142 results about "Fluorosulfuric acid" patented technology

A suite of polymer/zeolite nanocomposite membranes. The polymer backbone is preferably a film forming fluorinated sulfonic acid containing copolymer, such as a Teflon type polymer, a perfluorinated polymer, or a perfluorinated polymer with sulfonic groups. The zeolites formed in accordance with the present invention and which are used in the membranes are plain, phenethyl functionalized and acid functionalized zeolite FAU(Y) and BEA nonocrystals. The zeolite nanocrystals are incorporated into polymer matrices for membrane separation applications like gas separations, and in polymer-exchange-membrane fuel cells. For the purpose of developing zeolite-polymer nanocomposite membranes, the zeolite nanocrystals are size-adjustable to match the polymer-network dimensions.

There is provided a process for producing an α-substituted ester by reaction of a fluorosulfuric acid ester of α-hydroxyester with a Grignard reagent in the presence of a zinc catalyst. It is newly found that the reaction for production of α-substituted esters, in which the raw reaction substrate is limited to expensive trifluoromethanesulfonic acid esters, can proceed favorably with the use of fluorosulfuric acid esters suitable for mass-production uses. By the use of the fluorosulfuric acid ester high in optical purity, it is possible to obtain the α-substituted ester with high optical purity upon inversion of the asymmetric carbon configuration. The process of the present invention can solve all of the prior art problems and can be applied for industrial uses.

Provided is a member for electrophotography that is not reduced in charge-providing performance even by its long-term storage and use under a high-temperature and high-humidity environment, and is hence conducive to the formation of a high-quality electrophotographic image. The member for electrophotography includes: an electroconductive substrate; and an electroconductive layer, in which: the electroconductive layer contains a resin having a cationic organic group in a molecule thereof and an anion; a total sum of contents of an alkali metal and an alkali earth metal in the electroconductive layer is 500 ppm or less; and the anion includes at least one selected from the group consisting of a fluorosulfonate anion, a fluorocarboxylate anion, a fluorosulfonylimide anion, a fluorosulfonylmethide anion, a fluoroalkylfluoroborate anion, a fluorophosphate anion, a fluoroantimonate anion, and a fluoroarsenate anion.

The present invention provides a bio-electrode composition including: (A) an ionic material; and (B) a resin other than the component (A); wherein the component (A) contains both of a repeating unit-a having a structure of any of silver salts of fluorosulfonic acid, fluorosulfonimide, and fluorosulfonamide; and a repeating unit-b having silicon. This can form a living body contact layer for a bio-electrode that is excellent in electric conductivity and biocompatibility, light in weight, manufacturable at low cost, and free from large lowering of the electric conductivity even when it is wetted with water or dried. The present invention also provides a bio-electrode in which the living body contact layer is formed from the bio-electrode composition, and a method for manufacturing the bio-electrode.

An adhesive composition including a resin and electro-conductive material, wherein the electro-conductive material is an ammonium salt of fluorosulfonic acid having 5 or more carbon atoms shown by the general formula (1): (R¹—X—Z—SO₃⁻)_n Mⁿ⁺ (1), wherein, R¹ represents a monovalent hydrocarbon group having 1 to 40 carbon atoms and optionally substituted by a heteroatom or optionally interposed by heteroatom; X represents any of a single bond, ether group, ester group, and amide group; Z represents an alkylene group having 2 to 4 carbon atoms, containing 1 to 6 fluorine atoms, and optionally containing a carbonyl group; M⁺ represents a cation having one or two ammonium cation structures. This can form a living body contact layer for a bio-electrode with excellent electric conductivity, biocompatibility, and light weight, which manufactures at low cost and does not cause large lowering of the electric conductivity even when it is wetted with water or dried.

The invention provides a nanometer porous and super-hydrophobic skeleton strong solid acid material and a preparing method thereof. The preparing method comprises the following steps: a, polymerizing divinyl benzene under a solvothermal condition, wherein benzoyl peroxide is used as an initiator, polymerizing is carried out at a temperature between 80DEG C and 180DEG C for 12-48h, 7-25mL of corresponding solvent is used each time when 2g of divinyl benzene monomer is used, and the mass ratio of the initiator to the divinyl benzene is 0.015-0.0375; b, adding a solvent to the nanometer porous polydivinyl benzene material which is prepared in the step a, and adding a sulfonating agent to carry out sulfonating, wherein carbon tetrachloride or methylbenzene is used as the solvent, trifluoromethane sulfonic acid or fluorosulfuric acid is used as the sulfonating agent, the volume ratio of the solvent to the sulfonating agent is 10:1, the mass ratio of the PDVB (Polydivinyl Benzene) to the sulfonating agent is (5-10):1, and sulfonating is carried out in a range between 80DEG C and 110DEG C for 12-36h.

The invention discloses a preparation method of a modified perfluorosulfonic acid proton exchange membrane for a fuel battery. The preparation method comprises the following steps of mixing lignin, diethyl ether and distilled water, and stirring to react for 1 to 3h at the temperature of 90 to 110 DEG C and rate of 150 to 200r/min; reducing the temperature of a solution to 40 to 50 DEG C, leadingchloride gas at the rate of 2ml/min, and continuing to react for 10 to 20min; then, adding p-toluene sulfonic acid, increasing the temperature to 60 to 80 DEG C, stirring to react for 30 to 50min at the rate of 200 to 300r/min, and distilling, so as to obtain a product; adding the distilled product into a membrane casting liquid of the perfluorosulfonic acid proton exchange membrane; uniformly treating by ultrasonic waves at the temperature of 50 to 60 DEG C, so as to obtain a mixed solution; casting the mixed solution into a die, putting into an oven with the temperature of 120 to 140 DEG C,sucking vacuum, and maintaining for 8 to 20h, so as to obtain a composite proton exchange membrane; sequentially soaking for 20 to 30min in a hydrogen peroxide water solution, and soaking for 30 to 40min in 20% sulfuric acid, so as to obtain the modified perfluorosulfonic acid proton exchange membrane for the fuel battery.

A resist composition is provided comprising a base polymer containing an iodized polymer, and an acid generator containing a sulfonium salt and/or iodonium salt of iodized benzene ring-containing fluorosulfonic acid. When processed by lithography, the resist composition exhibits a high sensitivity, low LWR and improved CDU independent of whether it is of positive tone or negative tone.

The method includes steps: first, positive ionized Nano Pd granules is synthesized from Pd salt deoxidized in aqueous solution of cation polymer in ammonium class and reducing agent; then, fluorosulfuric acid type proton exchange membrane is dipped in water decentralization liquid of positive ionized Nano Pd granules; thus, Pd granules are static self-assembled to exit and entrance of sulfonic acid radical group in methanol infiltration channels formed on surface of proton exchange membrane so as to reduce penetrability of methanol to membrane. Advantages are: less loading noble metal Pd, and no inference on proton conducting power basically.

The invention discloses a preparation method of lithium fluorosulfonate, which comprises the following steps: (1) taking metal fluorosulfonate (MFSO3) with the purity of >=98.5% as a raw material, and carrying out metathesis exchange reaction with organic lithium salt in an ester, alcohol, nitrile or amide solvent; (2) generating insoluble organic metal salt precipitate, pumping in vacuum, extracting by using a poor solvent of an organic metal salt, filtering, separating, concentrating under reduced pressure, adding a low-polarity aprotic solvent into the concentrated solution, standing, crystallizing, and carrying out vacuum drying to obtain the high-purity lithium fluorosulfonate product. The preparation method of the high-purity lithium fluorosulfonate is simple in post-reaction treatment method, high in product yield, high in purity and capable of effectively reducing the content of impurities such as potassium ions, sodium ions, calcium ions, chloride ions and moisture in the product. The preparation method provided by the invention has the characteristics of simple operation steps, reasonable production cost, high safety, wide substrate selection range, low cost and high product purity.

The present invention provides a method of converting a hydroxy group in alcohols containing an electron withdrawing group into perfluoroalkane sulfonate and fluorosulfonate esters, which are good leaving groups, with inversion of configuration where the hydroxyl-bearing carbon is chiral. The method consists of converting an alcohol to an O--N,N-dialkylsulfamate ester and reacting it with a perfluoroalkansulfonic or fluorosulfonic acid. The method has applications in the synthesis of pharmaceutical and agrochemical compounds.

A bio-electrode composition includes (A) an ionic material and (B) a silicon material powder. The component (A) is a polymer compound containing a repeating unit-a having a structure selected from an ammonium salt, a sodium salt, a potassium salt, and a silver salt of 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 that is excellent in electric conductivity and biocompatibility, is light-weight, can be manufactured at low cost, and can control significant reduction in the electric conductivity even when the bio-electrode is 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 discloses a method for preparing 1,1,1-trifluoroethane and 1,1,1-difluorochloroethane. In the existence of liquid phase fluorinated catalyst and additive, VDC and hydrogen fluoride are reacted in liquid phase. The liquid phase fluorinated catalyst is selected from halide of metal antimony, tin, titanium, tantalum, niobium or fluorosulfuric acid or chlorosultonic acid. The additive comprises at least one kind of phenolic compound, and can be added with organic phosphorus compound. The inventive method can effectively reduce tarry matters generation, thereby prolonging useful life of the catalyst and improving its efficiency.

The invention relates to a method for removing trace impurities in lithium bis (fluorosulfonyl) imide, which comprises the following steps: (1) adding a good solvent into a mixture of lithium bis (fluorosulfonyl) imide and an inert solvent, and filtering to provide a first filtrate; (2) adding an impurity removal agent into the filtrate to form a mixed solution, and filtering to provide a second filtrate; and (3) carrying out reduced pressure distillation on the second filtrate to provide a finished product of the bis (fluorosulfonyl) imide lithium salt. The indexes of the lithium bis (fluorosulfonyl) imide salt finished product accord with one or a combination of more of the following items: the ion chromatography content is greater than or equal to 99.5%, sulfate radical impurity anions are less than or equal to 100ppm, fluorine ion impurity anions are less than or equal to 200ppm, sulfamic acid content anions are less than or equal to 10ppm, fluorine sulfonic acid impurity anions are less than or equal to 10ppm, acidic impurities are less than or equal to 100ppm, the turbidity of the 10% dimethyl carbonate solution is smaller than or equal to 20 mg/L, and the chromaticity is smaller than or equal to 20 Hazen.

The invention discloses a fluorine-containing sulfonate electrolyte additive, an electrolyte containing the additive and a lithium ion battery, the electrolyte additive comprises the following structural formula I, A can be one of benzene ring, pyridine and silane; B may be a fluoroalkyl group. In addition, the general structural formula of the fluorine-containing alkyl in the structural formula is CaFmHn, a is equal to 1-6, n is greater than or equal to 0, m is greater than or equal to 1, and m + n is 2a + 2. The additive can react on the positive electrode and the negative electrode of the battery to form a stable interface film on the surface of the electrode, so that the cyclic gas production of the electrolyte is effectively inhibited, the cycle performance and the low-temperature discharge performance of the electrolyte under high voltage are improved, and particularly, the excellent performance of the lithium cobalt oxide and NCM ternary system lithium ion battery under high temperature and high voltage can be ensured.

The invention relates to a polytetrahydrofuran preparation and purification method using alcamines substances or single alcohol substance and water as a end-capping reagent, especially relates to a polymerization method of polytetrahydrofuran single alcohol and diol mixture. The invention employs the problem that the polytetrahydrofuran diol prepared by the fluosulfonic acid method, the acetic anhydride-perchloric acid method and the concentrated sulfuric acid method has wide distribution and high viscosity, and the product should be melted by higher temperature for usage, and if the heteropoly acid method is out of control, the gel will be appeared. The invention provides a new method which employs a certain amount of hydramine or single alcohol as the end-capping reagent to prepare polytetrahydrofuran, and uniform mixing of the polytetrahydrofuran and the polytetrahydrofuran diol prepared by the end-capping reagent water can be used as a novel raw material widely applied in the fields of spandex fiber, polyurethane elastomer, ester and ether copolymerization elastomer, petrochemical industry, spaceflight, etc.

The invention discloses a method for preparing lithium fluorosulfonate by using an organometallic lithium reagent, which comprises the following steps: (1) slowly mixing and reacting the organometallic lithium reagent serving as a lithium source with fluorosulfonic acid under a low-temperature condition in the presence of perfluorohexane serving as a solvent to obtain a lithium fluorosulfonate crude product; and washing the crude product with a reaction solvent for 5 times; (2) carrying out vacuum pumping on the crude product, adding a poor organic solvent of lithium fluorosulfonate, washing for three times, and carrying out vacuum pumping on the poor organic solvent to obtain a solid; (3) adding carbonate, nitrile and alcohol organic solvents into the solid, extracting, filtering, concentrating, adding a low-polarity aprotic solvent into the concentrated solution, and carrying out static crystallization; and (4) filtering the crystals again, and carrying out vacuum drying to obtain the lithium fluorosulfonate product. The preparation steps are carried out without water under the protection of inert gas. According to the preparation method provided by the invention, the lithium fluorosulfonate can be prepared, the yield is high, the product quality is stable, and the content of impurities such as potassium ions, sodium ions, calcium ions, fluorine ions, sulfate ions and water in the product can be effectively reduced.

The invention provides a treatment method and device for lithium hexafluorophosphate synthesis tail gas, belonging to the technical field of tail gas treatment. The treatment method comprises the following steps: absorbing hydrogen fluoride in tail gas by using chlorosulfonic acid, absorbing hydrogen chloride in the tail gas by using sulfur trioxide, and returning phosphorus pentafluoride in the tail gas to a lithium hexafluorophosphate synthesis process for reuse. The treatment device comprises a first-stage absorption tower which internally adopts circulating liquid chlorosulfonic acid as areaction medium and is used for absorbing hydrogen fluoride in the tail gas, and a secondary absorption tower which is used for supplying the liquid sulfur trioxide for a reaction with hydrogen chloride in the tail gas. According to the invention, hydrogen fluoride in the tail gas is absorbed by a reaction with chlorosulfonic acid; a reaction with sulfur trioxide is performed to adsorb hydrogen chloride in the tail gas and to generate chlorosulfonic acid; and hydrochloric acid is not generated in the whole process, the defect of high environmental protection pressure caused by production of alarge amount of hydrochloric acid in the prior art is overcome, the produced chlorosulfonic acid and fluorosulfonic acid are important chemical raw materials, and resource utilization of mixed acid isrealized.

The invention discloses a preparation method of a high-performance proton exchange membrane, relates to the technical field of a fuel cell membrane, and solves the problem that the methanol permeabiliy of the proton exchange membrane containing fluorosulfuric acid is high and is reduced along with the proton conductivity. The method comprises the steps of: dipping the pre-processed proton exchange membrane containing fluorosulfuric acid into 0.1-5wt% of sulfonated polyelectrolyte SPES-NH2 aqueous solution, soaking for 10-40 minutes at 20-80 DEG C; rinsing the SPES-NH2 at the surface of the membrane by deionized water, blowing by nitrogen, then dipping the membrane into 0.05-10wt% of compound aqueous solution containing two aldehyde groups, soaking for 10-40 minutes at 20-60 DEG C; rinsing the compound at the surface by the deionized water, blowing by the nitrogen, repeating the processes and assembling into 5-100 layers to obtain the high-performance proton exchange membrane disclosed by the invention. According to the method disclosed by the invention, the methanol permeability can be reduced and the proton conductivity can be improved.