46 results about "Iodine" patented technology

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 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 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.

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

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 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 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.

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 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 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.

A process for producing a nonionic N-vinyl butyrolactam iodine with high stability, characterized in that nonionic N-vinyl butyrolactam, iodine and abrasive aid are stirred at a temperature of 50°C to 90°C and a stirring speed of 150 to 800 rpm for 1 to 12 hours to produce the nonionic N-vinyl butyrolactam iodine with high stability, wherein the nonionic N-vinyl butyrolactam has a K-value of 32±1, a PD-value of the main peak of ≤ 1.6, and a water content of ≤ 2.5%, wherein the abrasive aid comprises sodium citrate.

A stable trace element composition, its preparation method, and its use are disclosed. The trace element composition comprises a main material and auxiliary materials. The main material comprises pharmaceutical organic acid salts of iron, zinc, copper, and manganese, pharmaceutical salts of fluorine, iodine, selenium, and molybdenum, and a pharmaceutical organic or inorganic salt of chromium. The auxiliary materials comprise water for injection and a pH adjuster, which is an inorganic acid. The pH value of the trace element composition is 2.0 to 3.5. The amount of each trace element per 10 mL of the trace element composition is (unit: μmol): 17.8 to 21.5 μmol iron, 40 to 100 μmol zinc, 4.7 to 9.6 μmol copper, 1 μmol manganese, 25 to 60 μmol fluorine, 0.5 to 1.2 μmol iodine, 0.75 to 1.27 μmol selenium, 0.2 to 0.26 μmol molybdenum, and 0.2 to 0.4 μmol chromium.

The present invention relates to a method for recovering iodine from a solution of phosphoric acid, the method comprising the following steps: a) providing a solution of phosphoric acid comprising dissolved iodine, the concentration of iodine in the solution being at least 30 ppm; b) oxidizing the solution of phosphoric acid so as to convert the dissolved iodine into volatile iodine; c) blowing air to carry the volatile iodine from the oxidized solution resulting from step b) into an absorption column; d) in the absorption column, absorbing the volatile iodine in a solution comprising an absorbent; e) concentrating the solution resulting from step d) via reverse osmosis, liquid-liquid extraction or chemical precipitation; f) precipitating and recovering crystals of diiodine or an iodine salt.

The utility model relates to the field of desublimation devices, particularly discloses a desublimation device for refining iodine, and solves the technical problem that iodine is easy to attach to a heat exchange coil in the use process of the conventional desublimation device for refining iodine, so that the normal operation of a system is influenced. Comprising an inner kettle body which is provided with a cold air inlet pipe, a hot air inlet pipe and a first accommodating cavity; the outer kettle body is arranged on the outer side of the inner kettle body in a sleeving manner, is provided with a liquid inlet pipe and a liquid outlet pipe, and is provided with a second accommodating cavity isolated from the first accommodating cavity; the collecting tank is arranged close to the bottom of the inner kettle body and is provided with a third accommodating cavity which is not communicated with the outside, and the third accommodating cavity is communicated with the first accommodating cavity. According to the desublimation device disclosed by the utility model, structures such as a heat exchange coil pipe in the desublimation device are omitted, and the adhesion of materials in the device is reduced.

This invention discloses a method for preparing an amino acid-based metal cation adsorbent and its application. This invention belongs to the technical field of radioactive waste gas treatment and functional adsorbent materials. The amino acid-based metal cation adsorbent prepared by this invention is a composite material in which an amino acid-based metal cation ionic liquid is mounted on a three-dimensional porous substrate. Through the synergistic mechanism of mass transfer from the three-dimensional porous substrate and chemical complexation and physical dissolution of the ionic liquid, it achieves efficient capture and irreversible fixation of elemental iodine (I2) and iodine aerosol in nuclear medical waste gas. The material is prepared under mild conditions, without the need for high temperature and high pressure, has stable chemical properties, and the production process is green, pollution-free, and easy to control. It exhibits excellent application effects in the fields of nuclear medical iodine waste gas and iodine aerosol purification, providing an efficient, low-cost, and easily industrialized solution for the treatment of radioactive iodine waste gas in nuclear medical settings.

The application relates to the technical field of radioisotope preparation, and particularly discloses a preparation device and method for radioisotope iodine-131; the preparation device comprises a dry distillation furnace, the dry distillation furnace comprises a heating furnace and a furnace pipe; the heating furnace comprises a heating furnace body and a furnace cover, a furnace cavity is formed in the heating furnace body, an opening for realizing the communication between the furnace cavity and an external space is arranged on the heating furnace body, and the furnace cover is detachably connected with the heating furnace body to realize the sealing of the opening; the furnace pipe is arranged in the furnace cavity, and the furnace pipe comprises a containing pipe body and a furnace pipe cover; the containing pipe body is used for placing a boat, a taking and placing opening for taking and placing the boat is arranged on the containing pipe body, and the furnace pipe cover is detachably connected with the containing pipe body to realize the sealing of the taking and placing opening. The application not only can meet the needs of mass production, has high production efficiency, and has simple structure and easy operation, can reduce the equipment size, and effectively reduces the risk of leakage of the present radioactive gas.

The application belongs to the field of perovskite material preparation, and discloses a method for enhancing perovskite surface Raman. Specifically, ITO conductive glass on which a perovskite precursor solution is spin-coated is heated and annealed to crystallize into a film, and then subjected to oxygen plasma treatment. The experimental process of the application is simple, that is, by short-time contact between oxygen and the perovskite film, the negative-valence iodine (non-lattice iodine) in the film will preferentially react with oxygen to generate pentavalent iodine, thereby filling the deep energy level defects in the film caused by the negative-valence iodine without destroying the lattice structure, which promotes the charge transfer process, so that the Raman enhancement of the perovskite film mainly based on chemical enhancement is further improved. The application improves the surface Raman enhancement factor of perovskite, has high repeatability, saves energy, and fills the internal energy level defects, and also promotes the interface charge transfer of perovskite solar energy.

The application relates to a treatment device and method for iodine contrast agent residual waste, and relates to the technical field of medical waste treatment.The device comprises a pretreatment assembly, a degradation assembly and a separation assembly.The pretreatment assembly is used for collecting and pretreating the iodine contrast agent residual waste, the degradation assembly is used for degrading the pretreated waste, and the separation assembly is used for separating the degradation product.The pretreatment assembly, the degradation assembly and the separation assembly are combined to realize the collection and treatment of the iodine contrast agent residual waste, improve the treatment efficiency of the iodine contrast agent residual waste, and reduce the probability of directly discharging the iodine contrast agent residual waste to pollute the environment.

The invention discloses a triangulated amine macrocyclic adsorption material and a synthesis method and application thereof, and belongs to the technical field of adsorption materials, the structural general formula of the triangulated amine macrocyclic adsorption material is any one of the following formulas, . The triangulated amine macrocyclic adsorption material shows efficient adsorption capacity to iodine in practical application, also has excellent cycle stability, can be repeatedly used through simple treatment, realizes capture and desorption of iodine, can improve the environmental adaptability and prolong the cycle service life, and has a wide application prospect. The invention provides a research basis for the practical application of the adsorbent as an efficient and durable adsorbent in nuclear waste treatment, and particularly shows comprehensive performance advantages in the aspect of radioactive iodine adsorption.

The scheme provides a device and application for concentrated sulfuric acid decomposition in sulfur-iodine cycle hydrogen production, the device comprises a tubular shell, a plurality of vertical heat exchange pipes for heating and decomposing concentrated sulfuric acid and a heat insulation layer are arranged in the shell; the heat exchange pipes penetrate through the heating area and the heat insulation layer, and connect the space in the overhead pipe box with the bottom pipe box; the heat exchange pipes comprise an inner pipe made of silicon carbide, and the inner pipe is sleeved with an outer pipe; a sealing ring is arranged at a specific height position between the inner wall of the outer pipe and the outer wall of the inner pipe, and molten salt is arranged between the inner wall of the outer pipe and the outer wall of the inner pipe; all tube plates of the outer pipe are integrally welded and connected. The application proposes a unique heat exchange pipe structure, the inner and outer pipes are liquid sealed through the sealing ring and the molten salt, and the problem that the silicon carbide heat exchange pipe and the tube plate are difficult to be sealingly connected under high temperature and high pressure is solved.

This invention discloses a hierarchical porous HKUST-1 material for efficient iodine capture and its hydrothermal synthesis method. The synthesis process involves sequentially dissolving a template agent, carboxylic acid, and sodium perchlorate in water, then adding a copper source and an organic ligand. The mixture is reacted at 90°C for 24 hours. After the reaction, the solid is separated by centrifugation, the template agent is removed by Soxhlet extraction, and the material is dried to obtain the hierarchical porous HKUST-1 material. The hierarchical porous HKUST-1 material synthesized by this invention has ordered mesopores with a size of 8-20 nm, which promotes rapid iodine transfer within the material and provides more storage space, thereby achieving efficient iodine capture.

The invention relates to the technical field of lead iodide materials, and discloses a method for testing the molar ratio of lead to iodine in a lead iodide material, the lead iodide material comprises a lead iodide main component and impurities, the chemical formula of the lead iodide main component is PbxIy, the ratio of x to y is the molar ratio of lead to iodine in the lead iodide main component, and x is greater than or equal to 1. The mass percentage of the impurities in the lead iodide material is greater than or equal to 0 wt%; the test method comprises the following steps: carrying out X-ray diffraction test on the lead iodide material to obtain the variety and mass percentage of impurities; the method comprises the following steps: weighing a lead iodide material with the mass of m0, carrying out an inductively coupled plasma test to obtain the mass m1 of a lead element in the lead iodide material, obtaining the mass of an iodine element in the main component of lead iodide through the mass percentage of impurities, m0 and m1, and further obtaining the ratio of x to y in the main component of lead iodide. By adopting the test method, the test accuracy can be effectively improved, and the quality of lead iodide can be effectively ensured.

The application discloses a kind of triazinamine macrocycle adsorption materials and its synthesis method and application, which belong to the technical field of adsorption material, wherein the structure general formula of the triazinamine macrocycle adsorption material is any one of the following formula:;The triazinamine macrocycle adsorption material shows high adsorption capacity to iodine in practical application, and the triazinamine macrocycle adsorption material also has excellent cycle stability, can be reused by simple treatment, realizes the capture and desorption of iodine, can improve environmental adaptability and cycle service life, provides research basis for its practical application as efficient, durable adsorbent in nuclear waste treatment, especially shows comprehensive performance advantage in radioactive iodine adsorption.

A method comprises: introducing a vapor of an oxygen and iodine-containing etching compound into a chamber that contains a substrate having a silicon-containing film deposited thereon and a patterned mask layer deposited on the silicon-containing layer, wherein the oxygen and iodine-containing etching compound has the formula CnHxFylzOe, wherein 0 ≤ n ≤ 10, 0 ≤ x ≤ 21, 0 ≤ y ≤ 21, 1 ≤ z ≤ 4 and 1 ≤ e ≤ 2; activating a plasma to produce an activated oxygen and iodine-containing etching compound; and allowing an etching reaction to proceed between the activated oxygen and iodine-containing etching compound and the silicon-containing film to selectively etch the silicon-containing film from the patterned mask layer, thereby forming a patterned structure.

An inorganic material in a form of open-porosity particles, each of the particles comprising a lead vanadate or phosphovanadate of formula Pb3-xXx(VO4)2-2y(PO4)2y, wherein x=0 or x>0 but ≤0.33; y=0 or y>0 but <1; X=Ba2+, Ca2+, Sr2+ or Cd2+; and metallic lead or a lead salt. A method for preparing the material, a method for capturing iodine present in a gaseous effluent as well as a method for conditioning iodine present in a gaseous effluent in a form of an iodoapatite.

The invention discloses a method for recovering iodine in a polaroid based on supercritical CO2 fluid, which comprises the following steps: pretreatment: crushing a waste polaroid, cleaning to remove surface impurities, adding water, mixing with ethylene glycol, and putting into an extraction kettle; supercritical fluid preparation: pressurizing and heating liquid CO2 to form supercritical CO2 fluid; extraction: introducing supercritical CO2 into an extraction kettle filled with polaroid particles, and circularly extracting; separation: reducing the pressure of the extracted fluid to normal pressure to obtain a solution containing iodine anions; cO2 recovery: the separated CO2 is subjected to condensation liquefaction and molecular sieve purification for recycling; and recovering the iodine elementary substance: acidifying and oxidizing the solution, extracting with CCl4, and carrying out reduced pressure evaporation to recover the iodine elementary substance. Through the application of the supercritical CO2 fluid, a remarkable breakthrough is achieved in the field of recycling of the waste polaroid, and compared with a traditional recycling process depending on organic solvent dissolution or high-temperature cracking, the technology utilizes the physical characteristics of CO2, and efficient recycling of iodine elements is achieved.