102results about "Amidosulfonic acid" patented technology

The invention relates to preparation methods of bis(fluorosulfonyl)imide and alkali metal salts thereof. The bis(fluorosulfonyl)imide is prepared by subjecting bis(chlorosulfonyl)imide to react with a fluorinating agent namely hydrogen fluoride. The alkaline metal salts of bis(fluorosulfonyl)imide is prepared by subjecting bis(chlorosulfonyl)imide and alkali metal halides to react with hydrogen fluoride taken as the fluorinating agent and the solvent. The preparation methods can reduce the raw material costs, reduce the material consumption and generation of wastes, improve the raw material utilization rate, product yield, and product purity; moreover, the product purification is easier, the preparation technology process is more concise and more efficient, and the preparation methods provides a very good technical foundation for massive industrial production of bis(fluorosulfonyl)imide and alkali metal salts thereof.

The invention relates to a preparation method of difluoro-sulfimide and lithium difluoro-sulfimide, and belongs to the field of fluorine chemical synthesis. The preparation method comprises the steps that difluoro-sulfimide is obtained by adding fluoro-sulfoxide into a mixture of sulfamic acid or amino sulfonyl fluoride and fluorosulfuric acid for reacting and then subjected to recrystallization and filtration which are conducted at the temperature of minus 100 DEG C to 16 DEG C and / or reduced / normal-pressure distillation and purification which are conducted at the temperature of 60 DEG C to 169 DEG C; difluoro-sulfimide and a lithium-containing substance react in a solvent to obtain lithium difluoro-sulfimide, and then recrystallization, filtration and purification are conducted. According to the preparation method, difluoro-sulfimide can be prepared through one step, lithium difluoro-sulfimide is obtained through lithiation, and the prepared products can be purified; few steps are needed, the technology is simple, the process is easy to control, the requirement on production devices is low, the production efficiency, the product yield and the purity are high, and large-scale production and application can be achieved.

The present invention includes methods / processes and intermediates for preparing compounds having structural Formula (I):wherein X is alkyl, substituted alkyl, alkenyl, substituted alkenyl, heteroalkyl, substituted heteroalkyl, heteroalkenyl, or substituted heteroalkenyl.

The invention discloses a novel sulfamic acid after-treatment process, which comprises: carbamide is adopted to be sulfonated with oleum for preparing sulfamic acid; after the reaction the dilute sulphuric acid with the concentration of 5 to 30 percent is added to regulate the concentration of the sulphuric acid in an reaction kettle to be about 70 percent, and the sulphuric acid is isolated after holding; then the dilute sulphuric acid with the concentration of 1 to 10 percent or water is added into the reaction kettle for a second time acidity regulation to regulate the concentration of the sulphuric acid in the reaction kettle to be 5 to 20 percent; then the high pure product with the purity greater than 99.9 percent can be obtained after recrystallization, filtering and drying. The after-treatment process is easy for operation and the labor hardship is lower; and the purity of the product is high and the quality is better.

The invention discloses a synthesis method for a bis(fluorosulfonyl)imide salt, wherein the method comprises the following steps: (one) under the protection of nitrogen, dissolving a bis(chlorosulfonyl)imide salt in a nonprotic organic solvent to obtain a bis(chlorosulfonyl)imide salt organic solution; (two) under a stirring condition, adding an excess compound fluridizer into the organic solution, then heating to a temperature being 8 DEG C-20 DEG C higher than an organic solvent boiling point temperature, and making the bis(chlorosulfonyl)imide salt to undergo an effective fluorination reaction in the organic solvent, wherein the compound fluridizer is selected from at least two substances of antimony trifluoride, potassium fluoride, zinc fluoride and aluminum fluoride; (three) after the reaction is finished, filtering the reaction liquid, and concentrating the filtrate to obtain a concentrated solution; and (four) crystallizing the concentrated solution, filtering, drying, and thus obtaining the high-purity bis(fluorosulfonyl)imide salt. The synthesis method has the advantages of simple operation, high product productive rate, no toxic reagent to pollute the environment, and high purity of the product, and is suitable for large-scale production in industry.

The invention relates to a technology for preparing nickel sulfamate through the extraction method, belonging to the technical field of fine chemicals. The technology is characterized by comprising the following steps: using the raffinate obtained by extracting the two-stage countercurrent leaching liquor of high grade matte nickel and removing impurities as a stock solution to perform an extraction reaction with hard soap which is prepared from an organic phase and a sodium hydroxide solution according to a specific ratio; and washing a loaded organic phase with acid, and using aminosulfonicacid as a stripping agent to prepare a nickel aminosulfonate solution; and performing evaporation concentration, centrifugation and other working procedures to prepare the finished nickel aminosulfonate product. The invention has a simple technology and less loss of nickel. The massive consumption of resources such as water, electricity and the like can be avoided and the invention is a low-carbon production method suitable for future development.

The invention belongs to the technical field of fluorine chemical industry, and especially relates to a difluoro-sulfonyl imine preparation method and a method for preparing difluoro-sulfonyl imine alkali metal salt by using prepared difluoro-sulfonyl imine. The difluoro-sulfonyl imine preparation method comprises the following steps: polystyrene and antimony pentalfluoride are added in a solvent and are subjected to reaction to obtain polystyrene-loaded antimony pentalfluoride, difluoro-sulfonyl imin liquid is added for a reaction, after the reaction is completed, pumping filtration and underpressure distillation are carried out to obtain the difluoro-sulfonyl imin; the method for preparing difluoro-sulfonyl imine alkali metal salt by using the prepared difluoro-sulfonyl imine comprises the following steps: adding difluoro-sulfonyl imine, an alkali metal compound and polystyrene-loaded antimony pentalfluoride in a reaction solvent, reacting the materials for 6-10 h under the reaction temperature of 0-100 DEG C, filtering the materials after the reaction is completed to obtain a difluoro-sulfonyl imine alkali metal salt crude product, and re-crystallizing the difluoro-sulfonyl imine alkali metal salt crude product to obtain a difluoro-sulfonyl imine alkali metal salt fine product. The method has the advantages of controllable reaction, safety, high efficiency, and high yield, and is suitable for industrial production.

The invention discloses a preparation method of a bis(fluorosulfonyl)amide alkali metal salt. A trivalent metal fluoride is used for fluoridizing a bis(chlorosulfonyl)amide alkali metal salt in an organic solvent into the bis(fluorosulfonyl)amide alkali metal salt, then, a trivalent metal chloride and the bis(fluorosulfonyl)amide alkali metal salt are separated and purified by means of differencesof solubilities of the trivalent metal chloride and the bis(fluorosulfonyl)amide alkali metal salt in different solvents, the method avoids generation of hydrogen chloride gas in the fluorination process, and the fluorination efficiency is high.

The invention relates to a method for preparing fluorine sulfimide lithium and belongs to the field of fine chemical industries. The method comprises the steps as follows: lithium salt and deionized water are prepared into a turbid liquid with the mass concentration of the lithium salt in a range of 20-50% in a reaction still, a refined fluorine sulfimide acid solution is added dropwise to obtain a reaction solution under the condition of stirring, the mass content of the deionized water in the fluorine sulfimide acid solution is in a range of 5-20%, the reaction temperature is in a range of 50-150 DEG C, and the reaction is stopped when the pH value of the reaction solution is in a range of 6-8. Non-vacuum drying is performed on the reaction solution firstly, and when the mass content of the deionized water is lower than or equal to 0.5%, vacuum drying is performed. The method is easy to operate, higher in process safety and capable of effectively improving the purity of products and satisfying requirements of lithium battery industries for the high purity.

The invention discloses a preparation method and a purification process of fluorine-containing lithium sulfimide, and belongs to the technical field of lithium ion battery electrolytes. The preparation process is divided into three steps: (1) a first preparation step: reacting a nitrogen-containing reagent with at least one of a sulfur-containing reagent and a Y-containing reagent to obtain a compound II; and (2) a second preparation step: reacting the compound II with at least one of an oxidation reagent, a lithium-containing reagent and a fluorine-containing reagent to obtain a compound I, namely fluorine-containing lithium sulfimide. Finally, the prepared fluorine-containing lithium sulfimide crude product is subjected to the purification process to obtain a high-purity fluorine-containing lithium sulfimide refined product, and the prepared fluorine-containing lithium sulfimide can be used as an electrolyte lithium salt and an electrolyte additive of a lithium ion battery.

The invention discloses production of nickel aminosulfonate or cobalt aminosulfonate through an ion exchange method; the production of nickel aminosulfonate or cobalt aminosulfonate through the ion exchange method relates to ion exchange resin, an ion exchange column, amino sulfonic acid, a pure alkali solution and deionized water. The production comprises the production steps of ion exchange resin transformation, adsorption, elution and the like. The implementation scheme having the advantages of simple process route, low cost and continuous production is provided for production of nickel aminosulfonate or cobalt aminosulfonate.

The invention relates to a method and a device for preparing fluorine sulfimide acid and belongs to the field of fine chemical industries. The method comprises the steps as follows: a crude product of fluorine sulfimide salt reacts with sulfuric acid with the mass concentration in a range of 98-105% with the presence of silicon dioxide at the reaction temperature in a range of 85-150 DEG C for 1-4 h, nitrogen is fed before the reaction, and a crude product of the fluorine sulfimide acid is prepared through atmospheric distillation after the reaction; and then the crude product of the fluorine sulfimide acid is led into a rectifying tower, and the fluorine sulfimide acid is obtained through refinement. According to the method, the content of impurities in the fluorine sulfimide acid is effectively reduced, the operability of the production process is improved, and the purity of the fluorine sulfimide acid is increased.

Provided is a preparation method for lithium bis-(fluoro-sulfonyl) imide, comprising the following steps: (1) carrying out fluorination: synthesizing an intermediate bis-(fluoro-sulfonyl) imide by using bis-(chloro-sulfonyl) imide and hydrogen fluoride in presence of a catalyst; and (2) enabling the obtained bis-(fluoro-sulfonyl) imide and alkaline lithium to react, and carrying out solid-liquid separation after the reaction to obtain the lithium bis-(fluoro-sulfonyl) imide. The preparation method is low in cost, fewer in by-products and simple in aftertreatment, and is capable of guaranteeing the quality and purity of products, thereby being suitable for industrial production.