18 results about "Hydrogen iodide" patented technology

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 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 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.

The invention discloses a developing plasticizer, a preparation method and a liquid embolism agent, and relates to the field of medical materials. According to the invention, citric acid, an epoxy compound and hydrogen iodide are taken as raw materials to synthesize the citric acid iodo-ester compound connected with the iodine atoms through covalent bonds, so that the iodine atoms are uniformly arranged on the molecules of the citric acid iodo-ester compound, and the dispersity of the iodine atoms when the iodine atoms are applied to the liquid embolism agent is improved. By adding the citric acid iodo-ester compound, the problems that in the prior art, after an additional developing agent needs to be added, the mixing compatibility of the developing agent and cyanoacrylate is poor, and the mechanical property of the cured cyanoacrylate is reduced are solved. When the developing plasticizer is applied to a liquid embolism agent, the liquid embolism agent has developing performance, and the embolism agent can be directly observed in the embolism process.

This invention belongs to the field of sulfur-containing silane production technology, and particularly relates to a clean production process for sulfur-containing silanes, comprising the following steps: Step S1, synthesizing mercaptopropyltriethoxysilane; S2, reacting the obtained mercaptopropyltriethoxysilane liquid with iodine solution and iodine in carbon tetrachloride solution in a reaction tower, with the generated hydrogen iodide discharged from the top of the reaction tower; Step S3, after the reaction, the mixture of liquid product and unreacted mercaptopropyltriethoxysilane is pumped from the bottom of the reaction tower into a vacuum distillation tower for separation to obtain qualified Si-75 product, and the unreacted mercaptopropyltriethoxysilane is recovered and returned to the reaction tower. This achieves recycling to reduce raw material costs, minimizes the types of materials used in the process, avoids the difficulties of using and handling solid materials, and thus enables high-capacity, low-cost, clean production of the sulfur-containing silane sulfurizing agent Si-75.

The present application relates to the technical field of alloy coating, and particularly relates to a Co composite modified PtAl diffusion layer suitable for nickel-based high-temperature alloy and a preparation method thereof. The preparation method provided by the present application comprises the following steps: after plating platinum on the surface of the nickel-based high-temperature alloy, vacuum heat treatment is performed to obtain the nickel-based high-temperature alloy with a surface comprising a Ni-Pt interdiffusion layer; a cobalt-aluminum co-diffusion treatment is performed on the nickel-based high-temperature alloy with the surface comprising the Ni-Pt interdiffusion layer by using a chemical vapor deposition method to obtain the Co composite modified PtAl diffusion layer; the cobalt source used in the chemical vapor deposition is a mixture of ammonium iodide and cobalt particles, and the reaction gas of the cobalt source is hydrogen iodide; the aluminum source used in the chemical vapor deposition is aluminum particles, and the reaction gas of the aluminum source is hydrogen chloride. The preparation method solves the problem of low cobalt diffusion efficiency caused by excessively high aluminum diffusion temperature by adjusting the composition of the cobalt source.

This invention discloses a method for producing trifluoroiodomethane (CF3I), the method comprising: providing a feedstock containing trifluoroacetyl iodide (TFAI); passing the feedstock through at least one tower loaded with carbon-containing material to remove hydrogen iodide (HI), hydrogen triiodide (HI3), and iodine (I2) from the feedstock; and providing the feedstock to a reactor to produce a trifluoroiodomethane product stream. Another method for producing trifluoroiodomethane (CF3I) comprises: providing a feedstock containing trifluoroacetyl iodide (TFAI) to a reactor to produce a trifluoroiodomethane product stream; and passing the trifluoroiodomethane product stream from the reactor through at least one tower loaded with carbon-containing material to remove hydrogen iodide (HI), hydrogen triiodide (HI3), and iodine (I2) from the trifluoroiodomethane product stream.

The invention discloses a hydrogen production method and device based on flue gas coupling sulfur-iodine circulation, and belongs to the technical field of hydrogen energy preparation, the device comprises an absorption tower, a primary rectifying tower, a primary filter, a secondary rectifying tower, a secondary filter, a sulfuric acid treatment device, a collecting tank, a membrane separation device, a hydrogen iodide decomposition device and a condensing device; an outlet flue of a boiler induced draft fan enters an absorption tower and reacts with a circulating iodine solution to generate a HI-H2SO4 mixed solution; dehydrating the mixed solution through a first-stage rectifying tower, removing iodine through a first-stage filter, separating HI and sulfuric acid through a second-stage rectifying tower, and storing the treated sulfuric acid in a tank; the HI steam is purified by the membrane separation device and then enters the hydrogen iodide decomposition device for hydrogen production, and the generated hydrogen is stored in the device; undecomposed HI and iodine steam are cooled by the heat exchanger, liquefied by the condensing device, converged with recycled iodine and water in the collecting tank, and returned to the absorption tower through the liquid mixing pump to complete circulation. The technical problems of sulfur-iodine cycle hydrogen production and flue gas desulfurization are solved through process reconstruction and technology integration.

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.

A method of producing trifluoroiodomethane (CF3I) includes providing a feedstock comprising trifluoroacetyl iodide (TFAI), passing the feedstock through at least one column loaded with a carbon-containing material to remove hydrogen iodide (HI), hydrogen triiodide (HI3), and iodine (I2) from the feedstock, and providing the feedstock to a reactor to produce a trifluoroiodomethane product stream. Another method of producing trifluoroiodomethane (CF3I) includes providing a feedstock comprising trifluoroacetyl iodide (TFAI) to a reactor to produce a trifluoroiodomethane product stream, and passing the trifluoroiodomethane product stream from the reactor through at least one column loaded with a carbon-containing material to remove hydrogen iodide (HI), hydrogen triiodide (HI3), and iodine (I2) from the trifluoroiodomethane product stream.

The present disclosure provides a process for making trifluoroacetyl iodide (TFAI) in a liquid phase reaction. Specifically, the present disclosure provides a liquid phase reaction of trifluoroacetyl chloride (TFAC) and hydrogen iodide (HI) to form trifluoroacetyl iodide (TFAI), with or without a catalyst. The reaction can be carried out at ambient or elevated temperatures.

The present invention relates to a process for preparation of a fluoride-free, surface functionalized MXene, the process comprising etching MAX phase with sulfuric acid to obtain a partially oxidized MAX phase, treating the partially oxidized MAX phase with hydrogen iodide (HI) to obtain a charge transfer complex, etching the charge transfer complex with vinegar to obtain the fluoride-free, surface functionalized MXene and optionally treating the fluoride-free, surface-functionalized MXene with oxygen to obtain an oxygenated MXene. The process invention also relates to a fluoride-free, surface functionalized MXene as electrode and a process for preparation of the same. The present invention further relates to a full cell for electrochemical device comprising the fluoride-free, surface functionalized MXene electrode.

The present invention relates to a method for purifying ultra-high-purity hydrogen iodide. The present invention has the effect of providing a method for purifying ultra-high-purity hydrogen iodide having a purity of 99.999 to 99.999999999%, whereby only water of 10 ppm or less contained in high-purity hydrogen iodide can be removed to 0.1 ppm or less without decomposing or adsorbing the high-purity hydrogen iodide.

The invention belongs to the technical field of iodo-perfluoroalkane synthesis, and particularly discloses a method for preparing 1, 4-diiodo-perfluorobutane through catalytic coupling of a two-channel reactor. According to the method, the reaction state of a reactor containing a Ga-In2O3 / ZrO2 catalyst is adjusted through a four-way valve, and in the first reaction state, IPF-2 is subjected to a catalytic coupling reaction in a reactor I through a four-way valve I to obtain IPF-4, and the IPF-4 is discharged from an outlet I of a four-way valve II; meanwhile, hydrogen is subjected to a deiodination regeneration reaction in a reactor II through a four-way valve I to obtain hydrogen iodide, and the hydrogen iodide is discharged from an outlet II of a four-way valve II; the second reaction state is a state of changing the four-way valve I, so that the reactor I performs a deiodination regeneration reaction, the reactor II performs a catalytic coupling reaction, and a material outlet is kept unchanged through the four-way valve II; and circulating switching is carried out, so that IPF-4 preparation is realized. The method provided by the invention has the advantages of high selectivity, high yield and small equipment operation pressure.

This invention belongs to the field of renewable energy power testing technology, and discloses a device and method for testing the decomposition kinetics of hydrogen iodide. A certain mass of catalyst sample is weighed using an electronic balance and filled into the middle of a reaction tube, which is then fixed with high-purity silica wool on both sides. A bidirectional injection pump is used to introduce HI solution into an HI evaporator; the vaporized HI gas is then purged with N2 and enters the reaction tube. After catalytic reaction in a fixed-bed reactor, the reaction mixture is first condensed in a condenser and then separated in a gas-liquid separator. Acidic gas impurities and water are removed using NaOH solution and silica gel. Finally, only a mixture of N2 and H2 is allowed to enter a hydrogen analyzer, where a thermal conductivity hydrogen analyzer is used to measure the H2 concentration at the outlet. This invention determines the corresponding kinetic parameters and simultaneously applies the catalyst to the reactor design process, analyzing the impact of different types of catalysts on reactor performance.

To provide a process for producing hydrogen iodide.SOLUTION: The process includes providing a vapor-phase reactant stream comprising hydrogen and iodine and reacting the reactant stream in the presence of a catalyst to produce a product stream comprising hydrogen iodide. The catalyst includes at least one selected from the group of nickel, cobalt, iron, nickel oxide, cobalt oxide, and iron oxide. The catalyst is supported on a support.SELECTED DRAWING: Figure 1