481 results about "Antimony" patented technology

The invention provides a preparation method of a barrier type antimonide infrared detector. The preparation method comprises the following steps: selecting a gallium antimonide substrate; a gallium antimonide buffer layer, an indium arsenide heavily-doped layer, a class II superlattice absorption layer and an aluminum-arsenic-antimony barrier layer are sequentially grown on the substrate in an epitaxial mode through a molecular beam epitaxy method; mechanically stripping the hexagonal boron nitride two-dimensional material, and transferring the stripped hexagonal boron nitride to the aluminum-arsenic-antimony barrier layer to form a Van der Waals heterojunction and composite barrier layer structure; depositing electrodes by using an ultraviolet lithography technology and a thermal evaporation mode to form one electrode arranged on the gallium antimonide buffer layer and the other electrode arranged on the boron nitride; a large-numerical-aperture micro-lens array is processed on a substrate, and the micro-lens array is composed of gallium antimonide cylinders with a phase modulation function; therefore, the antimonide medium-wave infrared detector with the composite barrier layer can be formed, the quantum efficiency is improved, the order of magnitude of dark current is reduced, and room-temperature medium-wave infrared detection can be realized.

The invention discloses a Ti / IrO2-SnO2-SbO2 gradient active coating anode with low cost and high stability and a preparation process of the Ti / IrO2-SnO2-SbO2 gradient active coating anode. The gradient active coating is characterized in that the gradient active coating is composed of 3-5 layers, the total thickness is 5-15 microns, the thickness of each layer is 1-5 microns, the molar percentage content of iridium in a bottom layer is 0-5%, the sum of the molar percentage content of tin and antimony is 95-100%, the molar percentage content of iridium in a surface layer is 10-20%, the sum of the molar percentage content of tin and antimony is 80-90%, and the thickness of each layer is 1-5 microns. The molar percentage content of iridium from the bottom layer to the surface layer is sequentially increased from 2% to 10%, the molar percentage content of tin and antimony is sequentially reduced from 2% to 10%, and the total iridium loading amount in the gradient active coating is 0.05-0.2 mg / cm < 2 >. The preparation method comprises the three steps of titanium substrate pretreatment, precursor salt alcohol solution preparation and gradient active coating preparation. By adopting a gradient coating mode, the thermal stress between the coating and the titanium substrate in the preparation process is remarkably reduced, the consumption of noble metal is reduced, the oxygen evolution activity of the anode is improved, and the service life of the anode is prolonged. The method is simple to operate and low in cost, and has remarkable industrialization advantages.

The invention provides a method for recycling valuable metal from germanium-antimony-tellurium alloy waste. The method comprises the three steps of surface treatment, chlorine reaction and compartment condensation and discharging. Oxidation films on the surfaces of the waste materials are removed through surface treatment, and the subsequent chlorine reaction efficiency is improved; then a self-made chlorination-step condensation integrated device is utilized, germanium, antimony and tellurium react with chlorine at the high temperature to generate gaseous chloride, step-by-step condensation separation is achieved through partition temperature control based on the boiling point difference of tellurium tetrachloride, antimony pentachloride and germanium tetrachloride, and target products are collected respectively; and finally, introducing inert gas to purge residual chlorine, and discharging safely. The method has the advantages of short process flow, no need of complex wet process steps and low equipment investment; metal chlorides are efficiently separated through the integrated device, and recovery is thorough; and the pyrogenic process is mainly adopted, no wastewater is generated, only tail gas is treated in a compliance manner, and the method is environment-friendly. Compared with a traditional wet process, the method has the remarkable advantages of high efficiency, low cost, environment friendliness and the like.

The invention discloses a method for increasing the recovery rate of lead fire refining alkaline residues. The temperature of the roasting furnace is set to be 580-650 DEG C, after the actual temperature reaches the set temperature, the refined alkaline residues are conveyed into the roasting furnace, the rotating speed of the roasting furnace is controlled to be 0.5-1 circle / min, the amount of blown air is 2-5 m < 3 > / min, the materials are subjected to oxidizing roasting in the roasting furnace for 30-60 min, the temperature is reduced to 30-50 DEG C, and roasted sand materials are obtained; detecting the roasted product material to obtain the content of the S element; the roasted sand materials and corresponding auxiliary materials are put into a smelting furnace in batches, the temperature in the furnace is controlled to be 900-1100 DEG C, the smelting time is 2-3 h, and produced lead bullion is discharged after the smelting time is up; the auxiliary materials are prepared according to the input amount of a single-batch roasted product material and the content of the S element. The recovery rate of lead, tin, antimony and copper in the pyrorefining alkaline residues can be effectively increased, and the cost of smelting auxiliary materials is reduced.

The invention discloses a preparation method and application of a metal sulfide adsorbent for adsorbing iodine and methyl iodide. The preparation method comprises the following steps: uniformly mixing an antimony source, a sulfur source, a deep eutectic solvent, polyamine and water to obtain a mixed solution; and transferring the mixed solution into a high-pressure reaction kettle, sealing, carrying out hydrothermal reaction at 110-220 DEG C for 2-9 days, cooling to room temperature to separate out crystals, and filtering, washing and drying to obtain the metal sulfide adsorbent. The invention also discloses application of the metal sulfide adsorbent in adsorption of iodine and methyl iodide. The metal sulfide adsorbent disclosed by the invention has a good adsorption effect on iodine and methyl iodide, and compared with an ethylenediamine-oriented metal sulfide adsorbent, the diethylenetriamine-oriented metal sulfide adsorbent has higher adsorption capacity on iodine and methyl iodide.

The invention relates to the technical field of geological exploration, in particular to an X-ray fluorescence spectrometer and geological radar combined gold vein rapid positioning method, which comprises the following steps: S1, arranging an exploration survey line in a pre-selected exploration area; s2, along the same measuring line, measuring the content of the gold mineralization indication element in the earth surface or the shallow medium by using an X-ray fluorescence spectrometer, synchronously recording the position information of a measuring point, and generating element content spatial distribution data; the gold mineralization indicating element comprises at least one of arsenic As, antimony Sb and mercury Hg; s3, carrying out detection by using a geological radar along the same measuring line, obtaining a reflected wave signal of an underground medium, synchronously recording position information of a detection point, identifying fault zone and joint zone geological structure anomalous bodies through data processing, and generating geological radar space distribution data; through XRF and GPR data fusion, a CAI quantitative model is established to precisely delineate an ore prospecting target area, a hidden ore body is effectively identified, the exploration precision and efficiency are greatly improved, and the exploration cost is reduced.

A preparation method of 5N high-purity antimony comprises the following steps: (1) hydrolysis: taking ethylene glycol antimony as a raw material, and carrying out pyrohydrolysis pretreatment to obtain antimony trioxide; (2) biological reduction: uniformly mixing antimony trioxide with an organic catalytic reduction covering agent, and carrying out reduction smelting to prepare 4N antimony; and (3) vacuum distillation: the 4N antimony is subjected to two-stage vacuum distillation, namely first-stage high-temperature vacuum distillation and second-stage low-temperature vacuum distillation, and the 5N high-purity antimony is obtained. According to the method, an ethylene glycol antimony product is adopted as a raw material and subjected to hydrolysis-biological reduction and multi-field synergistic enhanced vacuum distillation to obtain 5N high-purity antimony, the total amount of impurity elements of the product is controlled to be 10 ppm or below, the content of key impurity elements As is controlled to be 1 ppm or below, the content of Pb is controlled to be 0.2 ppm or below, the content of Bi is controlled to be 0.2 ppm or below, the content of Cu is controlled to be 0.05 ppm or below, and the content of Fe is controlled to be 0.5 ppm or below.

The invention discloses a method for removing arsenic and antimony from a nickel sulfate solution, which is characterized in that an overflow kettle group formed by a plurality of overflow kettles connected in series is used for removing arsenic and antimony from the nickel sulfate solution, so that the arsenic and antimony removal of the nickel sulfate solution is continuous production, and the content of arsenic and antimony elements in the solution subjected to arsenic and antimony removal only needs 3-4 hours to be analyzed in the production process; when the first-stage overflow kettle completely reacts, an open circuit can be formed, and the second-stage overflow kettle becomes a new first-stage overflow kettle; carrying out filter pressing on the solution in the open-circuit first-stage overflow kettle, collecting the nickel sulfate solution without arsenic and antimony, and adding the nickel sulfate solution without arsenic and antimony into a new first-stage overflow kettle to continuously participate in the reaction; adding filter residues generated by filter pressing into a slurrying tank for slurrying; according to the process disclosed by the invention, arsenic and antimony elements in the nickel sulfate solution can be removed while the nickel sulfate solution is collected by filter pressing, so that the production efficiency is greatly improved. The filter residues are recycled, so that the risk of environmental pollution is reduced.

The invention discloses a high-voltage-resistant brominated flame-retardant polyamide composition and a preparation method thereof, and belongs to the technical field of flame-retardant materials. The composition comprises the following components in percentage by mass: 30-80 wt% of aliphatic polyamide, 10-30 wt% of a brominated flame retardant, 0.5-10 wt% of an antimony-based synergist, 0.5-10 wt% of aromatic zinc carboxylate, 0.5-5 wt% of hydroxyapatite, 0.1-50 wt% of a reinforcing agent and 0-5 wt% of other auxiliaries, the sum of the contents of all the components is 100 wt%, and the raw material components are subjected to melt blending processing through a single-screw or double-screw extruder. The invention provides the high-voltage-resistant brominated flame-retardant polyamide composition, the relative tracking index (CTI) of the high-voltage-resistant brominated flame-retardant polyamide composition is greater than 400V, and the high-voltage-resistant brominated flame-retardant polyamide composition has high-level flame retardance and cost effect.

The invention provides an electroplating solution and an electroplating method for preparing an antimony-containing tin-based alloy packaging bump structure. The content of antimony atoms in the bump structure is 0.1-8.0%; the electroplating liquid comprises tin (II), antimony (III), an inhibitor, methanesulfonic acid and an antioxidant; the concentrations of the tin (II), the antimony (III), the inhibitor, the methanesulfonic acid and the antioxidant in the electroplating solution are 15-60 g / L, 0.01-8.0 g / L, 0.5-15.0 g / L, 20-200 mL / L and 1.0-3.0 g / L in sequence. The electroplating solution can effectively realize co-deposition of tin ions and antimony ions, and the situation that the deposition rate is not matched in the deposition process due to the electrochemical characteristic difference of tin and antimony is overcome; the content of antimony atoms in the generated bump structure is 0.1-8.0%, and a small amount of metal antimony is added into a tin base, so that grains can be refined, the crystal face of a plating layer can be promoted to obtain excellent surface flatness, and the hardness of the plating layer can be effectively improved.

The invention discloses a preparation method and application of a high-thermal-conductivity liquid metal gallium-indium-tin alloy, and relates to the technical field of gallium-indium-tin alloys, the high-thermal-conductivity liquid metal gallium-indium-tin alloy is prepared by weighing the following components in percentage by weight: 65-80% of gallium, 15-25% of indium, 3-10% of tin, 0.1-2% of trace element combination X and 0.05-1% of Y, and the purity of the gallium, the purity of the indium and the purity of the tin are greater than or equal to 99.99%, and the X is one or two of antimony and bismuth; y is one or two of zinc and copper; the raw materials are heated to 120-200 DEG C, so that the raw materials are completely molten into a liquid state; the molten liquid metal is subjected to magnetic field auxiliary stirring, and evenly-mixed alloy liquid is formed; and cooling the alloy liquid to room temperature in a vacuum or inert gas environment. The temperature sensing medium has the advantages that by synergistically adding antimony, bismuth, zinc, copper and other trace elements, the temperature sensing medium can be simultaneously used as a core temperature sensing medium of an expansion type thermometer and a resistance type thermometer, and the temperature sensing medium has high precision, wide temperature range and environmental friendliness.

The invention provides a method for preferentially extracting gold and silver from lead anode slime, and relates to the technical field of precious metal recovery, firstly, silver, antimony and other valuable metals in the lead anode slime are leached into a solution through catalytic oxidation leaching in the presence of a protective agent, and gold is enriched in residues; then, silver is selectively precipitated from the leachate, and silver precipitation residues and a valuable metal solution are obtained; and finally, valuable metals in the solution are recovered by adding a neutralizer and a precipitator, the obtained leaching mother liquor can be returned for leaching after being supplemented with hydrochloric acid, and the valuable metal precipitates are used for recovering antimony and bismuth. The method changes the traditional lead anode slime treatment thinking of first impurity removal and second refining, has the characteristics of high gold and silver direct recovery rate (greater than 99.5%), high reaction speed (total consumed time is less than 1 h), low cost and no generation of waste residue and wastewater, and is expected to solve the problems of long gold and silver recovery process, low direct recovery rate, capital overstock and difficult treatment of arsenic and antimony-containing smoke in the existing lead anode slime treatment method. The method has remarkable economic and environmental benefits and a good application prospect.

The invention relates to a preparation method of antimony pentafluoride, which comprises the following steps: preheating raw material gas nitrogen trifluoride, placing nitrogen trifluoride and antimony powder in a tubular furnace reactor made of a specific material, carrying out gradient heating reaction at 300-400 DEG C under the condition that the antimony powder is distributed by adopting a multi-layer nickel plate tiled structure, carrying out reaction for 10-40 seconds, and carrying out solid filtration through a filter after the reaction is completed, so as to obtain the antimony pentafluoride. And carrying out cold trap collection to obtain an antimony pentafluoride product. The diameter of the reactor is made of a nickel material or Monel to prevent corrosion of antimony pentafluoride, the number of tiled layers of nickel plates is r / 5-r / 10, the contact area is increased, the reaction yield is increased, and the utilization rate of the raw material nitrogen trifluoride is increased.

The invention discloses an antimony electrolyte impurity removal adsorbent as well as a preparation method and application thereof, and relates to the technical field of antimony electrolyte purification. The adsorbent is specially used for solving the problem that lead and bismuth ions similar to antimony in potential in the antimony electrolyte are difficult to deeply remove. The preparation method comprises the following steps: mixing sulfuric acid, deionized water, antimony oxide powder and hydrogen peroxide according to a specific mass ratio (1: (0.8-1.5): (0.5-1.5)), and controlling the liquid-solid ratio to be 8-15 mL / g to form a synthetic initial solution; then reacting for 0.5-4 hours under the condition of stirring at the temperature of 60-90 DEG C and the speed of 200-600 r / min; and finally, carrying out solid-liquid separation and drying at 55-110 DEG C for 1-12 hours. When the adsorbent is applied, the adsorbent is added into electrolyte according to the proportion of 500-5000 times of the total mass of lead and bismuth, reaction is performed for 1-6 hours under the conditions of 30-90 DEG C and 200-550 r / min, and deep purification can be realized after standing, settling and separating. The method is short in technological process, mild in condition, easy to operate, environmentally friendly and high in lead and bismuth removal rate, purified liquid can return to an electrolysis system, the saturated adsorbent can be regenerated and reused, and good economic benefits and application prospects are achieved.

The invention belongs to the technical field of metallurgy, and relates to a comprehensive recovery method for antimony-containing gold concentrate, which comprises the following steps: S1, mixing antimony-containing gold concentrate and an antioxidant, carrying out size mixing, then adding sodium sulfide and sodium hydroxide to obtain a size, and reacting to obtain a leaching solution and leaching residues; s2, the leachate obtained in the step S1 is subjected to electrodeposition, and crude antimony and barren liquor are obtained; wherein in the step S1, the antioxidant is a mixture of sodium ascorbate and ethylenediamine tetraacetic acid disodium salt. According to the method, the antimony-containing gold concentrate is subjected to antimony leaching through Na2S under the alkaline condition, in order to avoid gold loss caused by the fact that S < 2-> is oxidized into S < x > < 2-> and then the S < x > < 2-> and Au generate AuSx dissolved in an alkaline solution in the leaching process, an antioxidant is added in the leaching process, leaching of gold in the antimony-containing gold concentrate can be remarkably reduced, and the recovery rate of gold is increased.

The application provides a manganese-activated antimony acid-based fluorescent powder and a preparation method and application thereof, and relates to the technical field of luminescent materials. 1‑ x Y x )3Li5Sb 2‑y O 12 :yMn, and 0 < x <= 0.3, 0.001 <= y <= 0.01. 3+ The Y 3+ can improve the luminous efficiency and thermal stability of the fluorescent powder, and the fluorescent powder can emit red fluorescence with a wave band of 650nm-770nm under near-ultraviolet light and blue light excitation.

The application belongs to the technical field of metallurgy, and relates to a method for efficiently purifying and directionally removing oxygen and impurities from a precious antimony alloy, which comprises the following steps: S1, after the precious antimony alloy is melted, an arsenic-tellurium removal agent is added, and smelting is performed at 600-610 DEG C to obtain a pre-impurity removal alloy melt and an arsenic-tellurium residue; the arsenic-tellurium removal agent is a mixture of sodium hydroxide and sodium nitrate; S2, the pre-impurity removal alloy melt obtained in step S1 is heated to 620-640 DEG C, a reducing agent is added, and smelting is performed to obtain an arsenic alkali residue and a refined antimony alloy; the reducing agent is a mixture of antimony sulfide and sodium hydroxide; S3, the arsenic-tellurium residue obtained in step S1 and the arsenic alkali residue obtained in step S2 are ball milled, leaching and filtration are performed to obtain a filtrate and a filter residue; S4, the filtrate obtained in step S3 is mixed with sulfuric acid, and after reaction, a neutralization residue and a neutralization liquid are obtained. By introducing the efficient arsenic-tellurium removal agent and the reducing agent, the content of antimony in the arsenic alkali residue is significantly reduced, and the direct recovery rate of antimony and the recovery rate of tellurium are effectively improved.

The invention discloses a high-melting-point high-temperature lead-free environment-friendly soldering paste and a preparation method thereof. The soldering paste is composed of 85-89% of alloy powder and 11-15% of flux paste. The alloy powder comprises the following components in percentage by weight: 0.5 to 7.0 percent of tin, 0.2 to 3.0 percent of silver, 0.2 to 1.5 percent of copper, 0.5 to 5.0 percent of nickel, 0.02 to 0.8 percent of antimony and the balance of bismuth. A high-boiling-point solvent, modified resin, an active agent containing an antioxidant and a thixotropic agent are adopted in the flux paste, and the flux paste and the alloy powder are prepared into the soldering paste through a vacuum mixing technology. The problem of high-temperature secondary melting of traditional lead-free solder is solved, and the lead-free solder is suitable for high-temperature welding scenes such as ICs and power devices.

The invention provides a production method of high-strength nodular cast iron and belongs to the technical field of metal material processing. Comprising the following steps: proportioning: proportioning the following raw materials in percentage by weight: 60-70% of pig iron, 20-30% of foundry returns and 10-15% of waste steel; pig iron is added to the bottom of the furnace, foundry returns are added, and finally waste steel is added; after the molten iron is uniformly molten, heating to 1420-1440 DEG C, and sampling to analyze chemical components; inoculation and nitrogen increasing treatment: spheroidizing by adopting a pouring method, sequentially adding pure antimony, a rare earth magnesium spheroidizing agent and a mixture of ferromanganese nitride and a ferrosilicon inoculant, adding the rest of molten iron and the inoculant in stages, and adding an antimony-containing inoculant during pouring; and after pouring is completed, the box is opened for cooling when the temperature of the casting is reduced to 800-900 DEG C. According to the method, the nitrogen increasing process is matched with microalloying, the problems of high alloy adding amount and high cost in the prior art are solved, the alloy using amount can be remarkably reduced, and meanwhile the mechanical property of cast iron is guaranteed.

The invention belongs to the technical field of non-ferrous smelting, and particularly relates to a method for leaching copper from silver separation furnace slag and application. The method for leaching the copper from the silver separation slag comprises the following steps: (1) mixing and slurrying the silver separation slag and water, then adding concentrated sulfuric acid to carry out a leaching reaction, controlling the final pH value to be 1-4.5, and introducing hydrogen peroxide during the leaching reaction to obtain a leaching solution and leaching slag; (2) mixing the leached residues with concentrated sulfuric acid, curing, leaching, and filtering to obtain cured liquid and cured residues; the cured liquid is subjected to countercurrent circulation back to the step (1) to replace water and concentrated sulfuric acid. Most of copper is leached from the silver separation furnace slag through first-stage concentrated sulfuric acid oxidation leaching, so that the copper is separated from metals such as lead, bismuth, antimony and silver; and meanwhile, a second-stage curing reaction is introduced, the structure in the leaching slag is destroyed by concentrated sulfuric acid, copper and oxides thereof in a complex structure are released, the copper content in the cured slag is smaller than 0.1%, the copper leaching rate reaches 99% or above, and deep recovery of copper in the silver separation slag is achieved.

The invention discloses a multi-stage injection method for side-blown reinforced smelting of antimony concentrate, which relates to the technical field of non-ferrous metallurgy and comprises the following steps: a, a charging and preheating stage: conveying antimony concentrate, flux, fuel and other auxiliary materials into a smelting furnace, and injecting by adopting a low-speed and small-quantity gun; b, an intensified smelting stage: after charging is completed, executing when a large amount of materials are melted and main oxidation reaction occurs, and adopting high-speed and multi-gun collaborative injection; c, a stabilizing and refining stage: after the main oxidation reaction tends to be stable and the components of a molten pool tend to be stable, performing injection by adopting a medium-speed and decrement spray gun; and for each stage, preset and different injection parameter combinations are adopted. According to the method, the smelting process is divided into different stages, and the optimal injection parameter combination is matched for each stage, so that the comprehensive technical effects of improving the antimony direct recovery rate, reducing returned materials, reducing energy consumption and prolonging the service life of a furnace lining are achieved.

The invention provides a ferrihydrite-spent grain solid powder material as well as a preparation method and application thereof, and relates to the technical field of removal of arsenic and antimony in a water body. The preparation method comprises the following steps: respectively providing spent grain powder leachate and an iron nitrate nonahydrate solution; dropwise adding the spent grain powder leachate into the iron nitrate nonahydrate solution until the pH value of the obtained mixed solution is 7.2-7.5; wherein the dropwise adding speed is 50mL / h; and carrying out centrifugal treatment, cooling treatment and freeze drying treatment on the mixed solution. The preparation method is simple and easy to operate, the material can be prepared in quantity, and quantitative production is realized. The material can be used for reducing the content of arsenic and antimony in a water body by constructing a barrier zone at the upstream of the water body. According to the barrier belt, the concentration of arsenic and antimony in the water body is remarkably reduced, and water resources and the ecological environment are protected. Complex equipment and operation procedures are not needed, and when the material reaches adsorption saturation, the material is easy to replace, convenient to maintain and manage and wide in application range.

A non-oriented electrical steel sheet having a composition of the following elements, expressed in percentage by weight 0.0001%≤Carbon≤0.007%, 0.15%≤Manganese≤0.25%, 2.9%≤Silicon≤3.4%, 0.8%≤Aluminum≤1.1%, Phosphorus≤0.15%, Sulfur≤0.006%, Nitrogen≤0.09%, with 3.85%≤Si+Al+Mn≤5.5%, and the following optional elements 0%≤Niobium≤0.1%, 0%≤Titanium≤0.1%, 0%≤Vanadium≤0.1%, 0%≤Chromium≤1%, 0%≤Molybdenum≤0.5%, 0%≤Tungsten≤0.1%, 0%≤Cobalt≤1%, 0%≤Arsenic≤0.05%, 0.001%≤Calcium≤0.01%, 0%≤Copper≤1%, 0%≤Nickel≤1%, 0%≤Boron≤0.05%, 0%≤Lead≤0.2%, 0%≤Tin≤0.2%, 0%≤Antimony≤0.2%, the remainder composition being composed of iron and unavoidable impurities caused by processing. The microstructure is made of ferrite and including in area fraction, 80% to 100% recrystallized microstructure, 0% to 20% non-recrystallized microstructure wherein the average grain size of recrystallized microstructure is from 20 microns to 110 microns and having a percentage of eddy current losses in total iron losses less than 25% and simultaneously having a magnetic polarization at 5000 A / m from 1.625 T to 1.690 T.

The present invention provides an antimony-based organic-inorganic hybrid metal halide luminescent material and a preparation method thereof, which is applicable to the photoelectric field. The present invention uses 2-methylpiperazine as an organic ligand to synthesize a luminescent material with the chemical formula (C5H 14 N2)SbCl5 luminescent material, where C5H 14 N2 represents the cationic form of 2-methylpiperazine. The excitation wavelength range of this material is 250 to 400 nanometers, while its emission wavelength covers 450 to 850 nanometers, with the main emission peak at approximately 600 to 650 nanometers. The preparation method of the present invention is characterized by a simple process, low cost, and suitability for large-scale production. In addition, the luminescent material exhibits wide excitation and emission bandwidths and has high luminous efficiency. It can be widely used in the manufacture of light-emitting devices, as well as in applications such as phosphors, spectrum conversion, and display lighting.

The invention provides a preparation method of high-purity antimony, and belongs to the technical field of high-purity metal materials. The preparation method of the high-purity antimony comprises the following steps that a crude antimony raw material is added into a cylindrical container, then the cylindrical container is placed in an induction heating coil, and under the conditions that the induction power is 30-150 kW, the change frequency is 2-15 kHz and the rotating eddy current is in the clockwise direction, the crude antimony raw material is subjected to induction melting, and gathering the impurities at the edge, parallel to the section circle of the cylindrical container, of the molten antimony, cooling, and removing the impurities to obtain the high-purity antimony. According to the preparation method of the high-purity antimony, the purity of the crude antimony raw material can be rapidly and effectively improved.

The invention discloses an iron-mud-based environmental functional material based on an electrochemical-ferrate synergistic effect as well as a preparation method and application of the iron-mud-based environmental functional material. The material is derived from an iron sludge byproduct generated in the process of cooperatively treating wastewater by electrochemical oxidation and ferrate. Due to the influence of active oxygen species, electric field action and local pH gradient in an electrochemical system, the forming process of the iron mud is different from that of conventional chemical precipitation, the obtained material has an amorphous and high-specific-surface-area unique structure and is endowed with remarkable oxidation capacity, and cooperation of oxidation and adsorption functions is achieved. The material disclosed by the invention can be used for efficiently removing anion pollutants such as arsenic, antimony and phosphate in a water body. According to the invention, solid wastes generated by a combined process are converted into a high-performance adsorption material, so that the resource utilization of treating wastes with wastes is realized, the comprehensive operation cost of the advanced oxidation process is effectively reduced, and the method has good environmental and economic benefits and application prospects.

The application discloses a method for preferentially extracting antimony from lead-antimony co-associated ores, comprising the following steps: mixing lead-antimony co-associated ore materials with sulfides and alkali according to certain proportions to obtain mixed materials; low-temperature roasting the mixed materials to obtain roasted materials; water leaching and solid-liquid separation treatment of the roasted materials to obtain water leaching solution; configuring the water leaching solution into an electrodeposition solution; and electrolytic deposition treatment of the electrodeposition solution to obtain antimony on a cathode. The low-temperature roasting-water leaching-electrodeposition process can realize preferential extraction of antimony and efficient separation of lead and antimony. Lead is enriched in the water leaching residue, which is helpful for subsequent extraction and smelting of lead, and avoids the industry common problem that lead-antimony intermediate alloy is difficult to separate in the traditional process. In the application, sulfides of antimony fully react with sodium sulfide and sodium hydroxide in the roasting process, and the reaction rate is faster than that in water solution leaching. Not only the reaction time is shortened, but also the consumption of sodium sulfide is significantly lower than the amount required in conventional alkaline hydrometallurgy of antimony.

The invention belongs to the technical field of medicine detection, and particularly relates to an ICPMS (Inductively Coupled Plasma Mass Spectrometry) detection method for element impurities in theophylline. The linear test solution, the blank solution and the theophylline test solution are subjected to ICPMS detection, the content of element impurities in the theophylline test solution is calculated according to an internal standard curve method, and the element impurities are one or more of cadmium, lead, arsenic, mercury, cobalt, vanadium, nickel, lithium, antimony or copper. The method is good in reproducibility and stability, high in accuracy and high in precision.

The invention relates to a CeOx quantum dot-iron ore composite material and a preparation method and application thereof, and relates to the technical field of wastewater treatment, and the CeOx quantum dot-iron ore composite material comprises cheap natural siderite as a matrix and CeOx quantum dots loaded on the matrix through a precipitation-roasting method. According to the invention, the CeOx quantum dots are strong in dispersity and good in stability; the composite material has variable valence Ce (IV) / Ce (III) species, so that oxidation detoxification of Fe (III) on Sb (III) is realized; compared with pure siderite, the composite material has a larger effective contact area and more oxidation adsorption points, and the oxidation adsorption effect of siderite on Sb (III) is greatly improved. In conclusion, the composite material disclosed by the invention not only can effectively oxidize and detoxify Sb (III), but also can thoroughly and completely remove Sb (III) from water, so that the aim of thoroughly treating antimony-containing wastewater by using cheap minerals is fulfilled, and the composite material has the advantages of low cost, high efficiency and the like, thereby having a good application prospect.

The invention relates to the technical field of purification and impurity removal, and discloses a method for preparing low-antimony niobium oxide by removing antimony from a fluoroniobic acid solution, which comprises the following steps: adding peroxide into the fluoroniobic acid solution for complexing, then adding ammonia to adjust the precipitation pH value of the solution to obtain niobium salt precipitation, carrying out solid-liquid separation, and roasting to obtain the low-antimony niobium oxide. According to the method, the deep removal of antimony in the fluorine niobic acid solution can be realized, and the obtained niobium-containing peroxide complex can meet the requirements of preparing a 4N-grade high-purity niobium oxide product; the method does not need to consume expensive special reagents, only needs to consume part of peroxy ions, is low in cost and small in pollution, and is beneficial to product quality; the whole process is simple to operate, does not need other matched impurity removal equipment, is low in investment and short in flow, and is easy to realize continuous production.