29results about "Rhenium compounds" patented technology

The invention discloses a surfactant for selectively extracting perrhenate and an application method of the surfactant, the surfactant is a high-selectivity diamino surfactant, and ammonium perrhenate can be separated and enriched by the surfactant. The application method comprises the following steps: adjusting the pH value of a perrhenate-containing leachate, sequentially adding the diamino surfactant and the bubble dispersant, and introducing gas for flotation to obtain a rhenium-rich component; and after the rhenium-rich component is subjected to pH adjustment, a stripping agent is added for stripping, so that ammonium perrhenate with relatively high purity is obtained. The method is simple in technological process, low in operation cost, good in selective separation effect on ammonium perrhenate, capable of effectively overcoming the defects that a traditional solvent extraction process is tedious and high in extraction agent consumption, and suitable for selective separation of ammonium perrhenate under the low-concentration condition.

The application discloses a method for preparing high-purity ammonium rhenate by separating molybdenum and rhenium, which comprises a reaction device and a reaction process. The reaction device is a T-shaped quartz tube, which is divided into four temperature zones. The first, second and third temperature zones are located in the horizontal tube section of the T-shaped quartz tube, and the fourth temperature zone is the vertical tube section of the T-shaped quartz tube. Oxide raw materials containing molybdenum and rhenium are placed in the first temperature zone. Under the oxygen atmosphere, the high-valence molybdenum and rhenium oxides are separated in the horizontal straight tube by the temperature difference between the temperature zones. The gaseous high-valence rhenium is condensed in the fourth temperature zone to generate high-purity rhenium heptoxide. Under the assistance of high-purity ammonia water, high-purity ammonium rhenate is prepared by cooling and crystallization. The quality of the ammonium rhenate can reach 4N or above.

This invention discloses a process for preparing chlorides by reducing chlorination with rare metal oxides, comprising the following steps: S1, in an inert atmosphere, a mixture containing rare metal oxide powder, a reducing agent, and a chloride salt is subjected to a reduction reaction at a predetermined temperature 1; S2, the temperature is lowered to a predetermined temperature 2, oxygen is introduced, and the concentration of oxygen in the mixed gas is adjusted to carry out a chlorination reaction, and the chlorinated product is condensed and collected. This invention eliminates the need for gaseous chlorinating agents such as chlorine or hydrogen chloride, avoiding the leakage risks of liquid chlorine and compressed hydrogen chloride during storage and transportation; the raw materials can be directly rare metal oxides, with a wide range of sources, good process adaptability, and significantly reduced production costs.

The invention discloses resin purification equipment for ammonium perrhenate production and an extraction method thereof, and relates to the field of non-ferrous metal smelting waste residue utilization, the resin purification equipment comprises a support, at least two columns are installed on the support, partition plates are used for separating resin particles, and multiple layers of partition plates are arranged in the height direction in the columns at intervals; the rotating shaft is coaxially and rotationally connected into the column body, the bottom end of the partition plate is rotationally connected with stirring rods used for stirring resin particles, liquid inlet flow at the top end of the column body can drive the rotating shaft to rotate, and the rotating shaft and all the stirring rods are provided with mutually-matched protruding block structures in a staggered mode. The rotating shaft can rise and fall in a reciprocating mode in the height direction while rotating. The rotating mechanism is driven by liquid inlet water flow in the ion exchange process to intermittently disturb the resin bed in each independent chamber, so that resin particles are in full contact with the material liquid in a transient suspension state, and the problems of crushing and shear desorption caused by long-term stirring are effectively avoided.

The invention discloses a preparation method of high-purity ammonium rhenate, which comprises the following steps: adding rhenium-rich slag and water into a high-pressure kettle, uniformly stirring, adding hydrogen peroxide, heating, pressurizing and leaching, precisely filtering after leaching, and standing to obtain a leaching solution; the leachate is treated through a four-stage anion exchange column, the saturated ion exchange column is resolved through high-quality ammonia water, and resolved liquid is purified and enriched ammonium rhenate liquid; and performing high-temperature thermal crystallization on the purified and enriched ammonium rhenate solution under the action of micro-pressure ultrasonic waves, performing centrifugal separation to obtain high-purity ammonium rhenate crystals, and performing high-temperature drying to obtain a high-purity ammonium rhenate product. The method is simple in process, and the prepared product is high in activity, high in crystallization rate and excellent in purity and has high application value.

The invention relates to the technical field of ammonium rhenate purification, and particularly discloses a method for removing Tl impurities in ammonium rhenate. The method specifically comprises the following steps: dissolving ammonium rhenate in deionized water, adding an oxidant, carrying out an oxidation reaction while stirring, filtering, carrying out ion exchange, evaporation and concentration, adding ammonia water / ammonia gas to obtain an ammonium rhenate solution, freezing, crystallizing, and drying to obtain a high-purity ammonium rhenate solid. The method is simple to operate and ingenious in process, the oxidizing agent is added to oxidize and adsorb the Tl, impurities are not introduced, and the Tl which is not easily removed by ion exchange is removed, so that the high-purity ammonium rhenate is obtained. The Tl content is smaller than 0.9 ppm, and the purity of ammonium rhenate is larger than 99.999%.

The invention belongs to the technical field of hydrometallurgy, and particularly relates to a preparation method and application of a porous rhenium imprinted composite material. According to the technical scheme, the preparation method comprises the following steps: firstly, synthesizing silicon dioxide with a porous structure in an ionic liquid mixed system, dispersing the porous silicon dioxide in a rhenium-containing ionic liquid aqueous solution, then adding N-vinyl imidazole and 4-chloromethyl styrene, adding azodiisobutyronitrile, heating and stirring at 50-70 DEG C for 10-12 hours, and cooling to room temperature; after the reaction is completed, perrhenate ions used for imprinting are washed away with a diluted hydrochloric acid solution, meanwhile, other reactants which are not polymerized and are left on the surface are washed away, and the porous rhenium imprinting composite material is obtained through drying. When the material is applied to extraction and preparation of ammonium rhenate, the purity of the obtained ammonium rhenate product can reach 99.999% or above, the used reagent is environment-friendly, and obvious social benefits and economic benefits are achieved.

The application discloses a method for preparing ammonium rhenate from copper smelting rhenium-rich slag and belongs to the technical field of rare and dispersed metal metallurgy. The method comprises the following steps: mixing the copper smelting rhenium-rich slag with water, adjusting the pH value of the mixed solution to 11-13, adding hydrogen peroxide for oxidation depolymerization reaction to obtain solution I; mixing the solution I with a magnesium salt for a first precipitation reaction, performing solid-liquid separation to obtain filtrate II from which impurities M are removed; mixing the filtrate II with a calcium salt for a second precipitation reaction, performing solid-liquid separation to obtain purified ammonium rhenate solution from which impurities N are removed; and sequentially performing extraction, washing, reverse extraction and crystallization on the purified ammonium rhenate solution to obtain ammonium rhenate products. The method realizes deep removal of impurities and preparation of 4N high-purity products through a five-step coupling process of "chemical pretreatment (oxidation depolymerization + fractional precipitation)-extraction-washing-reverse extraction-crystallization".

The invention relates to metal nanoparticles which comprise a metal and a capping agent coordinated to the metal, wherein the capping agent is a salt of a cationic compound capable of absorbing visible light. It also relates to semiconductor metal oxide nanoparticles which comprise the metal nanoparticles, to a functionalised material comprising the semiconductor metal oxide nanoparticles, and to a photocatalytic paint which comprises either the semiconductor metal oxide nanoparticles or the functionalised material. The invention also relates to processes for the preparation of all these materials, and to the use of the semiconductor metal oxide nanoparticles or the functionalised material comprising them as biocides; particularly for the treatment or prevention of a viral disease or a bacterial infection; for removing Volatile Organic Compounds (VOCs) from of air and water supplies, and as a photocatalyst for water splitting.

The invention discloses a preparation method of rhenium trioxide and rhenium dioxide, which comprises the following steps of: 1, dissolving ammonium perrhenate in deionized water to prepare an ammonium perrhenate solution, and enabling the ammonium perrhenate solution to flow through an exchange column filled with H + type C160 cationic resin to obtain a perrhenic acid solution; 2, ammonium perrhenate is subjected to hydrogen reduction, and active rhenium powder is obtained; 3, mixing and drying the perrhenic acid solution and the active rhenium powder to obtain a rhenium oxide precursor; and 4, thermally decomposing the rhenium oxide precursor in an inert atmosphere to obtain a rhenium trioxide or rhenium dioxide solid. According to the method, ammonium perrhenate is subjected to cationic resin ion exchange and hydrogen reduction treatment to obtain a perrhenic acid solution and active rhenium powder respectively, then the perrhenic acid solution and the active rhenium powder are evenly mixed, dried and subjected to thermal decomposition, and cubic-crystal-form rhenium trioxide or orthorhombic-crystal-form rhenium dioxide solids are obtained; the crystal form of rhenium dioxide is effectively controlled, the raw materials are easier to obtain and store, the difficulty of the preparation process is reduced, and the method is suitable for large-scale production.

The application discloses a preparation method of rare metal chloride, which comprises the following steps: in an inert atmosphere, a mixture containing rare metal powder, a chlorine salt and an auxiliary material is heated to a predetermined temperature, oxygen is introduced, the concentration of oxygen in the mixed gas is adjusted, a chlorination reaction is carried out, and a chlorination product is condensed and collected to obtain the rare metal chloride. The application avoids the safety production risk caused by the use of chlorine or hydrogen chloride in the traditional production, and the production process avoids the leakage risk of liquid chlorine and compressed hydrogen chloride in the storage and transportation process. Since the reaction process is a double decomposition reaction, the reaction rate is controllable, the reaction does not have obvious heat release, and is safe and reliable. The chlorine content in the production tail gas is extremely low, and the environmental pollution problem caused by a large amount of chlorine-containing tail gas in the traditional chlorination process is avoided.

The application discloses a preparation device for ammonium rhenate, which comprises a concentration cauldron body, a reaction cavity, a sandwich, a rotating part, an outer feeding pipe, a multi-position mixed flow structure, a circular cylinder body, a plurality of guide ribs arranged on the inner side of the circular cylinder body, a plurality of lower concave holes arranged on the bottom of the circular cylinder body, a wrapping part arranged in the lower concave holes, a mixed flow frame slidingly arranged on the inner side of the guide ribs, a lower empty cylinder arranged at the lower end of the lower concave hole, a booster arranged on the inner side of the lower empty cylinder, a plurality of upper concave holes arranged on the top of the circular cylinder body, and an upper closing part arranged in the upper concave holes.

The invention discloses equipment for preparing high-purity ammonium rhenate by directly purifying a low-concentration rhenium solution. The equipment comprises a feeding unit, a resin pretreatment unit, an adsorption unit, a directional impurity removal unit, a sectional elution unit, a circulating enrichment unit and an evaporative crystallization unit which are controlled by a control unit in a centralized manner, a resin pretreatment unit with an annular distributor is arranged at the top of the adsorption column, uniform backwashing and ammonium activation are realized, impurities are selectively removed through a directional impurity removal unit after adsorption, and low-concentration eluent flows back to the adsorption column for secondary adsorption and enrichment through a sectional elution and circulating enrichment unit; feeding the high-concentration rhenium-rich liquid into an evaporative crystallization unit, and returning mother liquid to a system for circulation; therefore, through integrated integration and full-process automatic control, efficient adsorption, deep impurity removal, internal circulation concentration and high-purity crystallization of low-concentration rhenium are achieved, and the technical problems that in a traditional process, the adsorption rate is low, the product purity is insufficient, high-energy-consumption external concentration equipment is depended on, and operation is complex are solved.

The invention discloses an ultra-small-size ruthenium-rhenium-oxygen solid solution particle water electrolysis catalyst and a preparation method thereof. Ruthenium-rhenium alloy grows on the surface of rhenium trioxide through a solvothermal method to obtain a ruthenium-rhenium-oxygen solid solution, XPS characterization proves that the product contains multivalent ruthenium and rhenium components and a rhenium trioxide carrier, the particle size of ruthenium-rhenium nanoparticles on the carrier is 1-3 nm, and the utilization rate of ruthenium is greatly increased. An electrochemical test shows that the mass activity, the stability and the cost performance of the catalyst in a pure seawater electrolytic reaction are higher than those of commercial platinum. The catalyst has great significance on commercialization of a direct seawater electrolysis hydrogen production technology.

The invention discloses a device and method for preparing rhenium hexafluoride. A reactor is of a vertical cylindrical structure, an upper-layer mesh cage structure and a lower-layer mesh cage structure are arranged in the reactor and used for being filled with raw material metal rhenium, the aperture of the upper-layer mesh cage is larger than that of the lower-layer mesh cage, a heating mechanism is arranged outside the reactor, and a gas inlet pipe and a gas distributor are arranged at the bottom of the reactor. A gas outlet pipe at the top of the reactor is sequentially connected with the first-stage freezing collector, the second-stage freezing collector and the washing tank; a communicating pipeline is arranged between the top and the bottom of the reactor. The preparation method comprises the following steps: (1) drying metal rhenium and then placing the metal rhenium on an upper-layer mesh cage and a lower-layer mesh cage; (2) introducing nitrogen / nitrogen trifluoride mixed gas into the reactor, raising the temperature to 300-350 DEG C, and maintaining the temperature for 4-6 hours; and (3) condensing and collecting the gas generated by the reaction to obtain rhenium hexafluoride. The reaction conditions are controllable, the process is simple, and efficient and oriented conversion of ReF6 is realized.

The method for manufacturing of mixtures of rhenates(VII) of selected metals i.e. copper and / or nickel, and / or cobalt characterized in that the nickel(II) oxide of grain size from 10 to 50 nm and / or cobalt(II) oxide is added to rhenic(VII) acid of rhenium concentration ≥50 g / dm3, neutralization is carried out at 75-85°C, until pH 0.7-1.5 is achieved, non-dissolved residue is filtered and washed regularly, using 0.005-0.020 dm3 of isopropyl alcohol per each 1g, while non-dissolved residue is used for neutralization of fresh portion of rhenic(VII) acid, in such amounts that the mass of non-dissolved residue does not exceed 75%, while filtrate from filtration of non-dissolved residue is treated with copper(II) oxide, until pH 3.8-4.3 is achieved, the neutralization is carried out at 75-85°C, for 60 minutes, and non-dissolved copper residue is filtered and washed regularly using 0.005-0.020 dm3 of isopropyl alcohol per each 1 g of non-dissolved copper residue, non-dissolved copper residue from washing by isopropyl alcohol is used in neutralization of rhenic(VII) acid, after prior neutralization with nickel(II) oxide and / or cobalt(II) oxide in such amount that mass of non-dissolved copper residue does not exceed 50%, and filtrate from filtration of non-dissolved copper residue is evaporated until dry, at temperature not exceeding 85°C, thus obtained residue is dried, first at ≥150°C, for 3-6 h, then ≥190°C, for 6-12 h, until homogenous, non-hygroscopic mixture of rhenates(VII) containing ≥10% of copper, and / or nickel, and / or cobalt in total, is obtained.

The invention relates to the technical field of fluorine chemical industry, in particular to a synthesis method of rhenium hexafluoride. The method comprises the following steps: S1, preheating fluorine-nitrogen mixed gas to 50-100 DEG C in a first temperature zone; s2, introducing the preheated fluorine-nitrogen mixed gas into a second temperature zone to react with rhenium metal to generate mixed gas containing rhenium hexafluoride, wherein the temperature of the second temperature zone is 120-180 DEG C; s3, mixed gas containing rhenium hexafluoride is introduced into a third temperature zone and continues to react with rhenium metal, and the temperature of the third temperature zone ranges from 300 DEG C to 450 DEG C; s4, introducing the gas obtained in the step S3 into a fourth temperature zone, and controlling the temperature of the fourth temperature zone to be 200-300 DEG C, and S5, carrying out low-temperature collection on the gas generated in the step S4 through a cold trap to obtain the high-purity rhenium hexafluoride. Through temperature control in multiple areas, the impurity content is reduced, and the product purity is improved.

This invention discloses a method for preparing 4N ammonium permanganate from low-concentration rhenium-containing waste acid, which is divided into a crude refining stage and a refining stage. The crude refining stage includes a rhenium precipitation process, a leaching process, a hydrolysis process, an acidification process, an extraction process, a back-extraction process, and a crystallization process. The refining stage includes a crude ammonium permanganate dissolution process, an ion exchange process, an extraction process, a back-extraction process, a crystallization process, and a nitration-recrystallization process, ultimately obtaining ammonium permanganate with a purity of 99.99%. In the crude refining stage, this invention first prepares 4N ammonium permanganate from low-concentration rhenium-containing waste acid. Rhenium is efficiently and selectively enriched in concentrated waste acid to obtain a 1% grade rhenium precipitate. Then, a weak oxidation leaching process is used to remove impurities from the precipitate, followed by calcium hydroxide hydrolysis, acidification, high-efficiency extraction, back-extraction, and crystallization to obtain a crude ammonium perrhenate product with a grade of ≥99%. In the refining stage, the crude ammonium perrhenate is dissolved a second time, and a resin ion exchange, extraction, back-extraction, and crystallization process is used to obtain a refined ammonium perrhenate with a grade of ≥99.9%. Finally, a nitration-recrystallization process is used to remove impurities from the refined ammonium perrhenate to achieve a 4N grade quality.

This application relates to the technical field of ammonium perrylate purification, specifically disclosing a method for removing silicon from ammonium perrylate. The method includes the following steps: S1, electrifying a solution containing ammonium perrylate to obtain a primary perrylate solution in the region between the positive electrode and the anion exchange membrane; S2, heating the primary perrylate solution to 40-70°C, adding ammonia water or ammonia gas, stirring at high speed, then rapidly cooling to 0-4°C, and passing it through a filter membrane to obtain a secondary perrylate solution; S3, evaporating and concentrating the secondary perrylate solution, then adding ammonia water or ammonia gas to obtain a purified ammonium perrylate solution, and then freezing, crystallizing, filtering, and drying the purified ammonium perrylate solution to obtain high-purity ammonium perrylate. The ammonium perrylate obtained by the method of this application has the advantages of high purity and a silicon impurity content of less than 2 ppm.

This application discloses a treatment system and process for recovering rhenium from arsenic sulfide slag. The system uses an oxygen pressure reduction unit to convert rhenium in the arsenic sulfide slag into soluble rhenium ions and arsenic into solid-phase arsenic trioxide. The rhenium-containing solution, separated by a solid-liquid separation unit, is filtered by a pretreatment unit and then sent to an ion exchange unit. A three-in-one-standby cyclic replenishment series adsorption resin group selectively adsorbs the rhenium-containing solution. An online rhenium concentration detector and controller enable the switching and offline regeneration of the saturated first column in the series adsorption resin group. The regenerated rhenium-rich solution is concentrated, re-dissolved, filtered, and cooled to crystallize in an evaporation-redissolution-crystallization unit to obtain ammonium rhenium crystals. This application utilizes oxygen pressure reduction to simultaneously complete the conversion and separation of arsenic in the leaching process, simplifying the process flow. The three-in-one-standby resin group ensures continuous production, and the evaporation-redissolution-crystallization unit improves the purity of the recovered rhenium, achieving efficient and high-purity rhenium recovery.

The application discloses a method for preparing transition metal dichalcogenide monolayer by water phase large-scale exfoliation, and belongs to the technical field of new material preparation. The application can exfoliate a wide range of TMDs in water without using any chemical additive in a liquid exfoliation process; a TMD phase with a pre-intercalated layer is exfoliated in water by using a probe ultrasonic cavitation mechanical exfoliation to generate various TMD monolayers. The application uses water as a solvent, is low in cost, does not use any additive, and does not have the problem that the added additive is attached to the surface of a TMD flake and then affects the overall performance of the TMD flake. The application has high TMD monolayer yield, can be prepared on a large scale, and has high concentration and high stability. The two-dimensional TMD prepared by the application can be mixed and combined with a series of functional materials to form a two-dimensional multifunctional heterostructure, and can form a stable colloidal dispersion at a high concentration, thereby providing a multifunctional platform for assembling various multifunctional composite materials.

The invention discloses a method for preparing ammonium rhenate from rhenium-rich molybdenum-containing slag. The method mainly comprises the following steps: (1) oxidizing and leaching the slag charge in sulfuric acid and hydrogen peroxide to obtain a leachate containing rhenium and molybdenum; (2) adjusting the pH to be weakly acidic to remove impurities such as iron and the like, then adjusting the pH to be neutral to change the form of molybdate ions, so that the molybdate ions are converted into a monomer form (MoO4 < 2->) with relatively weak adsorbability, and rhenium still exists in a ReO4 <-> form; (3) carrying out selective adsorption of rhenium on the neutralized liquid through weak base anion exchange resin, and (4) carrying out desorption by adopting an ammonia water solution, and then carrying out evaporation concentration and cooling crystallization to obtain high-purity ammonium rhenate. According to the process, efficient separation of rhenium and molybdenum is achieved, the total rhenium recovery rate is larger than or equal to 92%, the final product purity is larger than or equal to 99.99 wt% (4N grade), and good industrial feasibility is achieved.

The present application belongs to the technical field of purification of dispersed metal salt, and particularly relates to a method for purifying ammonium perrhenate. The existing methods for purifying ammonium perrhenate mainly include recrystallization, solvent extraction and ion exchange. The recrystallization method has the problems of low purification efficiency, high cost and limited deep removal of impurities. The solvent extraction method has the problems of great environmental pressure, serious emulsification and high residual organic solvent in ammonium perrhenate. The ion exchange method has the problems of small processing capacity, easy deactivation of resin and frequent regeneration. The present application discloses a method for purifying ammonium perrhenate. In the presence of a surfactant, impurity metals in ammonium perrhenate are separated by gas floating in an aqueous organic solvent, and high-content ammonium perrhenate is prepared. The purification method has the characteristics of simple purification process, high purification efficiency and low solvent residue.

The invention discloses a preparation method of 6N-grade high-purity ammonium perrhenate based on chromatographic separation and directional crystallization. The method aims at solving the technical bottleneck that trace metal impurities similar to rhenium ions in property are difficult to effectively remove to achieve the purity of 6N in a traditional process. The method comprises the following core steps: (1) dissolving and pretreating an industrial-grade ammonium perrhenate raw material; (2) carrying out separation by adopting an ion exchange chromatographic column filled with a chromatographic filler modified by a specific functional group, and realizing accurate separation by utilizing the difference of affinity between different ions and the filler; and (3) introducing a crystallization inducer, and obtaining a high-purity crystal through directional crystallization controlled by programmed cooling and evaporation. According to the method, high selectivity and high efficiency of chromatographic separation are combined with the purification amplification effect of directional crystallization, online mass spectrum monitoring and feedback control are integrated, technological process intelligence and high product purity stability are achieved, and the method is particularly suitable for being used as a high-performance metal rhenium powder raw material and a high-end petrochemical catalyst precursor.

The invention discloses a method for preparing rhenium dioxide based on sodium formate reduction of perrhenate radicals, and belongs to the technical field of metal material powder metallurgy preparation. The method comprises the following steps: adding perrhenate radicals into an aqueous solution containing sodium formate, taking ionizing radiation such as a < 60 > Co source and an electron accelerator as an energy source, and carrying out irradiation under the ionizing radiation to reduce precipitation to prepare rhenium dioxide. At present, perrhenate radicals can only be reduced to rhenium trioxide through a photoelectrocatalysis method, but the perrhenate radicals can be reduced to rhenium dioxide in a lower valence state through a radiation method; compared with a radiation method using alcohol as a sacrificial agent, the method has the advantages that rhenium dioxide precipitates instead of rhenium dioxide colloids can be directly generated by using sodium formate as the sacrificial agent, so that product separation is facilitated, and the yield is higher. More importantly, the usable radiation source is a commercial electron accelerator with an extensible scale, and the industrial prospect is achieved.

The invention discloses a method for preparing 5N ammonium rhenate. The method comprises the following steps: S1, preparing feed liquid; s2, oxidizing hydrogen peroxide to convert low-valence cations; s3, carrying out ion exchange on the chelate resin to remove high-valence cations; s4, deeply separating positive ions through electrophoresis; s5, removing low-valence cations through ionic membrane separation; s6, evaporation and concentration; and S7, performing segmented crystallization. By constructing a four-stage quality-grading impurity removal system and matching with a segmented crystallization and mother liquor circulation process, metal impurities can be comprehensively and efficiently removed, the product purity stably reaches the 5N grade, the chromaticity is excellent, the rhenium recovery rate is high, the process conditions are mild, operation is stable, and the method is suitable for industrial large-scale production and can meet the requirement of the high-end field for high-purity ammonium rhenate.

The application provides a preparation method and application of a ReS2 two-dimensional superlattice structure, and single-layer carbon is inserted between two adjacent ReS2 monomolecular nanolayers, which has multiple effects: not only can the interlayer spacing of ReS2 be widened, but also the insertion and removal of alkali metal ions can be facilitated; the electronic conductivity of the surface and the interior of ReS2 can be improved, so that the transmission of electrons can be sufficiently accelerated; in addition, ReS2 is confined between two single-layer carbon structures, so that the solid-solid reaction activity in the charging and discharging process is improved. Such a unique nanostructure can also form a conductive network with carbon-based materials to form a strong framework, and has excellent nanostructure stability. The product obtained by the application has a unique structure, a regular morphology, a uniform composition, no impurity phase, and excellent electrochemical characteristics.

The invention belongs to the technical field of hydrometallurgy, and particularly relates to a method for recovering rhenium in rhenium-molybdenum leachate. The method comprises the steps of activated carbon adsorption, oxygen calcination, cooling collection, ammonia water pressurization oxidation leaching, heating concentration and potassium perrhenate preparation. According to the method, the problem of organic pollution is solved, the technological process is simplified, and the product purity and the environmental protection level are improved; the total recovery rate of rhenium reaches 97.8% or above, and the purity of the potassium perrhenate product reaches 99.95% or above.

The invention relates to a method for manufacturing a metal powder from a gas comprising a metal halide, as well as to a device for manufacturing a metal powder and to a system comprising such a device.