38 results about "Pentafluoroethane" 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 invention belongs to the technical field of waste catalyst treatment, particularly relates to a treatment process for a waste catalyst in pentafluoroethane production, and provides the following scheme aiming at the problems that in an existing treatment process for the waste catalyst in the pentafluoroethane production, the waste catalyst cannot be sufficiently treated conveniently, the treatment effect is limited, and the recovery rate is reduced. The method comprises the following steps: S1, collecting the waste catalyst, and standing for a certain time; s2, adding part of the waste catalyst into the reaction solution, and mixing; s3, the treated reaction liquid is subjected to electrolysis, and pentafluoroethane is prepared; s4, adding the residual waste catalyst into the reaction solution, and stirring and mixing; and S5, standing the treated reaction liquid, and in the treatment process of the waste catalyst in pentafluoroethane production, the waste catalyst is subjected to electrolysis and reaction with the KOH aqueous solution at the same time, so that the treatment efficiency and the recovery rate can be effectively improved.

To provide a power storage device which is small in degradation in charge / discharge characteristics owing to a heat treatment, or a power storage device which is high in safety during a heating process.SOLUTION: A power storage device comprises a positive electrode, a negative electrode, a separator, an electrolyte, and an outer packaging body. The separator is located between the positive and negative electrodes, and contains polyphenylene sulfide or cellulose fiber. The electrolyte contains propylene carbonate, ethylene carbonate, vinylene carbonate, lithium hexafluorophosphate, and lithium bis(pentafluoroethanesulfonyl)amide. The concentration of the lithium hexafluorophosphate is 0.01 wt.% or more and 1.9 wt.% or less in weight percentage to the electrolyte.SELECTED DRAWING: Figure 43

The utility model relates to the technical field of pentafluoroethane production, in particular to a hydrofluoric acid absorption and concentration system for tail gas in pentafluoroethane production. The hydrofluoric acid absorption and concentration system comprises a tail gas absorption tower, a lower gas inlet of the tail gas absorption tower is connected with a tail gas pipeline through a first gas inlet pipe, and a top gas outlet of the tail gas absorption tower is connected with a lower gas inlet of an auxiliary tail gas absorption tower through a second gas inlet pipe. A bottom liquid outlet of the tail gas absorption auxiliary tower is connected with a second backflow pipe through a second liquid outlet pipe, the second backflow pipe is connected with a bottom heating medium inlet of the graphite heat exchanger, a top heating medium outlet of the graphite heat exchanger is connected with a spraying pipe in the tail gas absorption auxiliary tower through a third backflow pipe, and the second liquid outlet pipe is connected with a solution discharging pipe. The hydrofluoric acid concentration device effectively concentrates hydrofluoric acid obtained by tail gas absorption.

The invention belongs to the field of pentafluoroethane purification, particularly relates to an extractive distillation device for pentafluoroethane purification, and aims to solve the problem that the extractive distillation effect is poor due to the fact that an existing pentafluoroethane crude product is inconvenient to fully and uniformly contact with an extracting agent. The mounting seat is fixedly mounted in the rectifying tower; the hollow column is fixedly mounted on one side of the mounting seat; the feeding pipe is mounted on the rectifying tower, and one end of the feeding pipe extends into the hollow column; the rotating pipe is rotationally mounted at the top of the hollow column, the bottom end of the rotating pipe extends into the hollow column and is fixedly provided with a hollow rod, a plurality of liquid spraying holes are formed in the hollow rod, and a plurality of turbulent flow blocks are fixedly mounted on the outer side of the hollow rod; according to the device, a gas-phase pentafluoroethane crude product is stirred, meanwhile, the rotating pipe rotates, so that the spraying range of extract liquor is larger, the gas-phase pentafluoroethane crude product is in uniform and sufficient contact with an extraction agent, and the extraction effect is improved.

The utility model discloses a drying device for producing pentafluoroethane, which relates to the field of pentafluoroethane production and comprises a cooling and drying part and a second shell, the cooling and drying part comprises a first shell, an inner shell is arranged in the first shell, the left end of the inner shell communicates with an air inlet pipe, the left end of the air inlet pipe penetrates through the first shell, and a cooling part is arranged in the first shell; the second shell and the first shell are connected through an air guide pipe, and a water absorption drying part is arranged in the middle of the second shell. The pentafluoroethane drying device has the advantages that water vapor in pentafluoroethane can be cooled, condensed and removed, water vapor in pentafluoroethane can be adsorbed, dried and removed, the limitation of a mold on water vapor separation due to mold separation and filtration is effectively avoided, and the drying efficiency of pentafluoroethane can be effectively improved; and the drying layer and the drying cylinder are of an integrated structure, so that the water absorbing and drying part can be disassembled and assembled conveniently, great convenience is brought to replacement of the drying layer, and popularization and use of the product are facilitated.

The invention belongs to the field of pentafluoroethane production, and particularly relates to a model-based multivariable pre-estimation control method for a pentafluoroethane production process, which comprises the following steps of: S1, constructing a digital twin hybrid model of the pentafluoroethane production process; s2, on the basis of the digital twin hybrid model, estimating a catalyst performance index on line; s3, dynamically reconstructing an economic optimization objective function according to the catalyst performance index; s4, calculating a dynamic risk boundary of the key safety parameters; and S5, executing economic-safety multi-target rolling optimization fused with the dynamic risk boundaries. According to the method, high-precision and self-evolution process control is realized, full-period and self-adaptive economic optimization is realized, crossing from rigid constraint to flexible risk management and control is realized, an economic-safety-environment-friendly multi-target collaborative optimization framework is constructed, and the economic-safety multi-target rolling optimization fused with the dynamic risk boundaries is realized. And the intelligent level and the long-term stability of the control system are improved.

In this method for producing tetrafluoroethylene and octafluorocyclobutane, 1,1,1,2,2-pentafluoroethane is converted into tetrafluoroethylene and octafluorocyclobutane in a gas phase in the presence of silicon oxide. In this conversion, no diluent is used, or 60 vol% or less of a diluent is used relative to the total amount of 1,1,1,2,2-pentafluoroethane and the diluent.

The utility model provides a pentafluoroethane catalyst regeneration device, which relates to the technical field of catalyst regeneration and comprises a heating cavity, a door body is mounted at the front end of the heating cavity in a hinged manner, electric heating wires are mounted on two sides in the heating cavity, and an automatic pressure relief mechanism is arranged on one side of the heating cavity; an automatic pressure relief mechanism is arranged on one side of an electric heating wire, and a fixed cavity, an air outlet cavity, a purification cavity, an adsorption plate, a piston, a movable plate, a telescopic spring, a threaded groove, a threaded rod, a rotating wheel, a limiting groove and a limiting block of the automatic pressure relief mechanism are matched with one another, so that the heating cavity can be subjected to automatic pressure relief treatment; and meanwhile, gas in the heating cavity can be adsorbed and purified, so that the gas is discharged into the air, the air is not prone to being polluted, the body health of workers is not prone to being affected, meanwhile, a piston can be driven to move, exhaust treatment is conducted on the heating cavity, and therefore the practicability of the device in the using process is greatly improved.

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 refrigerant composition includes about about 56-60 wt % 1,1,1,2-tetrafluoroethane; about 0.1-1 wt % pentafluoroethane; about 3-7 wt % difluoromethane; and about 35-38 wt % 1,3,3,3-tetrafluoropropene, where the composition is zeotropic. The composition has a 91:9 wt % ratio of difluoromethane to pentaflouromethane, which are recycled materials having a net gwp of 0. The 1,3,3,3-tetrafluoropropene also has gwp of about 0. A method of preparing the 91:9 wt % refrigerant mixture 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.

The invention provides an FDY oiling agent capable of being directly oiled by crude oil, a preparation method and a spinning device. The FDY oiling agent capable of being directly oiled by crude oil comprises the following components in parts by weight: 58-62 parts of a composite smoothing agent, 16-20 parts of an emulsifier, 5-9 parts of an antistatic agent, 3-7 parts of a penetrant and 6-10 parts of deionized water, and the antistatic agent is tributyl hexylammonium bis (pentafluoroethane sulfonyl) imine. According to the FDY oiling agent capable of being directly oiled by crude oil, the preparation method and the spinning device, the tributyl hexylammonium bis (pentafluoroethanesulfonyl) imine is selected as the antistatic agent, so that the spinning oiling agent is efficient and stable in static resistance in a full-humidity range, and the FDY oiling agent is particularly suitable for industrial scenes (such as winter drying workshops in the north) with poor requirements on constant temperature and humidity; the problem of unstable quality caused by humidity fluctuation of a traditional antistatic agent is solved.

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.

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.

The utility model relates to the technical field of pentafluoroethane production, in particular to a pentafluoroethane catalyst regeneration optimization device. The pentafluoroethane catalyst regeneration optimization device comprises an AHF pipeline and an N2 pipeline, an AHF flowmeter and an AHF regulating valve are arranged on the AHF pipeline, an N2 flowmeter and an N2 regulating valve are arranged on the N2 pipeline, the AHF pipeline and the N2 pipeline are both connected with an inlet of a preheater, an outlet of the preheater is connected with an inlet of a mixing tank, an outlet of the mixing tank is connected with a gas inlet in the top of a reactor through a gas feeding pipe, and the gas feeding pipe is connected with a gas outlet in the top of the reactor. The bottom outlet of the reactor is connected with an alkaline tower, the upper part of the alkaline tower is provided with an alkaline water pipe and is connected with an alkaline water tank, the top of the alkaline tower is provided with a gas outlet pipe, the gas outlet pipe is connected with the alkaline water pipe, the gas outlet pipe is provided with a condenser, and the gas outlet of the condenser is connected with the N2 pipeline through a gas return pipe. According to the utility model, corrosion of hydrofluoric acid to equipment is reduced; the catalyst is protected, and the service cycle and the service life of the catalyst are prolonged.

Provided are a tetrafluoroethylene production method that uses a fluorocarbon as a raw material, and a composition containing tetrafluoroethylene.　The production method according to the present disclosure comprises a step in which tetrafluoroethylene is obtained by subjecting pentafluoroethane to a base treatment using a basic compound. The composition according to the present disclosure contains tetrafluoroethylene and pentafluoroethane. The tetrafluoroethylene production method according to the present disclosure makes it possible to obtain tetrafluoroethylene by means of a simple step at a mild temperature.

The present application provides a kind of crude oil directly oilable FDY oil agent, preparation method and spinning device, the crude oil directly oilable FDY oil agent includes the following weight parts ingredients: composite smoothing agent 58-62 parts, emulsifier 16-20 parts, antistatic agent 5-9 parts, penetrating agent 3-7 parts, deionized water 6-10 parts, the antistatic agent is tributylhexylammonium bis (pentafluoroethane sulfonate) imine.The crude oil directly oilable FDY oil agent, preparation method and spinning device of the present application select tributylhexylammonium bis (pentafluoroethane sulfonate) imine as antistatic agent, realize the high efficiency, stable antistatic of spinning oil agent in full humidity range, especially suitable for the industrial scene (such as northern winter dry workshop) that constant temperature and humidity requirement is not strict, solve the quality unstable problem caused by humidity fluctuation of traditional antistatic agent.

Disclosed is a method for producing hexafluoropropene, with which a product containing hexafluoropropene is obtained by bringing a compound (A) represented by formula (A) into contact with at least one compound (B) that is selected from the group consisting of octafluorocyclobutane, pentafluoroethane, octafluoro-1-butene, and octafluoro-2-butene, and subsequently heating the resultant mixture at a reaction temperature of 780°C or higher in a reactor. In formula (A), X is a hydrogen atom, a fluorine atom, a chlorine atom, a bromine atom, or an iodine atom.　(A): CHF2-X

Described herein are separation articles such as, for example, films, membranes and the like separating at least one component from a gaseous mixture comprising two or more components comprising difluoromethane (HFC-32, CH2F2) and pentafluoroethane (HFC-125, C2F5H). The disclosed articles include a “selective layer” that is selectively permeable for the desired component to be separated from the gas mixture. The selective layer is composed of an amorphous fluorinated copolymer. Optionally, the article may include other layers which serve various purposes such as, for example, a porous support layer, a “gutter layer,” which allows the permeate gas to pass from the selective layer to the porous layer with minimal flow impedance, and a protective layer, which protects the selective layer from fouling. Each component of the separation articles described herein and methods for making and using the same are provided below.

The utility model belongs to the technical field of post-treatment devices of chemical products, and particularly relates to a pentafluoroethane washing device. The pentafluoroethane washing device comprises a liquid phase washing tower, the upper portion of the liquid phase washing tower is connected with a crude product R125 feeding pipe, a feeding cooler is arranged on the crude product R125 feeding pipe, the lower portion of the liquid phase washing tower is connected with a purified water feeding pipe, a water inlet cooler is arranged on the purified water feeding pipe, a tower bottom pipeline of the liquid phase washing tower is divided into two paths, one path is connected with the alkali cooler, the other path is connected with the No.1 alkali separator, a cooling material outlet of the alkali cooler is connected with the No.1 alkali separator, and a material outlet of the No.1 alkali separator is connected with the No.2 alkali separator. According to the pentafluoroethane washing device provided by the utility model, the washing temperature is controlled, the stability of system operation is maintained, and the gasification of R125 is inhibited to the maximum extent, so that the recovery rate of products and the economic benefit of the production process are remarkably improved.

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 application relates to the chemical technology field and discloses a treatment method for waste catalysts in the production of pentafluoroethane, which comprises the following steps: step one, waste catalyst collection; step two, pretreatment; step three, ultrasonic-assisted separation; step four, solid residue treatment; and step five, metal recovery. The treatment method for waste catalysts in the production of pentafluoroethane has the advantages of high treatment efficiency, high metal recovery rate and high organic impurity removal rate, so that the waste catalysts can be effectively treated, and the waste can be effectively recycled and purified. In terms of flexibility, the selection of the solution and the additive and the setting of the process parameters can be adjusted to adapt to different production conditions and waste catalyst characteristics. From the environmental protection and economic perspectives, the treatment method can reduce the environmental pollution and bring economic value to enterprises.

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.

The present application relates to the technical field of fluorine-containing fine chemical separation, and in particular to a method and device for removing pentafluoro-chloroethane from crude pentafluoroethane. The method comprises: adding an azeotrope agent to crude pentafluoroethane containing pentafluoro-chloroethane impurities, azeotrope rectification, condensing the mixed gas obtained by azeotrope rectification, returning the liquefied pentafluoroethane to the azeotrope rectification step, and collecting the unliquefied mixed gas crude product; detecting the impurity content, and collecting the gas to obtain high-purity pentafluoroethane after the detection is qualified. The present application also provides a device for removing pentafluoro-chloroethane from crude pentafluoroethane. The method steps and operation of the present application are simple, and high-purity pentafluoroethane products can be obtained by only azeotrope rectification and condensation, while the remaining crude product is returned to the raw material tank to continue azeotrope rectification and purification. In addition, the device of the present application is simple and does not require complex multi-stage rectification equipment, thereby reducing the production cost of the product.

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 relates to the technical field of energy conversion medium, and specifically discloses a mixed refrigerant composition and a preparation method of the mixed refrigerant and application thereof.The mixed refrigerant composition comprises the following components: component A: 68-80 wt% of pentafluoroethane;component B: 18-30 wt% of 1,1-difluoroethane;component C: 2-10 wt% of hydrocarbon;wherein the hydrocarbon comprises propane, isobutane.The refrigerant prepared by using the composition has good refrigeration effect, can effectively replace R22 refrigerant, has low greenhouse effect, has an ODP value of 0, can avoid ozone layer destruction, is not flammable and explosive, and is high in safety during storage and use, and is particularly suitable for application in refrigeration devices such as air conditioners.

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).