56 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.

Mixtures configured to etch a thin film of an integrated circuit material are disclosed. The mixtures may include a first compound comprising one or more of: A, B, and C; and a second compound comprising one or more of: oxygen, argon, helium, nitrogen, octafluorocyclobutane (C4F8), hexafluorobutadiene (C4F6), carbonyl fluoride (COF2), difluoromethane (CH2F2), trifluoromethane (CHF3), carbon tetrafluoride (CF4), methyl fluoride (CH3F), octafluorocyclopentene (C5F8), 2,3,3,3-tetrafluoropro-l-ene (C3H2F4), 2,3,3,3-tetrafluoropro-l-ene (C3H2F4), hexafluoropropene (C3F6), hexafluorocyclopropane (C3F6), or 1,1,3,3,3-pentafhioropropene (C3HF5).

The utility model discloses a production device of monochloromethane. The production device comprises a preheating gas holder for gasifying methanol, a mixed gas holder for mixing methanol gas and monochlorodifluoromethane tail gas, a chlorination reactor, a cooler, a water scrubber, a compression condensing tower and a rectifying tower which are connected in sequence, the lower part of the cooler is connected with a water and methanol collector, the lower part of the water scrubber is connected with a hydrochloric acid collector, the top of the compression condensing tower is connected with a trifluoromethane collector, and the top of the rectifying tower is connected with a finished product collector. According to the device disclosed by the utility model, hydrogen chloride in the monochlorodifluoromethane tail gas is utilized, and trifluoromethane is effectively separated. The purity of the trifluoromethane separated by the device disclosed by the utility model is more than 99.99%, and the trifluoromethane becomes a chemical product which can be further utilized; and the purity of the prepared methane chloride finished product also reaches 99.99% or above. According to the utility model, the pressure for treating trifluoromethane and fluorine-containing hydrogen chloride in an environment-friendly manner is reduced, the production cost is reduced, and the effects of sustainable development and co-production are achieved.

The invention discloses an environment-friendly refrigeration composition for compression refrigeration, the ODP value of the environment-friendly refrigeration composition is 0, the GWP is less than 150, and the refrigeration composition comprises hexafluoropropylene serving as a first component and accounting for 30-50% of the total mass of the refrigeration composition; the trifluoroethylene is used as a second component and accounts for 30-50% of the total mass of the refrigeration composition; the third component is selected from at least one of cyclopropane, difluoromethane or trifluoroacetyl fluoride, and the mass of the third component accounts for 10-30% of the total mass of the refrigeration composition. The refrigeration composition can replace R410A to be used for a household air conditioner or a commercial air conditioner system, parts of the air conditioner system do not need to be replaced, the environmental performance is far better than that of the R410A, and the cycle performance is equivalent to or slightly better than that of the R410A.

To provide a method for efficiently purifying difluoromethane (HFC-32).SOLUTION: The present disclosure provides a method for producing purified difluoromethane (HFC-32), the method including an extractive distillation step of bringing a composition containing HFC-32 and a component X into contact with a solvent A to obtain a composition where an amount of the component X is reduced from the composition. 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), and the solvent A is at least one of an amine and a fluorinated ether.SELECTED DRAWING: None

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.

The present invention discloses a method for improving the activity and stability of a catalyst in the fluorine-chlorine exchange reaction of HFC-23. In the fluorine-chlorine exchange reaction, trifluoromethane and trichloromethane are used as raw materials to prepare difluorochloromethane (HCFC-22) and chlorodifluoromethane (HCFC-21). The catalyst is an aluminum-based catalyst. During the fluorine-chlorine exchange reaction, a fluorochloroaluminum adsorption active site of trifluoromethane is formed on the catalyst, and the fluorochloroaluminum adsorption active site of trifluoromethane accounts for 5-15% of the aluminum species on the catalyst surface. The present invention has an appropriate proportion of the fluorochloroaluminum adsorption active site of trifluoromethane, which can improve the catalytic activity of the catalyst, and further enhance the catalytic activity and catalytic stability of the catalyst by increasing the number of trifluoromethane adsorption active sites.

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.

Test chamber (10) for conditioning air, comprising a temperature-insulated test chamber (12) that can be closed off from the environment for receiving test material and a temperature control device (11) for temperature control of the test chamber, wherein a temperature in a temperature range of -80 °C to +180 °C can be established within the test chamber by means of the temperature control device, wherein the temperature control device comprises a cooling device (16) with a cooling circuit (17) with a refrigerant, a heat exchanger (18) arranged in the test chamber, a compressor (19), a condenser (20) and an expansion element (21), wherein the temperature control device (11) comprises a heating device (23) with a heater and a further heat exchanger (22), characterized in that the refrigerant is a nearly azeotropic refrigerant mixture consisting of a mass fraction of carbon dioxide and a mass fraction of at least one of the components ethene, hexafluoroethane, monofluoroethane, 1.1 Difluoroethene, fluoromethane and / or propane and / or xenon, wherein the refrigerant has a relative CO2 equivalent, based on 20 years, of < 2500, wherein a first bypass (43) with at least one further throttling element (44) is formed in the cooling circuit (17), wherein the first bypass (43) bridges the compressor (19) downstream of the compressor (19) and upstream of the condenser (20) in the direction of flow, wherein a pressure difference between a high-pressure side (26) and a low-pressure side (27) of the cooling circuit (17) can be equalized via the further throttling element (44).

This invention provides a method for producing a reaction gas containing R-1132(E) with a higher selectivity than existing methods. Specifically, this invention provides a method for producing a reaction gas containing (E)-1,2-difluoroethylene (R-1132(E)), (1) comprising a step of feeding a feed gas containing at least one fluoromethane selected from dichlorofluoromethane (R-22), difluoromethane (R-32), and fluoromethane (R-41) into a reaction including thermal decomposition to obtain the reaction gas, and (2) wherein the water vapor content in the feed gas is 1% by volume or less.

Provided are: a filling container with which a disproportionation reaction of HFO such as trifluoroethylene is suppressed and transportation and storage can be safely carried out; and a storage method therefor. A filling container according to the present invention comprises a composition containing a first component and a second component and a container filled with the composition, wherein: the first component is at least one selected from the group consisting of trifluoroethylene, 1,2-difluoroethylene, and 1,1-difluoroethylene; the second component is 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-pentafluorobutane, dimethyl ether, carbon dioxide, propane, butane, argon, helium, and nitrogen; the amount of the first component is at most 62.6 mass% with respect to the total amount of the first component and the second component; and the container is made of a material having a tensile strength of at least 400 N / mm2 and a yield ratio of at least 60%.

A delivery pipe I (4) of a liquid chlorine steel cylinder (1) and a delivery pipe II (5) of a dichloromethane storage tank (2) form one path and then are communicated with a dichloromethane multi-stage pump (8) through a mixer (6), and a hydrogen fluoride storage tank (3) is communicated with a shield pump (10). The dichloromethane multi-stage pump (8) and the shield pump (10) are respectively communicated with the fluorination reactor (12) through a mixed feeding pipeline I (11) and a mixed feeding pipeline II (13), and the fluorination reactor (12) is communicated with the difluoromethane finished product storage tank (15) through a finished product delivery pump (14). According to the preparation method disclosed by the invention, the difluoromethane and the hydrogen fluoride react in proportion under the action of the antimony pentachloride to prepare the difluoromethane, and the liquid chlorine is introduced through the liquid chlorine steel cylinder to be uniformly mixed with the difluoromethane. The service life of the catalyst is prolonged, corrosion to reaction equipment is reduced, and the reaction is fully carried out.

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 present invention relates to the technical field of resource utilization of trifluoromethane. Provided in the present invention are a method for producing tetrafluoromethane by taking trifluoromethane as a raw material, and a cracking purification device. In the present invention, trifluoromethane is introduced into a thermal plasma reactor, and same is subjected to a cracking reaction at 1500-5000 K to obtain tetrafluoromethane. Compared with conventional pyrolysis by means of a tubular furnace or high-temperature pyrolysis by means of a muffle furnace, the thermal plasma reactor used in the present invention can rely on the synergistic effect of high-temperature and high-activity electrons and heavy particles, such that the electron excitation effect is obvious. The efficient cleavage and directional recombination of chemical bonds in trifluoromethane molecules can be achieved under the condition of not using a catalyst and fluorine gas, the conversion rate of trifluoromethane is high, the selectivity of tetrafluoromethane is high, and the energy consumption is low. In addition, the method provided in the present invention has a short reaction time, a large treatment capacity, and is safe and controllable, the composition of the cracking reaction product is simple, and the method makes it easy to carry out separation and purification, has a low cost and low energy consumption, and is suitable for continuous large-scale industrial production.

A method for synthesizing fluoromethane from chloromethane and at least a 150% stoichiometric excess of hydrogen fluoride is provided, as is a fluoromethane product composition. The method includes contacting the reactants in gas phase in a reactor in the substantial absence of chromium but optionally in the presence of solid support particles; controlling conditions in the reactor to foster 3-30% reaction conversion of the reactants to form a reactor output stream; separating unreacted chloromethane and hydrogen fluoride out from the reactor output stream to form a recycle stream, with at least a portion of the remaining components of the reactor output stream forming a crude intermediate stream comprising fluoromethane product and hydrogen chloride by-product; recycling at least a portion of the recycle stream back to the reactor; removing by-product hydrogen chloride from the crude intermediate stream to form a fluoromethane product stream; and optionally purifying the fluoromethane product stream.

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.

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.

The invention provides a preparation method of polyoxovanadate with a stable hydrogen bond network as a positive electrode of an aqueous zinc ion battery. The preparation method comprises the following steps: (1) synthesizing a polyoxovanadate precursor (NH4) 7 [MnV13O38]. 4H2O containing crystal water through a conventional aqueous solution method; (2) calcining to remove crystal water to obtain (NH4) 7 [MnV13O38] as a zinc ion storage active material; (3) mixing the active material with a conductive agent (ketjen black) and a binder (polyvinylidene fluoride) according to a mass ratio of 7: 2: 1, coating a current collector with the mixture, and drying at 60 DEG C for 12 hours to obtain a positive plate; and (4) assembling the CR-2016 type button cell by taking a zinc sheet as a negative electrode, glass fibers as a diaphragm and a 3 mol / L zinc trifluoromethanesulfonate solution as an electrolyte. The method is simple to operate and low in cost, and a hydrogen bond network in the material promotes rapid transmission of zinc ions and maintains structural stability. Under 1.0 A g <-1 >, the reversible specific capacity of the electrode material after being activated reaches 293.8 mAh g <-1 >, the capacity retention ratio after 1300 cycles is 76%, the coulombic efficiency is about 100%, and the electrode material is suitable for a high-power scene.

A working fluid for a heat cycle, contains: trifluoroethylene; and a first component consisting of at least one of substance selected from carbon dioxide, fluoromethane, trifluoroiodomethane, methane, ethane, propane, helium, neon, argon, krypton, xenon, nitrogen and ammonia.

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 invention discloses a preparation method of a pesticide fluopyram, which comprises the following steps: mixing a metal palladium catalyst, a ligand, 2-[3-chloro-5-(trifluoromethane) pyridine-2-methylethylamine hydrochloride, o-halogen trifluorotoluene, alkali and an organic solvent under protective gas, increasing the pressure in a kettle, heating and stirring, and carrying out post-treatment to obtain the pesticide fluopyram. The target product is directly and efficiently synthesized through one-step reaction, and the yield is good. Compared with the existing synthesis route, the route has the advantages that the raw materials are easy to obtain, the route is shortened, the reaction conditions are not harsh, and a foundation is laid for further pilot scale production.

The invention discloses a method for regulating and controlling byproducts in a trifluoromethane fluorine-chlorine exchange reaction process, the fluorine-chlorine exchange reaction is to prepare monochlorodifluoromethane and dichloromonofluoromethane by taking trifluoromethane and trichloromethane as raw materials under the action of a catalyst, and the catalyst comprises an aluminum-based catalyst and a metal oxide or fluoride. The aluminum-based catalyst is selected from at least one or a mixture of more than two of Al2O3, AlF3, Al2 (SO4) 3 and AlPO4, and the metal catalyst is selected from at least one of metal oxides or fluorides of Cr, Sc, Ti or V. The adsorption force of the product on the surface of the catalyst is regulated and controlled through metal doping, and the product is quickly desorbed and does not further participate in the reaction, so that the generation of byproducts in the fluorine-chlorine exchange reaction of the HFC-23 can be effectively inhibited.