42 results about "Fluorosulfonic acid" patented technology

The invention belongs to the field of inorganic chemical industry, and particularly relates to a method and a system for efficiently utilizing a phosphate fertilizer byproduct, the method comprises the following steps: carrying out acidolysis on fluosilicic acid with the concentration of more than or equal to 45% wt and concentrated sulfuric acid to generate a mixed solution of silicon tetrafluoride gas and fluorosulfonic acid; the mass ratio of the fluosilicic acid to the concentrated sulfuric acid is controlled to be 1: (4-15); pyrolyzing the obtained fluorosulfonic acid to generate dilute sulphuric acid, hydrogen fluoride and water vapor, forming 98% concentrated sulphuric acid from part of dilute sulphuric acid and fuming sulphuric acid, drying hydrogen fluoride to obtain crude hydrogen fluoride gas, and condensing and rectifying to obtain anhydrous hydrogen fluoride; the rest dilute sulphuric acid is partially compounded and then returned for acidolysis, and the rest dilute sulphuric acid is used for producing white carbon black and flows back to a wet-process phosphoric acid system; and circularly absorbing the obtained silicon tetrafluoride gas by using secondary concentrated fluosilicic acid to obtain fluosilicic acid with the mass concentration of more than or equal to 45%, recycling the fluosilicic acid for acidolysis reaction, and modifying the concentrated by-product silicon dioxide to obtain the high-activity white carbon black. The problems of energy consumption and cost are solved, and efficient circulation and poly-generation of fluorine and silicon resources are achieved in the whole process.

The application discloses a doped sodium iron fluorosulfate compound, a positive electrode material and a preparation method thereof and a sodium ion battery. y M z (SO4)2F, wherein y+z=1, 0 The doped sodium iron fluorosulfate compound of the application not only reduces the gas production, but also has relatively high gram capacity performance and cycle performance.

This invention discloses a method for treating ammonium fluorosulfate byproducts, comprising providing an ammonium fluorosulfate byproduct mainly comprising ammonium fluorosulfate and a small amount of fluorosulfonic acid and bis(fluorosulfonyl)imide; mixing the ammonium fluorosulfate byproducts with water; reacting the mixture of ammonium fluorosulfate byproducts and water at a hydrolysis reaction temperature to hydrolyze the ammonium fluorosulfate, fluorosulfonic acid and bis(fluorosulfonyl)imide to form an aqueous solution of ammonium bisulfate and hydrogen fluoride; and separating the ammonium bisulfate from the aqueous solution of hydrogen fluoride.

The invention discloses a supported catalyst and application thereof in synthesis of difluoroacetyl fluoride, the supported catalyst comprises a carrier and active components, the active components comprise superacid and an active auxiliary agent; in the supported catalyst, the loading capacity of the superacid is 20 wt%-25 wt%, and the loading capacity of the active auxiliary agent is 5 wt%-10 wt%; the superacid is selected from at least one of fluoboric acid, fluorosulfonic acid, fluoroantimonic acid and carborane acid; the active auxiliary agent is selected from at least one of molybdenum nitrate, technetium nitrate, ruthenium nitrate, rhodium nitrate and chromic nitrate; when the supported catalyst is used for synthesizing difluoroacetyl fluoride, 1, 1, 2, 2-tetrafluoroethyl ethyl ether is used as a raw material, hydrogen fluoride is added under the action of the supported catalyst to inhibit generation of ethylene, and difluoroacetyl fluoride and fluoroethane are generated through cracking under relatively mild conditions; compared with an existing preparation method, the conditions are milder, and the one-way yield is larger than 95%.

The present application relates to a kind of methods and devices for preparing anhydrous hydrogen fluoride and sulfuric acid.The method comprises the following steps: removing impurities from industrial waste fluorosulfuric acid, mixing it with concentrated sulfuric acid to form a pretreated mixture; using microwave heating to rapidly heat the reactor, a static bed is arranged in the reactor; the pretreated mixture is passed into the upper surface of the static bed in the preheated reactor, the pretreated mixture is heated by microwave, and hydrogen fluoride and sulfur trioxide gas are generated by the decomposition of the pretreated mixture; hydrogen fluoride and sulfur trioxide are mixed and passed into low-temperature concentrated sulfuric acid to absorb sulfur trioxide gas; then passed into low-temperature condensing equipment, and liquid hydrogen fluoride is collected; the liquid hydrogen fluoride is purified by rectification; and the concentrated sulfuric acid that absorbs sulfur trioxide is evaporated and concentrated.The advantages are: using a "static bed + material" double-wave absorption system, achieving more uniform and stable temperature field distribution in the liquid layer of industrial waste fluorosulfuric acid, making the pyrolysis of industrial waste fluorosulfuric acid more efficient and stable.

An integrated process for co-production of phosphorus pentafluoride (PF5) and fluorosulfonic acid (HSO3F) in high yield and purity through a single reaction step is provided. The method comprises reacting a first reagent comprising an aqueous solution of hexafluorophosphoric acid (HPF6) and hydrofluoric acid (HF) with a second reagent comprising fuming sulfuric acid (H2SO4SO3), and recovering a product mixture comprising phosphorus pentafluoride (PF5) and fluorosulfonic acid (HSO3F).

The application discloses a method for removing fluorosulfonic acid in bisfluorosulfonylimide, and the method comprises the following steps: reacting crude bisfluorosulfonylimide containing fluorosulfonic acid with inorganic acid salt or organic acid salt, and distilling the reaction product to remove fluorosulfonic acid in the bisfluorosulfonylimide. The application effectively solves the problem that fluorosulfonic acid is difficult to be completely removed in the prior art, and has the advantages of simple operation, low cost, high efficiency and good effect.

A bio-electrode composition contains (A) a reaction composite of a monomer having an ionic functional group and a carbon particle. The component (A) contains the carbon particle bonded to the monomer having a structure selected from the group consisting of salts of ammonium, lithium, sodium, potassium, and silver formed with any of fluorosulfonic acid, fluorosulfonimide, and N-carbonyl-fluorosulfonamide. Thus, the present invention provides: a bio-electrode composition capable of forming a living body contact layer for a bio-electrode which is excellent in electric conductivity and biocompatibility, light-weight, and manufacturable at low cost, and which prevents significant reduction in the electric conductivity even when wetted with water or dried; a bio-electrode including a living body contact layer formed of the bio-electrode composition; and a method for manufacturing the bio-electrode.

The present invention relates to an anion-containing compound which has an S=O bond and an S-F bond and has a fluorosulfonic acid anion as a constituent component, the anion-containing compound being used in a battery that has a negative electrode which contains elemental niobium.

The present invention relates to a living body electrode composition, a living body electrode, and a manufacturing method of a living body electrode. The present invention provides a living body electrode composition capable of forming a living body contact layer for a living body electrode that is excellent in conductivity and biocompatibility, lightweight, and capable of being manufactured at low cost, whose conductivity does not greatly decrease regardless of being wetted with water or dried, and that is soft and excellent in stretchability and adhesiveness. The present invention provides a living body electrode composition containing (A) a polysiloxane; the (A) polysiloxane is bonded to an ionic polymer and has a structure (except for a cage structure) containing a T unit represented by the following general formula (T1); (R 0 SiO 3 / 2 )(T1) In the formula, R 0 is a linking group to the aforementioned ionic polymer; and the aforementioned ionic polymer is a polymer containing a repeating unit having a structure selected from any one of an ammonium salt, a lithium salt, a sodium salt, a potassium salt, a silver salt of a fluorosulfonic acid, a fluorosulfonimide, and an N-carbonylfluorosulfonamide.

This application belongs to the field of chemical technology. It provides a method for purifying bis(fluorosulfonyl)imide, as well as the purified bis(fluorosulfonyl)imide and its salt. The purification method includes: reacting the bis(fluorosulfonyl)imide to be purified with a decontaminating agent to obtain a mixture; the decontaminating agent includes a resin with a nitrogen-containing aromatic ring group; the bis(fluorosulfonyl)imide to be purified includes fluorosulfonic acid; and separating the mixture to obtain purified bis(fluorosulfonyl)imide. The decontaminating agent provided in this application contains a resin with a nitrogen-containing aromatic ring group. This resin reacts with fluorosulfonic acid to ultimately form an ammonium fluorosulfonate salt. The fluorosulfonic acid is chemically adsorbed onto the resin with the nitrogen-containing aromatic ring group, thus facilitating the separation of fluorosulfonic acid and bis(fluorosulfonyl)imide without introducing new anionic impurities.

Provided are a lithium iron fluorosulfate positive electrode material, a preparation method therefor, and a use thereof. The positive electrode material comprises lithium iron fluorosulfate, and carbon nanotubes coated on the lithium iron fluorosulfate. The positive electrode material is secondary particles, and the particle size of the secondary particles is 2-10 μm. The secondary particles are composed of nanoscale primary particles, and the particle size of the primary particles is 20-200 nm. The preparation method comprises the following steps: 1) grinding lithium fluoride to a particle size of 10 μm or less; 2) ball milling and mixing the ground lithium fluoride with ferrous sulfate and carbon nanotubes, to obtain a mixture; and 3) performing calcining on the mixture, to obtain a lithium iron fluorosulfate positive electrode material. The positive electrode material has better electronic conductivity and ionic conductivity, a higher specific capacity, and better cycle performance, as well as excellent high-temperature performance and low-temperature performance.

The present invention relates to a process for producing lithium fluorosulfonate, which comprises a step of reacting a lithium salt and fluorosulfonic acid in a non-aqueous solvent, wherein the lithium salt is a lithium salt which does not produce water as a result of the reaction step.

A sulfonium salt monomer consists of a sulfonium cation having pentafluorosulfanyl and hydrocarbyloxycarbonyl groups and a fluorosulfonic acid anion having a polymerizable group. A resist composition comprising a polymer comprising repeat units derived from the monomer exhibits a high solvent solubility, high sensitivity and high contrast and forms a small-size pattern having satisfactory lithography properties such as LWR, CDU, EL and DOF.

The invention belongs to the technical field of optical crystal materials, and particularly relates to a melamine fluorosulfonate nonlinear optical crystal and a growth method and application thereof. The preparation method comprises the following steps: taking C3N6H6 and HSO3F as raw materials to prepare a melamine fluorosulfonate compound; and enabling the melamine fluorosulfonate crystal to directionally grow on the surface of the seed crystal by adopting a top seed crystal method to obtain the melamine fluorosulfonate nonlinear optical crystal. The spatial arrangement and the group density of a pi-conjugated [C3N6H8] group are effectively adjusted by using a fluorosulfonic acid group, and meanwhile, the compound has a relatively large frequency-doubled effect, a short ultraviolet cut-off edge and proper birefringence (0.064 at-1064nm), and can realize direct frequency-doubled output of short-wavelength ultraviolet laser. Compared with beta-barium borate, the birefringence of the material is reduced by about 44%, the walk-off effect is effectively avoided, and the material has application prospects in all-solid-state 266 nm ultraviolet lasers.

The present invention is a bio-electrode composition containing an ionic polymer material as a component (A), where the component (A) includes a polymer having: a repeating unit-a having a structure selected from the group consisting of salts of ammonium, sodium, potassium, and silver formed with any of fluorosulfonic acid, fluorosulfonimide, and N-carbonyl-fluorosulfonamide; and a repeating unit-b having a nitro group. This provides: a bio-electrode composition capable of forming a living body contact layer for a bio-electrode that is excellent in electric conductivity and biocompatibility, is light-weight, can be manufactured at low cost, can control significant reduction in conductivity either when the bio-electrode is soaked in water or dried, and is soft and has excellent stretchability and adhesiveness; a bio-electrode including a living body contact layer formed of the bio-electrode composition; and a method for manufacturing the bio-electrode.

The invention relates to a method for at least partially removing fluorosulfonic acids and / or derivatives thereof from a crude bis (fluorosulfonyl) imine mixture containing a hydrogen bis (fluorosulfonyl) imine compound, and fluorosulfonic acids and / or derivatives thereof, so as to produce a purified mixture by reacting the crude mixture in the molten phase with a halide or sulfate.

This invention provides a method for removing impurities from bis(fluorosulfonyl)imide. The crude bis(fluorosulfonyl)imide after fluorination is first purified by one-step distillation. After reaching the impurity removal temperature, an impurity removal agent is added to carry out the impurity removal reaction. Finally, the product is filtered through a filter membrane to remove impurities such as fluorosulfonic acid and sulfur- or oxygen-containing acid groups, thereby obtaining high-purity bis(fluorosulfonyl)imide. This impurity removal method does not introduce foreign ions and has a significant impurity removal effect.

The application provides a synthesis method of difluorosulfimide. The method comprises the following steps: under nitrogen protection, fluorosulfonic acid, aminosulfonic acid and a catalyst are added into a reaction container, stirring is performed, and the temperature is raised to a reaction temperature; then sulfuryl fluoride is introduced, and the reaction is kept under temperature while the sulfuryl fluoride is introduced; after the reaction is completed, the difluorosulfimide is obtained through rectification. The method is simple in process, can quickly and efficiently synthesize difluorosulfimide, and the obtained difluorosulfimide has high yield and high purity.

The invention relates to a preparation method of lithium bis (fluorosulfonyl) imide liquid salt, which comprises the following steps: step 1, reacting hexamethyldisilazane, fluorosulfonic acid and organic alkali serving as raw materials in the presence of a first solvent and in an inert gas atmosphere, and removing a reaction solvent by reduced pressure distillation after the reaction is finished, washing the concentrated solution with water, and drying to obtain organic alkali salt of bis (fluorosulfonyl) imide; and 2, reacting the organic alkali salt of the imidodisulfuryl fluoride with an alkaline lithium source in the presence of a second solvent, and after the reaction is finished, filtering, crystallizing and drying to obtain the high-purity lithium imidodisulfuryl fluoride, and 3, adding the obtained lithium bis (fluorosulfonyl) imide into DMC (dimethyl carbonate), and dissolving to prepare a DMC solution with the concentration of about 30% so as to obtain the lithium bis (fluorosulfonyl) imide liquid salt. The method overcomes the problems of high production cost, complex process, low yield and purity and the like caused by production of a large amount of water, acid gas and organic matters in the preparation process of the lithium bis (fluorosulfonyl) imide liquid salt and many purification steps in the prior art.

The invention belongs to the technical field of residual acid treatment, and particularly relates to a method for converting fluorosulfonic acid into hydrofluoric acid through residual acid steam stripping. The invention relates to a continuous chemical production system with multiple reaction kettles connected in series through residual acid steam stripping. The continuous chemical production system comprises a first reaction kettle, a second reaction kettle, a third reaction kettle, a residual acid input pipe, a water supplementing header pipe and a hydrofluoric acid discharging header pipe, the first reaction kettle, the second reaction kettle and the third reaction kettle are sequentially communicated through pipelines; and the output end of the residual acid input pipe is communicated with the first reaction kettle. The method for converting fluorosulfonic acid into hydrofluoric acid through residual acid steam stripping comprises the steps of 1) raw material pretreatment, 2) product separation and purification, 3) hydrofluoric acid gas treatment and the like. By controlling the mass ratio of residual acid to water in the first reaction kettle, the second reaction kettle and the third reaction kettle and controlling the reaction temperature and time, high-efficiency hydrolysis of fluorosulfonic acid can be realized, the content of fluorosulfonic acid in the solution after reaction can be controlled below 0.05%, and the purity of sulfuric acid is effectively improved.

This invention discloses a method for preparing a corrosion-resistant and conductive composite coating for electrodes in the field of electrochemical technology. The method first pre-treats the surface of a copper electrode by grinding and cleaning. Then, a specially prepared yttrium-functionalized two-dimensional layered carbonitride and Schiff base two-dimensional heterostructure material are dispersed in a mixed solvent and formulated with epoxy resin, additives, and a curing agent to form a coating slurry. This slurry is then sprayed and cured in stages onto the electrode surface to form a composite coating. The key modifying material used in this coating is obtained by interfacial assembly of titanium aluminum carbide (after fluorosulfonic acid exfoliation and amination) with a Schiff base complex synthesized from dihydroxyterephthalaldehyde and diaminocyclohexane and coordinated with yttrium ions, followed by heat treatment. This material forms a stable heterostructure in the coating, synergistically exhibiting excellent conductivity and corrosion resistance. The resulting coating has advantages such as strong adhesion, low resistivity, and good salt spray resistance. The preparation process is simple and suitable for the protection of various industrial electrodes.

The invention discloses a preparation method of sulfuryl fluoride and the sulfuryl fluoride. The preparation method comprises the following steps: mixing a liquid sulfur-containing oxide with a fluoride salt, and carrying out a liquid-solid reaction to obtain a fluorosulfonic acid compound; performing thermal decomposition on the fluorosulfonic acid compound to prepare sulfuryl fluoride; wherein the chemical formula of the fluorosulfonic acid compound is M (SO3F) X, M represents a metal cation or an ammonium ion, and x represents the valence of the metal cation or the ammonium ion. The preparation method is simple, and the prepared sulfuryl fluoride is high in purity and yield.

The application relates to a high-oxygen-permeability hydrogen-containing fluorosulfonic acid resin and a preparation method and application thereof, and belongs to the technical field of electrolyte materials for fuel cells. The application solves the technical problems of poor oxygen permeability and high cost of fluorosulfonic acid resin in the prior art. The preparation method comprises the following steps: polymerizing a norbornene series monomer A and a perfluorovinyl ether monomer B containing sulfonyl fluoride under the initiation of an iron complex, then soaking the obtained sulfonyl fluoride type fluorosulfonic acid resin in an alkaline solution to hydrolyze the -SO2F group into a -SO3X group, and then soaking the obtained sulfonyl fluoride type fluorosulfonic acid resin in an acidic solution to convert the -SO3X group into a -SO3H group, so as to obtain the hydrogen-containing fluorosulfonic acid resin. The preparation method of the hydrogen-containing fluorosulfonic acid resin has the advantages of mild conditions, simple operation, low production cost, good processability of the obtained hydrogen-containing fluorosulfonic acid resin in general solvents, high conductivity, good oxygen permeability and the like, and the hydrogen-containing fluorosulfonic acid resin can be applied as an electrolyte material of a cathode catalyst layer in a proton exchange membrane fuel cell.

This invention relates to the field of hydrogen fluoride preparation technology, specifically to a method for preparing hydrogen fluoride. The method includes the following steps: a decomposition reaction is carried out between concentrated fluorosilicic acid and concentrated sulfuric acid to remove silicon tetrafluoride gas, resulting in fluorinated sulfuric acid. One to two trifluoromethyl-substituted phenyl compounds are added to the fluorinated sulfuric acid, followed by distillation. By distilling the fluorinated sulfuric acid under the influence of the one to two trifluoromethyl-substituted phenyl compounds, the phenyl compounds form numerous fine droplets that are uniformly dispersed in the mixture. These droplets then insert into the spaces between fluorosulfonic acid molecules, disrupting the molecular cluster structure and allowing fluorosulfonic acid to exist as individual molecules. This makes the S-F bonds in the fluorosulfonic acid molecules more readily accept external energy and break, significantly reducing the energy required to decompose fluorosulfonic acid and significantly lowering the distillation temperature while increasing the yield of hydrogen fluoride products.

The invention discloses a sulfur-fluorine mixed acid evaporation, concentration and separation system, which comprises a mixed acid separation and concentration device used for heating, concentrating and separating sulfur-fluorine mixed acid, cooling obtained hydrofluoric acid steam to prepare hydrofluoric acid, and conveying obtained low-fluorine sulfuric acid to a sulfuric acid fluorine removal device through a pipeline; the sulfuric acid defluorination device is used for heating and separating low-fluorine sulfuric acid and removing fluorine-containing substances in the low-fluorine sulfuric acid, obtained sulfuric acid is conveyed to the sulfuric acid concentration device through a pipeline, and obtained hydrofluoric acid steam is cooled to prepare hydrofluoric acid; and the sulfuric acid concentration device is used for heating and concentrating sulfuric acid, and the obtained concentrated sulfuric acid is reused in the mixed acid separation and concentration device to obtain production water containing trace sulfuric acid. The invention also discloses a sulfur-fluorine mixed acid evaporation, concentration and separation method. According to the method, high-concentration concentrated sulfuric acid can be obtained from the low-concentration sulfur-fluorine mixed acid in the evaporation and concentration process, and comprehensive utilization of F and S resources is achieved.

An object of the present invention is to provide a non-aqueous electrolytic solution secondary battery capable of improving low-temperature output characteristics.The problem is solved by a secondary battery including a non-aqueous electrolytic solution containing fluorosulfonic acid ions, difluorophosphate ions, and bisoxalate borate ions, in which [FSO3−]>[PO2F2−]>[BOB−] is satisfied in the non-aqueous electrolytic solution.

The present disclosure belongs to the technical field of hydrogen fluoride preparation. Specifically disclosed are a method for preparing anhydrous hydrogen fluoride, anhydrous hydrogen fluoride and the use thereof. The method comprises: mixing first fluorine-containing sulfuric acid with water for reaction to obtain a reaction solution containing hydrogen fluoride; evaporating the reaction solution containing hydrogen fluoride to obtain an evaporated liquid phase and an evaporated gas phase; washing the evaporated gas phase to obtain a washed gas phase; and condensing the washed gas phase to obtain anhydrous hydrogen fluoride. The method of the present disclosure has relatively low costs and high economic benefits, the yield of by-product sulfuric acid is about 1.5 times lower than that of the fluosilicic acid method, the application field of by-product sulfuric acid is wider than that of by-product sulfuric acid of the fluosilicic acid method, and the preparation process involves a reduced environmental burden. Meanwhile, the present disclosure adopts the by-product fluorine-containing sulfuric acid to prepare anhydrous hydrogen fluoride, thus achieving recycling of resources.

The application discloses a method for synthesizing high-purity lithium bisfluorosulfonimide by a step-by-step method. The method adopts a step-by-step reaction idea, slowly introduces sulfuric fluoride under the action of triethylamine in an ammonia gas filled environment, generates fluorosulfonamide triethylamine salt, replaces the fluorosulfonamide with a strong acid to obtain fluorosulfonamide as an intermediate, and then continues to react with sulfuric fluoride to obtain bisfluorosulfonimide triethylamine salt. In the lithiumation process, potassium carbonate is used to replace triethylamine to obtain KFSI, and then LiBF4 is used to react with KFSI to obtain LiFSI, so that the introduction of anion impurities is avoided, and the synthesis of high-purity lithium bisfluorosulfonimide is provided with conditions. The method has the following advantages: 1. The method avoids the use of strong corrosive fluorosulfonic acid as a raw material, and the raw material is cheap and easy to obtain; 2. The method does not need a fluorination process; and 3. The step-by-step method can control the reaction, and high yield (96.97%) and high purity (≥99%) of the product can be realized.

In order to solve the problems of unstable interfaces of a positive electrode and a negative electrode of the lithium ion battery, HF erosion, gas production and the like, the invention provides the lithium ion battery and the electrolyte thereof, the electrolyte comprises an organic solvent, a lithium salt and additives, and the additives comprise a first additive and a second additive, the structural formula of the first additive is as follows: R1, R2 and R3 are respectively and independently selected from halogen atoms, fluorosulfonic acid groups or trifluoromethanesulfonic acid groups, and at least one of R1, R2 and R3 is the fluorosulfonic acid group or the trifluoromethanesulfonic acid group; the second additive is a halogenated pyridine derivative, at least one hydrogen atom on a pyridine ring of the halogenated pyridine derivative is substituted by a halogen atom, and through the synergistic effect of the first additive and the second additive, the stability of a positive-negative electrode interface of the battery is effectively improved, and HF erosion and gas production are inhibited; therefore, the cycle life, the high-temperature performance, the rate capability and other electrochemical performances of the high-energy-density battery are effectively improved.