77 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 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.

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.

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.

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.

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.

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.

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.

The invention discloses a method for determining trace iodine in brine, which comprises the following steps: step 1, fixing the volume of a sample, dropwise adding sulfuric acid and a sodium nitrite solution, uniformly shaking, and standing, step 2, adding chloroform, carrying out oscillation treatment, and standing for clarification, step 3, separating clarified liquid and transferring a chloroform layer into a colorimetric tube, step 4, heating in a water bath to volatilize the chloroform to obtain pure iodine, 5, determining the intensity by adopting an inductively coupled plasma spectrometry; the trace iodine in the brine is separated by utilizing a sodium nitrite-chloroform extraction method, the operation is relatively simple and convenient, the accuracy is high, the iodine is in a special dark purple color after being dissolved, the observation is convenient, the sample pretreatment is simple and convenient, the influence of matrix salt is eliminated, the chloroform elimination process adopts mild and easy-to-control water bath heating, the system is stable, and the method is suitable for industrial production. The integrity of the sample can be kept.

The invention provides a device for decomposing concentrated sulfuric acid in sulfur-iodine circulating hydrogen production and application. The device comprises a tubular shell, and a plurality of vertical heat exchange tubes and heat insulation layers for heating and decomposing concentrated sulfuric acid are arranged in the shell; the heat exchange tube penetrates through the heating area and the heat insulation layer, and the space in the tower top tube box is communicated with the tower bottom tube box; the heat exchange tube comprises an inner tube made of a silicon carbide material, and an outer tube is sleeved outside the inner tube; 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 placed between the inner wall of the outer pipe and the outer wall of the inner pipe; all the tube plates of the outer tube are integrally welded and connected. The unique heat exchange tube structure is provided, liquid sealing is conducted on the inner tube and the outer tube through the sealing ring and the molten salt, and the problem that the silicon carbide heat exchange tube and the tube plate are difficult to be connected in a sealed mode at high temperature and high pressure is solved.

The invention discloses a zero-dimensional tetranuclear copper iodine cluster organic-inorganic hybrid crystalline scintillator material and a preparation method and application thereof, and belongs to the field of materials. The chemical formula of the organic and inorganic hybrid crystalline scintillator material is (p-ttp) 4Cu4I4, wherein p-ttp is p-methyl triphenylphosphine. The organic-inorganic hybrid crystalline scintillator material is based on a zero-dimensional Cu4I4 cluster structure, utilizes the heavy atom effect of Cu and I to enhance X-ray absorption, and has yellow-green light emission (506nm). The photoyield is high, the response is quick, the linear response is good, and the thermal stability is strong. Copper is used for replacing lead, so that the toxicity is reduced, and the development trend of green materials is met. The process is simple, low in cost and easy to industrialize. The device can be applied to X-ray irradiation detection and can also be applied to illumination display industries such as OLEDs (Organic Light Emitting Diodes) and the like. And the method adapts to various application scenes.

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.

A device for measuring gaseous iodine adsorption comprises a gaseous iodine adsorption bin, the gaseous iodine adsorption bin is a glass container, a spring is suspended in the gaseous iodine adsorption bin, the lower end of the spring is connected with a glass bottle, an adsorbent for adsorbing gaseous iodine is placed in the glass bottle, the lower end of the spring is further connected with a measuring claw, and the side face of the gaseous iodine adsorption bin is provided with a graduated scale for indicating the length change of the spring. The upper part of the gaseous iodine adsorption bin communicates with the outlet end of the gas-guide tube; the iodine sample placing bin is used for placing an iodine sample for testing, and the top of the iodine sample placing bin is communicated with the gas-guide tube through a first valve; the top of the heating bin communicates with the gas guide pipe through a second valve, and a heating device and a sensor assembly for monitoring the pressure and temperature in the device are arranged in the heating bin; the air suction pipeline is communicated with the air guide pipe through a third valve and is connected with an air suction device; and the controller is used for being connected with the heating device and the sensor assembly. The device is simple in structure and high in measurement precision, and suitable iodine adsorbents can be conveniently selected according to adsorption results.

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 invention relates to a method for recovering and purifying solid iodine from iodine-containing waste liquid, which comprises the following steps: 1) preparing crude iodine: adding hydrochloric acid and a hydrogen peroxide solution into the iodine-containing waste liquid to obtain crude iodine; 2) filtering: collecting crude iodine, filtering, and fully washing hydrogen peroxide and hydrochloric acid on the surface of the crude iodine by process water; the crude iodine is completely dissolved through an absolute methanol solution, the refined iodine is refined, and solid-liquid separation is carried out, and 4, evaporation is carried out, methanol is removed from the precipitated refined iodine in a low-temperature and micro-negative-pressure mode, and solid iodine.The whole structure is simple and reasonable, the experimental method is simple, the equipment requirement is small, the industrial investment cost is low, and practicability and high efficiency are achieved.