19 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 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 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.

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.

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

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.

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 invention provides a refrigerant-containing composition which has a low GWP and which has the characteristics of cooling capacity and COP equivalent to those of R410A. Specifically, the present invention provides a composition which contains difluoromethane (R32) and pentafluoroethane (R125), the total concentration of R32 and R125 being 99.5 mass% or more, and the content ratio of R32 being 53.1-56.0 mass% and the content ratio of R125 being 44.0-46.9 mass% with respect to the total mass of R32 and R125.

The invention belongs to the technical field of refrigerants, and particularly relates to a low-GWP refrigerant capable of replacing R410A as well as a preparation method and application of the low-GWP refrigerant. The alternative refrigerant is a near-azeotropic mixture and comprises the following components in parts by weight: 55 to 65 parts of difluoromethane (R32), 30 to 40 parts of 1, 1, 1, 2, 2-pentafluoroethane (R125) and 1 to 10 parts of n-butane (R600). Compared with R410A, the refrigerant disclosed by the invention has the advantages that the GWP value is obviously reduced, the slippage temperature of the refrigerant is lower, the environmental protection property is obviously improved, the refrigeration performance is excellent, and the thermodynamic property matching is good.

The invention belongs to the technical field of catalyst regeneration, and particularly relates to an efficient catalyst regeneration method for a pentafluoroethane production device, which comprises the following steps: S1, pretreatment and deep desorption: after reaction feeding is stopped, purging a catalyst bed at 200-300 DEG C by using high-purity nitrogen, and thoroughly removing physically adsorbed HF and organic residues; s2, a cyclic regeneration stage: controllable oxidation and fluorination-reconstruction are carried out, and controllable oxidation comprises the following steps: inert gas mixed gas with low oxygen concentration is introduced into a reactor in a pulse mode, treatment is carried out for 0.5-2 hours at the temperature of 350-450 DEG C, and the temperature interval of 350-450 DEG C is subdivided into 2-3 steps. The regeneration process is mild and controllable, the service life of the catalyst is greatly prolonged, the regeneration end point is accurately and intelligently judged, and insufficient regeneration or excessive regeneration is avoided.

The invention belongs to the technical field of refrigerants, and particularly relates to a substitute refrigerant of HCFC-22 as well as a preparation method and application of the substitute refrigerant. The alternative refrigerant is prepared from the following components in parts by weight: 60 to 70 parts of difluoromethane, 10 to 20 parts of pentafluoroethane and 15 to 25 parts of 1, 1, 1, 2, 3, 3, 3-heptafluoropropane. The ODP of the refrigerant is zero, the GWP of the refrigerant is equal to or lower than that of R22, and the refrigerant is especially designed for the harsh working conditions that a water-cooled refrigerating system, a refrigeration house unit and the like operate at the high condensing temperature. The refrigerating capacity per unit volume is remarkably improved compared with that of R22, excellent thermal stability and system reliability are shown on the premise that the working pressure is remarkably lower than that of R22, and the refrigerating fluid is an ideal choice for replacing an existing R22 system and particularly for high-pressure-difference and high-load application scenes such as freezing, cold storage and medium-sized central air conditioners.

The alkaline washing tower comprises a machine body, an air inlet pipe is fixedly installed at the lower end of the right wall face of the machine body in a penetrating mode, a spring is fixedly installed on the left portion of the inner bottom face of the machine body in an embedded mode, and a protruding block is fixedly installed on the right side of the spring. According to the alkaline washing tower for pentafluoroethane production, a user adsorbs impurities in a gas raw material through an activated carbon adsorption plate, large particles are filtered, the gas raw material enters equipment through a conveying pipe, an alkaline solution is conveyed to a spraying head by starting a pump body, the spraying head is started to mix the gas raw material, and the gas raw material enters the equipment; meanwhile, a transmission motor is started to rotate to drive a rotating rod to rotate, and the rotating rod rotates to drive a second bevel gear set to rotate, so that stirring blades are driven to stir the gas raw materials, the mixing reaction of the alkaline solution and the gas raw materials is accelerated, the working efficiency of the equipment is improved, and the alkaline solution is recycled through a pump body during treatment; and the treatment cost of gas raw materials is reduced.

The invention belongs to the technical field of pentafluoroethane, particularly relates to a method for inhibiting a byproduct tetrafluoroethane in pentafluoroethane production, and aims to solve the problem that an isolated single-parameter regulation strategy is generally adopted to inhibit the tetrafluoroethane in the prior art, so that a side reaction cannot be accurately inhibited for a long time while a main reaction is efficiently carried out. According to the scheme, the method comprises the following steps: S1, carrying out deep dehydration pretreatment on tetrafluoroethylene and hydrogen fluoride raw materials; s2, carrying out in-situ gradient programmed heating activation on the chromium-based catalyst; s3, performing uniform temperature field control on the fixed bed reactor; s4, cooperatively regulating and controlling the molar ratio of tetrafluoroethylene to hydrogen fluoride and the reaction space velocity; according to the method disclosed by the invention, long-acting and accurate inhibition on the byproduct tetrafluoroethane is realized through multi-dimensional coordinated regulation and whole-process optimization, and energy consumption and environmental protection pressure are reduced while the yield and purity of pentafluoroethane are remarkably improved.