32results about "Alkali metal iodides" patented technology

The invention relates to the technical field of potassium iodide preparation, in particular to a cyclic preparation method which comprises the following steps: in an oxidation-reduction reaction system containing elemental iodine, potassium hydroxide and potassium formate, carrying out an oxidation-reduction reaction at a first temperature to obtain an oxidation-reduction reaction solution; adding a precipitant, carrying out precipitation reaction at a second temperature, and carrying out solid-liquid separation on the obtained reaction liquid to obtain a potassium iodide solution; carrying out evaporation concentration, cooling crystallization and solid-liquid separation on the potassium iodide solution to respectively obtain potassium iodide crystals and potassium iodide mother liquor, and adding the potassium iodide mother liquor into a redox reaction system; according to the mode, the potassium iodide is formed by adopting an oxidation reduction mode, the potassium iodide can be obtained by carrying out one-time reaction in one reaction system, then impurities are removed by utilizing the precipitant, only solid impurities and a solvent evaporated in the evaporation and concentration step leave the reaction system in the whole reaction process, and the cyclic utilization of raw materials is realized; the utilization rate of raw materials is improved.

The invention provides a method for resource utilization of iodine-containing organic waste and recovery of iodine, and belongs to the technical field of waste resource utilization. The method comprises the following steps: gasifying the iodine-containing organic waste at a high temperature of 1100-1750 DEG C in a pure oxygen atmosphere, and carrying out partial oxidation reaction, namely incomplete combustion, on the iodine-containing organic waste by controlling the oxygen amount to generate crude synthesis gas with H2, CO, CO2, H2O and HI as main components; the obtained crude synthesis gas is washed with water, HI is converted into a solution containing-1 valence iodide ions, then the iodide ions are further converted into iodized salt, recovery of iodine in the iodine-containing organic waste is achieved, and the difficulty and cost of the iodine recovery process are reduced; and in the high-temperature gasification process of 1100-1750 DEG C, hydrocarbon elements in the iodine-containing organic waste are converted into synthesis gas mainly comprising H2 and CO, so that resource utilization of the hydrocarbon elements can be realized, and secondary pollution cannot be caused.

To provide a method for manufacturing a metal iodide tablet in which contamination of a black substance is suppressed.SOLUTION: A metal iodide tablet manufacturing method includes a process in which metal iodide powders are compression-molded by use of a tableting machine. The tableting machine comprises an upper pestle, a mortar and a lower pestle in this order, and has a cap, which prevents the metal iodide powders from falling into the mortar, on the upper pestle.SELECTED DRAWING: Figure 1

This invention belongs to the field of potassium iodide aerosol preparation technology, specifically relating to a potassium iodide aerosol generating device. It includes a generating chamber, a recovery tank, and a vortex disk. The generating chamber houses a liquid supply assembly and a collection assembly. The liquid supply assembly includes a feed pipe with a spray assembly mounted on it. A long pipe is attached to the feed pipe, passing through a sleeve and a corrugated pipe before being inserted into a storage tank. The spray assembly includes a ball head, a spray pipe, and an inner cylinder. A small-diameter inlet is formed on the side wall of the spray pipe, and a large-diameter inlet is formed on the side wall of the inner cylinder. This invention uses a cylinder to move the feed pipe upwards, causing the spray nozzles on the spray pipe to rotate from the center of the vortex disk towards its edge, thus impacting the crystals within the grooves of the vortex disk. As the spray pipe rotates, the inner cylinder slides into the spray pipe, and the small-diameter inlet on the spray pipe and the large-diameter inlet on the inner cylinder gradually overlap, increasing the solution spray volume and enhancing the impact intensity.

A method for preparing photoactive perovskite materials. The method comprises the steps of: introducing a lead halide and a first solvent to a first vessel and contacting the lead halide with the first solvent to dissolve the lead halide to form a lead halide solution, introducing a Group 1 metal halide a second solvent into a second vessel and contacting the Group 1 metal halide with the second solvent to dissolve the Group 1 metal halide to form a Group 1 metal halide solution, and contacting the lead halide solution with the Group 1 metal halide solution to form a thin-film precursor ink. The method further comprises depositing the thin-film precursor ink onto a substrate, drying the thin-film precursor ink to form a thin film, annealing the thin film; and rinsing the thin film with a salt solution.

The utility model discloses a potassium iodide production and generation device which comprises a frame body, a reaction kettle is arranged on the lower side of the frame body, a heating bin is installed at the top of the frame body, electric heating pipes are embedded in the inner walls of the two sides of the heating bin, a stirring motor is installed at the top of the heating bin, and stirring blades are arranged in the heating bin. The utility model relates to the technical field of potassium iodide production, and has the beneficial effects that according to the technical scheme, the frame body is adopted as a main body, solid iodine is heated through the heating bin and is changed into a molten state, and the stirring blades are arranged on the frame body; then the iodine solution in the molten state can be fed into the transfer bin through the air pump, after the transfer bin is filled with the iodine solution, the iodine solution can be rapidly fed into the reaction kettle through cooperation of the exhaust fan and the atmospheric pressure, the iodine solution reacts with potassium oxide and water, and the device has the advantages of being simple in structure, convenient to meter and the like.

The invention relates to the technical field of potassium iodide preparation, in particular to a preparation method of potassium iodide, which comprises the following steps: firstly, adding a reduction solution into an iodine solution to carry out a first reaction to obtain a first reaction solution, then, carrying out solid-liquid separation on the first reaction solution to obtain a first reaction filtrate, and adding a potassium hydroxide solution into the first reaction filtrate to carry out a second reaction to obtain a second reaction solution; finally, carrying out solid-liquid separation on the second reaction liquid to obtain a potassium iodide solution; a mixed solution of potassium hydroxide and potassium formate is added into an iodine solution for a first reaction, and elemental iodine is reduced into iodide ions by using formate under an alkaline condition, so that the difficulty of generating elemental iodine by reaction of iodate ions and iodide ions is improved, the iodine leakage phenomenon is reduced, and the purity of potassium iodide is improved; meanwhile, the technological process is simple, and operation is convenient.

The invention relates to a method for recovering iodide waste, which comprises the following steps: carrying out activated carbon adsorption treatment on dissolved iodide waste, and carrying out solid-liquid separation to obtain an iodide solution; concentrating and crystallizing the iodide solution to obtain iodide crystal particles; the iodide crystal particles are sequentially subjected to vacuum heating and vacuum distillation, and the iodide with the purity being 4N or above is obtained. According to the method, other materials do not need to be added during recycling, the iodide with the purity of 4N or above can be obtained, waste recycling is achieved, the cost is reduced, pollution of the waste to the environment can be reduced, and green circulation is achieved.

The utility model discloses a roasting heating kettle structure for preparing potassium iodide, which relates to the technical field of roasting heating kettles and comprises a stirring rod arranged on the inner side of a roasting heating kettle main body connected with the stirring rod through a bearing. The device can prevent a potassium iodide raw material from spinning when the potassium iodide raw material is stirred by a stirring rod in the device by mounting the heat-conducting anti-rotation bracket, ensures that the potassium iodide raw material close to the heating pipe can be mixed with the potassium iodide raw material in the center of the device, improves the production efficiency of the device, and can play a role in heat preservation and heat insulation by mounting the embedded heat insulation layer; a large amount of heat in the device is effectively prevented from being transferred to the outside, energy consumption of the device is reduced, an external water pipe of the device can be added into the device by arranging a cooling tank, the upper part of the roasting heating kettle main body is cooled, reduction of the temperature in the device is accelerated, maintenance of the roasting heating kettle main body by workers is avoided, and the working efficiency is improved. The practicability of the device is enhanced.

The invention relates to a method for recovering thallium-doped iodide waste, which comprises the following steps: (1) dissolving the thallium-doped iodide waste to obtain a thallium-doped iodide solution; (2) carrying out adsorption treatment on the thallium-doped iodide solution by using activated carbon, and carrying out solid-liquid separation to obtain an iodide solution and iodide residues; (3) concentrating and crystallizing the iodide solution to obtain iodide crystal particles; the iodide crystal particles are sequentially subjected to first vacuum heating and first vacuum distillation, and iodide is obtained; and (4) sequentially carrying out second vacuum heating and second vacuum distillation on the iodide slag to obtain thallium iodide. According to the method provided by the invention, thallium in the thallium-doped iodide waste can be separated out, raw material recycling is realized, pollution of the waste to the environment can be reduced, and green circular economy can be realized through resource recycling.

The utility model discloses a potassium iodide producing and generating device which comprises a supporting frame and a plurality of reaction kettles, a rotating ring is arranged on the supporting frame in a rotating mode, a driving motor is arranged on the supporting frame through a rotating groove, the driving motor is connected with the rotating ring through a rotating mechanism, and sealing assemblies are arranged on the upper end faces of the reaction kettles through feeding ports. An electric valve is arranged at the bottom of the reaction kettle through a discharge port, a stirring shaft is rotationally mounted on the reaction kettle, a plurality of stirring rods are mounted on the stirring shaft, the plurality of stirring shafts rotationally penetrate through the rotating ring and extend to the upper part of the rotating ring, and the stirring shafts are connected with the support frame through a transmission mechanism. The production efficiency can be improved, a plurality of reaction kettles can be used for processing potassium iodide at the same time, the yield in unit time is greatly increased, and the requirement of large-scale production is met.

A method for preparing photoactive perovskite materials. The method comprises the steps of: introducing a lead halide and a first solvent to a first vessel and contacting the lead halide with the first solvent to dissolve the lead halide to form a lead halide solution, introducing a Group 1 metal halide a second solvent into a second vessel and contacting the Group 1 metal halide with the second solvent to dissolve the Group 1 metal halide to form a Group 1 metal halide solution, and contacting the lead halide solution with the Group 1 metal halide solution to form a thin-film precursor ink. The method further comprises depositing the thin-film precursor ink onto a substrate, drying the thin-film precursor ink to form a thin film, annealing the thin film; and rinsing the thin film with a salt solution.

One of the purposes of the present invention is to provide: a compound which can be used as a binder having ion conductivity; and a battery which contains the compound.　One aspect of the present invention is a compound which contains P and S as constituent elements and has both of a group containing at least one element that is bound to the P and is selected from the group consisting of O, N and a halogen and a disulfide bond.

Iodide nanoparticles are provided. The nanoparticles can be potassium iodide (KI) nanoparticles, and can be formed of, a radioisotope, preferably 131I or 125I. The nanoparticles can include a coating that can increase the half-life of the particles, serve as a platform for attachment or entrapment of targeting moieties and / or additional active agents, or a combination thereof. Methods of use are also provided. For example, a method of treating a subject for cancer can including sensitizing the subject to radiation therapy by administrating the iodide nanoparticles to the subject in combination with one or more doses of radiation therapy. Methods of treating or imaging a subject can also include administering the subject an effective amount iodide nanoparticles, without the nanoparticles serving as radiosensitizer. In such methods, the nanoparticles typically include a radioisotope or an anticancer active agent, for example 131I, 125I, 124I, or 123I, or a chemotherapeutic agent.

The present invention discloses an electric assisted heating type device for producing I-131, including a tubular furnace, a distillation absorber, a purifier, a circulating water cooling tank, a peristaltic pump, a liquid storage bottle, a bracket and a stand. The tubular furnace is horizontally arranged on the table top of the stand, the purifier, the circulating water cooling tank, and the liquid storage bottle are arranged on the bottom plate of the stand, the peristaltic pump is arranged on one side of the stand, the bracket is fixedly arranged under the table top, a part of the distillation absorber is arranged in the tubular furnace, and the other part is arranged under the table top and placed on the bracket, the distillation absorber is connected to the peristaltic pump and the liquid storage bottle in turn through pipelines, and is also connected to the purifier and the circulating water cooling tank through pipelines. The production device of the present invention adopts a compressed air drive instead of a vacuum pump and an electric heating sleeve to heat the carrier gas throughout the whole process, so as to realize the efficient absorption of radioactive iodine-131 in the high-temperature carrier gas, and eliminate the influence of vacuum pump failure on production and the generation of pump-related radioactive waste, which is more conducive to safe production.

The invention discloses a method for treating materials for preparing sodium iodide, which comprises the following steps: firstly, dissolving sodium hydroxide by using a mixed solution of ethanol and water under the protection of nitrogen, heating, and then adding elemental iodine to react to generate sodium iodide; secondly, adding a composite catalyst, and stirring for 25-35 minutes to promote reaction; then, a silver nitrate solution is added to remove an unreacted iodine source, a filtration and concentration cooling method is adopted to promote sodium iodide crystals to be separated out, and the process is repeated at least twice to improve the product purity; finally, the obtained sodium iodide crystals are placed in a supercritical carbon dioxide drying device to be efficiently dried at low temperature, according to the method, by controlling reaction conditions, introducing an efficient composite catalyst and applying an advanced drying technology, the yield and purity of sodium iodide are effectively improved, and the stability and quality of a final product are remarkably improved; compared with a traditional method, the process has the advantages that the impurity content can be remarkably reduced while the high yield is guaranteed, and purer raw materials are provided for subsequent steps.

The invention discloses a method for trapping radioactive iodine and compounds thereof. The trapping method comprises the following steps: acquiring molten salt in a molten state; introducing tail gas containing radioactive iodine and compounds thereof into the fused salt, and enabling the tail gas to be in full contact with the fused salt and react with the fused salt; after the reaction is completed, separating iodine-containing products captured in the molten salt; new fused salt is supplemented into the fused salt from which the iodine-containing product is separated, the fused salt in the molten state is obtained again, and the steps are repeated. According to the trapping method, after molten salt in a molten state is obtained, tail gas containing radioactive iodine and compounds of the radioactive iodine is introduced into the molten salt, and trapping is achieved through the reaction of the iodine and the compounds of the radioactive iodine in the high-temperature molten salt; an iodine-containing product in the reacted molten salt is separated and purified, and the purified molten salt can be continuously used; the trapping method has the advantages of being high in trapping efficiency, low in cost, simple and convenient in process, capable of effectively reducing secondary waste and the like.

Presented herein are, infer alia, electrolytes for electrochemical cells, such as lithium sulfur secondary batteries. The electrolytes comprise one or more lithium salts. One or more of the lithium salts is lithium iodide. Lithium iodide is a primary electrolytic salt. Secondary batteries that include the disclosed electrolytes are also disclosed.

A method of preparing a photoactive perovskite material.SOLUTION: Contacting lead halide with a first solvent to dissolve the lead halide and form a lead halide solution; contacting a Group 1 metal halide with a second solvent; Dissolving the Group 1 metal halide to form a Group 1 metal halide solution; and contacting the lead halide solution with the Group 1 metal halide solution to form the thin film precursor ink; depositing the thin film precursor ink on a substrate; drying the thin film precursor ink to form a thin film; annealing the thin film; and immersing the thin film in a salt solution comprising a third solvent and a salt selected from a specified group.SELECTED DRAWING: Figure 1

A method for recovering at least one component from a perovskite-containing structure comprising a perovskite material ABX3, the method comprising the steps of: preparing a functional solution, treating the perovskite-containing structure with the functional solution to dissolve the perovskite material and to obtain a reaction mixture, adding a complementary solvent to the reaction mixture, obtaining a precipitate containing the component to be recovered, separating the component to be recovered from the reaction mixture, collecting the component, characterized in that the functional solution comprises a protic ionic liquid.

The present invention discloses a method for recovering iodine from a solution with a low iodine content, comprising the following steps: S1. Adding an acid to the iodine-containing solution to adjust the pH value, and adding an oxidizing agent or a reducing agent to adjust the potential to obtain solution A; S2. Mixing solution A with an organic solvent to obtain reaction solution B; S3. Performing a layering treatment on reaction solution B to obtain an organic phase C and an aqueous phase D; S4. Passing the organic phase C through a chromatography column, and all the iodine in the organic phase C can be adsorbed on the chromatography column; S5. Eluting and refining the iodine on the chromatography column. The method of the present invention avoids the problems of incomplete iodine recovery or low efficiency, solves the problem of treating a solution with a low iodine content, recovers a large amount of iodine, improves production efficiency, and is extremely easy to automate throughout the process.

One of the purposes of the present invention is to provide: a compound which can be used as a binder having ion conductivity; and a battery which contains the compound. One aspect of the present invention is a compound comprising P and S as constituent elements, a group comprising one or more elements selected from the group consisting of O, N and halogen, the group bonding to the P, and a disulfide bond.

The invention belongs to the technical field of potassium iodide aerosol preparation, and particularly relates to a potassium iodide aerosol generating device. The device comprises a generation box, a recovery pool and a vortex disc, wherein a liquid supply assembly and a collection assembly are mounted in the generation box; the liquid supply assembly comprises a material pipe, an injection assembly is installed on the material pipe, a long pipe is installed on the material pipe, and the long pipe penetrates through a pipe sleeve and a corrugated pipe to be inserted into the liquid storage tank; the spraying assembly comprises a ball head, a liquid spraying pipe and an inner cylinder, a small-aperture liquid inlet is formed in the side wall of the liquid spraying pipe, and a large-aperture liquid inlet is formed in the side wall of the inner cylinder. The air cylinder drives the material pipe to move upwards, the material pipe drives the liquid spraying opening in the liquid spraying pipe to rotate from the circle center position of the vortex disc to the edge direction of the vortex disc, and a solution impacts crystals in a groove of the vortex disc. Along with rotation of the liquid spraying pipe, the inner cylinder slides into the liquid spraying pipe, the small-aperture liquid inlet in the liquid spraying pipe and the large-aperture liquid inlet in the inner cylinder are gradually overlapped, namely, the solution spraying amount is increased, and the impact strength is improved.

The application discloses a preparation method of potassium iodide and ammonium iodide based on micro-chemical reaction technology, and comprises the following steps: (1) mixing hydrazine hydrate and potassium hydroxide according to a molar ratio of 4:1-1:8 to prepare 0.5 mol·L ‑1 Solution as the dispersed phase of the micro-reactor; (2) dispersing elemental iodine into water according to a molar ratio of 1:60-1:500 to prepare a suspension as the continuous phase; (3) pumping the solution prepared in the step 1 into the dispersed phase inlet at the same flow rate, pumping the iodine suspension prepared in the step 2 into the continuous phase, and carrying out reaction at normal temperature; and potassium iodide and ammonium iodide products can be obtained after concentration, crystallization and separation. The application realizes continuous, safe and efficient production of potassium iodide and ammonium iodide by using micro-chemical continuous reaction technology, and by skillfully selecting hydrazine hydrate as a reducing agent, potassium hydroxide as a pH regulator of a reaction system, and optimizing the raw material ratio and the feeding flow rate of the three.

A method for preparing photoactive perovskite materials. The method comprises the steps of: introducing a lead halide and a first solvent to a first vessel and contacting the lead halide with the first solvent to dissolve the lead halide to form a lead halide solution, introducing a Group 1 metal halide a second solvent into a second vessel and contacting the Group 1 metal halide with the second solvent to dissolve the Group 1 metal halide to form a Group 1 metal halide solution, and contacting the lead halide solution with the Group 1 metal halide solution to form a thin-film precursor ink. The method further comprises depositing the thin-film precursor ink onto a substrate, drying the thin-film precursor ink to form a thin film, annealing the thin film; and rinsing the thin film with a salt solution.

A method for preparing photoactive perovskite materials. The method comprises the steps of: introducing a lead halide and a first solvent to a first vessel and contacting the lead halide with the first solvent to dissolve the lead halide to form a lead halide solution, introducing a Group 1 metal halide a second solvent into a second vessel and contacting the Group 1 metal halide with the second solvent to dissolve the Group 1 metal halide to form a Group 1 metal halide solution, and contacting the lead halide solution with the Group 1 metal halide solution to form a thin-film precursor ink. The method further comprises depositing the thin-film precursor ink onto a substrate, drying the thin-film precursor ink to form a thin film, annealing the thin film; and rinsing the thin film with a salt solution.

To provide a processing method of a polarizer production waste liquid capable of efficiently recovering boric acid while suppressing generation of wastes on recovery of potassium iodide from a polarizer production waste liquid.SOLUTION: A processing method of a polarizer production waste liquid for recovery of potassium iodide and boric acid from a polarizer production waste liquid includes a KI recovery step of recovering a first filtrate containing potassium iodide by evaporative concentration of the polarizer production waste liquid, followed by solid liquid separation of a first precipitate having been formed; and a boric acid recovery step of recovering boric acid from the first precipitate. The boric acid recovery step includes a cooling crystallization step of precipitation of boric acid crystal by acid addition to a target liquid where the first precipitate is dissolved for pH control, followed by cooling; a crystal separation step of separating boric acid crystal having been precipitated; and an electrodialysis step of recovering an acid and an alkali by alkali addition to a target liquid from which boric acid crystal has been separated, followed by neutralization and electrodialysis.SELECTED DRAWING: Figure 2

The invention relates to a process method for zero discharge treatment of acrylonitrile flue gas desulfurization wastewater. The process method comprises a pretreatment section, a main reaction section and a deep treatment section, the pretreatment section comprises a molybdenum removal unit, an adjusting hardness removal unit, a tubular microfiltration unit and a sludge thickening, dewatering and drying unit; the main reaction section comprises an electrodialysis unit, a primary anaerobic unit, a secondary anaerobic unit, an incineration boiler unit, a flue gas desulfurization unit, a multi-effect evaporation unit and a crystallization and salt separation system; the deep treatment section comprises a Fenton oxidation unit, a nanofiltration unit and a neutralization unit; the electrodialysis unit adopts a polydopamine modified anion exchange membrane; the improved electrodialysis realizes the separation of organic matters and salt and the concentration of the salt, so that the anti-pollution capability is greatly improved, the subsequent anaerobic treatment is facilitated, and the content of the organic matters in the salt separation section is also reduced; in the whole process method, waste water is recycled, waste gas can be used as fuel, salt is converted into sodium sulfate and sodium chloride products, and water, gas and solid are integrally recycled.

To provide a compound capable of being used as a binder having ion conductivity and a battery including the compound. One of the present invention is a compound including P and S as constituent elements, and having: a group bonded to the above P and including one or more elements selected from the group consisting of O, N, and halogen; and a disulfide bond.