with drying, the drying efficiency can be improved, and dried ammonium perchlorate automatically falls into a collecting box. And the connecting frame vibrates in the length direction of the drying box and swings around the connecting column, so that the ammonium perchlorate on the drying belt is turned over, and the ammonium perchlorate is fully and comprehensively dried.

A system self-calibration method for testing granularity of spherical ammonium perchlorate by a dynamic image method relates to the field of particle granularity analysis and quality detection accuracy, and comprises the following steps: S1, calibrating an image acquisition module; s2, selecting proper standard sample particles; s3, calibrating the pixel size corresponding to the lens multiple; s4, testing accuracy self-correction verification of a dynamic image method particle size and shape analysis system is carried out, pixel accuracy calibration is optimized, and it is guaranteed that a standard particle testing result conforms to a standard particle special quantity value; and S5, establishing a dynamic image method particle size and particle shape analysis self-calibration standard curing method.

The invention discloses an ammonia borane solid propellant. The propellant takes octahydrotriboride as a fuel, ammonium perchlorate and the like as an oxidant, aluminum powder as a metal fuel and starch as an adhesive. The metal fuel and the adhesive which are good in compatibility are selected to form a propellant system, and the stability of the system is guaranteed while it is guaranteed that the system has the sufficient combustion effect.

The utility model relates to the technical field of a high-temperature combustion infrared thermal conductivity combined measurement method, in particular to a gas filtering structure of the high-temperature combustion infrared thermal conductivity combined measurement method, which comprises a mounting shell, one side of the mounting shell is communicated with a gas inlet pipe, the inner side of the mounting shell is fixedly connected with a filter screen which is arranged in an inclined manner, and the filter screen is fixedly connected with a gas outlet pipe. One side, far away from the air inlet pipe, of the mounting shell is communicated with a through pipe, the outer side of the through pipe is provided with a second valve, and the inner side of the mounting shell is fixedly connected with a positioning plate penetrating through one side of the mounting shell. One of the adsorption bottles is filled with asbestos, the other one of the adsorption bottles is filled with a magnesium perchlorate solution, solid particles in the gas are filtered out by the filter screen, then the alkali asbestos and the magnesium perchlorate solution in the adsorption bottles can adsorb CO2 and H2O respectively, and the filtered gas can flow out from the through pipe after the second valve is opened.

The invention relates to the technical field of firework preparation, in particular to a moisture-proof agent, a micro-smoke firework propellant powder and a micro-smoke firework blasting powder. The moisture-proof agent comprises the following raw materials: shellac, polyvinyl alcohol and a solvent. The micro-smoke firework propellant powder is prepared from 51-85 parts of moisture-proof ammonium perchlorate, 20-50 parts of a moisture-proof reducing agent and 65-80 parts of a moisture-proof agent. The micro-smoke firework explosive comprises 50-75 parts of moisture-proof ammonium perchlorate, 11-20 parts of a moisture-proof reducing agent and 12-22 parts of aluminum powder. The production process is simple and safe, does not need high-temperature and high-pressure processes and has high safety coefficient. The moisture-proof ammonium perchlorate is adopted as an oxidizing agent, the moisture-proof hemp stalk carbon powder and the like are adopted as a reducing agent, only a small amount of smoke is generated in the combustion process, and the ornamental effect is good. Solvent components of the moisture-proof agent can be volatilized in the drying process when the micro-smoke firework propellant powder is prepared, so that the interior of the moisture-proof agent is porous, the burning speed of the micro-smoke firework propellant powder can be increased, and a relatively simple preparation process and formula are adopted, so that the prepared firework product has better safety, environmental protection property, moisture resistance and economic benefits.

The invention provides a sample dissolving method of a nickel-based alloy, and belongs to the technical field of analytical chemistry, and the nickel-based alloy comprises the following components in percentage by mass: 0.15-0.20% of C, 0.15-0.20% of B, 0.15-0.20% of C, and the balance of Fe and inevitable impurities. Comprising the following steps: preliminarily dissolving a sample through concentrated hydrochloric acid and concentrated nitric acid; adding perchloric acid, and preserving heat for 1-2 minutes at the temperature of 100-120 DEG C to obtain a yellow insoluble substance, the ratio of the adding volume of the perchloric acid to the mass of the sample being (110-130) mL: 1g; transferring the liquid and the yellow insoluble substance into a second reaction cup, adding hydrofluoric acid, and keeping the temperature at 50-60 DEG C for 2-4 minutes; and fixing the volume after dissolving. Firstly, concentrated hydrochloric acid and concentrated nitric acid are adopted for dissolution, due to the fact that the content of Cr, Mo and W is high, and detection of Ce, Si and other metals cannot be affected, the adding mode of the concentrated nitric acid and the concentrated hydrochloric acid is limited, then perchloric acid is added, fuming of the perchloric acid is controlled, and the content of the perchloric acid and the content of the concentrated nitric acid which are added in the earlier stage are combined; the method has the advantages that low Cr content due to generation of CrO2Cl2 is avoided while metal carbides are dissolved, undissolved yellow substances are dissolved in combination with hydrofluoric acid, and low Si content due to generation of SiF4 is avoided.

The invention discloses vacancy heteropolyacid, a preparation method thereof and application of the vacancy heteropolyacid in electrolytic coupling hydrogen production, and belongs to the technical field of catalysts. The preparation method comprises the following steps: by taking phosphomolybdic acid as a raw material, preparing vacancy heteropolyacid by adjusting the pH value to 2-6 or adding high-concentration acid for acidification and heating; the high-concentration acid is 0.1-6 M phosphoric acid or a mixed acid of 0.1-3 M phosphoric acid and 0.1-6 M sulfuric acid or 0.1-1 M perchloric acid. The rate of oxidizing biomass and organic wastewater by the vacancy phosphomolybdic heteropolyacid prepared by the method is 10-20 times of that of complete Keggin type phosphomolybdic acid. The invention further provides an organic wastewater degradation and electrolytic hydrogen production coupling process, vacancy heteropoly acid can be regenerated and recycled, and coupling hydrogen production can be achieved.

The invention discloses a preparation method of ammonium perchlorate with a hollow spherical structure, which comprises the following steps: firstly, dissolving ammonium perchlorate in a high-temperature N, N-dimethylformamide solvent to form a high-temperature ammonium perchlorate saturated solution; then, adding a high-temperature saturated ammonium perchlorate solution into a low-temperature carbon tetrachloride anti-solvent at a slow feeding rate, and recrystallizing; and finally, completely crystallizing, standing, separating, washing and drying the product to obtain the ammonium perchlorate with the hollow spherical structure. The particle size of the obtained ammonium perchlorate with the hollow spherical structure is 50-100 microns, and the ammonium perchlorate is high in sphericity degree and good in dispersity. The ammonium perchlorate with the hollow spherical structure is applied to the fields of propellants, pyrotechnic compounds, thermite and the like.

The invention provides a hydrated eutectic electrolyte as well as a preparation method and application thereof. The electrolyte comprises water-soluble zinc salt, deionized water and a deep eutectic solution, the deep eutectic solution is formed by mixing zinc perchlorate and a polar deep eutectic solvent and performing deep eutectic crystallization. The electrolyte has the characteristics of low water activity, low freezing point and efficient induction of uniform deposition of zinc, can be compatible with an iodine-loaded positive electrode and can inhibit dissolution of iodine, and the characteristics are beneficial to inhibition of hydrogen evolution reaction, polyiodine shuttling and other side reactions in the battery circulation process, promote uniform deposition of zinc, protect the integrity of an iodine electrode, and improve the electrochemical performance of the battery. The stable operation of the zinc-iodine battery is ensured; the electrolyte is a zinc sulfate solution containing a ZnClO4 / dimethyl sulfoxide deep eutectic solvent, the solution is combined with free water to form a eutectic structure, the eutectic structure participates in construction of a Zn < 2 + > ion solvation shell, extra intramolecular hydrogen bonds are introduced for the electrolyte, meanwhile, hydrogen bonds among water molecules are weakened, so that the internal energy of the electrolyte is enhanced, the freezing point is reduced, and the flowability is improved.

The invention belongs to the technical field of optical glass. The invention relates to an electrochromic glass device, in particular to a preparation method of the electrochromic glass device. The preparation method comprises the following specific preparation steps: cleaning the surface of a glass substrate, and depositing an indium tin oxide transparent conductive layer on the surface of the glass substrate by adopting magnetron sputtering; the preparation method comprises the following steps: by taking nano spherical silicon dioxide as a template, dispersing the nano spherical silicon dioxide in an ethanol solution, then adding a sodium tungstate solution, then adjusting the pH value to 2-3, carrying out a stirring reaction, and then cleaning with a sodium hydroxide solution to remove the template so as to obtain a hollow spherical precursor dispersion liquid; coating the hollow spherical precursor dispersion liquid on the surface of the transparent conductive layer in a spin coating mode, drying and annealing; preparing a liquid electrolyte: taking propylene carbonate as a solvent, and taking lithium perchlorate as an electrolyte lithium salt; niO is deposited on the surface of the WO3 electrochromic layer to serve as a counter electrode through magnetron sputtering; epoxy resin is adopted to package the edge, after liquid electrolyte is injected, internal residual bubbles are removed through hot pressing, and the product is obtained.

The invention provides a medicament for treating wastewater containing perchlorate, which consists of two parts, namely a targeted remover and a guide activator, the core components of the targeted remover comprise dodecyl trimethyl ammonium chloride, dodecyl dimethyl benzyl ammonium chloride, hexadecyl trimethyl ammonium chloride, octadecyl trimethyl ammonium chloride and the like. The guiding activating agent comprises one or more of polyferric sulfate, polyferric chloride, polyaluminum ferric chloride and polyaluminum ferric silicate. The treatment agent is simple in component, a large number of perchlorate-loving ion groups contained in the treatment agent can be fully combined with perchlorate in wastewater, the perchlorate is separated out from water in a precipitation mode and then is separated and removed, and the one-step removal rate reaches 95% or above.

The invention belongs to the technical field of metal material surface treatment, and discloses a composite preparation method of an ultrahigh-resolution-rate alpha + beta phase region thermal deformation high-strength titanium alloy EBSD sample, which comprises the following steps: mechanically grinding a to-be-tested surface of the alpha + beta phase region thermal deformation high-strength titanium alloy EBSD sample; performing electrolytic polishing in an electrolytic polishing solution which is prepared from perchloric acid and absolute ethyl alcohol and is naturally cooled to room temperature, and then performing four-stage short-time ion beam etching to obtain an ultrahigh-resolution-rate alpha + beta phase region thermal deformation high-strength titanium alloy EBSD sample; and ion beam etching parameters of each stage of the four-stage short-time ion beam etching are given. The technical problem that in the prior art, a preparation method of an alpha + beta phase region thermal deformation high-strength titanium alloy EBSD sample with the ultrahigh resolution rate (the resolution rate is 98% or above) does not exist is solved.

The invention discloses a preparation method of an ammonium perchlorate microrod with a uniform morphology. The preparation method comprises the following steps: firstly, heating a triethylene glycol saturated solution of ammonium perchlorate under a room temperature condition to a preset high temperature; then adding the high-temperature ammonium perchlorate saturated solution into an acetic acid anti-solvent at a certain temperature at a certain feeding rate for recrystallization; and finally, standing, separating, washing and drying the product to obtain the ammonium perchlorate microrod. The obtained ammonium perchlorate microrod is regular in morphology, good in dispersity and uniform in size, the length is 40-60 microns, and the width is about 10 microns. The method has the advantages of being high in operability, good in repeatability, easy to industrialize and the like.

The invention relates to a method for identifying soapberry from soapberry peel based on ultraviolet-visible spectrophotometry. The method is characterized by comprising the following steps: preparing a saponin solution, adding a 5% vanillin-glacial acetic acid solution and perchloric acid, uniformly shaking, heating in a constant-temperature water bath kettle at 70 DEG C for 15 minutes, cooling in an ice-water bath for 3 minutes, adding 5mL glacial acetic acid as a solvent, and measuring the characteristic absorption spectra of the vanillin and the glacial acetic acid by adopting an ultraviolet and visible spectrophotometer. And by utilizing the obvious difference of the number, the peak pattern and the position of the characteristic peaks in the absorption spectrum, the simple and rapid identification of the two is realized. The method has the advantages that the mass of required raw materials is small, the operation is simple, the process flow is short, and the experimental conditions are easy to realize. The technology is a rapid and efficient method for identifying and identifying the pericarp, pericarp powder and pericarp extract of the Sapindus maxima and the Sapindus mukorossi.

The invention discloses a negative electrode electrolyte and an acidic tin-bromine flow battery, and belongs to the technical field of energy storage. The negative electrode electrolyte provided by the invention comprises an active substance and a supporting electrolyte, the active substance comprises tetravalent tin salt; the tetravalent tin salt is selected from at least one of tin tetrachloride, tin sulfate, tin bromide and stannate; the supporting electrolyte is selected from at least one of sulfuric acid, hydrochloric acid, perchloric acid, methanesulfonic acid, hydrobromic acid and hydriodic acid. According to the acidic tin-bromine flow battery provided by the invention, a proper tin ion ligand is selected in the negative electrode electrolyte, and the formed tin-based complex can effectively improve the redox kinetics of Sn < 4 + > / Sn < 2 + > and improve the efficiency of the tin-bromine flow battery. Besides, the modification of the negative electrode can further improve the adsorption of reactive active substances and improve the electron transfer rate, and the high specific surface area can provide more active sites, so that the reaction polarization is reduced and the battery performance is improved.

The invention belongs to the technical field of medicine analysis, and particularly relates to a method for detecting an impurity A, an impurity B, an impurity C and an impurity D. High performance liquid chromatography is adopted for detection, and chromatographic conditions are as follows: a Titank Phenyl-Hexyl chromatographic column is adopted as a chromatographic column; acetonitrile and a buffer solution with the ratio of 4: 96 v / v are used as a mobile phase for isocratic elution, and every 1 L of the buffer solution contains 8.00 g of sodium 1-octanesulfonate, 37.00 mg of EDTA-disodium, 10 mL of perchloric acid and 2 mL of phosphoric acid; the flow velocity of the mobile phase is 0.6-1.0 mL / min, the column temperature is 15-25 DEG C, the sample size is 5-15 mL, an ultraviolet detector is used for detection, and the detection wavelength is 210-220 nm; the method can detect impurities A, B, C and D in the zoledronic acid bulk drug, and can be used for quality control of the zoledronic acid bulk drug.

The invention discloses a preparation method and application of a fluorine-doped carbon material, and relates to a preparation method and application of a carbon material. The method comprises the following steps: 1, preparing a sodium fluoride solution; 2, dropwise adding perchloric acid into the sodium fluoride solution to obtain a mixed solution; 3, adding a carbon material into the mixed solution; and 4, carrying out hydrothermal reaction to obtain the fluorine-doped carbon material. By optimizing the preparation process of the fluorine-doped carbon material, the compactness and uniformity of the protective layer are realized, the corrosion resistance and cycling stability of the zinc negative electrode are remarkably improved, and an important technical support is provided for large-scale application of the water-based zinc ion battery. The prepared zinc negative electrode with the fluorine-doped carbon coating on the surface is used as a negative electrode of an aqueous zinc ion battery. The fluorine-doped carbon material prepared by the invention can effectively improve the corrosion resistance and cycling stability of the zinc negative electrode, and provides technical support for large-scale application of the water-based zinc ion battery.

The invention provides a perchlorate wastewater treatment agent which consists of two parts, namely a targeted remover and a guide activator, the core components of the targeted remover comprise octyl trimethyl ammonium chloride, trioctyl methyl ammonium chloride, benzyl trimethyl ammonium chloride, decyl trimethyl ammonium chloride, didecyl dimethyl ammonium chloride, dodecyl trimethyl ammonium bromide, dodecyl dihydroxyethyl methyl ammonium chloride, tetradecyl trimethyl ammonium chloride and the like. The guiding activating agent comprises one or more of polyferric sulfate, polyferric chloride, polyaluminum ferric chloride and polyaluminum ferric silicate. The treatment agent is simple in component, a large number of perchlorate-loving ion groups contained in the treatment agent can be fully combined with perchlorate in wastewater, the perchlorate is separated out from water in a precipitation mode and then is separated and removed, and the one-step removal rate reaches 95% or above.

The invention discloses a preparation method of large-particle-size ammonium perchlorate hollow microspheres, which is characterized in that pyridine is used as a solvent, butyl octadecenoate is used as an anti-solvent, and the ammonium perchlorate hollow microspheres are obtained by using an anti-solvent crystallization method. The particle size of the obtained large-particle-size ammonium perchlorate hollow microspheres is 100-200 microns, the sphericity degree is high, and the dispersity is good. The method disclosed by the invention is simple in preparation process, simple and convenient to operate and very suitable for large-scale production.

The low-temperature electrolyte comprises an organic solvent, a lithium salt and an additive, and the mass percentage ratio of the organic solvent to the lithium salt to the additive is (70-90): (5-20): (0.2-3); the organic solvent is composed of cyclic carbonate, chain carbonate and chain carboxylate, the mass percentage of the cyclic carbonate, the chain carbonate and the chain carboxylate is 10-20: 10-30: 10-80, the cyclic carbonate is one or two of ethylene carbonate and propylene carbonate, the chain carbonate is one or more of dimethyl carbonate, diethyl carbonate, ethyl methyl carbonate, dipropyl carbonate and methyl propyl carbonate, and the chain carboxylate is one or more of dimethyl carbonate, diethyl carbonate, ethyl methyl carbonate, dipropyl carbonate and methyl propyl carbonate. The lithium salt is one or more of lithium hexafluorophosphate, lithium perchlorate and lithium tetrafluoroborate. Compared with a single auxiliary additive, the low-temperature performance of the electrolyte can be remarkably improved by combining the amino-containing nicotinonitrile compound with the auxiliary additive according to the proportion.

The invention relates to the technical field of element detection, in particular to a method for measuring the manganese content in copper concentrate, which comprises the following steps: weighing a copper concentrate sample with the mass of m in a tetrafluoroethylene beaker, and adding a small amount of water to soak the sample; adding nitric acid and hydrochloric acid, and heating at 200-300 DEG C for 5-10 minutes; then adding perchloric acid and hydrofluoric acid, heating at 200-300 DEG C until the copper concentrate sample is completely dissolved, and cooling to room temperature; adding dilute nitric acid, and heating to dissolve the separated salt crystals to obtain a to-be-detected pre-solution; transferring the to-be-detected pre-solution to a volumetric flask, adding water to dilute the pre-solution to a scale line, and uniformly shaking to obtain a to-be-detected solution; according to the method, a nitric acid-hydrochloric acid-perchloric acid-hydrofluoric acid mixed acid digestion system is adopted, so that the manganese element in the copper concentrate is completely dissolved, and the interference of a complex matrix on manganese determination is effectively solved; by combining the high sensitivity and multi-element analysis capability of the inductively coupled plasma emission spectrometer, a linear standard curve of a manganese element characteristic spectral line and concentration is established, and the accuracy and precision of quantitative analysis are remarkably improved.