82 results about "Hydrogen iodide" patented technology

The invention discloses an alpha, omega-diiodo perfluoroalkane derivative, an alpha, omega-diiodo ethyl perfluoroalkane derivative as well as a preparation method and application of the alpha, omega-diiodo perfluoroalkane derivative and the alpha, omega-diiodo ethyl perfluoroalkane derivative. According to the method, alpha, omega-diiodo perfluoroalkane is taken as a raw material, and the alpha, omega-diiodo perfluoroalkane and ethylene are subjected to free radical addition reaction under the action of an initiator and a solvent to prepare the alpha, omega-diiodo ethyl perfluoroalkane. The alpha, omega-diiodoethyl perfluoroalkane and alkali are subjected to a one-molecule and / or two-molecule hydrogen iodide hydride elimination reaction, and alpha, omega-iodoethyl vinyl perfluoroalkane and / or alpha, omega-divinyl perfluoroalkane are / is generated. The method is simple and convenient to operate, the raw material utilization rate and the target product yield are high, the preparation cost is effectively reduced, and the industrial production requirement is met. The alpha, omega-diiodo perfluoroalkane derivative or alpha, omega-diiodo ethyl perfluoroalkane derivative prepared by the method disclosed by the invention can be used as a vulcanization point monomer for preparing peroxide vulcanized fluororubber, and compared with common rubber, the rubber has more excellent compression deformation performance, strength and medium resistance and has a wide application prospect.

The invention relates to the technical field of sulfur-iodine circulating hydrogen production, in particular to a thermochemical iodine-sulfur-barium circulating hydrogen production process and a thermochemical iodine-sulfur-barium circulating hydrogen production system, which comprises the following steps: reacting excessive Ba < 2 + > with sulfuric acid in a Bunsen reaction product to obtain barium sulfate so as to obtain a first reaction mixed solution containing HI, BaSO4, H2O, BaI2 and a small amount of unreacted I2; sequentially carrying out cyclone separation, liquid removal and filter pressing to obtain a barium sulfate filter cake and a second mixed solution containing HI, H2O and BaI2; the method comprises the following steps: crushing a barium sulfate filter cake, performing high-temperature decomposition, returning gas generated by decomposition to participate in Bunsen reaction, and dissolving BaO generated by decomposition into Ba < 2 + >; and reboiling the second mixed solution to obtain hydrogen iodide steam, cooling a product obtained by decomposing the hydrogen iodide steam, carrying out gas-liquid separation to obtain hydrogen, and returning liquid obtained by gas-liquid separation to participate in the Bunsen reaction of the next cycle. Barium circulation is introduced, the process is simplified, the dosage of elemental iodine is reduced, and the cost is low.

The invention discloses a preparation method of high-purity diiodosilane, which comprises the following steps: firstly, preparing a p-phenylsilane solution from phenyl trichlorosilane and sodium hydride as raw materials, rectifying and purifying the p-phenylsilane solution, directly reacting the p-phenylsilane solution with iodine to generate diiodosilane, and reacting phenylsilane with iodine to directly generate diiodosilane; in the process of preparing diiodosilane from phenylsilane, conditions are mild, the reaction process is controllable, the reaction time is shortened by controlling the temperature in the synthesis process and increasing the pressure of a reaction system, hydrogen iodide overflow is reduced, sodium hydride is adopted as a reducing agent in the reaction process, and the yield of diiodosilane is increased. The solid waste can be recycled, the cost can be effectively reduced, and industrialization of diiodosilane is facilitated.

The present disclosure provides an integrated process for producing trifluoroiodomethane (CF3I), in three steps: a) reacting a first reactant stream comprising hydrogen (H2) and iodine (I2) in the presence of a first catalyst to produce a first product stream comprising hydrogen iodide (HI); (b) reacting the first product stream with a second reactant stream comprising trifluoroacetyl chloride (TFAC) in the presence of a second catalyst to produce an intermediate product stream comprising trifluoroacetyl iodide (TFAI); and (c) reacting the intermediate product stream to produce a final product stream comprising trifluoroiodomethane. (CF3I).

Sulfur species may be processed using an ionic liquid, a deep eutectic solvent, or a combination of both. An example of a method of such processing may include: supplying a first reaction medium including an iodine species and a first catalyst, wherein the first catalyst includes a first deep eutectic solvent, a first ionic liquid, or a first mixture of both; contacting the reaction medium with a first sulfur species, wherein the first sulfur species includes hydrogen sulfide, a sulfur-containing hydrocarbon, or any combination thereof; and reacting the first sulfur species with the reaction medium to produce a second sulfur species, hydrogen iodide, or a combination thereof.

The present invention discloses a fast-coloring hair dye and a preparation method thereof. A fast-coloring hair dye is a two-component oxidative hair dye, including a coloring agent and a developer; the coloring agent contains oxidation dyes, an alkali agent, a co-dyeing agent, and a hair conditioning agent. Among them, the alkali agent includes but is not limited to ammonium hydroxide and diethanolamine, the co-dyeing agent is a compound of alginate, potassium iodide, and hydrogen iodide, and the hair conditioning agent is a compound of extract of Coccosphere, extract of oyster, and hydrolyzed silk protein; the developer contains a hydrogen peroxide solution. The preparation method of a fast-coloring hair dye lies in separately preparing the coloring agent and the developer to obtain the fast-coloring hair dye. The fast-coloring hair dye of the present application has the dual effects of fast hair dyeing and reducing the damage of the hair dye to the hair. After using the fast-coloring hair dye of the present application for hair dyeing, the hair can retain the color for a long time and remain bright and smooth.

Sulfur species may be processed using an ionic liquid, a deep eutectic solvent, or a combination of both. An example of a method of such processing may include: supplying a first reaction medium including an iodine species and a first catalyst, wherein the first catalyst includes a first deep eutectic solvent, a first ionic liquid, or a first mixture of both; contacting the reaction medium with a first sulfur species, wherein the first sulfur species includes hydrogen sulfide, a sulfur-containing hydrocarbon, or any combination thereof; and reacting the first sulfur species with the reaction medium to produce a second sulfur species, hydrogen iodide, or a combination thereof.

The invention discloses an organic-inorganic hybrid white light fluorescent material taking Cu (I) as a luminescence center, the chemical composition of the material is ACuX3, A represents positive divalent methyl phenyl piperazine cation [C11H18N2] < 2 + >, X is halogen ion Br <-> or I <->; a copper source, hydrogen bromide or hydrogen iodide and 1-phenylpiperazine or 1-phenylpiperazine salt are subjected to solvothermal reaction in methanol to prepare the 1-phenylpiperazine. The excitation wavelength of the material is 290-320 nm, the emission wavelength is 400-650 nm, the material belongs to a fluorescent material for emitting white light, the spectrum half-peak width is about 170 nm, the emission wavelength range is wide, the air stability and the thermal stability are good, the fluorescence performance is excellent, and the material has wide application prospects in the field of white light LEDs. The preparation method of the fluorescent material is easy and convenient to operate, the fluorescent material has good stability, meanwhile, the toxic element lead is replaced with the metal element copper, and harm to the human body and pollution to the environment are reduced.

The invention discloses a system and a method for absorbing sulfur dioxide in boiler flue gas. The system comprises a boiler induced draft fan outlet flue, a sulfur dioxide spraying and absorbing device and a flue gas discharging device, an outlet of the boiler induced draft fan outlet flue is connected with a first inlet of the sulfur dioxide spraying and absorbing device, and a first outlet of the sulfur dioxide spraying and absorbing device is connected with an inlet of the flue gas discharging device; the sulfur dioxide spraying absorption device is provided with a filler layer, a demisting device is arranged at a first outlet of the sulfur dioxide spraying absorption device, absorption liquid adopted by the sulfur dioxide spraying absorption device is a mixed solution of sulfuric acid, hydrogen iodide and iodine, and the mixed solution is located at the lower part of the sulfur dioxide spraying absorption device; a first inlet of the sulfur dioxide spraying and absorbing device is formed between the position above the liquid level of the mixed liquid and the filler layer; and flue gas from an outlet flue of the boiler induced draft fan passes through the filler layer and the demisting device to enter the flue gas emission device. The iodine solution is adopted to absorb sulfur dioxide in the boiler flue gas, and the atmospheric pollution gas sulfur dioxide is recycled.

The invention discloses a system and a method for generating power by utilizing sulfur dioxide in boiler flue gas. The system comprises a boiler induced draft fan rear flue, a sulfur dioxide absorption module and a flue gas emission module, the method comprises the following steps: flue gas discharged from a rear flue of a boiler induced draft fan enters a first inlet of a sulfur dioxide absorption module, an iodine solution of the sulfur dioxide absorption module is sprayed out from an atomizing nozzle from top to bottom and the flue gas from bottom to top, and a filler layer is arranged between the atomizing nozzle and the flue gas inlet to increase the contact between the flue gas and the iodine solution; iodine, sulfur dioxide and water react to generate a hydrogen iodide solution and a sulfuric acid solution, and flue gas with absorbed sulfur dioxide is discharged into the flue gas discharge module from a first outlet of the sulfur dioxide absorption module. Through the closed-loop process of iodine solution absorption-hydrogen iodide decomposition-hydrogen fuel cell power generation, the limitation that only pollutant removal is concerned in the traditional desulfurization technology is broken through.

The invention belongs to the technical field of material science and engineering, and relates to a method for preparing a high-orientation high-reflectivity graphene film through vapor pressure assisted stretching reduction, and the method comprises the following steps: carrying out isotropic stretching and vapor treatment on a graphene oxide film at the same time, namely heating a mixed solution of a hydrogen iodide aqueous solution and ethanol until the mixed solution is vaporized, and carrying out heat preservation at 90-120 DEG C for 6-24 hours, the volume ratio of the hydrogen iodide aqueous solution to the ethanol is 1: (2-5). According to the method, the graphene film is subjected to isotropic tensile stress in the reduction process, so that wrinkles and ripples generated by thermal fluctuation and interlayer spacing change are effectively eliminated, and the flatness of the graphene sheet layer is improved.

The invention discloses a process and system for separating and purifying hydrogen in sulfur-iodine circulating hydrogen production, and relates to the technical field of sulfur-iodine circulating hydrogen production, and the process comprises hydrogen iodide gas preheating, hydrogen iodide gas decomposition, gas heat recovery and cooling, pressurized separation, cryogenic separation, spraying absorption, and completion of hydrogen separation and purification. Multi-stage heat energy recovery is adopted, and the total energy consumption of the system is greatly reduced; complete recovery of the materials is achieved; hydrogen iodide liquefaction is assisted in a pressurization and copious cooling combined mode, energy consumption is greatly reduced, pressurization is generally needed when hydrogen is applied downstream, the hydrogen is pressurized in advance during separation and purification, and energy consumption needed by follow-up pressurization is reduced; materials except water are not added, so that impurities are avoided; and the undecomposed hydrogen iodide is circularly limited in the hydrogen separation process, so that the circulating energy consumption of other units of the system is reduced.

The invention provides a preparation method of superfine nickel powder, and relates to the field of powder material preparation. The method comprises the following steps: carrying out first-stage roasting on nickel particles in the presence of iodine vapor and an additive; wherein the additive is a combination of hydrogen iodide and chlorine; carrying out second-stage roasting on the first-stage roasting product in the presence of a mixed gas of hydrogen and hydrogen chloride; wherein the temperature of the second-stage roasting is 950-1150 DEG C, and the duration of the second-stage roasting is 1-3 hours; and the second-stage roasting product is cooled to the room temperature in the atmosphere of hydrogen and argon, and the superfine nickel powder is obtained. According to the method, the nickel powder is obtained by treating the nickel particles through iodination roasting, and meanwhile the iodine steam can be recycled. In addition, regulation and control of the process and impurity elements are further realized by introducing an additive in the roasting process.

The application relates to the fine chemical technology field and discloses a preparation method of 2-substituted-2,3-dihydro-4 H benzothiazine-4-ketone. The specific steps are as follows: 1,2-benzisothiazolin-3-ketone and carbonyl compound are used as raw materials, hydrogen iodide and ammonium iodide are used as important additives, one-step reaction is carried out in an organic solvent, and the target product can be obtained after purification. The method is simple in operation, high in yield and has potential application value.

The invention discloses an iodine separation device and method. The device comprises a sealing cover as well as a hot solution tank, a cold column, a scraper blade and an iodine collection device which are arranged in the sealing cover, the cold column is arranged at the upper part of the hot solution tank, one end of the scraper is connected to the iodine collecting device, and the other end is lapped on the outer surface of the cold column. The method comprises the steps that the pressure in the starting sealing cover is kept to be lower than one atmospheric pressure; the cold column is rotated, so that the scraping plate is tightly attached to the cold column; the surface temperature of the cold column is lower than 35 DEG C; a mixed solution of hydrogen iodide and iodine is injected into a hot solution tank, the temperature of the mixed solution is gradually increased, after the temperature reaches 44 DEG C or above, iodine begins to sublimate, iodine steam emerges from the mixed solution, and after the iodine steam upwards encounters the surface of a low-temperature cold column, the iodine is condensed on the surface of the cold column; in the rotating process of the cold column, iodine condensed on the surface of the cold column is shoveled and scraped by the scraping plate and falls off after reaching the scraping plate, and the iodine falls into the iodine collecting device along the scraping plate. The method has the advantages of being simple in technological process and low in energy consumption.

The present invention provides a graphene-composite copper conductive film for an electric heating film and a preparation method thereof. The method comprises adding graphene oxide to water and stirring to obtain a graphene oxide slurry; adding a copper sulfate solution to the graphene oxide slurry to obtain a graphene oxide / copper sulfate composite slurry; coating the graphene oxide / copper sulfate composite slurry on a substrate to a coating thickness of greater than or equal to 1 mm; sequentially feeding the substrate into a tunnel chamber and a tunnel furnace filled with hydrogen iodide vapor to obtain a fluffy graphene-composite nano-copper film; sequentially placing the fluffy graphene-composite nano-copper film in a carbonization furnace and a graphitization furnace to obtain a heat-treated fluffy graphene-composite nano-copper film; and placing the heat-treated fluffy graphene-composite nano-copper film in a vacuum high-temperature hot-pressing sintering furnace. By updating the formulation and process, nano-copper is introduced, thereby improving the tear strength of the graphene-composite copper conductive film while ensuring good electrical conductivity.

The invention relates to the technical field of electrodes, in particular to a preparation method of a dry-method electrode plate and a prepared battery. The composite conductive material is prepared by adding a composite carbon nanotube conductive material, a silver solution, hydrogen iodide, hexadecyl trimethyl ammonium bromide, an aniline monomer, ferric chloride and ammonium persulfate as raw materials. And adding polyvinylpyrrolidone, ethylene glycol, sodium chloride, silver nitrate and the nickel-cobalt-manganese active material to prepare the modified nickel-cobalt-manganese active material. And mixing the modified nickel-cobalt-manganese active material, the composite conductive material and a polytetrafluoroethylene binder, and carrying out low-temperature ball milling, high-temperature pre-fibration and rolling to obtain the self-supporting membrane. And rolling and compounding the self-supporting film and the current collector to obtain the electrode plate. The prepared dry-method electrode plate has good conductivity and cycle performance, so that the dry-method electrode plate has a wide application prospect in the technical field of electrodes.

Disclosed in the present invention are a system and method for obtaining hydrogen iodide by using sulfur dioxide in boiler flue gas. The system comprises a scrubbing tower, an absorption tower, an iodine interception tower, and a flue gas test and discharge device; an outlet of a flue duct downstream of a boiler booster fan is connected to a flue gas inlet of the scrubbing tower, a flue gas outlet of the scrubbing tower is connected to a flue gas inlet of the absorption tower, a flue gas outlet of the absorption tower is connected to a flue gas inlet of the iodine interception tower, and a flue gas outlet of the iodine interception tower is connected to an inlet of the flue gas test and discharge device. The method comprises: using the scrubbing tower to remove most of dust and nitrogen oxides in flue gas, so as to reduce the impact of these impurities on the absorption of sulfur dioxide by iodine; using the iodine interception tower to reduce the probability of iodine escaping from the system; and using the absorption tower to collect a slurry formed after iodine interception, thereby reducing the use of clean water and the generation of wastewater. In the present invention, flue gas is subjected to three-stage purification by means of the scrubbing tower, the absorption tower and the iodine interception tower, and thus is cleaner and more environmentally friendly.

The application discloses a kind of coupling membrane separation and pressure swing adsorption's sulfur-iodine cycle hydrogen purification method and device.The method comprises: the decomposition product gas from hydrogen iodide decomposition unit enters preliminary treatment unit and is condensed to remove water, to realize preliminary separation;After preliminary separation, mixed gas enters membrane separation equipment, and membrane separation equipment is based on molecular size rejection mechanism to realize the preliminary separation between hydrogen and other impurities, and hydrogen in mixed gas enters the permeation side through membrane material, to form the preliminary purification hydrogen-rich gas stream;Hydrogen-rich gas stream enters PSA purification device, and PSA purification device uses gradient adsorbent bed to purify hydrogen-rich gas stream, to obtain high-purity hydrogen.The application solves the problem of low purity and low yield in sulfur-iodine cycle hydrogen purification, and provides an efficient purification scheme for sulfur-iodine cycle and other thermochemical hydrogen production technologies.

The present disclosure relates to the technical field of hydrogen production, in particular to a sulfur-iodine cycle hydrogen production process and system based on ammonium iodide crystallization. The process includes S1, Bunsen reaction and two-phase separation; S2, sulfuric acid decomposition and gas circulation; S3, ammonium iodide crystallization and circulation; S4, ammonium iodide drying and decomposition; S5, gas circulation and hydrogen purification. The present disclosure adopts a process of circulating ammonia-ammonium iodide, successfully extracts anhydrous and iodine-free hydrogen iodide gas, and at the same time adopts a pressurization and cooling process to realize the condensation and reuse of excess ammonia, making the economy of the sulfur-iodine cycle hydrogen production reach the industrialization threshold.

A method for obtaining a salt with a general formula: RxNI, wherein: RxN is an organic cation (RxN+), R represents substituents (R—) independently selected from a group consisting of organic substituents: R1—, R2—, R3— and hydrogen (H—), x is a number of the substituents R— directly linked with the nitrogen (N) atom in the organic cation RxN+, wherein x is 3 or 4, I is an iodide anion (I−). The method comprises: preparing a reaction mixture comprising the steps of: synthesizing hydrogen iodide (HI) in situ by mixing molecular iodine (I2) with formic acid (COOH) in a molar ratio of molecular iodine (I2): formic acid (COOH) of no less than 1.01:1, in a solvent medium, introducing into the solvent medium a compound being a donor of organic cation RxN+ in an amount providing the molar ratio of the donor of organic cation RxN+: molecular iodine (I2) of no less than 1.01:1, and maintaining the reaction mixture at a temperature of not less than 20° C. for the time necessary to obtain the reaction product being the salt with the general formula RxNI. The obtained product is a substrate for synthesis of perovskites.

The utility model belongs to the technical field of lithium batteries, and particularly relates to a device for synthesizing anhydrous lithium iodide. Comprising a tubular reactor, a material processing tank and a vacuum dryer, one end of the tubular reactor is provided with a feed port, and the other end is provided with a discharge port; the material treatment tank is connected with the discharge port through a material flowing pipe, a filter membrane is detachably mounted in the material treatment tank, the top of the material treatment tank is connected with a feeder through a feeding pipe, and a first valve is arranged on the feeding pipe; and the vacuum dryer is connected to the bottom of the material treatment tank through a material outlet pipe. By adopting the tubular reactor, the reaction efficiency is effectively improved, and the tubular reactor has the characteristic of small backmixing, so that the volume efficiency (unit volume production capacity) is high, the reaction efficiency of lithium hydroxide and hydrogen iodide is accelerated, the problem of non-uniform concentration of a reaction system in the industrial production process of lithium iodide is avoided, and the product quality is improved. And meanwhile, the production efficiency of anhydrous lithium iodide is improved.

The invention provides a method for preparing rubidium halide / cesium halide based on lithium precipitation mother liquor, which comprises the following steps: adding a first extraction agent into the lithium precipitation mother liquor, and mixing and extracting to obtain a cesium-loaded organic phase and cesium extraction raffinate; mixing the cesium-loaded organic phase with a first detergent, and washing to obtain a washed cesium-loaded organic phase; the washing cesium-loaded organic matter and a first stripping agent are mixed for countercurrent stripping, cesium-rich stripping liquid is obtained, and the stripping agent is a hydrogen bromide or hydrogen iodide aqueous solution; the cesium-rich strip liquor is subjected to oil removal, evaporation and crystallization, and a cesium halide product is obtained; roasting the cesium halide product to obtain white cesium halide powder; performing counter-current extraction on the cesium extraction raffinate to obtain a rubidium-loaded organic phase; carrying out countercurrent washing on the rubidium-loaded organic phase and a second detergent to obtain a washed rubidium-loaded organic phase; the washing rubidium-loaded organic phase and a second stripping agent solution are subjected to countercurrent stripping, and rubidium-rich stripping liquid is obtained; and deoiling, evaporating, crystallizing and calcining the rubidium-rich strip liquor to obtain a rubidium halide product.

A method of removing water from a mixture of iodine (I2) and water includes providing a mixture comprising iodine and water and: contacting the mixture with an adsorbent to selectively adsorb water from the mixture, contacting the mixture with a concentrated acid to absorb water from the mixture, separating the water from mixture by distillation, contacting the mixture with a gas that is inert to iodine (I2), contacting the mixture with hydrogen iodide (HI), or combinations thereof.

The invention discloses a method for continuously preparing trifluoroiodomethane. The method specifically comprises the following steps: in a continuous reactor, in the presence of a fluorination catalyst and a dehydration catalyst, reacting carbonyl fluoride, hydrogen iodide and hydrogen fluoride at the reaction temperature of 100-400 DEG C to obtain trifluoroiodomethane. The preparation method has the advantages of few three wastes, environmental friendliness, suitability for industrial production and the like.

Method for introducing a photovoltaic absorber material into a photovoltaic module comprising a plurality of cells with a front and a rear substrate, wherein a) a photovoltaic absorber material in the solid state selected from the group consisting of semiconducting perovskites of the general form KM-A3 (K: cation, M: metal, A: anion), wherein K is selected from the group consisting of Cs + , CH3NH3 + , Li + , N / a + , K + , Rb + , Ag + , Cu + , Imidazolium cations, ammonium cations, pyridinium cations, formamidinium cations, guanidinium cations, thiourea cations, bipyridyls, Ca 2+ and Mg 2+ , M is selected from the group consisting of Pb, Sn, Bi, Fe, Mn, Cu, Co, W, Ti and Zn, and A is selected from the group consisting of I - , Cl - , F - , Br - , SCN- , BF4 - , OTf - , MnO4 - , O 2- , S 2- and SO4 2- by introducing a polar gas selected from the group consisting of primary, secondary and tertiary amines, amidines, pyridines, imidazoles, hydrogen iodine, hydrogen chloride or hydrogen bromide, ammonia and mixtures thereof, which is liquefied as a melt. b) the liquid photovoltaic absorber material is actively transported by means of pressure and / or temperature changes through an opening into a distribution channel connected to the individual cells and the individual cells, wherein reservoirs for receiving the photovoltaic absorber material are arranged at the end of each cell facing the distribution channel, c) further distribution of the photovoltaic absorber material in porous structures contained within the cells occurs passively via capillary forces from the respective reservoir and d) the polar gas causing the liquefaction is driven out of the photovoltaic absorber material.

A cleaning solution, a method for cleaning a substrate, and a method for manufacturing a semiconductor. The cleaning solution includes at least one of a compound a1 represented by a general formula (a1), a salt of the compound (a1), a hydrate of the compound (a1), hydrogen iodide, borane, and a complex of the borane; an amine compound that has 4 or more carbon atoms and is not the compound a1, or a salt thereof; and an anticorrosive agent,in which R1 and R2 each independently represents an organic group that does not contain a carbonyl group, or a hydrogen atom.

The application provides a graphene composite copper heat-conducting film and a preparation method thereof, and comprises the following steps: adding graphene oxide into water and stirring to obtain graphene oxide slurry; adding copper sulfate solution into the graphene oxide slurry to obtain graphene oxide / copper sulfate composite slurry; coating the graphene oxide / copper sulfate composite slurry on a substrate; sequentially feeding the substrate into a tunnel bin filled with hydrogen iodide vapor and a tunnel furnace to obtain a fluffy graphene composite nanometer copper film; first placing the fluffy graphene composite nanometer copper film in a carbonization furnace, and then placing the fluffy graphene composite nanometer copper film in a graphitization furnace to obtain a heat-treated fluffy graphene composite nanometer copper film; and placing the heat-treated fluffy graphene composite nanometer copper film in a vacuum high-temperature hot-pressing sintering furnace. Through the updating of the formula and the process, the copper is attached to the surface of the graphene and filled and covered in the gap between the graphene layers, so that the thermal conductivity of the graphene heat-conducting film in the thickness direction is improved.

The present invention describes a method for synthesising triiodide anions inside zeolites in a single reactor by means of a cascade reaction comprising dehydroiodination of alkyl iodides and oxidation in-situ with air, generating a solid material that can be used as a heterogeneous catalyst, an electrolyte for photovoltaic or perovskite cells and an agent for controlled release of triiodide for disinfection and hypothyroidism.

This invention discloses a coupled system and method for flue gas desulfurization and iodine-sulfur cycle hydrogen production based on ammonium sulfite cycling. The system consists of an ammonium sulfite cycling desulfurization unit and a semi-open-ring iodine-sulfur cycle hydrogen production unit. The ammonium sulfite cycle achieves efficient capture and enrichment of SO₂ from flue gas, with zero ammonia consumption and no escape. It constructs a closed-ring iodine and open-ring / semi-open-ring iodine-sulfur hydrogen production system, using flue gas SO₂ as the external sulfur source. The traditional 850℃ high-temperature decomposition step of iodine-sulfur with sulfuric acid is eliminated; hydrogen is produced only by decomposing hydrogen iodide at 300–450℃. Iodine is recycled in a closed-ring manner, with sulfuric acid as a byproduct. This invention simultaneously achieves deep flue gas desulfurization, sulfur resource utilization, and low-cost hydrogen production, significantly reducing energy consumption and operating costs. It possesses excellent environmental and economic benefits and is applicable to sulfur-containing flue gas treatment and hydrogen co-production scenarios in thermal power, steel, coking, and chemical industries.