55 results about "Difluoromethane" patented technology

The present invention relates to an environmentally friendly refrigerant blend that utilizes a refrigerant comprising E-1, 3, 3, 3-tetrafluoropropene (HFO-1234zeE), difluoromethane (HFC-32), and 1, 1-difluoroethane (HFC-152a), and more particularly, to a refrigerant blend that uses a refrigerant comprising E-1, 3, 3, 3-tetrafluoropropene (HFO-1234zeE), difluoromethane (HFC-32), and 1, the blend has low GWP, low toxicity and low flammability as well as improved efficiency for thermal management of the passenger compartment (transferring heat from a portion of the vehicle to another) of a hybrid, mild, plug-in hybrid, or all-electric vehicle to provide air conditioning (A / C) or heating to the passenger compartment.

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.

According to the present invention there is provided a composition comprising: (a) 1, 1-difluoroethylene (R-1132a); (b) difluoromethane (R-32); (c) a trans-1, 2-difluoroethylene (R < 11 > 32 (E)); and (d) one or more of trans-1, 3, 3, 3-tetrafluoropropene (R-1234ze (E)), 1, 1-difluoroethane (R-152a), and 2, 3, 3, 3-tetrafluoropropene (R-1234yf), and a process for producing the same.

To provide a novel low-GWP mixed refrigerant. [Solution] A composition containing a refrigerant, wherein the refrigerant comprises trans-1,2-difluoroethylene (HFO-1132(E)), difluoromethane (R32), 2,3,3,3-tetrafluoro-1-propene (R1234yf) and 1,1-difluoroethylene (HFO-1132a), and the mass % based on the sum of HFO-1132(E), R32, R1234yf and HFO-1132a is given as x, y and z, and a (where 0

The application discloses a pyrrole polymer electrolyte film in an energy storage lithium battery and a preparation method and application thereof, and belongs to the polymer electrolyte field. The method comprises the following steps: reacting 1-methyl pyrrolidine and bromine n-butane to prepare 1-methyl-1-butyl pyrrolidine bromide; preparing 1-methyl-1-butyl pyrrolidine difluoromethane sulfonimide salt ionic liquid by mixing the 1-methyl-1-butyl pyrrolidine bromide and lithium difluoromethane sulfonimide; mixing 1-methyl-1-butyl pyrrolidine difluoromethane sulfonimide salt ionic liquid, polyethylene glycol methyl ether methacrylate, acrylonitrile, lithium bistrifluoromethanesulfonimide, divinylbenzene and benzoin ethyl ether uniformly, coating and curing to obtain a pyrrole ionic liquid polymer electrolyte film. The application combines the molecular configuration of the pyrrolidine-based ionic liquid and the topological structure of the polymer network, realizes triple optimization of ion transmission-mechanical strength-interface stability.

The present invention provides a refrigerant composition that can operate efficiently in automotive heat pump systems. [Solution] A refrigerant composition comprising 1,1-difluoroethylene (R-1132a), difluoromethane (R-32), 1,1-difluoroethane (R-152a), and at least one tetrafluoropropene refrigerant compound selected from the group consisting of 2,3,3,3-tetrafluoropropene (R-1234yf) and 1,3,3,3-tetrafluoropropene (R-1234ze(E)).

An object is to provide a novel low-GWP mixed refrigerant. Solution means is a composition comprising a refrigerant, wherein the refrigerant comprises trans-1,2-difluoroethylene (HFO-1132(E)) and difluoromethane (R32) in a total amount of 99.5 mass % or more based on the entire refrigerant, and comprises HFO-1132(E) in an amount of 63.0 mass % to 68.3 mass % based on the total amount of HFO-1132(E) and R32; comprises HFO-1132(E) in an amount of 70.5 mass % to 76.5 mass % based on the total amount of HFO-1132(E) and R32; or comprises HFO-1132(E) in an amount of 81.6 mass % to 83.7 mass % based on the total amount of HFO-1132(E) and R32.

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 invention belongs to the technical field of refrigerants, and particularly relates to an R134a low-GWP substitute refrigerant as well as a preparation method and application of the R134a low-GWP substitute refrigerant. The alternative refrigerant is a mixture and is prepared from the following components in parts by weight: 45 to 55 parts of difluoromethane (R32), 8 to 12 parts of 1, 1-difluoroethane (R152a) and 36 to 44 parts of hexafluoropropylene (R1216). The refrigerant disclosed by the invention has the characteristics of good environmental protection property, high refrigerating capacity per unit volume, small temperature slippage and excellent thermodynamic property, and is particularly suitable for direct replacement of a refrigerating system, and the existing equipment does not need to be transformed.

The utility model provides an energy-saving condensing device for monochlorodifluoromethane, which belongs to the field of chemical engineering and comprises racks, a first condenser and a second condenser are fixedly mounted on the racks and communicated through a connecting pipe, water storage tanks are fixedly connected onto the two racks, and the water storage tanks are communicated with the first condenser and the second condenser. The two water storage tanks are installed on the first condenser and the second condenser correspondingly, filtering assemblies are installed on the two water storage tanks correspondingly, and a stirring assembly is installed between the two water storage tanks jointly. After condensed water is recycled to the water storage tank, the condensed water can be filtered through the filter screen, particles, microorganisms or chemical precipitates possibly carried in the condensed water are removed, a condenser pipeline is prevented from being blocked, the heat exchange efficiency is ensured, and equipment failures are avoided; a user can conveniently mount and dismount the mounting rack, and the portability of the device is improved.

A method of manufacturing a semiconductor device may include sequentially forming a word line filling a word line trench of a substrate and a buried insulation layer on the word line, performing a first etching process of forming a logic active region contact hole extending to an inner portion of a logic active region of the substrate and a word line contact hole extending to an inner portion of the buried insulation layer, and performing a second etching process so that the word line contact hole extends to an inner portion of the word line. The first etching process may be performed using a first etching gas, which may include difluoromethane (CH2F2) and octafluorobutyne (C4F8) and where a ratio of difluoromethane to octafluorobutyne may be at least 1:1.5. The first etching gas may react with the logic active region to form a barrier layer.

The invention belongs to the technical field of refrigerants, and particularly relates to a near-azeotropic R410A low-GWP substitute refrigerant as well as a preparation method and application of the near-azeotropic R410A low-GWP substitute refrigerant. The alternative refrigerant is a near-azeotropic mixture and is prepared from the following components in parts by weight: 60 to 70 parts of difluoromethane (R32), 25 to 35 parts of pentafluoroethane (R125) and 3 to 7 parts of hexafluoropropylene (R1216). The refrigerant disclosed by the invention has the characteristics of good environmental protection property, high refrigerating capacity per unit volume, small temperature slippage and excellent thermodynamic property, and is particularly suitable for direct replacement of a refrigerating system, and the existing equipment does not need to be transformed.

The application discloses a kind of alkali washing device and method for removing acid in difluoromethane, it is related to filler absorption processing technical field, including leg frame, the top of the leg frame is equipped with gas collection tank, and the top opening position of the gas collection tank is fixed with shower tank, one end inside the gas collection tank is equipped with the convex hollow filler box for filling filler, the central position of convex hollow filler box inside is equipped with air guide cylinder, and the upper end of air guide cylinder is located at the bottom end of shower tank.The application avoids short circuit or invalid area caused by uneven distribution in static filler, significantly improves the actual effective utilization rate of filler, and the mechanical friction and collision generated by the continuous movement of filler can effectively strip and crush the possible trace amount of polymer, high-boiling substance or salt crystal and other deposits, so that they are discharged with waste lye, further reduce the risk of particulate matter retention accumulation, ensure that filler layer pore is unblocked for a long time.

The invention discloses an air conditioner refrigerant composition suitable for an automobile and an air conditioner system, and relates to the technical field of air conditioner refrigerants. The air conditioner refrigerant composition suitable for the automobile is prepared from the following components: 3, 3, 3-trifluoropropyne, propylene, 2, 3, 3, 3-tetrafluoropropene and difluoromethane. According to the air conditioner refrigerant composition suitable for the automobile and the air conditioner system, the GWP of the air conditioner refrigerant composition is smaller than 150, the ODP of the air conditioner refrigerant composition is 0, the air conditioner refrigerant composition has the obvious environmental protection advantage and the characteristic of low boiling point, it can be guaranteed that heat is absorbed more easily in the low-temperature environment, the air conditioner refrigerant composition has the larger volume refrigerating capacity, and the size of a compressor is further reduced.

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.

According to the present invention, a composition comprising the following is provided: (a) 1,1-difluoroethylene (R-1132a), (b) Difluoromethane (R-32), (c) 1,1-difluoroethane (R-152a), and (d)trans-1,3,3,3-tetrafluoropropene (R-1234ze(E)).

To solve the above problems, the present application provides a novel low-GWP mixed refrigerant. The present application provides a composition containing a refrigerant containing trans-1,2-difluoroethylene (HFO-1132(E)), trifluoroiodomethane (CF3I), 2,3,3,3-tetrafluoro-1-propene (R1234yf), and difluoromethane (R32).

Method for retrofitting an existing heat transfer system comprising adding to said existing system a refrigerant consisting essentially of: (i) from about 25% to about 45% by weight of 1,1,1,2-tetrafluoroethane (HFC-134a); (ii) from 25% to about 35% by weight of trans-1,3,3,3-tetrafluoropropene (HFO-1234ze(E)) and / or 2,3,3,3-tetrafluoropropene (HFO-1234yf); and (iii) from about 37% to about 46% by weight of a combination of difluoromethane (HFC-32) and pentafluoroethane (HFC-125), provided that the weight ratio of HFO-32:HFC-125 is from about 1.21:1 to about 0.8:1, wherein the refrigerant preferably is a non-flammable refrigerant having a GWP of 1350 or less.

The invention belongs to the technical field of refrigerants, and particularly relates to a low-GWP alternative refrigerant for R410A as well as a preparation method and application of the low-GWP alternative refrigerant. The alternative refrigerant is a near azeotropic mixture and comprises the following components in parts by weight: 25 to 35 parts of difluoromethane (R32), 35 to 55 parts of 1, 1, 1, 2, 2-pentafluoroethane (R125) and 20 to 30 parts of 1, 1, 2-trifluoroethylene (R1123). The refrigerant disclosed by the invention has the characteristics of good environmental protection property, high refrigerating capacity per unit volume, small temperature slippage and excellent thermodynamic property, and is particularly suitable for directly replacing an air conditioning system without modifying existing equipment.

The present invention provides a composition comprising (a) 1,1-difluoroethylene (R-1132a), (b) difluoromethane (R-32), (c) trans-1,2-difluoroethylene (R-1132(E)), and (d) one or more of trans-1,3,3,3-tetrafluoropropene (R-1234ze(E)), 1,1-difluoroethane (R-152a), and 2,3,3,3-tetrafluoropropene (R-1234yf).

The invention discloses a refrigerant, a preparation method thereof and a heat pump, belongs to the technical field of refrigerants, and solves the problems that in the prior art, a heat pump of a conventional refrigerant cannot operate normally at the extreme temperature, the heating capacity is sharply reduced due to temperature reduction, and the operation reliability of the heat pump at the extreme low temperature is affected due to the fact that the condensing pressure and the pressure ratio of the refrigerant are too high. The invention discloses a refrigerant which comprises the following components in percentage by mass: 5-20% of carbon dioxide, 50-80% of difluoromethane and the balance of propane, and the mass percent of the propane is greater than 0%.

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).

This composition contains: trifluoroethylene or trans-1,2-difluoroethylene; difluoromethane; propane; and 1,1-difluoroethane. The composition has a global warming potential of at most 150, and a heat of combustion of at most 28.000 MJ / kg.

This invention provides a method for synthesizing liquid crystal compounds. This method uses dihaloalkanes and difluoromethane with leaving groups as raw materials to synthesize liquid crystal compounds while ensuring high yield and significantly reducing production costs.

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 belongs to the technical field of sodium ion batteries, and discloses an electrolyte for improving the cycling stability of a nickel-manganese-based positive electrode material as well as preparation and application of the electrolyte. According to the electrolyte, at least one of chain carbonates and cyclic carbonates serves as a solvent, sodium hexafluorophosphate serves as sodium salt, sodium difluoromethane sulfinate and fluoroethylene carbonate are introduced to serve as composite additives, the mass fraction of DFMS ranges from 0.05% to 0.6%, and the mass fraction of FEC ranges from 1% to 3%. When the electrolyte is used in a nickel-manganese-based layered oxide positive electrode / sodium battery, a stable and compact fluorine-containing and sulfur-containing interface film can be constructed on the surface of the positive electrode, the film impedance and the charge transfer impedance are remarkably reduced, the dissolution of transition metal is inhibited, the cycle life of the battery is prolonged, the capacity retention ratio is increased, and the rate capability is improved; compared with basic electrolyte without additives, the electrolyte has obvious comprehensive performance advantages.

A refrigerant composition includes about 90-92 wt % difluoromethane and about 8-10 wt % pentafluoroethane. The refrigerant composition is formed from all recycled materials, and the refrigerant composition is a zeotrope. A method of preparing the refrigerant composition includes injecting a mixture of recovered refrigerants into the center of a distillation column, the mixture of injected refrigerants being difluoromethane, pentafluoroethane and chlorodifluoromethane, removing from the top of the distillation column a refrigerant composition of about 90-92 wt % difluoromethane and about 8-10 wt % pentafluoroethane, and removing chlorodifluoromethane from a bottom of the distillation column.

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 present application provides a kind of composition, preparation and its preparation method and purposes for treating skin pruritus.The composition for treating skin pruritus is composed of hydrocarbon halide and / or hydrocarbon.The hydrocarbon halide is one, two or more than three combinations of difluoromonochloromethane, difluoromethane, trifluoromonochloromethane, tetrafluoromethane, dichlorotrifluoroethane, difluoroethane, monochlorodifluoroethane, tetrafluoroethane, hexafluoroethane, chloroethane, pentafluoropropane and / or octafluoropropane.The hydrocarbon is one, two or more than three combinations of methane, ethane, propane, butane, cycloethane, cyclopropane and / or cyclobutane.The composition or preparation of the present application has excellent effects when used as a drug for treating skin pruritus, such as relieving pruritus symptoms quickly, reducing the risk of infection, shortening the course of the disease and reducing the economic burden of patients.