26results 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.

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 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 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.

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 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.

The invention discloses a method for green co-treatment of lithium slag and carbon-containing solid waste, and relates to the technical field of slag treatment. The method comprises the following steps: ball-milling and mixing lithium slag, carbon-containing solid waste and magnesium powder to obtain a reaction precursor; carrying out heating reaction on the reaction precursor under the conditions of protective atmosphere and negative pressure to generate a solid product and flue gas containing beryllium, thallium and fluorine; the method comprises the following steps: absorbing beryllium, thallium and fluorine-containing flue gas by pickling to obtain a beryllium and thallium-containing pickling solution; then absorbing the residual fluorine-containing acidic tail gas by using alkali wash to obtain a villiaumite solution; mixing the solid product with alkali liquor, stirring, heating, washing to be neutral, and drying to obtain the porous material. According to the method, the concept of treating waste with waste is practiced, the problems of gypsum decomposition, toxic component detoxification and fixation, tail gas purification and resource utilization are synchronously solved through cooperative treatment, deep harmlessness of the lithium slag is achieved, and the resource utilization rate and economic benefits are more remarkably improved.

Provided herein are compositions and methods of making compositions useful in the production of battery electrolyte precursors and battery electrolytes.

The invention provides a method for preparing anhydrous calcium sulfate from ardealite and synchronously removing phosphorus and fluorine, which comprises the following steps: mixing ardealite and a sulfuric acid solution for leaching reaction, filtering to respectively obtain filter residue and filtrate, and drying the filter residue to obtain anhydrous calcium sulfate; adding ardealite into the filtrate for leaching reaction, and filtering to obtain anhydrous calcium sulfate and filtrate b; repeatedly circulating the filtrate b for multiple times to perform operations of phosphogypsum addition and leaching reaction, collecting to obtain enriched filtrate, adding rare earth oxide and hydrogen peroxide, stirring to perform impurity removal reaction, and performing solid-liquid separation to respectively obtain precipitate rare earth phosphate and purified filtrate; carrying out recovery treatment on the precipitate rare earth phosphate; adding the purified filtrate into the filtrate, and carrying out circular reaction; volatilized fluorine-containing steam is collected in the stirring process, condensed and collected. The method provided by the invention can realize synergistic removal of phosphorus and fluorine in phosphogypsum.

A method for producing a fluoride of the present disclosure includes firing a mixture, which includes a first ammonium salt containing Ti and F, a second ammonium salt containing Al and F, and having composition different from that of the first ammonium salt, and a lithium-containing compound, 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 includes at least one selected from the group consisting of lithium fluoride, lithium carbonate, and lithium nitrate.

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

The present invention relates to the field of fluorine-containing organic matter treatment, and specifically relates to a method for treating a fluorine-containing organic matter, a method for purifying hydrogen chloride gas, a method for preparing a metal fluoride, and a method for preparing chlorine gas from hydrogen chloride gas. The method for treating a fluorine-containing organic matter comprises: in the presence of hydrogen chloride, bringing a fluorine-containing organic matter into contact with a metal compound to generate a metal fluoride, wherein an L acid is present in the metal compound under the action of hydrogen chloride. Therefore, the method can not only effectively remove a fluorine-containing organic matter, such that hydrogen chloride gas is purified, but can also be used for the preparation of chlorine gas; in addition, the fluorine-containing organic matter can be further converted into a metal fluoride having a high added value, such as aluminum fluoride.