28 results about "Fluoromethane" patented technology

Disclosed are novel electrolytes, and techniques for making and devices using such electrolytes, which are based on compressed gas solvents. Unlike conventional electrolytes, disclosed electrolytes are based on “compressed gas solvents” mixed with various salts, referred to as “compressed gas electrolytes.” Various embodiments of a compressed gas solvent include a material that is in a gas phase and has a vapor pressure above an atmospheric pressure at room temperature. The disclosed compressed gas electrolytes can have wide electrochemical potential windows, high conductivity, low temperature capability and / or high pressure solvent properties. Examples of a class of compressed gases that can be used as solvent for electrolytes include hydrofluorocarbons, in particular fluoromethane, difluoromethane, tetrafluoroethane, and pentafluoroethane. Also disclosed are battery and supercapacitor structures that use compressed gas solvent-based electrolytes and techniques for constructing such energy storage devices. Techniques for electroplating difficult-to-deposit materials using compressed gas electrolytes as an electroplating bath are also disclosed.

The present application belongs to the technical field of pesticides, and particularly relates to an insecticidal composition containing an isoxazoline-substituted benzamide compound and application thereof. The insecticidal composition contains active ingredient A and active ingredient B, wherein the active ingredient A is oxadiazylfluazaim or the active ingredient B is one or more selected from the following compounds: fluoromethane sulfide, pyridaben and fluoromethane bisether. The composition has reasonable components, good insecticidal effect, low pesticide cost, and the characteristics of reducing the application amount, being safe to crops, reducing the amount of pesticide residues, etc.

This invention provides a method for preparing pentafluoroethyl trifluoromethyl ether. The method includes the following steps: reacting fluorooxytrifluoromethane and tetrafluoroethylene in a solvent under light and in the presence of an inert gas. This method has advantages such as high yield and simple synthesis process, and has certain industrial application value.

This disclosure provides a method for efficiently purifying difluoromethane (HFC-32).Specifically, the present disclosure provides a method for producing a purified HFC-32, the method including:an extractive distillation step of contacting a composition containing difluoromethane (HFC-32) and a component X with a solvent A to obtain a composition containing a reduced component X from the composition,wherein the component X is at least one selected from the group consisting of pentafluoroethane (HFC-125), 1, 1, 1-trifluoroethane (HFC-143a), and dichlorodifluoromethane (CFC-12), andwherein the solvent A is at least one of an amine and a fluorinated ether.

The application relates to a preparation method of a substituted sulfonic acid compound, in particular to a preparation method of 2-fluoro-5-methanesulfonylbenzoic acid. A compound of formula I is prepared through sulfonation reaction of 2-fluoro-5-halobenzoic acid and derivatives thereof with a sulfonation reagent and further through alkylation reaction. A reaction formula is as follows: the preparation method has the advantages of high yield, low raw material cost, short reaction period, mild reaction condition, easy operation, less three wastes and the like, and can realize industrialized production.

A composition comprising: (i) 1,1-difluoroethene (vinylidene fluoride, R-1132a); (ii) carbon dioxide (CO2, R-744); (iii) pentafluoroethane (R-125); and (iv) one or more of trifluoromethane (R-23) and hexafluoroethane (R-116).

A composition comprising: (i) 1,1-difluoroethene (vinylidene fluoride, R-1132a); (ii) carbon dioxide (CO2, R-744); (iii) pentafluoroethane (R-125); and (iv) one or more of trifluoromethane (R-23) and hexafluoroethane (R-116).

A method and system for purifying methyl fluoride (MeF) by removing dimethyl ether (Me2O) using a lithium salt sorbent, such as LiFSI or LiTFSI, are disclosed. Contaminated MeF is contacted with the sorbent, which preferentially adsorbs Me2O due to strong Lewis acid-base interactions, yielding purified MeF. The process may involve flowing through a sorbent bed, cryogenic collection, temperature differentials, or pumping, with optional multiple cycles for enhanced purity. This approach provides superior efficiency and purity compared to conventional methods, with experimental reductions up to 80% in Me2O content. Alternative salts and porous supports are also provided.

An apparatus includes a body configured to support a substrate, a first coating, conformal on a surface of the body, that is corrosion resistant to at least one of: boron trichloride, nitrogen trifluoride, hafnium tetrachloride, aluminum trichloride, oxygen gas, chlorine gas, fluorine gas, chlorine trifluoride, hydrogen fluoride, hydrogen gas, ammonia, tungsten hexafluoride, tetrafluoromethane, titanium tetrachloride, molybdenum pentachloride, ozone, tetrafluorosilane, or hexafluoroethane, and a second coating, on the first coating, having a hardness that greater than or equal to about 8 gigapascals.

The invention provides a preparation method of fluoromethylamine naphthyl propanol. Specifically, the method comprises the following steps: reacting a compound V with a compound VI in an inert solvent in the presence of alkali to obtain a compound VII; and then optionally carrying out salt forming reaction on the fluoromethylamine naphthyl propanol and acid to obtain the salt of the fluoromethylamine naphthyl propanol. The invention provides a new synthetic route of fluoromethylamine naphthyl propanol, and the method can simplify the operation process, avoid the use of reagents with safety risks, reduce the generation of impurities, reduce the post-treatment difficulty and significantly improve the yield, and is very suitable for industrial production.

The invention relates to the technical field of fluorine chemical industry production, in particular to a preparation method of difluoromethane, which comprises the following steps: S1, continuously introducing hydrogen fluoride, liquid chlorine and vaporized dichloromethane into a reaction kettle filled with a catalyst for catalytic reaction to obtain a first material containing difluoromethane, hydrogen chloride and an intermediate product; s2, separating hydrogen chloride from the first material to obtain a second material; s3, sequentially dehydrating the second material, removing light components, rectifying to obtain a difluoromethane product from the tower top, and condensing and collecting; and S4, refining the tower kettle material rectified in the step S3 to obtain fluorochloromethane, and returning to the step S1 to participate in the reaction. According to the invention, the liquid chlorine is used as a chlorine source, the liquid chlorine is vaporized to absorb reaction heat, and microscale turbulence and volume expansion effect are generated during vaporization, so that generated chlorine molecules are uniformly dispersed in the reaction liquid, the problem of non-uniform chlorine concentration distribution caused by traditional gas phase bubbling is avoided, and the overall activity of the catalyst is maintained in an optimal and stable oxidation reduction state.

According to the present invention, there is provided a composition carbon dioxide (CO2, R-744), difluoromethane (R-32) and 1,1-difluoroethylene (R-1132a).

The invention relates to a monofluoromethane purification and adsorption material, a preparation method and application, the preparation method comprises the following steps: dipping carrier powder in a transition metal salt solution, and drying to obtain a solid material; and roasting the obtained solid material at 250-350 DEG C in a nitrogen atmosphere to obtain the monofluoromethane purification and adsorption material. The monofluoromethane purification and adsorption material obtained by the invention can effectively improve the removal effect of fluorocarbon impurities and hydrocarbon impurities in the gas phase method monofluoromethane feed gas, and greatly reduces the difficulty of subsequent purification.

A composition comprising trifluoroiodomethane (CF3I) and 1,1-difluoroethylene (R-1132a) is described. The composition can also comprise additional compounds, such as at least one non-flammable compound selected from the group consisting of carbon dioxide (CO2; R-744), tetrafluoromethane (R-14), trifluoromethane (R-23) and perfluoroethane (R-116) or at least one additional compound of lower volatility than 1,1-difluoroethylene selected from the group consisting of 1,1,2-trifluoroethylene (R-1123), difluoromethane (R-32), propane (R-290), propylene (R-1270), fluoroethane (R-161), pentafluoroethane (R-125), 1,1,1,2-tetrafluoroethane (R-134a), 2,3,3,3-tetrafluopropene (R-1234yf), isobutane (R-600a), n-butane (R-600), trans-1,3,3,3-tetrafluopropene (R-1234ze(E)), 3,3,3-trifluoropropene (R-1243zf), 1,2,3,3,3-pentafluoropropene (R-1225ye), 1, 1,1,2,3,3,3-heptafluoropropane (R-227ea), 1,1-difluoroethane (R-152a), cis-1,3,3,3-tetrafluopropene (R-1234ze(Z)), 1-chloro-3,3,3-trifluoropropene (R-1233zd(E / Z)) and 1,1,1,4,4,4-hexafluoro-2-butene (R-1336mzz(E / Z)). The compositions have utility as refrigerants in vapour compression heat transfer systems.

The present application relates to a preparation method of monofluoromethane, the preparation method comprises the following steps: (1) mixing halogenated methane, iodide and organic solvent, and reacting to obtain an organic solution of methyl iodide; the halogenated methane comprises liquid monochloromethane and / or monobromomethane; (2) mixing fluoride, a promoter and the organic solution of methyl iodide obtained in step (1), and reacting to generate gaseous product monofluoromethane. The preparation method provided by the present application does not require the use of a catalyst, and the organic solvent can be reused, thereby reducing production costs; the preparation method provided by the present application is simple to operate, the product quality is stable, the purity is high, and is suitable for continuous production.

Disclosed are novel electrolytes, and techniques for making and devices using such electrolytes, which are based on compressed gas solvents. Unlike conventional electrolytes, disclosed electrolytes are based on “compressed gas solvents” mixed with various salts, referred to as “compressed gas electrolytes.” Various embodiments of a compressed gas solvent includes a material that is in a gas phase and has a vapor pressure above an atmospheric pressure at a room temperature. The disclosed compressed gas electrolytes can have wide electrochemical potential windows, high conductivity, low temperature capability and / or high pressure solvent properties. Examples of a class of compressed gases that can be used as solvent for electrolytes include hydrofluorocarbons, in particular fluoromethane, difluoromethane, tetrafluoroethane, pentafluoroethane,. Also disclosed are battery and supercapacitor structures that use compressed gas solvent-based electrolytes, techniques for constructing such energy storage devices. Techniques for electroplating difficult-to-deposit materials using compressed gas electrolytes as an electroplating bath are also disclosed.

Herein discussed is an electrochemical device. The device includes an anode, a cathode, and an electrolyte. The anode includes silicon, silicon oxide, silicon carbide or silicon / carbon composites; and wherein the electrolyte comprises a solvent comprising N, N-dimethyltrifluoromethane-sulfonamide or Dimethylsulfamoyl fluoride and a salt substantially dissolved in the solvent. The salt is selected from the group consisting of lithium bis (fluorosulfonyl) imide, sodium bis (fluorosulfonyl) imide, lithium hexafluorophosphate, sodium hexafluorophosphate, and combinations thereof. Methods of making and using such a device are also disclosed.

Provided are methods of synthesizing fluoromethane from chloromethane and at least a 150% stoichiometric excess of hydrogen fluoride, and fluoromethane product compositions. The methods include contacting the reactants in the gas phase in the presence of substantially no chromium but optionally in the presence of solid support particles in a reactor; controlling conditions in the reactor to promote a reaction conversion of the reactants of 3-30% to form a reactor output stream; separating unreacted chloromethane and hydrogen fluoride from the reactor output stream to form a recycle stream, wherein at least a portion of the remaining components of the reactor output stream form a crude intermediate stream comprising fluoromethane product and hydrogen chloride byproduct; recycling at least a portion of the recycle stream back to the reactor; removing the byproduct hydrogen chloride from the crude intermediate stream to form a fluoromethane product stream; and optionally purifying the fluoromethane product stream.

Herein disclosed is an electrochemical device. The device includes an anode, a cathode, and an electrolyte. The cathode includes lithium manganese iron phosphate (LiMnxFe1-xPO4, LMFP) or sodium manganese iron phosphate (NaMnxFe1-xPO4, NMFP), or potassium manganese iron phosphate (KMnxFe1-xPO4, KMFP). The electrolyte includes a solvent comprising N, N-dimethyltrifluoromethane-sulfonamide (DMTMSA) or Dimethylsulfamoyl fluoride (DMSF). Methods of making and using such a device are also disclosed.

The invention provides a composition comprising (a) carbon dioxide (R-744, CO2); (b) difluoromethane (R-32); and (c) a third component selected from 1,1,1,2-tetrafluoroethane (R-134a), trans-1,3,3,3-tetrafluoropropene (R-1234ze(E)), 2,3,3,3-tetrafluoropropene (R-1234yf), 1,1,1,2,3,3,3-heptafluoropropane (R-227ea) and mixtures thereof.

The invention provides a filled container and a storage method thereof, wherein disproportionation reaction of HFO such as trifluoroethylene can be inhibited, and the filled container can be safely transported and stored. This filled container comprises a composition containing a first component and a second component, and a container filled with the composition, the first component being at least one selected from the group consisting of trifluoroethylene, 1, 2-difluoroethylene, and 1, 1-difluoroethylene, and the second component being at least one selected from the group consisting of 2, 3, 3, 3-tetrafluoropropene, difluoromethane, fluoromethane, 1, 1-difluoroethane, fluoroethane, 1, 1, 1, 3, 3-tetrafluoropropene, difluoromethane, fluoromethane, 1, 1-difluoroethane, fluoroethane, and 1, 1, 1, 3, 3-tetrafluoropropene. The container is formed from a material having a tensile strength of 400 N / mm2 or more and a yield ratio of 60% or more, and the first component is 62.6% by mass or less relative to the total amount of the first component and the second component, and the container is formed from a material having a tensile strength of 400 N / mm2 or more and a yield ratio of 60% or more.

The invention belongs to the field of chemical engineering, and particularly relates to a method for preparing trifluoromethane by refining chlorofluorinated methane. The method comprises the following steps: 1) carrying out contact catalytic dechlorination on crude product gas through an iron-copper catalytic system to obtain mixed gas; 2) drying the mixed gas, and performing contact catalytic reaction through a TO-MOH composite catalyst to obtain a trichloromethane product; wherein the crude product gas in the step 1) contains any one or more of CClF3, CCl2F2, CCl3F, CHClF2, CHCl2F and CH2ClF, and the crude product gas is preheated to 105 to 120 DEG C in a controlled manner. Through cooperation of two specific catalytic processes, dechlorination and fluorination can be sequentially and efficiently achieved, directional conversion from chlorofluorinated methane to trifluoromethane is effectively achieved, and by-products generated in preparation of tetrafluoromethane through chlorine catalysis are quite effectively converted and utilized.

The invention discloses a method for preparing 1, 2-difluoroethylene from dichloromethane, which comprises the following steps: carrying out fluoridation reaction on dichloromethane and hydrogen fluoride under the action of a catalyst I to obtain a first mixture, rectifying to obtain a second mixture containing monochlorofluoromethane (HCFC-31, R31), converting the monochlorofluoromethane from R31 to R1132 under the action of a cracking catalyst, and separating the first mixture from the second mixture to obtain the 1, 2-difluoroethylene. The preparation method is high in yield, the selectivity of the fluorination reaction to R31 is high, and the selectivity of the cracking reaction to the product R1132 is high. Meanwhile, the method also can realize co-production of difluoromethane, so that fluorine elements and carbon elements in the raw materials are efficiently utilized in a stepped manner, the atom economy is remarkably improved, and co-production from the cheap raw material dichloromethane to a high-added-value refrigerant (R32) and a fluorine-containing monomer (R1132) is realized.

The present invention provides a method for efficiently purifying difluoromethane (HFC-32). Specifically disclosed is a method for producing purified HFC-32, which comprises: an extraction distillation step wherein a composition containing difluoromethane (HFC-32) and a component X, which is selected from the group consisting of pentafluoroethane (HFC-125), 1, 1, 1, 3, 3, 3-pentafluoroethane (HFC-125), 1, 1, 3, 3, 3-pentafluoroethane (HFC-125), 1, 1, 3, 3, 3-pentafluoroethane (HFC-125), 1, 1, 3, 3, 3-pentafluoroethane (HFC-125), 1, 1, 3, 3, 3-pentafluoroethane (HFC-125) the solvent A is at least one of 1, 1, 1-trifluoroethane (HFC-143a) and dichlorodifluoromethane (CFC-12), and the solvent A is at least one of amine and fluorinated ether.

The invention provides a composition comprising carbon dioxide (CO2, R-744), difluoromethane (R-32) and trifluoroiodomethane (CF3I) and the use of such a composition as a working fluid in a heat transfer system, such as a refrigeration, heat pump or air-conditioning system.

The invention provides a mixed refrigerant and an air conditioning system, the mixed refrigerant is composed of a first component, a second component and a third component, the first component is 3, 3, 3-trifluoropropyne, the second component is fluoromethane, and the third component is one or more of fluoroethane, propylene and dimethyl ether. According to the mixed refrigerant, on the premise that safety and system performance are guaranteed, emission of greenhouse gas can be reduced, the problem that the GWP of other refrigerants is too high is effectively solved, meanwhile, the problem that the thermal performance of other refrigerants is poor is solved, the relative volume refrigerating capacity is improved while the GWP is reduced, and the service life of the refrigerant is prolonged. And the refrigerating / heating performance is improved (namely, the thermal performance is improved).

The invention discloses a synthetic method of fluoromethane, which comprises the following steps: (1) taking trifluoromethanesulfonic anhydride and methanol as raw materials, and synthesizing methyl trifluoromethanesulfonate through esterification reaction; and (2) taking methyl trifluoromethanesulfonate as a methyl donor, and carrying out nucleophilic substitution reaction on potassium fluoride under the assistance of phase transfer agents such as crown ether / PEG (Polyethylene Glycol) to generate fluoromethane. The reaction condition is mild, esterification is completed at normal temperature and normal pressure, and the high toxicity risk of a traditional dimethyl sulfate method is avoided. The conversion rate is high, the activity of trifluoromethanesulfonic anhydride is high, excessive methanol ensures complete reaction, and the esterification efficiency is not less than 95%. The invention provides a novel process for synthesizing fluoromethane by taking methyl trifluoromethanesulfonate as a methyl donor and potassium fluoride as a fluorine source, and the novel process has the technical significance of low cost, low energy consumption and controllable equipment, and is suitable for commercial amplification.

The invention discloses an electronic-grade fluoromethane preparation reaction kettle pipeline joint, and relates to the technical field of fluoromethane preparation, the electronic-grade fluoromethane preparation reaction kettle pipeline joint comprises a first connecting pipe, the first connecting pipe is connected with a gas outlet of a first distillation reaction kettle, and one end of the first connecting pipe is rotatably connected with a rotating piece; through holes matched with the input pipes in size and number are formed in the rotating part; the diameter of the end, away from the positioning block, of the diaphragm is reduced, the original cylindrical diaphragm is changed into a circular truncated cone shape, the diameter of the end, close to the rotating piece, of the diaphragm is small, along with generation of mixed gas in the first distillation reaction kettle, according to the Venturi effect, gas flows in a circular truncated cone-shaped channel in the later period of reaction, and the gas flows in the narrowest position of the channel; the dynamic pressure in the channel reaches the maximum value, the static pressure reaches the minimum value, the speed of the gas in the channel is increased due to the reduction of the cross sectional area of the channel, and the gas flow passing through the interior of the channel is subjected to the channel reduction process at the same time, so that the pressure is also reduced.