99 results about "Difluoromethane" patented technology

The invention belongs to the technical field of tail gas treatment, particularly relates to a tail gas treatment device for difluoromethane preparation, and provides the following scheme aiming at the problem that the existing tail gas treatment device for difluoromethane preparation is not easy to maintain and upgrade: the tail gas treatment device comprises an absorption tank; the upper side of the fixed base is connected with the bottom of the absorption tank through a flange, a round hole is formed in the bottom of the fixed base, a conveying pipe is fixedly connected into the round hole, the upper side of the absorption tank is fixedly connected with a discharge pipe and a combustion bin, and the inner wall of the combustion bin is fixedly connected with the exterior of the discharge pipe; one end of the discharge pipe away from the absorption tank is fixedly connected with a nozzle. According to the tail gas treatment device for difluoromethane preparation, the tail gas treatment device can be designed into a filtering module and an alkali washing module, so that the tail gas treatment efficiency of the device can be improved under the condition that the overall complexity is not increased, and the tail gas treatment device is convenient to maintain and upgrade.

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.

The invention discloses a heat transfer composition as well as a preparation method and application thereof. According to the total mass of the composition, the mass ratios of the first component, trans-1, 3, 3, 3-tetrafluoropropene and difluoromethane are x%, y% and z% respectively, the first component is 2, 3, 3, 3-tetrafluoropropene and 1, 1-difluoroethane, the ratios (x, y and z) of the first component, the trans-1, 3, 3, 3-tetrafluoropropene and 1, 1-difluoroethane are located in a ternary phase diagram, the x coordinate of a point A is 23.6%, the x coordinate of a point B is 90.0%, the point coordinates on a curve section AB are (x, 70.06-0.6395 x-0. 001538 x2 and 29.94-0.3605 x + 0.001538 x2), and the coordinates of a point C are (77.6, 0 and 22.4 The GWP of the composition does not exceed 150, the flammability grade reaches A2L, and the composition is a heat transfer composition which is used for replacing propane and is low in global warming potential value, high in refrigeration / heat efficiency and low in flammability and is suitable for refrigeration / heating application.

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).

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.

The present disclosure provides a novel refrigerant mixture having a low GWP. Specifically, the present disclosure provides a refrigerant-containing composition, wherein the refrigerant comprises trans-1,2-difluoroethylene (HFO-1132(E)), propane, and 1,1-difluoroethylene (HFO-1132a) and may further include difluoromethane (R32), the proportions of these compounds being limited so as to be in certain ranges.

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 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 application provides a heat exchange system, comprising a refrigerant composition, and a compressor, a condenser, a throttling element, an evaporator and a first heat exchange device, wherein the refrigerant composition comprises 52wt%-62wt% of 1,1,1,2-tetrafluoroethane, 32wt%-40wt% of difluoromethane and 4wt%-8wt% of carbon dioxide, and the refrigerant composition is a non-azeotropic composition; and the temperature glide of the refrigerant composition is 6.5-10.5 DEG C under the working condition of a condensing temperature of 65 DEG C. The heat exchange system of the application has the temperature glide characteristic due to the use of the non-azeotropic refrigerant composition. The temperature glide enables the refrigerant to gradually evaporate and condense at different temperatures in the evaporator and the condenser, and better matches the temperature gradient of the heat exchanger, thereby improving the heat exchange efficiency.

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 discloses a tail gas treatment multi-cycle adsorption tower for difluoromethane processing. The tail gas treatment multi-cycle adsorption tower comprises a base, a tower body, a gas inlet pipe, a gas exhaust assembly, a replacement mechanism and an adjusting mechanism, the adjusting mechanism comprises a segmentation mechanism; the segmentation mechanism comprises a plurality of groups of segmentation small holes, a plurality of segmentation circular rings, an annular air cavity and an air transmission connecting pipe; a gradient regulator is arranged between the gas transmission connecting pipe and the exhaust assembly and comprises an intensive long cylinder, the intensive long cylinder penetrates through the supporting bottom ring and the supporting top ring and is provided with a plurality of small socket holes, the end of the gas transmission connecting pipe is fixedly inserted into the small socket holes, and the end face of the gas transmission connecting pipe is flush with the inner wall of the intensive long cylinder. The bottom surface of an inner cavity of the intensive long cylinder is fixedly connected with a reset spring, the other end of the reset spring is fixedly connected with a partition piston, the partition piston is inserted into the intensive long cylinder in a sliding mode, and the top surface of the partition piston is fixedly connected with a fixed-distance short rod.

Disclosed is a composition comprising difluoromethane (R-32), 2,3,3,3-tetrafluoropropene (R-1234yf), and isobutane (R-600a). A refrigeration system, including a hermetic compressor and a refrigerant composition. The refrigerant composition includes difluoromethane (R-32), 2,3,3,3-tetrafluoropropene (R-1234yf), and isobutane (R-600a).

The present disclosure provides a mixed refrigerant having four types of performance, i.e., an excellent coefficient of performance and refrigerating capacity that allow it to serve as an alternative refrigerant for R410A, a sufficiently low GWP, and non-flammability. Specifically, the present disclosure provides a composition comprising a refrigerant, the refrigerant comprising trifluoroiodomethane (CF3I) and difluoromethane (R32), wherein the contents of CF3I and R32 in the refrigerant are respectively 48 mass %≥CF3I≥46 mass % and 54 mass %≥R32≥52 mass %, based on the total amount of CF3I and R32 taken as 100 mass %.

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 present disclosure relates to refrigeration, air conditioning and heat pump apparatus containing a lubricating composition comprising polyol ester lubricant, tetrafluoropropene and difluoromethane.

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).

A refrigerant composition is made up of approximately 72-74% difluoromethane, 7-8% pentafluoroethane, 1-3% carbon dioxide, and 17-19% 1,3,3,3-tetrafluoropropene. This mixture is formed from recycled difluoromethane and pentafluoroethane, which have a net global warming potential of 0. The method of preparing this refrigerant involves injecting a mixture of recovered refrigerants, including difluoromethane, pentafluoroethane, and chlorodifluoromethane, into the center of a distillation column. The top of the column yields a refrigerant composition of 90-92% difluoromethane and 8-10% pentafluoroethane. Chlorodifluoromethane is removed from the bottom of the column. This refrigerant composition is used to create a low global warming potential refrigerant that can be used as a drop-in replacement for R-454B.

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.