45results about "Fluoride preparation" patented technology

Provided is a fluorine gas production method, which makes it possible to re-use a byproduct hydrogen fluoride, which is a byproduct produced during the production of a fluoride, i.e., a desired component, by reacting a raw material compound with a fluorine gas to fluorinate the raw material compound, as a raw material for the production of a fluorine gas by an electrolysis method. The fluorine gas production method comprises: a fluorination step of producing a reaction mixture comprising a main product fluoride, which is a desired component produced by fluorinating a raw material compound, and a byproduct hydrogen fluoride, which is produced as a byproduct; a separation step of separating the reaction mixture to produce a main product component containing the main product fluoride and a byproduct component containing the byproduct hydrogen fluoride; a purification step of purifying the byproduct component to produce such a recycled hydrogen fluoride component that the concentration of an organic substance contained in the byproduct component is decreased and the concentration of the byproduct hydrogen fluoride is increased; an electrolysis step of carrying out an electrolysis procedure using the recycled hydrogen fluoride component as at least a portion of an electrolyte solution to produce a fluorine gas; and an introduction step of introducing the fluorine gas produced in the electrolysis step into a reaction field for fluorination in the fluorination step.

An apparatus for treating a fluid including an organofluorine compound, the apparatus including: a vessel that contains a liquid with a fluoride bonding agent; a combustion chamber in fluid communication with the vessel via an outlet submerged in the liquid; an inlet configured to introduce the fluid into the combustion chamber; and a flame source configured to produce a flame in the combustion chamber to at least partially break down the organofluorine compound to form a gaseous combustion product bearing fluoride, wherein the gaseous combustion product passes from the outlet of the combustion chamber through the liquid so that the fluoride in the gaseous combustion product is at least partially bound by the fluoride bonding agent.

This invention discloses a method for the green co-processing of lithium slag and carbonaceous solid waste, relating to the field of slag treatment technology. The method includes: ball milling and mixing lithium slag, carbonaceous solid waste, and magnesium powder to obtain a reaction precursor; heating the reaction precursor under a protective atmosphere and negative pressure to produce solid products and flue gas containing beryllium, thallium, and fluorine; first, absorbing the flue gas containing beryllium, thallium, and fluorine with acid to obtain a beryllium-thallium acid washing solution; then absorbing the remaining fluorine-containing acidic tail gas with alkali to obtain a fluoride salt solution; mixing the solid product with the alkali solution, stirring, heating, washing to neutrality, and drying to obtain a porous material. This method practices the concept of "treating waste with waste," simultaneously solving the problems of gypsum decomposition, detoxification and fixation of toxic components, tail gas purification, and resource utilization through co-processing, achieving deep harmlessness of lithium slag, and significantly improving resource utilization and economic benefits.

The present disclosure relates to compositions comprising 1,1,1,4,4,4-hexafluoro-2-butyne that may be useful as reaction intermediates, cleaning agents, and etching gases.

The method for purifying nitrogen trifluoride and synthesizing the modified adsorbent used therefor employs the following steps: Step S1, which involves removing impurities F2, HF, N2, O2, CO, CO2, N2F2, N2F4, and N2O from nitrogen trifluoride using a cold trap method to obtain a mixed gas of NF3 and CF4 with a content of 260 ppm; Step S2, which involves reducing the concentration of CF4 in Step S1 to 3-8 ppm or less using a high-pressure boiling method; and Step S3, which involves selectively adsorbing and desorbing NF3 using a modified adsorbent to obtain a high-purity NF3 gas with a CF4 content of less than 2 ppm. In the nitrogen trifluoride purification process according to the present invention, by performing a two-step CF4 removal process in which impurity gases F2, HF, N2, O2, CO, CO2, N2F2, N2F4, and N2O are removed by a cold trap method, and then CF4 impurity gas is removed by a high-pressure boiling method and a modified adsorbent, it becomes possible to reduce the CF4 content in the obtained high-purity NF3 gas to less than 2 ppm.

Dissolved [ 18 A method for preparing a composition suitable for radiofluorination comprising: - water and [F] fluoride ion. 18 providing an aqueous solution containing [F] fluoride ions; and passing the aqueous solution through a solid phase extraction device containing an anion exchange resin to deposit [F] fluoride ions on the anion exchange resin. 18 [F] fluoride ions captured on the anion exchange resin 18 [F] fluoride ions from the water; and [F] fluoride ions from the anion exchange resin by passing an elution composition comprising an organic solvent and a salt of an alkanoic acid through a solid phase extraction device. 18 and eluting the [F] fluoride ions dissolved in an organic solvent and a salt of an alkanoic acid. 18 and obtaining as an eluate a composition comprising dissolved [F] fluoride ions. 18 A composition comprising [F] fluoride ions, and a dissolved [ 18 A method for preparing a radiofluorinated organic compound is provided that involves preparing a composition containing [F] fluoride ion.

The invention relates to the field of fluorine-containing organic matter treatment, in particular to a fluorine-containing organic matter treatment method, a fluorine-containing organic matter-containing hydrogen chloride purification method, a chlorine preparation method and a metal fluoride preparation method. The treatment method of the fluorine-containing organic matter comprises the steps that in the presence of hydrogen chloride, the fluorine-containing organic matter makes contact with a metal compound, metal fluoride is generated, and L acid exists in the metal compound under the action of hydrogen chloride. Therefore, the fluorine-containing organic matters in the hydrogen chloride can be effectively removed, so that the hydrogen chloride is purified and is further used for preparing chlorine, and meanwhile, the fluorine-containing organic matters in the hydrogen chloride can also be converted into metal fluorides with high additional value, such as aluminum fluoride.

A process for preparing a fluorinating reagent from a calcium-containing compound is disclosed. The process bypasses the requirement to form hydrofluoric acid. The fluorinating reagent can be used to prepare high-value fluorochemicals.

The invention discloses an energy storage FFC production method, and relates to the technical field of energy storage material production, and the method comprises the following steps: S1, raw material pretreatment; s2, preparing an electrolysis system; s3, an FFC electrolysis process is carried out; step S4, post-treatment of a product; step S5, recovering by-products; by adding the pore-forming agent and optimizing the sintering process, the requirements on the particle size and uniformity of the raw materials are reduced, industrial-grade metal oxides with the purity being greater than or equal to 98% can be adopted as the raw materials, and the cost of the raw materials is reduced by more than 30%; the porous green body structure improves the electrolyte wettability and ion transmission efficiency, the electrolytic reaction rate is improved by 20-40%, the optimized villiaumite system and electrolytic parameters inhibit product oxidation and grain coarseness, the purity of the prepared energy storage electrode material is greater than or equal to 99.5%, the grain size is controlled to be 50-200nm, and when the energy storage electrode material is used for a lithium ion battery, the first charge-discharge efficiency is greater than or equal to 90%. And the capacity retention ratio after 500 cycles is greater than or equal to 85%.

The invention discloses a method for removing hydrogen fluoride in metal fluoride electron gas by purifying modified activated carbon, which comprises the following steps: acidifying the activated carbon to remove oxides in the activated carbon; the acidified activated carbon is washed with water and then dried at a high temperature, finally, fluoride is loaded on the dried activated carbon, modified activated carbon is obtained, and hydrogen fluoride in the metal fluoride electronic gas is removed through the modified activated carbon. The method is easy to operate, compared with a traditional method for removing hydrogen fluoride, the efficiency is greatly improved, the technological process is simple, the raw material yield is high, and wide application prospects are achieved.

The present disclosure pertains to a method for producing a fluoride, comprising a step for firing a mixture containing a titanium oxide, an aluminum oxide, a starting material fluoride having a composition different from that of the fluoride to be produced, and a lithium-containing compound in an inert gas atmosphere. The titanium oxide contains TiO2. The aluminum oxide contains Al2O3. The raw material fluoride contains NH4F. The lithium-containing compound contains at least one compound selected from the group consisting of lithium fluoride, lithium carbonate, and lithium nitrate.

The invention discloses a halide nano-material, a preparation method and an application in a solid-state battery, and the preparation method comprises the following steps: carrying out wet ball-milling synthesis on a halide raw material, drying, carrying out three-stage gradient heating control in an inert atmosphere, cooling, crushing and screening to obtain the size-controllable halide nano-material, the specific three-stage gradient heating control is as follows: the first heating stage is a low-temperature desorption stage, and the temperature is increased from room temperature to 120-170 DEG C; the second heating stage is a medium-temperature crystallization stage, and the temperature is increased from 120-170 DEG C to 200-220 DEG C; and the third heating stage is a high-temperature densification stage, and the temperature is increased from 200-220 DEG C to 250-300 DEG C. According to the invention, the particle size change is substantially controllable, finally the beneficial effects that the particle size D50 is less than or equal to 0.9 mu m and the deviation is less than or equal to 5% are realized, the problem of high particle size dispersity of the existing synthesis method is overcome, the morphology and dispersity of the nano material are improved, the particle bulk density is increased, the interface contact resistance is reduced, and the preparation method is simple and convenient. The problem that the macroscopic particle interface compatibility is poor is solved.

The invention relates to a fluoride-coated precursor, a preparation method thereof and a single-crystal positive electrode material. The preparation method comprises the following steps: carrying out parallel flow mixing on a first metal salt solution, a complexing agent solution and a precipitant solution, and carrying out first coprecipitation reaction to a target particle size; and then stopping introducing the first metal salt solution, introducing the fluorine source solution and the second metal salt solution at the same time, and carrying out a second coprecipitation reaction to obtain the fluoride-coated precursor. The cladding fluoride grows on the surface of the precursor and can be used as a fluxing agent during preparation of a single-crystal positive electrode material, so that the single-crystal material can be prepared at a relatively low temperature; meanwhile, fluoride can serve as a doping agent, and through composite doping of second metal and fluorine, the structural stability and the cycle performance of the single-crystal positive electrode material are improved; and an additional impurity removal process is not needed.

A method for removing fluorine gas from a fluorine-containing gas containing fluorine gas and a fluorine-containing compound gas is provided. A method for removing fluorine gas from a fluorine-containing gas containing fluorine gas and a fluorine-containing compound gas includes a removal step in which the fluorine-containing gas is brought into contact with at least one metal salt selected from the group consisting of metal chlorides, metal bromides, and metal iodides.

A process includes providing a reactor containing a compound of the formula SiOx, wherein 0 ≤ x ≤ 2, and receiving, at the reactor, fluorinated gas. The process also includes obtaining a gaseous mixture formed at an elevated temperature in the reactor and removing silicon tetrafluoride from the gaseous mixture. An apparatus includes a reactor containing a compound of the formula SiOx, wherein 0 ≤ x ≤ 2, a component for receiving fluorinated gas at the reactor, a heating element for heating the compound of the formula SiOx and the fluorinated gas in the reactor, and a separation component for removing silicon tetrafluoride from a gaseous mixture formed in the reactor. A process of semiconductor manufacturing includes defluorinating exhaust gas using the process. A system for semiconductor manufacturing includes a set of components for carrying out the process.

The invention relates to the technical field of batteries, in particular to a high-entropy fluoride positive electrode material, a preparation method of the high-entropy fluoride positive electrode material, a positive electrode plate and a lithium battery. The high-entropy fluoride positive electrode material provided by the invention comprises a high-entropy fluoride main body material and a LiF coating layer located on the surface of the high-entropy fluoride main body material, the high-entropy fluoride main body material comprises at least five metal elements, and the mass ratio of the high-entropy fluoride main body material to the LiF coating layer is (90-97): (3-10). According to the high-entropy fluoride positive electrode material disclosed by the invention, the interface stability and the lithium ion conductivity are greatly improved through the synergistic effect of the high-entropy fluoride main body material and the LiF coating layer, and the high-entropy fluoride positive electrode material has a wider application scene.

Provided herein are compositions and methods of manufacturing compositions useful in producing battery electrolyte precursors and battery electrolytes.

The invention provides a defluorination method of perfluorinated and polyfluorinated alkyl substances (PFAS), and belongs to the technical field of defluorination of fluorine-containing polymers. The method for defluorinating the perfluoro and polyfluoroalkyl substances comprises the following steps: catalyzing the perfluoro and polyfluoroalkyl substances to perform defluorination reaction in a solvent by using a cocatalyst, a reducing agent and a photocatalyst under an illumination condition, and breaking carbon-fluorine bonds and part of carbon-carbon bonds in the perfluoro and polyfluoroalkyl substances to obtain inorganic villiaumite and a carbon product; wherein the reaction temperature of the defluorination reaction is 0-250 DEG C, and the cocatalyst comprises a basic catalyst. The method disclosed by the invention can be realized at a relatively low temperature, electrons on the surface of the photocatalyst are excited into substances with strong reducibility through optical excitation, perfluoro and polyfluoroalkyl substances are reduced, and all carbon-fluorine bonds of the perfluoro and polyfluoroalkyl substances are broken. The method is low in reaction temperature, mild in condition and high in defluorination rate, and has a remarkable industrial prospect.

This apparatus for producing complex fluoride particles comprises: a mixer for mixing a first solution in which a first compound that is an alkali metal fluoride is dissolved, a second solution in which a second compound having a metal element different from the alkali metal element contained in the alkali metal fluoride is dissolved, and a third solution in which a third compound that reacts with hydroxide ions to produce water is dissolved, thereby producing a mixed solution containing the complex fluoride particles; a pH detection unit for measuring the pH value of the mixed solution, which changes as water is produced; and an estimation unit for estimating the particle size of the complex fluoride particles according to the pH value.

Gas-phase catalytic fluorination with chromium-based catalysts. The present invention relates to a process for fluorinating a chlorinated compound comprising the steps of (a) contacting said chlorinated compound with hydrogen fluoride in the gas phase in a reactor in the presence of a fluorination catalyst to produce a fluorinated compound, and (b) regeneration of the fluorination catalyst used in step a), the regeneration step of the fluorination catalyst comprising (c) treating said fluorination catalyst with an oxidant to form an oxidized fluorination catalyst, and (d) treating the oxidized fluorination catalyst obtained in step (c) with a gaseous mixture comprising a reducing agent.

The disclosure relates to a method of recycling a battery comprising flour-containing electrolyte salts. These salts may therefore undergo thermal hydrolysis to form HF, which is problematic as heating is needed for efficient removal of liquids. This disclosure aims to solve the problem by adding a treatment step prior to drying that serves to convert the fluorine-containing electrolyte salts into derivatives, which are not prone to thermal degradation. The present disclosure therefore offers a safe approach to recycle batteries comprising flour-containing electrolyte salts.

This invention provides a method for producing carbon tetrafluoride using fluoroform as a raw material, and a pyrolysis and purification apparatus, which relate to the technical field of fluoroform resource utilization. Fluoroform is injected into a thermal plasma reactor and subjected to a pyrolysis reaction at 1500-5000 K to obtain carbon tetrafluoride. Compared to conventional tubular furnace pyrolysis or high-temperature muffle furnace pyrolysis, the thermal plasma reactor used in this invention relies on the synergistic effect of highly active electrons and heavy particles at high temperatures, resulting in significant electron excitation. This allows for efficient cleavage and directional reorganization of chemical bonds in fluoroform molecules without the use of catalysts or fluorine gas, resulting in high fluoroform conversion, high carbon tetrafluoride selectivity, and low energy consumption. Furthermore, the method provided by this invention has a short reaction time, large throughput, is safe and controllable, and the pyrolysis reaction products have a simple composition and are easy to separate and purify. It also consumes low cost and energy, making it suitable for industrial continuous scale-up production.

This invention provides a manufacturing method that enables the industrial mass production of metal fluorides through mechanochemical processing. [Solution] A method for producing a metal fluoride, comprising the step of mechanochemically treating 10 g or more of a fluorine-containing compound with at least one metal oxide selected from the group consisting of alkali metal oxides and alkaline earth metal oxides to obtain a metal fluoride.

The invention discloses a method and system for extracting lithium by roasting and leaching lepidolite, and the method comprises the following steps: levigating lepidolite mineral powder by a ball mill, and granulating to form spherical lepidolite particles; the spherical lepidolite particles are preheated by hot air; the preheated flue gas is fed into a tail gas treatment process; the preheated spherical lepidolite particles are fed into a defluorination roasting furnace to be subjected to roasting reaction with the preheated vapor-containing gas; hF-containing roasting flue gas generated in the reaction is discharged from an outlet in the top of the defluorination roasting furnace, HF in the roasting flue gas reacts with a fluorine fixing agent to generate fluoride, the fluoride is discharged, and the defluorinated roasting flue gas is used as a heat source for preheating air; the defluorination roasting clinker enters an acidification roasting furnace to be subjected to a selective sulfation reaction with H2SO4 steam; and carrying out water leaching, filtration, concentration evaporation and neutralization lithium precipitation on the acidified and roasted clinker to obtain lithium carbonate. According to the method, the leaching rate gt of lithium, rubidium and cesium can be achieved; the resource utilization rate of fluorine and thallium is gt; the slag is reduced by 90% and gt; and 35%.

The present disclosure relates to compositions comprising 1, 1, 1, 4, 4, 4-hexafluoro-2-butyne, which can be used as reaction intermediates, cleaning agents, and etching gases.

The present disclosure pertains to a method for producing a fluoride, the method including a step in which a mixture containing a first ammonium salt containing Ti and F, a second ammonium salt containing Al and F and having a composition different from that of the first ammonium salt, and a lithium-containing compound is fired in an inert gas atmosphere. The first ammonium salt is represented by (NH4) aTiFa + 4, and a satisfies 0 < a < = 2. The second ammonium salt is represented by (NH4) bAlFb + 3, and b satisfies 0 < b < = 3. The lithium-containing compound contains at least one compound selected from the group consisting of lithium fluoride, lithium carbonate, and lithium nitrate.

The invention relates to a dynamic membrane filtration system for fluorine-containing wastewater treatment and resource recovery and an operation method. The dynamic membrane filtration system comprises a dynamic membrane filter, a clear water tank, a raw water tank, a pre-coating solution tank and a gas supply module. The pre-coating solution forms a dynamic membrane on the outer surface of the filter cloth after being input into the raw water chamber, fluoride in the fluorine-containing wastewater is intercepted by the dynamic membrane, and purified water enters the purified water temporary storage chamber through the dynamic membrane and then is output to the purified water tank. The defluorination filtration cycle of the dynamic membrane filtration system consists of four stages, namely a pre-coating stage, a defluorination stage and a drainage drying stage. Compared with the prior art, the fluorine-containing wastewater treatment effect and the fluoride recovery efficiency can be effectively improved, and the investment and the cost of a fluorine-containing wastewater treatment system are reduced.

The invention discloses an environment-friendly hydrofluoric acid waste liquid conversion and recovery treatment system, and relates to the technical field of resource recovery. The method comprises the following steps: deploying a sampling sensor array in a hydrofluoric acid waste liquid storage pool, acquiring particle and fluorine ion concentration data by an acquisition module according to a preset frequency, and constructing a time sequence data matrix; the distribution field construction module generates a concentration distribution field by using a UK-EVF spatial interpolation algorithm, and extracts characteristic parameters such as average concentration, concentration gradient and variable coefficient; the type determination module inputs the time sequence data matrix and the characteristic parameters into a classification identification model, and accurately judges the type of the waste liquid; and the recovery processing module automatically calls a corresponding environment-friendly recovery scheme accordingly. The defect that the concentration distribution in the pool cannot be comprehensively mastered through traditional single-point detection is overcome, precise classification and targeted recovery are achieved, and the treatment efficiency and the resource recovery rate of the hydrofluoric acid waste liquid are improved.

A process includes providing a reactor containing a compound of the formula SiOx, wherein 0≤x≤2, and receiving, at the reactor, fluorinated gas. The process also includes obtaining a gaseous mixture formed at an elevated temperature in the reactor and removing silicon tetrafluoride from the gaseous mixture. An apparatus includes a reactor containing a compound of the formula SiOx, wherein 0≤x≤2, a component for receiving fluorinated gas at the reactor, a heating element for heating the compound of the formula SiOx and the fluorinated gas in the reactor, and a separation component for removing silicon tetrafluoride from a gaseous mixture formed in the reactor. A process of semiconductor manufacturing includes defluorinating exhaust gas using the process. A system for semiconductor manufacturing includes a set of components for carrying out the process.