70 results about "Fluorosulfuric 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 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 invention relates to a sealing material and a decoloring kettle applied to intermediate synthesis, and belongs to the technical field of composite materials. The compatilizer with a phosphoric acid structure is prepared, the compatilizer is used for treating and modifying the aluminum filler, a quaternary ammonium salt structure and a long-chain alkyl structure are introduced to the surface of the modified aluminum filler, the quaternary ammonium salt structure can generate electrostatic attraction with sulfonic acid groups in perfluorosulfonic acid resin, and the long-chain alkyl structure can generate long-chain alkyl groups in the perfluorosulfonic acid resin; the long-chain perfluoroalkyl structure can be entangled with a polytetrafluoroethylene resin molecular chain, and the two effects are synergistic, so that the binding capacity of the aluminum filler and the polytetrafluoroethylene-perfluorosulfonic acid resin composite material is effectively improved, and a polytetrafluoroethylene phase and a perfluorosulfonic acid resin phase can be bridged; the overall mechanical property of the composite material is effectively improved.

This invention discloses an enhanced long-life proton exchange membrane for hydrogen production via water electrolysis and its preparation method. The enhanced long-life proton exchange membrane for hydrogen production via water electrolysis comprises: a reinforcing material composed of ion exchange fibers, wherein the ion exchange fibers are made of a fluoropolymer with sulfonic acid groups on the side chains; a perfluorosulfonic acid resin, which forms a film on the reinforcing material for gas barrier and proton conduction; and a free radical quencher mixed in the perfluorosulfonic acid resin to capture generated free radicals and improve membrane durability. The thickness of the proton exchange membrane is 50-100 μm. The enhanced long-life proton exchange membrane for hydrogen production via water electrolysis prepared by this invention not only has good conductivity, hydrogen permeability, tensile strength, and water content, but also exhibits better dimensional stability and superior durability.

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 application discloses an interface control liquid for prelithiation electrodes, a preparation method and application, and the interface control liquid comprises a solvent and a metal salt; the solvent comprises one or more of an ether solvent, an ester solvent, a ketone solvent, a hydrocarbon solvent, a nitrile solvent or deionized water; the metal salt comprises one or more of lithium hexafluorophosphate, lithium tetrafluoroborate, lithium hexafluoroarsenate, lithium bisoxalate borate, lithium bisfluorosulfonimide, lithium bistrifluoromethylsulfonimide, lithium perchlorate, lithium fluoride and lithium chloride; the concentration of the metal salt is 0.001 g / mL-10 g / mL; the prelithiation electrode is obtained by supplementing lithium to an electrode by a chemical prelithiation solution; the interface control liquid is used for modifying the prelithiation electrode, the metal salt of the interface control liquid reacts with the chemical prelithiation solution remaining on the surface of the prelithiation electrode, and a solid electrolyte layer containing inorganic lithium salt is generated on the surface of the prelithiation electrode; wherein, the content of the inorganic lithium salt is between 5% and 90%.

This application provides an electrolyte, an electrochemical apparatus, and an electronic apparatus. The electrolyte includes at least two of an additive I, an additive II, or an additive III. The additive I is at least one additive selected from a group consisting of a compound represented by the following formula 1a, a compound represented by the following formula 1b, and lithium difluorophosphate; and The additive II is at least one additive selected from a group consisting of lithium fluorosulfonate, difluorosulfonimide, and bistrifluoromethane sulfonimide. The additive III is at least one additive selected from a group consisting of lithium difluorooxalate borate, lithium bisoxalate borate, and lithium tetrafluoroborate. The electrolyte provided in this application can improve the low-temperature performance and reduce the resistance and thickness swelling rate of electrochemical apparatuses.

The present invention relates to a method for preparing a perfluorosulfonic acid resin, comprising the following steps: S1, adding a fluorinated solvent and a sulfonyl vinyl ether monomer to a reaction vessel to obtain a mixed solution; S2, heating the mixture to a reaction temperature, introducing tetrafluoroethylene into the mixed solution until the reaction pressure is reached, and then adding an initiator to the mixed solution to carry out a polymerization reaction; the initiator is a perfluorooxaalkanesulfonyl fluoride peroxide; S3, maintaining the pressure within the reaction pressure range until the reaction is completed to obtain a solid-liquid mixture, separating the solid polymer from the liquid in the solid-liquid mixture, and then washing, transforming, and drying the solid polymer to obtain a perfluorosulfonic acid resin. The present invention has the advantages of high adjustability, high durability of the obtained perfluorosulfonic acid resin, good process reproducibility, no need for complex cleaning such as coagulation, and no need for fluorine gas for end group treatment.

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 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.

The invention belongs to the field of proton exchange membrane preparation, and particularly relates to a preparation method of a perfluorosulfonic acid proton exchange membrane with high mechanical strength. The perfluorosulfonic acid proton exchange membrane is prepared through four steps of membrane casting solution preparation, base membrane immersion cleaning, base membrane coating and high-temperature curing. The raw materials used in the preparation process meet the environment-friendly requirement; the used acid substances and the hydrophilic inorganic nanoparticles can form hydrogen bonds with water, so that the water retention capacity of the membrane is enhanced, and the working stability range of the membrane is widened; the acid substances and the hydrophilic inorganic nanoparticles can form hydrogen bonds with the resin and the polytetrafluoroethylene base film, so that the finished product film has higher tensile strength and elasticity modulus. The thickness of the film can be accurately controlled by adjusting technological parameters and the solid content of the resin, the application range of the film is expanded, meanwhile, the preparation technology is simple, continuous production is supported, the product consistency is good, the preparation cost is reduced, and industrial application and popularization are facilitated.

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 PVDF composite perfluorosulfonic acid proton exchange membrane and a preparation method and application thereof.The PVDF composite perfluorosulfonic acid proton exchange membrane is of a layered structure, the layered structure sequentially comprises a first perfluorosulfonic acid layer, a polyvinylidene fluoride membrane and a second perfluorosulfonic acid layer from top to bottom, the first perfluorosulfonic acid layer comprises perfluorosulfonic acid resin and ferrous titanate, and the second perfluorosulfonic acid layer comprises perfluorosulfonic acid resin and ferrous titanate; the first perfluorosulfonic acid layer comprises perfluorosulfonic acid resin and ferrous titanate, the second perfluorosulfonic acid layer comprises perfluorosulfonic acid resin and ferrous titanate, the polyvinylidene fluoride membrane comprises polyvinylidene fluoride and ionic liquid, and the PVDF composite perfluorosulfonic acid proton exchange membrane has good mechanical properties, proton conductivity, water absorption and hydrolytic stability.

The invention discloses a polyethylene microporous diaphragm as well as a preparation process and application thereof. The diaphragm is composed of an HDPE base film and a functional coating layer. The coating liquid comprises a polyurethane prepolymer, a synergistic fluorine-containing sulfonic acid polymer solution (8-12%), a boehmite nanofiller (2.5-3.5%), a trifunctional aziridine cross-linking agent (0.8-1.2%), an azodicarbonamide foaming agent (0.5-0.8%) and a dibutyltin dilaurate catalyst (0.08-0.12%) according to a specific ratio, wherein the polyurethane prepolymer is generated by reacting heteroaromatic polyester glycol (15-18%) with aromatic isocyanate (4-6%), and a solvent is DMF (Dimethyl Formamide). The diaphragm has high ionic conductivity, excellent electrolyte corrosion resistance, low thermal shrinkage rate and enhanced mechanical strength, and is particularly suitable for a lithium ion battery with high safety and long cycle life.

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 invention discloses an electrochemical sensor for uric acid detection and a preparation method thereof, and the electrochemical sensor comprises an electrode sensing layer adopting a glassy carbon electrode; the polymer layer is prepared from a cross-linking agent and comprises at least one of glutaraldehyde, a perfluorosulfonic acid polymer, polyaniline and polyvinylidene fluoride; and the porous aromatic skeleton layer is made of a porous PAF-5 material. The electrochemical sensor for uric acid detection is only composed of the electrode sensing layer, the polymer layer and the porous aromatic skeleton layer, and is simple and clear in structure and easy to prepare. In the sensor, the polyvinylidene fluoride is added into the polymer layer and the porous PAF-5 material is added into the porous aromatic skeleton layer, so that the amplification of a uric acid detection signal is realized, the selectivity, the sensitivity and the stability of a sensing platform are improved, the detection limit is reduced, and the sensor has a good clinical diagnosis application prospect.

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.

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 application discloses an esterification method of aryl fluorosulfonate and aryl formate, and belongs to the technical field of organic compound synthesis. In the method, aryl fluorosulfonate and aryl formate are reacted in a solvent under the action of a catalyst, a ligand and a base in a one-pot method, and corresponding esters with good functional group tolerance can be obtained in a medium to good yield. The preparation method uses aryl fluorosulfonate as a coupling substrate, which is cheap and easy to obtain, and uses aryl formate instead of toxic, flammable and difficult-to-handle CO gas, so that the danger of reagent toxicity and potential explosion in the operation process is avoided. The preparation method has the characteristics of simple reaction condition, convenient post-treatment, green step, low pollution and high economic benefit.

This invention relates to a method for preparing perfluorosulfonic acid resin using a microemulsion method. Through the synergistic effect of an aprotic polar solvent, a fluorinated emulsifier, and a non-fluorinated emulsifier, a stable microemulsion system is formed in an aqueous phase via high-pressure homogenization. This effectively solubilizes tetrafluoroethylene and perfluorosulfonyl vinyl ether monomers, enabling efficient polymerization of tetrafluoroethylene and perfluorosulfonyl vinyl ether in nanoscale microdomains under the initiation of inorganic or organic peroxides. The perfluorosulfonic acid resin prepared by this method exhibits good batch stability, high polymerization efficiency, and high product quality.

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.