253 results about "Sulfonyl fluoride" patented technology

This invention discloses a fluorine-containing polymer and its application as ion exchange fiber material. The fluorine-containing polymer is a perfluoro resin containing sulfonylfluoride groups, and is shown in formula 1. The fluorine-containing polymer has ion exchange function, and is prepared by free radical copolymerization of perfluorosulfonyl vinyl ether, tetrafluoroethylene and hexafluoropropylene in the presence of dispersant, solvent and initiator. The dispersant/solvent is mixed solution of melamine derivative containing linear perfluoro hydrocarbon and water. The fluorine-containing polymer can be melt-spun into polymer fibers, which can be woven into fiber network that can be used as the reinforcing network material for ion exchange membranes and chlor-alkali ion membrane to reinforce and improve the ion exchange ability.

A process for preparing a fluoride from its corresponding alcohol comprises the steps of (a) forming a mixture comprising (i) at least one fluorinated, saturated aliphatic or alicyclic sulfonyl fluoride (for example, perfluorobutanesulfonyl fluoride) and (ii) at least one primary or secondary alcohol; and (b) adding a molar excess of at least one strong, aprotic, non-nucleophilic, hindered, double bond-containing, organic base (for example, 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU)) to the mixture.

Stabilized compositions of natriuretic peptides comprise the peptide and an effective stabilizing amount of (i) an alkyl or aryl sulfonyl fluoride protease inhibitor, or (ii) benzamidine:

The invention discloses a method for preparing bis(sulfonyl fluoride) imine and (perfluoroalkyl sulfonyl fluorine sulfonyl) imine alkali metal salt. According to the method, sulfamide is utilized to take reaction with thionyl chloride and chlorosulfonic acid for preparing bis(sulfonyl fluoride) imine or (perfluoroalkyl sulfonyl fluorine sulfonyl) imine, then, the bis(sulfonyl fluoride) imine or (perfluoroalkyl sulfonyl fluorine sulfonyl) imine takes reaction with antimony trifluoride and potassium (rubidium or caesium and the like) carbonate, and corresponding high-purity bis(sulfonyl fluoride) imine potassium (rubidium or caesium) salt or (perfluoroalkyl sulfonyl fluorine sulfonyl) imine potassium (rubidium or caesium) salt can be obtained; and the double decomposition exchange reaction of the potassium (rubidium or caesium) salt and lithium (or sodium) perchlorate or lithium (or sodium) tetrafluoroborate and the like in aprotic polar solvents is utilized to obtain corresponding high-purity lithium (or sodium) salt. The method provided by the invention has the characteristics that the operation step is simple, the products can be easily separated and purified, the purity and the yield are high, the environment pollution is avoided, the method is suitable for industrial mass production, and the like.

The present invention describes the synthesis of new fluorinated elastomers with very low glass transition temperatures (Tg), a good resistance to bases, gasoline and other carburants and good workability properties, these elastomers contain hexafluoropropene (HFP), perfluoro(4-methyl-3,6-dioxaoct-7-ene) sulfonyl fluoride (PFSO2F), vinylidene fluoride (VDF) and/or at least one fluorinated alkene and/or one vinyl perfluorinated ether. In a precise case, they are prepared by radical polymerisation of HFP and PFSO2F or by radical terpolymerisation HFP, PFSO2F and VDF in the presence of different organic initiator, such as peroxides, peresters or diazo compounds.

Disclosed are compositions prepared by free-radical-driven grafting onto hydrocarbons or hydrocarbon ethers of olefinically unsaturated fluorocarbons containing sulfonyl fluoride, fluorosulfonate, fluorosulfonimide, or fluorosulfonyl methide groups, wherein the grafting step is followed by a hydrolysis step in the case of sulfonyl fluoride.

The invention discloses a fluorine-carbon gemini surfactant for oil extraction and a preparation method thereof. The preparation method of the surfactant is as follows: 1) perfluorooctsulfunyl fluoride is dissolved in ethyl acetate, is firstly mixed with polyethylene polyamines and then reacts with potassium hydroxide after being heated to obtain diperfluoro octyl sulfamide; 2) diperfluoro octyl sulfamide is mixed with 2-chlorethanol in an organic solvent and reacts with potassium hydroxide to obtain N-N-alcohol diperfluoro octyl sulfamide; 3) N-N-alcohol diperfluoro octyl sulfamide is mixed with hydrogen peroxide and reacts with potassium hydroxide to obtain the target product. The fluorine-carbon gemini surfactant for oil extraction provided by the invention has comparatively low using concentration, can obviously reduce the surface tension of aqueous phase system, is excellent in temperature and salt resistance, can be used as a surfactant component in polymer-surfactant binary compound flooding and alkali-polymer-surfactant ternary compound flooding systems and can also be directly applied in surfactant flooding.

The invention provides a preparation method of trifluoro methanesulfonic anhydride. The method comprises the following steps of: firstly reacting trifluoro methanesulphonyl fluoride with alkali metal hydroxide to prepare trifluoro mesylate, purifying trifluoro mesylate by recrystallization by utilizing an organic solvent, reacting trifluoro methane sulfonyl chloride with trifluoro mesylate to generate a trifluoro methanesulfonic anhydride crude product, and finally purifying trifluoro methanesulfonic anhydride by atmospheric distillation. The preparation method of trifluoro methanesulfonic anhydride can be used for not only effectively simplifying reaction steps so that the operation process is simple and convenient and the operation is safe, but also avoiding byproducts generated in the process of the traditional method for producing trifluoro methanesulfonic anhydride, and effectively reducing the contents of F<-> and SO4<2-> in the product; by utilizing recrystallization, atmospheric distillation and other methods for purification, the product purity is up to 99.5%; and more importantly, the yield of anhydride is greatly increased and raised to 88% from original 60%.

The invention provides a perfluorosulfonic composite proton exchange membrane for a fuel cell and a preparation method thereof. Perfluorosulfonic resin formed by perfluorosulfonic resin, M-type perfluorosulfonic resin and porous polymer enhanced materials is H-type resin with sulfonic acid groups (-SO3-) or F-type resin with sulfuryl fluoride groups (-SO2F-). The M-type perfluorosulfonic resin is cerium or/and manganese metal ion type perfluorosulfonic resin formed in a way that cerium or/and manganese ions are fully exchanged with sulfonic acid groups or sulfuryl fluoride groups in perfluorosulfonic resin. Cerium or/and manganese ions can be evenly distributed on the membrane body, the thermal stability is high, the heat treatment temperature of the composite membrane is improved, the combination of the porous polymer enhanced materials with the perfluorosulfonic resin is facilitated, the prepared composite proton exchange membrane has good mechanical strength and proton conductivity capacity, and the performance of the fuel cell is improved.

The invention discloses nonaqueous electrolyte by taking asymmetrical (sulfonyl fluoride) (multi-fluorine alkoxy sulfonyl) lithium imide as conductive salt. The nonaqueous electrolyte has the characteristics of high thermal stability, high redox resistance, no aluminum foil corrosion and the like. Under the condition of no additive, the electrolyte material and the lithium ion battery electrode material have favorable compatibility; meanwhile, the electrolyte material has better room-temperature and high-temperature circulation stability than LiPF6, and can serve as a nonaqueous electrolyte additive for improving the high-temperature cycle and storage performances based on the LiPF6 electrolyte.

The invention discloses a method for synthesizing perfluoroalkyl sulfimide alkali metal salt (M[Rf1SO2NSO2Rf2]) which is abbreviated to M[PFSI], wherein Rf1 and Rf2=CmF2m+1, m=1-8, M=Li, Na, K, Rb, and Cs. The method utilizes potassium (rubidium and cesium) salt of perfluoroalkyl sulfamide and perfluoroalkyl sulfonyl fluoride for reaction in the existence of potassium carbonate (rubidium and cesium), so that the potassium (rubidium and cesium) salt of the perfluoroalkyl sulfimide can be conveniently prepared with high yield which is 70-90%; the high-purity corresponding lithium (or sodium) salt (M[PFSI], M=Li and Na) can be obtained through double decomposition exchange reaction of the potassium (rubidium and cesium) salt and lithium perchlorate (or sodium) in aprotic polar solvent (such as acetonitrile, dimethyl carbonate, nitromethane and the like); and the hydrophobic functionalized ionic liquid composed of cations of sulfonium, ammonium or phosphorus with the [PFSI] through reaction of the prepared alkali metal salt and the sulfonium salt, ammonium salt or phosphorus salt of which the side chain contains functionalized functional groups.

The invention provides a high exchange capacity perfluorinated resin of two types of short side-radical sulfonyl fluoride with different structures and bromine side-radical. The resin is a polyprotonic copolymer comprising the following components in total molar fraction: 50-85 percent of tetrafluoroethylene polymerization unit, 5-49 percent of the polymerization unit of the two types of short side-radical sulfonyl fluoride vinyl ether provided with different structures, and1-10 percent of bromine side-radical vinyl ether polymerization unit. A perfluorinated ion exchange membrane prepared by the resin not only has resistance to various chemical reagents, but also has high ion exchange capacity, electric conductivity, mechanical strength and dimensional stability, low membrane resistance and long service life, and is suitable for usage in fuel cells or high-temperature fuel cells. The invention also provides a preparation method and applications of the resin.

The invention provides a fluorine-containing cationic imidazoline corrosion inhibitor and a preparation method thereof. The method comprises the following steps: adding an organic carboxylic acid and diethylenetriamine into a reactor in a molar ratio of 1:(0.1-2); adding a benzene solvent, heating, and performing a reaction at the temperature of 130-165 DEG C; heating, and performing a cyclization reaction at the temperature of 190-210 DEG C; cooling to 80-110 DEG C after the cyclization reaction; dripping perfluoroalkglsulfonyl fluoride after cooling, and performing a thermostatic reaction; and dripping a quaternizing reagent after the thermostatic reaction, and performing a thermostatic reaction to prepare the fluorine-containing cationic imidazoline corrosion inhibitor. The corrosion inhibitor is a rufous sticky liquid and can be miscible with water in any proportion, wherein the flash point is more than 60 DEG C, the condensation point is less than minus 10 DEG C, and the density is between 0.86g/ml and 0.99g/ml. The fluorine-containing cationic imidazoline corrosion inhibitor has the advantages of good metal surface adsorption, easily formed oleophobic metal surface, less possibility of dropping and the like, and can be used for reducing the friction of organic media, such as crude oil, finished product oil and the like, to a vessel surface.

The invention belongs to the technical field of perfluorinated resin, and particularly relates to a preparation method of Perfluorovinyl ether sulfonyl fluoride. A CF2=CF(OCF2CFX)mO(CF2)nSO2F productis directly generated from perfluorovinyl ether sulfonate CF2=CF(OCF2CFX)mO(CF2)nSO2OM by a one-step reaction under the action of a fluorinating reagent CHClFCF2N(C2H5)2,CF3CHFCF2N(C2H5)2. The preparation method has the advantages of simple process, easiness in operation, low reagent cost, avoidance of the production of waste acid gas and waste liquid as well as the increase of multi-step wastageand by-products; reaction steps are reduced, and the use of high-toxicity and high-risk reagents is avoided at the same time, and the yield can be up to 80 percent or more.

The invention discloses a preparation method for a surfactant N-carboxyethyl, N-3-dimethylaminopropyl-perfluoro hexyl sulfonamide, wherein the surfactant N-carboxyethyl, N-3-dimethylaminopropyl-perfluoro hexyl sulfonamide is prepared by carrying out a two-step reaction on perfluoro hexyl sulfonyl fluoride and dimethylamino propylamine. According to the method, the reaction is carried out at a relatively low temperature, thereby avoiding byproduct increase caused by a high temperature reaction; a solvent is added into a second step of the reaction, thereby reducing polymerization reaction of acrylic acid. The fluorine-containing amphoteric surfactant product prepared by the invention is high in purity, and the surface tension (has extremely low surface tension) of an aqueous solution under extremely low addition concentration can be reduced; moreover, the product does not have poisonous and harmful effects on human body and the environment, and is expected to replace perfluorooctylsulfonyl (PFOS) surfactants.

The invention discloses a lithium ion battery electrolyte additive cyclic ethylene carbonate sulfate and a preparation method thereof. The lithium ion battery electrolyte additive cyclic ethylene carbonate sulfate comprises compounds as shown in structural formulas I-V. The preparation method comprises the steps of putting hexahydric alcohol and carbonic ester into a reaction container, then adding organic base or inorganic base as a catalyst, heating to carry out transesterification, and separating by-products under reduced pressure; and adding sulfonyl chloride or sulfonyl fluoride to reactto remove residual hydroxyl, and separating by-products and redundant raw materials under reduced pressure to prepare the cyclic ethylene carbonate sulfate. According to the method, polyol and carbonic ester are subjected to transesterification to prepare cyclic ethylene carbonate, then sulfonyl chloride and sulfonyl fluoride react to remove residual hydroxyl, cyclic ethylene carbonate sulfate isprepared, and the compound structure contains an ethylene sulfate structure and can replace part of DTD to reduce the electrolyte cost.

The invention provides a high exchange capacity perfluorinated resin of two types of short side-radical sulfonyl fluoride with different structures and cyan side-radical. The resin is a polyprotonic copolymer comprising the following components in total molar fraction: 50-85 percent of tetrafluoroethylene polymerization unit, 5-49 percent of the polymerization unit of the two types of short side-radical sulfonyl fluoride vinyl ether with two different structures, and1-10 percent of cyan side-radical vinyl ether polymerization unit. A perfluorinated ion exchange membrane prepared by the resin not only has resistance to various chemical reagents, but also has high ion exchange capacity, electric conductivity, mechanical strength and dimensional stability, low membrane resistance and long service life, and is suitable for usage in fuel cells or high-temperature fuel cells. The invention also provides a preparation method and applications of the resin.

A process for reducing the amount of soluble polymeric fractions in a sulfonyl fluoride polymer. The process comprises contacting the sulfonyl fluoride polymer with a fluorinated fluid followed by separation of the polymer from the fluid. The fluorinated fluid is selected from hydrofluoroethers and hydrofluoropolyethers. The invention further relates to sulfonyl fluoride polymers obtainable by the process and having a heat of fusion not exceeding 4 J/g and containing less than 15% by weight of polymeric fractions having an average content of monomeric units comprising a sulfonyl functional group exceeding 24 mole %.

The sulfonyl fluoride polymers so obtained are particularly suitable for the preparation of ionomeric membranes for use in electrochemical devices.

The invention discloses a preparation method of N-phenyl bis (trifluoromethanesulfonyl) imide. According to the method, trifluoromethanesulfonyl fluoride is adopted as a raw material, in a strong polar solvent, organic alkali is adopted as an acid-binding agent to react with aniline to generate N-phenyl trifluoromethanesulfonamide, most of the solvent is removed through distillation, a weak polarsolvent and a catalyst are added, trifluoromethanesulfonyl fluoride continues to be introduced for the reaction, and N-phenyl bis (trifluoromethanesulfonyl) imide is prepared. According to the scheme,the cost is low, the reaction is mild, excessive trifluoromethanesulfonyl fluoride cannot be discharged to generate pollution without using shielding gas, the prepared product is high in purity and yield, and industrial popularization can be achieved.