103 results about "Iodine" patented technology

Metal recovery and separation systems and methods, more particularly electrothermal chlorination (ETC) and electrothermal carbochlorination (ETCC) methods and systems for selective metal extraction, such as extraction of key metals from waste streams. Alternatively, other oxidizing agents, such as fluorine, bromine or iodine, may be used in place of or in combination with chlorine. Further, or other reducing agents, such as a metal (0), such as tin (0), and H2 (H2 included in argon, such as 1% to 5% by volume of H2 in argon, may be used in place of or in combination with carbon. Embodiments of the invention may utilize ETC to selectively recover In from ITO-containing waste, and utilize ETC in combination with ETCC to recover Ta from capacitor waste.

The invention belongs to the technical field of gas-phase iodine and liquid-phase iodine detection, and particularly relates to a combined method for measuring the concentration of trace gas-phase iodine in a containment and analyzing forms of various types of iodine. Comprising the following steps: preparing and selecting alkaline absorption liquid, collecting trace gas-phase iodine and liquid-phase iodine samples, establishing an iodine concentration standard curve, measuring the gas-phase iodine samples, establishing an iodine form-concentration standard curve, measuring the liquid-phase iodine samples and the like. The combined method is based on the combined method of monitoring the total concentration of gaseous iodine and chemically analyzing the form of iodine in the pit liquid pool, and can measure the trace gaseous iodine concentration in different areas at different time and monitor the form of iodine in the pit liquid pool at different moments; and dynamically carrying out migration analysis of gaseous iodine in a gas phase space in the containment and chemical evolution analysis of iodine in a water pool.

The invention relates to the technical field of zinc-iodine battery electrolyte, in particular to aqueous zinc-iodine electrolyte as well as a preparation method and application thereof. The aqueous zinc-iodine battery electrolyte contains an additive and a zinc salt, the molar concentration of the additive is 0.15 M to 0.8 M, and the additive is selected from one or more of triethylamine hydrochloride, 1-butyl-1-methylpyrrolidine chloride, 1, 3-dimethylimidazole chloride, pyridine hydrochloride, aniline hydrochloride, guanidine hydrochloride and 1-ethyl-3-methylimidazole chloride. The method can directionally regulate and control zinc negative electrode deposition and iodine positive electrode reaction kinetics, realizes four-electron reversible conversion, promotes uniform deposition of zinc ions and inhibits side reactions during charging, inhibits multi-iodide shuttle and I < + > hydrolysis during discharging, and has wide application prospects in the zinc-iodine battery electrolyte industry.

The invention provides a method for growing a 1T-TaS2 single crystal by using iodine as a transport agent through a vapor transport method, and belongs to the field of single crystal preparation. The method comprises the following steps: (1) preparing a TaS2 polycrystal through repeated sintering by a solid-phase reaction method, and (2) uniformly mixing the TaS2 polycrystal with a transport agent I2, and preparing the 1T-TaS2 single crystal by a chemical vapor transport method. The principle of the method is that a solid raw material reacts with a transport agent in a high-temperature region (source region) to generate a gaseous intermediate product. The gas-phase component circulates in the tube through concentration gradient to realize continuous transportation, and finally in a low-temperature region (growth region), the gaseous compound moves in a balanced manner due to temperature difference to generate reverse reaction, and target single crystals are separated out. The 1T-TaS2 single crystal grown by the method has high quality, and is suitable for further research on physical properties such as charge density wave and the like of the 1T-TaS2 single crystal.

The invention provides a red light perovskite material based on bromine-iodine mixed halogen and a preparation method thereof, the red light perovskite material comprises a perovskite material doped with metal elements, the structural formula of the perovskite material is CsPbIxBr3-x, and X is more than 0 and less than 3; the doped metal element is one or more of zinc, potassium, aluminum, magnesium, calcium, strontium, barium, sodium, rubidium, lithium, cerium, samarium, antimony, erbium and bismuth; wherein the atomic percent of the cesium element is smaller than or equal to 21%, and the atomic percent of the doped metal element is larger than or equal to 10%; the red-light perovskite material only has one light-emitting peak, and the light-emitting spectrum does not move or deform under the irradiation of blue light. The prepared perovskite material is uniform in component and free of ion migration.

The invention relates to the related technical field of wastewater treatment, in particular to a device for treating iodine-containing wastewater through a chemical precipitation method and a treatment method thereof.The device comprises a tower body and further comprises a flow guide part fixedly arranged in the tower body, a guide mechanism is arranged on the flow guide part, and the interior of the tower body is divided into an upper cavity and a lower cavity through the flow guide part; the material distribution mechanism is arranged in the upper cavity and can pre-mix wastewater entering from the top of the tower body with a chemical precipitant, and the pre-mixed wastewater and the chemical precipitant are sequentially diffused and converged along the circumference in the process of passing through the flow guide part; a series of problems caused by inappropriate mechanical stirring strength can be effectively avoided, the selectivity and the conversion rate of the reaction are improved, and the stability and the reliability of the deiodination effect are ensured.

This invention relates to a method for iodine-induced lithium intercalation and exfoliation of two-dimensional materials, comprising the following steps: uniformly mixing a target bulk layered material with an inorganic salt to obtain mixture A; the inorganic salt contains lithium iodide; heating mixture A to 280–400°C under a vacuum environment or protective atmosphere, while simultaneously applying ultraviolet light irradiation, and obtaining mixture B through solid-state lithiation treatment; dispersing mixture B in deionized water, and obtaining the two-dimensional material through hydrolysis exfoliation, separation, washing, and drying. This invention uses an inorganic salt containing lithium iodide as the intercalation medium, and through the synergistic excitation of a light field and a thermal field, induces the oxidative decomposition of halide ions and the release of electrons, driving alkali metal ions to intercalate into the interlayer gaps of the bulk layered material to achieve in-situ solid-state intercalation. Then, through hydrolysis exfoliation, an ultrathin two-dimensional material with a large lateral dimension is obtained. The process is safe, has high intercalation efficiency, and good versatility.

The utility model relates to an adsorption device for simply measuring gaseous iodine, which comprises a large glass bottle and a small glass bottle, the upper ends of the large glass bottle and the small glass bottle are open, the large glass bottle serves as a container for bearing solid iodine, iodine adsorption materials are placed in the small glass bottle, the small glass bottle is placed in the large glass bottle through a support structure arranged in the large glass bottle, and the upper surface of the support structure is a plane. The support structure separates the small glass bottle from the large glass bottle, and the top of the small glass bottle is not in contact with the bottom of the large glass bottle cap. According to the utility model, through the measures, experiments or operations which may have risks when contact time between experimenters and instruments is reduced are realized, and the safety of operators is ensured; the adsorption effect of the measurement material is enhanced, the test time is shortened, the accuracy, precision and sensitivity of weighing analysis are improved, and the method is greatly helpful for analysis of trace samples and trace components.

The invention belongs to the technical field of two-dimensional nano materials, and relates to an MXene material as well as a preparation method and application thereof. The invention provides a novel and efficient MXene material preparation method which is characterized in that a precursor MAX phase material, a chalcogenide element simple substance and an iodine simple substance are mixed and then subjected to a high-temperature reaction in a vacuum environment. According to the method, a chalcogenide and iodine are ingeniously utilized to generate iodide (such as SeI2 or TeI2) with strong oxidizing property in situ at a high temperature, the chalcogenide in a high oxidation state can selectively oxidize A-site atoms (such as Al) in an MAX phase, the A-site atoms are converted into volatile iodide (such as AlI3) and escape from a system, and therefore selective stripping of an A layer is achieved; and a two-dimensional Mn + 1Xn skeleton is formed. Meanwhile, the reduced chalcogenide is directly bonded to the surface of MXene as a terminal group, and the functionalized MXene material with the chalcogenide terminal group (-S,-Se or-Te) is synthesized in one step.

A liquid-liquid reactor for the production of hydriodic acid and sulfur dioxide from sulfur-containing hydrocarbons or hydrogen sulfide dissolved in liquid hydrocarbon streams, iodine and water as part of a larger process for the production of hydrogen is described. Methods and equipment for the removal of sulfur from liquid hydrocarbons and the use of an iodine chemical cycle to produce hydrogen gas from the byproducts of this purification are described.

1. Name of the Design Product: Sampler. 2. Use of the Design Product: Used for sampling gases in the environment, such as aerosol sampling, iodine sampling, etc. 3. Design Key Points of the Design Product: Lies in the shape. 4. Picture or Photograph that Best Illustrates the Design Key Points: Perspective view.

Inorganic material in the form of open porosity particles where each particle comprises a lead vanadate or phosphovanadate with formula Pb3-xXx(VO4)2-2y(PO4)2y, where 0 ≤ x ≤ 0.33, 0 ≤ y < 1, X is a d

This invention relates to luminescent materials, specifically to a red-light perovskite luminescent material, its preparation method, and a light-emitting diode device. The red-light perovskite luminescent material comprises an iodine-based perovskite, wherein the iodine-based perovskite includes at least two spacer cations, and the iodine-based perovskite comprises a structure with the structural formula NMA. x PPA y Cs w Pb m I i The compound, of which 0.08

The invention relates to the technical field of iodinated organic matter deiodination, in particular to a deiodination method of an iodine-containing aqueous solution. According to the method, efficient deiodination of iodinated organic matters such as iopamidol and iodinated phenol in the iodine-containing aqueous solution is promoted through radiation illumination treatment of a 222nm ultraviolet lamp. In addition, it is found that by prolonging the illumination time, enhancing the illumination intensity or increasing the pH value of the buffer solution, the deiodination reaction is obviously promoted. The deiodination method provided by the invention is convenient to operate, does not need to add chemical reagents, is harmless to the health of a user, and is an economical, efficient and green deiodination method.

The iodine adsorber core body is used for adsorbing iodine in radioactive tail gas and is provided with a tail gas inlet, the tail gas inlet is in butt joint with a gas inlet hole, the iodine adsorber core body comprises a sealing gasket and a detection piece, the sealing gasket is annular, is arranged between a first end face and a second end face in a cushioned mode and is arranged around the tail gas inlet, and the detection piece is arranged around the tail gas inlet. An avoiding area is arranged at the annular center line of the sealing gasket, so that when the first end face and the second end face are connected in an attached mode, an annular sealing cavity surrounding the butt joint position of the tail gas inlet and the gas inlet hole is formed through sealing of the sealing gasket, and the detection piece communicates with the annular sealing cavity and is used for obtaining the sealing condition of the annular sealing cavity. And judging whether the iodine adsorber core body is mounted in place or not according to the sealing condition. The iodine adsorber core body is reasonable in structural arrangement and higher in sealing connection performance, setting conditions are provided for sealing detection, the airflow short circuit condition is effectively avoided, pollution leakage is avoided, and the invention further provides an iodine adsorber.

This invention belongs to the field of organic iodine detection technology and discloses a method for determining organic iodine in edible salt using ultra-high performance liquid chromatography-tandem mass spectrometry (UHPLC-MS / MS). The method includes the following steps: 1) dissolving edible salt in water to obtain a first solution; 2) loading the first solution onto an HLB solid-phase extraction column, and after adsorption, eluting with methanol-water solution followed by methanol elution, filtering the eluent to obtain a second solution; 3) determining the organic iodine in the second solution using UHPLC-MS / MS, and then calculating the organic iodine content in the edible salt. The UHPLC uses a 0.1%–0.12% (v / v) formic acid aqueous solution as mobile phase A and methanol as mobile phase B for gradient elution. This invention can efficiently and accurately determine the organic iodine content in edible salt, with advantages such as high detection sensitivity, strong specificity, no loss of target analytes, and short analysis cycle. The detection limits for 3-iodo-L-tyrosine and 3,5-diiodo-L-tyrosine are both as low as 1 μg / kg, and the quantitation limits are both as low as 2 μg / kg.

The invention discloses a system for detecting the iodine adsorption performance of a material, and relates to the technical field of adsorption measurement devices. The iodine storage bin comprises a first bin body for storing solid iodine and a second bin body for placing an iodine adsorption material, a pipeline provided with a valve is communicated between the first bin body and the second bin body; the internal volume of the first bin body is larger than that of the second bin body. By arranging the first bin body and the second bin body which exist independently, during use, solid iodine in the first bin body is controlled to become gaseous, then the first bin body and the second bin body are controlled to be communicated, and at the moment, the iodine adsorption material placed in the second bin body is used for absorbing gaseous iodine escaping into the second bin body; during use, the temperature in the first bin body and the temperature in the second bin body are controlled to be 70-85 DEG C, and gaseous iodine escaping into the second bin body is prevented from being condensed after being cooled.

To provide a method for eluting iodine, which can more efficiently elute iodine. [Solution] A method for eluting iodine from iodine-adsorbed activated carbon obtained by adsorbing iodine to activated carbon, the method comprising an iodine elution step of contacting the iodine-adsorbed activated carbon with an eluent having a pH of 13 or higher to elute iodine from the iodine-adsorbed activated carbon, the iodine elution step being carried out at 0 to 40°C.

The invention relates to a wet trapping process and equipment for iodine-containing tail gas. The wet trapping process comprises the following steps: S1) introducing an absorption liquid into an iodine trapping tower and spraying downwards from the top; s2) introducing the iodine-containing tail gas into the bottom of the iodine trapping tower, so that the tail gas is in countercurrent contact with the spraying absorption liquid in the tower from bottom to top, and carrying out absorption reaction; wherein the absorption liquid contains urea and sodium hydroxide, and the iodine-containing tail gas contains gaseous iodine elementary substance and methyl iodide. Through the synergistic effect of a specific absorption liquid formula and optimized operation parameters, synergistic and efficient removal of elemental iodine and organic iodine is achieved, the efficiency can reach 99% or above, operation is stable and reliable, and the method is suitable for treatment of iodine-containing radioactive waste gas of a nuclear fuel reprocessing plant.

The invention provides a method for removing trace iodine in light salt brine produced by using an ionic membrane, which comprises the following steps: adding a pH regulator and a ferrous reducing agent into the light salt brine, regulating the pH value of the light salt brine to 1-4.5, adding an excessive amount of the ferrous reducing agent, and stirring until the reaction is completed; and adsorbing and removing iodine in the light salt brine after the reaction is completed by adopting a composite adsorbent to obtain the light salt brine after the iodine removal. According to the removal method, iodide, iodate and periodate in the light salt brine are converted into elemental iodine to be removed by utilizing the reducibility of Fe < 2 + > and the oxidizability of the product Fe < 3 + >, the problem of over-reduction or over-oxidation does not exist, the process is simple, the cost is low, the removal rate is high, and the removal effect is good.

The application discloses a kind of multistage spiral pipe type heating phosphorus mud recovery phosphorus method, belong to phosphorus chemical technology field, the method is by PH adjustment pretreatment phosphorus mud slurry, again through seven-stage spiral pipe type gradient heating (temperature range 50~650 DEG C), accurate matching water, phosphorus, iodine, arsenic phase change characteristics, realize each element subsection separation;While constructing tail gas combustion heating, gas phase material reverse preheating, condensed water recycling energy and resource closed loop system.The application phosphorus recovery rate is greater than or equal to 99%, iodine, arsenic recovery rate is greater than or equal to 85%, energy consumption is reduced by more than 30%, no process wastewater and solid waste discharge, phosphorus mud residue can be used as building material raw material, suitable for full-component resource recovery of phosphorus mud in electrothermal method yellow phosphorus production, meet green chemical requirements.

The invention relates to a process for the solid-state alkalinisation of a salt that comprises at least one transition metal and is deficient in an alkali metal, this process being characterised in that it comprises the following steps: a) mixing, in solid form, the salt that is deficient in (or does not comprise) an alkali metal with the corresponding alkali metal iodide, this iodide also being in solid form, to obtain a solid mixture; b) reacting the solid mixture to obtain molecular iodine and a salt of the alkali-metal-enriched transition metal; and, optionally, c) separating the molecular iodine from the solid mixture.

A solid electrolyte according to one aspect of the present invention contains the element lithium, the element phosphorus, an element M, the element sulfur, and an element X, wherein the element M is at least one selection from the group consisting of the element silicon, the element germanium, and the element tin, and the element X is at least one selection from the group consisting of the element bromine and the element iodine. In an X-ray diffraction diagram of the solid electrolyte obtained using CuKα radiation, a diffraction peak A is present in the range of diffraction angle 2θ = 20.1° ± 0.3°, a diffraction peak B is present in the range of diffraction angle 2θ = 29.4° ± 0.3°, and a diffraction peak C is present in the range of diffraction angle 2θ = 33.3° ± 0.3°. The ratio IC / IB in the X-ray diffraction diagram of the intensity IC of the diffraction peak C to the intensity IB of the diffraction peak B is at least 0.15. The X-ray diffraction diagram either does not have a diffraction peak in the range of diffraction angle 2θ = 24.9° ± 0.3° or has a diffraction peak D in the range of diffraction angle 2θ = 24.9° ± 0.3° with the ratio ID / IB of the intensity ID of the diffraction peak D to the intensity IB of the diffraction peak B being not more than 0.05.

The present invention provides a Ga-based van der Waals room-temperature ferromagnetic crystal material, preparation and use thereof, which belong to the technical field of nano magnetic material preparation. The materials include Fe3-aGabTe2(a=-0.3 to 0.1, b=0.8 to 1.2) and Fe5-cGeGadTe2(c=-0.2 to 0.2, d=0.01 to 0.5). The growth method of Fe3-aGabTe2(a=-0.3 to 0.1, b=0.8 to 1.2) is a self-flux method, using excess Ga and Te as flux to grow crystals. The growth method of Fe5-cGeGadTe2(c=-0.2 to 0.2, d=0.01 to 0.5) is the chemical vapor transport method, using iodine as a transport agent to grow crystals. The Ga-based van der Waals room-temperature ferromagnetic crystal Fe3-aGabTe2(a=-0.3 to 0.1, b=0.8 to 1.2) and Fe5-cGeGadTe2(c=-0.2 to 0.2, d=0.01 to 0.5) materials provided by the present invention have uniform constituents, have a van der Waals structure, may be easily exfoliated mechanically, the Curie temperature thereof is 330 K to 367 K and 320 K to 345 K, and the saturation magnetic moments are 50 emu / g to 57.2 emu / g and 80 emu / g to 88.5 emu / g, respectively. The perpendicular magnetic anisotropy energy of Fe3-aGabTe2(a=-0.3 to 0.1, b=0.8 to 1.2) single crystal is as high as 3.25×105 to 4.79×105 J / m3.

The invention relates to an iodination deposition method of high-purity metal vanadium. According to the technical scheme, a high-purity vanadium metal iodination deposition furnace is adopted for iodination deposition of vanadium metal; the method comprises the following steps: uniformly paving metal vanadium in a charging tray (18), and when the charging tray (18) is heated to 600-1000 DEG C, adjusting the vacuum degree of a vacuum chamber (9) to 1 * 10 <-2 >-1 * 10 <-4 > Pa every time the charging tray (18) is heated to 100-200 DEG C; raising the temperature of the deposition cylinder (10) to 1200-1500 DEG C, and adding iodine when the temperature of the charging tray (18) is stable; performing iodination deposition for 3-24 hours; turning off the power supply, and recovering the vacuum chamber (9) to normal temperature and normal pressure to obtain a high-purity metal vanadium product; a small amount of metal vanadium which is not iodized is recycled after being subjected to acid leaching treatment, ultrasonic cleaning and drying. The method has the advantages of being simple in process, low in raw material loss, small in deposition temperature error, high in deposition efficiency, free of pollution and wide in deposition base material application range.

The invention provides a semimetal compensation ferrimagnetic material, the chemical formula of the semimetal compensation ferrimagnetic material is CrFeS2, the semimetal compensation ferrimagnetic material has a hexagonal NiAs type crystal structure and belongs to a 194 space group, and a preparation method of the semimetal compensation ferrimagnetic material comprises the following steps: packaging Cr powder, Fe powder, a sulfur block and a transmission medium iodine in a vacuum quartz tube; and placing in a heating furnace, heating at 780-920 DEG C for 4-30 days, and then quenching to a greenhouse. The semimetal compensation ferromagnetic material provided by the invention simultaneously has the characteristics of great perpendicular magnetic anisotropy and magnetic compensation characteristic, so that the material can realize zero-field cold large exchange bias, and the direction of the exchange bias can be regulated and controlled by unidirectional magnetic fields with different sizes, so that the semimetal compensation ferromagnetic material has a wide application prospect in the field of spintronics.

Provided are an iodine-containing metal compound, a composition for depositing a metal-containing thin film including the same, and a method of manufacturing a metal-containing thin film using the same. Since the composition for depositing a thin film according to one embodiment is present in a liquid state at room temperature, it has excellent storage and handling properties, and since the composition has high reactivity, a metal thin film may be efficiently formed using the composition.

The invention relates to a magnetic visible light driven photocatalyst composite particle as well as preparation and application thereof. The photocatalyst composite particles are of a core-shell structure, each photocatalyst composite particle comprises a superparamagnetic material nano-particle serving as a core, a non-magnetic middle protective layer wrapping the core and a shell layer loaded on the middle protective layer, the shell layer comprises a visible light driven photocatalyst material BiOBrxI1-x, and the visible light driven photocatalyst material BiOBrxI1-x is a visible light driven photocatalyst material BiOBrxI1-x. Wherein x is the weight ratio of bromine to the total amount of halogen bromine and iodine, and x ranges from 0 to 1. The photocatalyst composite particle can be used for treating water containing pollutants such as drugs and / or personal care products, and can be used for quickly and efficiently carrying out photocatalytic degradation on the pollutants under the driving of visible light; and moreover, the photocatalyst composite particles can be quickly and conveniently recycled from a water-containing medium through a magnetic separation technology so as to be recycled.

The invention provides a method for measuring iodine in a regional geochemical survey sample, and belongs to the technical field of measuring methods. The iodine content in the sample is determined by adopting a spectrophotometric method. The method comprises the following steps: mixing a sample with an Eschka mixed solvent, heating and melting through a program, extracting in a water bath, and fixing the volume; taking supernate, sequentially adding sodium carbonate, acetic acid, tetraalkali and chloramine T solution for color development, and measuring the absorbance in a cuvette with the wavelength of 600nm and the length of 1cm or 3cm. Drawing a standard curve through an iodine standard solution, and calculating the iodine content of the sample according to the absorbance after the blank is deducted. The method is low in detection limit, high in accuracy and good in precision. The method is easy to operate, low in cost, superior to the existing national standard in efficiency, suitable for analysis and test of large-batch geochemical sample iodine and wide in application prospect.

The present invention belongs to the technical field of Cl, Br and I detection, comprising: (1) placing a substance to be determined in a sample container, laying asbestos on the surface of the substance to be determined and then conducting pyrohydrolysis treatment: firstly, optionally, preheating for 3-10 min at 500-600° C., heating for 3-10 min at 700-800° C., and then burning for 10-30 min at 1000-1100° C.; (2) obtaining the standard curves of the corresponding concentration value and the net strength value of each element; and (3) testing the net strength of the liquid in step (1) using ICP-MS combined with an online internal standard method, and combining with the standard curves to obtain the contents of chlorine, bromine and iodine in the substance to be determined. The method of the present invention can avoid a deflagration phenomenon, is simple, rapid and high in detection accuracy.