79 results about "Fluorosulfonic acid" patented technology

The invention discloses a BOE waste liquid treatment method and device. The method comprises the following steps: replacing hydrogen fluoride in BOE waste liquid with sulfuric acid, evaporating, fractionating and recovering hydrofluoric acid, neutralizing evaporated residual liquid with ammonia to obtain a fluorine-containing ammonium sulfate solution, defluorinating with fluorgypsum slurry to obtain a low-fluorine ammonium sulfate solution, and concentrating and crystallizing to obtain an ammonium sulfate product. The BOE waste liquid is treated by adopting the scheme, the bottleneck of the market capacity of ammonium bifluoride is avoided, the hydrofluoric acid product and the ammonium sulfate product with huge market capacity are produced, the value orientation of turning waste into wealth, circular economy and environmental protection is really realized, and the method is suitable for industrial popularization and application.

The invention discloses an aluminum current collector for a negative-electrode-free sodium metal battery and a preparation method of the aluminum current collector. The method comprises the following steps: (1) respectively cleaning an aluminum foil in water and an ethanol solution to obtain a sample A with a clean surface; (2) annealing the sample A to obtain a sample B which is rich in a sodium-philic metal crystal face and has a uniformly oxidized surface; (3) treating the sample B in a pretreatment surface passivation solution to obtain a sample C; and (4) placing the sample C in an aqueous solution containing fluorosulfonic acid organic ligands, and carrying out water bath treatment to obtain the surface modified aluminum current collector rich in fluorosulfonic acid anion ligands. The crystal face on the surface of the aluminum current collector is changed to generate more hydrophilic metal interfaces; the surface modification of the aluminum current collector is realized through interface ligand exchange by using a fluorine-containing sulfonic acid organic ligand aqueous solution; the electrochemical stability of the aluminum current collector is improved.

The invention belongs to the technical field of separation and purification, and provides a purification method of imidodisulfuryl fluoride, purified imidodisulfuryl fluoride and imidodisulfuryl fluoride lithium. The purification method comprises the operation of removing impurities by using an impurity removing agent, wherein the impurity removing agent comprises bis (fluorosulfonyl) imide salt; the purification method comprises the following steps: mixing an impurity removal agent with to-be-purified bis (fluorosulfonyl) imide, and carrying out ion exchange reaction on fluorosulfonic acid in the to-be-purified bis (fluorosulfonyl) imide and bis (fluorosulfonyl) imide salt to obtain a liquid-phase mixture; and carrying out separation treatment on the liquid phase mixture to obtain purified bis (fluorosulfonyl) imide. The molar ratio of the bis (fluorosulfonyl) imide radical to the fluorosulfonate radical is more than 1: 1; in the step of carrying out the ion exchange reaction on the bis (fluorosulfonyl) imide salt and the fluorosulfonic acid, the reaction temperature is controlled to be 20 DEG C or above. The purification method provided by the invention can effectively reduce regeneration impurities.

The invention discloses a method for separating and enriching 24 perfluorinated compounds in a water environment. The method comprises the following steps: collecting a to-be-detected water sample, filtering, and adding an isotope labeled recovery rate indicator to obtain a pretreated water sample; activating a PWAX solid-phase extraction column by using a 0.1% ammonia water methanol solution, methanol and ultrapure water in sequence, and enriching a water sample through the column; leaching the PWAX solid-phase extraction column with a 25 mM ammonium acetate aqueous solution (pH = 4) to remove water-soluble interference impurities; carrying out vacuum freeze drying on the solid-phase extraction column, and eluting with methanol and 0.1% ammonia water methanol solution; and blowing the collected eluent to 200 L under nitrogen flow, adding 1: 1 methanol and aqueous solution into the obtained residue, redissolving to 1.00 mL, filtering with a filter membrane, and putting into a polypropylene sample injection bottle to complete separation and enrichment. The method disclosed by the invention is simple and convenient to operate, can enrich various types of perfluorinated compounds (including carboxylic acids, sulfonic acids, fluorosulfonic acids and the like) in water, and is wide in application range and relatively high in accuracy.

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 invention belongs to the technical field of chemical engineering, and provides a purification method of imidodisulfuryl fluoride, purified imidodisulfuryl fluoride and imidodisulfuryl fluoride salt. The purification method provided by the invention comprises the following steps: reacting to-be-purified imidodisulfuryl fluoride with an impurity removal agent to obtain a mixture; the impurity removing agent comprises resin with nitrogen-containing aromatic ring groups; the bis (fluorosulfonyl) imide to be purified comprises fluorosulfonic acid; and separating the mixture to obtain the purified bis (fluorosulfonyl) imide. The impurity removal agent provided by the invention contains the resin with the nitrogen-containing aromatic ring group, the resin with the nitrogen-containing aromatic ring group can react with the fluorosulfonic acid to finally form the ammonium fluorosulfonate salt, and the fluorosulfonic acid is chemically adsorbed on the resin with the nitrogen-containing aromatic ring group, so that the separation of the fluorosulfonic acid and the bis (fluorosulfonyl) imide is conveniently realized, and the impurity removal efficiency is improved. New anion impurities are not introduced.

A bio-electrode composition contains (A) a composite of an ionic polymer material and particles. The component (A) contains the particles bonding to the polymer containing a repeating unit 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 invention discloses a method for preparing anhydrous hydrogen fluoride, anhydrous hydrogen fluoride and application, and the method comprises the following steps: mixing first fluorine-containing sulfuric acid with water for reaction to obtain a reaction solution containing hydrogen fluoride; evaporating the reaction liquid 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 is low in cost and high in economic benefit, the yield of the by-product sulfuric acid is about 1.5 times lower than that of a fluosilicic acid method, the application channel of the by-product sulfuric acid is wider than that of the by-product sulfuric acid of the fluosilicic acid method, and the environmental protection pressure in the preparation process is low. Meanwhile, anhydrous hydrogen fluoride is prepared from the by-product fluorine-containing sulfuric acid, so that recycling of resources is realized.

The application relates to a method and a preparation system for preparing hydrogen fluoride from fluosilicic acid, which comprises a reaction kettle, a hydrogen fluoride absorption tower, a condenser and a silicon tetrafluoride absorption tower which are sequentially communicated; a gas outlet of the reaction kettle is communicated with a gas inlet of the hydrogen fluoride absorption tower, and a gas outlet of the hydrogen fluoride absorption tower is communicated with a gas inlet of the condenser; the generated fluorosulfonic acid in the reaction kettle is introduced into a stripping tower, fluorosulfonic acid generated in a side reaction is re-generated into hydrogen fluoride, the generation of intermediate products is reduced, the process route of the application is free of waste residues and waste gas, and fluosilicic acid is effectively utilized.

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 invention relates to a resist material and a pattern forming method. The present invention addresses the problem of providing: a resist material having high sensitivity regardless of the positive type or the negative type and improved LWR and CDU; and a pattern forming method using the same. [Solution] A resist material containing a dionium salt, a divalent anion containing an onium cation, and a benzene oxide anion structure substituted with an iodine atom and a fluorosulfonic acid anion structure bonded to an aromatic ring of the benzene oxide anion structure.

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).

An onium salt monomer consists of an anion having an aromatic ring substituted with a polymerizable group and iodine, a substituent containing a fluorosulfonic acid anion structure and a substituent containing an iodized aromatic ring being appended to the aromatic ring, and a cation. 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 and CDU as well as etch resistance.

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 discloses a method for synthesizing iminostilbene. Using 1-phenylindole as the starting material, under the action of a super strong protonic acid, 1-phenylindole undergoes an intramolecular rearrangement reaction to generate iminostilbene. Among them, the super strong protonic acid is one of chlorosulfonic acid, fluorosulfonic acid, trifluoromethanesulfonic acid, magic acid, fluoroantimonic acid, and sulfuric acid / zirconia. The present invention also optimizes the corresponding reaction conditions, shortens the reaction time, and reduces the occurrence of side reactions. Therefore, it has the advantages of high product yield and short reaction time. The highest product yield reaches 93.8%, the time is 4-8 hours, and the purity is 99%, achieving good technical effects.

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 discloses a purification method of bis (fluorosulfonyl) imide, which specifically comprises the following steps: mixing a bis (fluorosulfonyl) imide crude product with perfluorosulfonate, and carrying out ion exchange reaction; after the reaction, rectifying and separating to obtain purified bis (fluorosulfonyl) imide; the bis (fluorosulfonyl) imide crude product contains 1 ppm to 30 wt% of fluorosulfonic acid, preferably 10 ppm to 5 wt% of fluorosulfonic acid, and more preferably 0.01 to 1 wt% of fluorosulfonic acid. The method comprises the following steps: adding perfluorosulfonate, carrying out an ion exchange reaction on a difluorosulfonyl imide crude product containing fluorosulfonic acid to obtain a mixture of difluorosulfonyl imide, fluorosulfonate and high-boiling-point perfluorosulfonic acid, and carrying out rectification separation to obtain a difluorosulfonyl imide pure product.

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

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 present invention provides a method for preparing a bis(fluorosulfonyl)imide and a method for preparing a lithium salt of bis(fluorosulfonyl)imide, comprising the following steps: (a) mixing fluorosulfonic acid and urea, heating the mixture to 70-90°C for reaction to obtain a reaction product; the molar ratio of the fluorosulfonic acid to the urea being 2:1-1.2; (b) transferring the reaction product to an electrolytic cell, and electrolyzing the reaction product using a platinum electrode as an anode, a graphite electrode as a cathode, and dilute sulfuric acid as an electrolyte solution to treat byproducts; and (c) subjecting the product of step (b) to liquid-liquid extraction, extracting the organic phase and distilling and purifying the bis(fluorosulfonyl)imide under vacuum. The introduction of electrolysis technology optimizes byproduct treatment, optimizes reaction conditions, improves environmental performance, and increases product purity and yield.