33 results about "Pentafluoropropane" patented technology

The invention relates to the technical field of preparation of hydrofluoroolefin, in particular to a method for preparing 2, 3, 3, 3-tetrafluoropropene, which comprises the following steps: carrying out fluorination reaction on 3, 3, 3-trifluoro-2-chloropropene and excessive hydrogen fluoride under the action of a catalyst to generate a first mixture flow containing 1, 1, 1, 2, 2-pentafluoropropane (245cb), and separating the first mixture flow from the first mixture flow to obtain the 2, 3, 3, 3, 3-tetrafluoropropene. Then directly introducing the first mixture flow into a dehydrofluorination reactor for gas phase dehydrofluorination reaction to generate a second mixture flow containing 2, 3, 3, 3-tetrafluoropropene, hydrogen fluoride and unreacted raw materials, finally condensing the second mixture to remove hydrogen chloride, condensing and recycling hydrogen fluoride to obtain a third mixture flow, and rectifying the third mixture flow to obtain 2, 3, 3, 3-tetrafluoropropene. And 3, 3, 3, 3-tetrafluoropropene. According to the invention, unavoidable process wastes in the prior art are converted into recyclable reaction raw materials, the environmental protection and economic pressure of by-product treatment in the prior art is eliminated, meanwhile, the purpose of continuous flow reaction is effectively realized, and the process control difficulty and the process cost are reduced.

Disclosed in the present invention is a method for producing 2,3,3,3-tetrafluoropropene from 1,1,2,3,3,3-hexafluoropropene, comprising: (a) introducing 1,1,2,3,3,3-hexafluoropropene and hydrogen into a first reactor for a catalytic reaction to obtain a first reaction product; (b) separating the first reaction product to obtain 1,1,1,2,3,3-hexafluoropropane; (c) introducing 1,1,1,2,3,3-hexafluoropropane into a second reactor for a catalytic reaction to obtain a second reaction product; (d) separating the second reaction product to obtain 1,2,3,3,3-pentafluoropropene; (e) introducing 1,2,3,3,3-pentafluoropropene and hydrogen into a third reactor for a catalytic reaction to obtain a third reaction product; (f) separating the third reaction product to obtain 1,1,1,2,3-pentafluoropropane; (g) introducing 1,1,1,2,3-pentafluoropropane into a fourth reactor for a catalytic reaction to obtain a fourth reaction product; and (h) separating the fourth reaction product to obtain a final product of 2,3,3,3-tetrafluoropropene. The present invention has the advantages of being simple in process, low in cost, high in efficiency, green, and environmentally friendly.

A fluoropropene composition comprising Z-1,3,3,3-tetrafluoropropene, E-1,3,3,3-tetrafluoropropene, 1,1,3,3,3-pentafluoropropene, 2,3,3,3-tetrafluoropropene, and optionally 1,1,1,3,3-pentafluoropropane wherein the 2,3,3,3-tetrafluoropropene being present in an amount of 0.00001 to 1.0%. A method of producing the fluoropropene, methods for using the fluoropropene and the composition formed are also disclosed.

The present application discloses a full-process continuous process for synthesizing 1,1,1,3,3-pentafluoropropane, including a telomerization reaction: vinyl chloride, carbon tetrachloride, catalyst 1 and a cocatalyst are added to a pre-reactor mixer for premixing to obtain mixture 1, mixture 1 is pumped into a reactor system for telomerization reaction to obtain the material of the telomerization reaction, the material of the telomerization reaction is continuously pumped out and separated to obtain R240fa, and the separated vinyl chloride, carbon tetrachloride, catalyst 1, cocatalyst and unseparated R240fa are returned to the pre-reactor mixer for continuous reaction; a fluorination reaction: the R240fa, chlorine gas and anhydrous hydrogen fluoride obtained from the telomerization reaction are continuously introduced into a fluorination reaction kettle containing activated catalyst 2 for fluorination reaction to obtain a fluorination reaction product, the fluorination reaction product is separated to obtain 1,1,1,3,3-pentafluoropropane, and the remaining product after separating 1,1,1,3,3-pentafluoropropane is returned to the fluorination reaction kettle for continuous reaction.

The invention belongs to the field of refrigerants, the field of fire fighting, the field of fluorine chemical engineering new materials, the field of foaming agents and the field of chemical synthesis, and particularly relates to a synthesis method of 1, 1, 1, 2, 3-pentafluoropropane and 2, 3, 3, 3-tetrafluoropropene. The synthesis method of the 1, 1, 1, 2, 3-pentafluoropropane comprises the following steps: carrying out a first reaction on 3, 3, 3-trifluoropropene, a first catalyst, an HF source and a selective fluorine reagent in a first solvent to obtain the 1, 1, 1, 2, 3-pentafluoropropane. The synthetic method of the 2, 3, 3, 3-tetrafluoropropene comprises the following step: carrying out a second reaction on the obtained 1, 1, 1, 2, 3-pentafluoropropane in the presence of a second catalyst to obtain the 2, 3, 3, 3-tetrafluoropropene. The synthesis method of 1, 1, 1, 2, 3-pentafluoropropane provided by the invention has the advantages of simplicity in operation, short time consumption, mild reaction, simple reagents required by reaction, high substrate conversion rate, high target product selectivity and the like, and is beneficial to industrial production. The preparation method of 2, 3, 3, 3-tetrafluoropropene provided by the invention has the advantages of safety, environmental protection, simplicity in operation, mild reaction, high yield, high target product selectivity, high reaction speed and the like, and is beneficial to industrial production.

An object of the present invention is to provide a method that can efficiently remove water contained in pentafluoropropane. Provided as a solution is a method comprising distilling a composition comprising pentafluoropropane and water to thereby extract pentafluoropropane with a water content higher than that of the composition as a first stream, and pentafluoropropane with a water content lower than that of the composition as a second stream.

The application discloses rigid polyurethane foam, a preparation method and a refrigeration appliance, comprising: a combined polyether; isocyanate; foaming agent I, the foaming agent I is one of cyclopentane and isopentane or a mixture composed of cyclopentane and isopentane in any proportion; foaming agent II, the foaming agent II is one of pentafluoropropane and trifluoro-chloro-propylene or a mixture composed of pentafluoropropane and trifluoro-chloro-propylene in any proportion; and foaming agent III, the foaming agent III adopts perfluoromethyl vinyl ether. By adding perfluoromethyl vinyl ether as a foaming agent, the application overcomes the foam cavity problem of a low-boiling-point foaming system, reduces the foam molding density, improves the supporting capacity of low-density rigid polyurethane foam, and has low cost and high practicability.

The application discloses a catalyst for preparing 1,1,1,2,3-pentafluoropropane by hydrogenating 1,1,1,2,3-pentafluoropropane, which is composed of a carrier, an active component supported on the carrier and an auxiliary component, the carrier is alumina, the active component is Cu, and the auxiliary component is Mo and Nb; the content of Cu is 3-27%, the content of Mo is 2-6%, the content of Nb is 2-6% and the balance is the carrier in the catalyst with the weight of 100%. Meanwhile, the application also discloses a preparation method and application of the catalyst. The catalyst provided by the application has wide applicability, is suitable for various solvent systems with different concentrations and different solvents, can continuously keep the conversion rate of 1,1,1,2,3-pentafluoropropane above 99% and the selectivity of 1,1,1,2,3-pentafluoropropane above 99.5% in a fixed-bed hydrogenation reactor for a long time.

To provide use of a fluoropropane of CF3CH=CHF as a refrigerant.SOLUTION: The invention provides use, as a refrigerant, of a fluoropropane of formula CF3CH=CHF produced by a production method of the fluoropropane of CF3CH=CHF. The production method comprises contacting a mixture of 1,1,1,3,3-pentafluoropropane and Z-1,3,3,3-tetrafluoropropene in the gas phase with a catalyst comprising at least one catalyst selected from the group consisting of fluorinated Cr2O3 or Cr / Ni on fluoride alumina, in the presence of an oxygen containing gas, to form a mixture comprising Z-1,3,3,3-tetrafluoropropane, E-1,3,3,3-tetrafluoropropene, hydrogen fluoride, and optionally unreacted 1,1,1,3,3-pentafluoropropane, separating the E-1,3,3,3-tetrafluoropropene from the Z-isomer and, if present, any unreacted 1,1,1,3,3-pentafluoropropane, and recovering the Z-1,3,3,3-tetrafluoropropene.SELECTED DRAWING: None

The utility model discloses a cooler for separating perfluoropropane byproduct HCL, which comprises a base, an HCL separating tower body is arranged on one side of the top of the base, an L-shaped plate is fixedly connected to the outer contour of the HCL separating tower body close to the top, a connecting plate is slidably connected to one side of the L-shaped plate far away from the HCL separating tower body in a limited manner, and the connecting plate is fixedly connected to the connecting plate. A cooler body is fixedly connected to the top of the connecting plate, and a lifting supporting mechanism is arranged on the other side of the top of the base. According to the utility model, through the arrangement of the liftable supporting mechanism, the cooler body can be placed on the connecting plate before the cooler body is installed, then the cooler body is moved upwards to a specified position, then the protective shell can be closed through the proximity switch, and then a worker connects parts on the connecting plate with parts on the HCL separation tower body; the cooler body is convenient to mount and dismount by a worker, and the maintenance efficiency of the cooler body by the worker is improved.

A fluoropropene composition comprising Z-1,3,3,3-tetrafluoropropene, E-1,3,3,3-tetrafluoropropene, 1,1,3,3,3-pentafluoropropene, 2,3,3,3-tetrafluoropropene, and optionally 1,1,1,3,3-pentafluoropropane wherein the 2,3,3,3-tetrafluoropropene being present in an amount of 0.00001 to 1.0%. A method of producing the fluoropropene, methods for using the fluoropropene and the composition formed are also disclosed.

The invention discloses a method for efficiently preparing an environment-friendly refrigerant R-1234yf, and relates to the field of preparation of refrigerants. The method comprises the following steps: introducing 1, 2, 3, 3, 3-pentafluoropropylene and hydrogen into a fixed bed reactor, and reacting in the presence of a hydrogenation catalyst at set temperature and pressure to generate pentafluoropropane; performing HF elimination reaction on the pentafluoropropane under high-temperature catalysis to generate an environment-friendly refrigerant R-1234yf; and introducing the R-1234yf into a rectifying tower for rectifying, separating and purifying to obtain the high-purity R-1234yf. The invention provides an efficient, environment-friendly and controllable R-1234yf preparation method, the requirements of the modern refrigeration field on green and environment-friendly refrigerants are met, and the production efficiency and economical efficiency are remarkably improved.

A fluoropropene composition comprising Z-1,3,3,3-tetrafluoropropene, E-1,3,3,3-tetrafluoropropene, 2,3,3,3-tetrafluoropropene, and optionally 1,1,1,3,3-pentafluoropropane wherein the 2,3,3,3-tetrafluoropropene being present in an amount of 0.001 to 1.0%. A method of producing the fluoropropene, methods for using the fluoropropene and the composition formed are also disclosed.

A method for reducing 1,1,1,2,2-pentafluoropropane (HFC-245cb) in a trans-1,3,3,3-tetrafluoropropene (HFO-1234ze(E)) production process, including catalyst adjustment, temperature reduction, and shortening of contact time. The method comprises defluoridating 1,1,1,3,3-pentafluoropropane (HFC-245fa) with a catalyst mixture to produce a product mixture having HFO-1234ze(E) and HFC-245cb, and reducing the formation of HFC-245cb by incorporating a modified catalyst, using a lower temperature for defluoridation, or shortening the contact time for defluoridation.

The present invention discloses a heat transfer composition for replacing R123. The heat transfer composition comprises: 1% to 98% by weight of Z-1-chloro-2,3,3,3-tetrafluoropropene, 1% to 98% by weight of Z-1-chloro-2,3,3-trifluoropropene, and 1% to 30% by weight of 1,1,2,2,3-pentafluoropropane. The heat transfer composition is non-flammable, has a global warming potential (GWP) of less than 150, and an organic thermal conductivity (ODP) of approximately 0. The heat transfer composition of the present invention offers advantages such as environmental friendliness, excellent safety performance, and a high heating capacity per unit volume. It can be used as a heat transfer fluid in systems such as medium- and high-temperature heat pumps, chillers, heat pipes, and organic Rankine cycles.

Fluoroether 3-(difluoromethoxy)-1, 1, 1, 2, 2-pentafluoropropane ("HFE-347 mcf") can be used as a refrigerant and / or heat transfer composition, such as in a single-phase cooling system and a two-phase cooling system, and a method of heating and / or cooling an electronic component or apparatus includes providing a heat transfer fluid comprising at least about 10% by weight of 3-(difluoromethoxy)-1, 1, 1, 2, 2-pentafluoropropane, and transferring heat between the electronic component and the heat transfer fluid. According to the present invention, fluoroether 3-(difluoromethoxy)-1, 1, 1, 2, 2-pentafluoropropane can be synthesized by reacting 2, 2, 3, 3, 3-pentafluoro-1-propanol with chlorodifluoromethane (R-22), and a process for producing the fluoroether 3-(difluoromethoxy)-1, 1, 1, 2, 2-pentafluoropropane.

High boiling fluorinated by-products obtained from a manufacturing process of 1-chloro-3,3,3-trifluoropropene (HFO-1233zd) not only include components that can be used as a starting material or feedstock in the production of 1,1,1,3,3-pentafluoropropane (HFC-245fa), but also contain impurities that can be detrimental in the HFC-245fa process. A method of providing an improved composition from the high boiling by-products obtained from an HFO-1233zd manufacturing process reduces these impurities. The improved composition can be used as a starting material or feedstock for the production of HFC-245fa.

The invention relates to an integrated process for making fluorinated olefins. The present invention relates, at least in part, to a method for increasing the cost efficiency of a dehydrohalogenation production process of fluorinated olefins by recovering and recycling a spent dehydrohalogenation agent. In one aspect, the invention relates to dehydrohalogenating fluorinated alkanes (e.g., pentafluoropropane and / or hexafluoropropane) in the presence of a dehydrohalogenating agent to produce fluorinated alkenes (e.g., tetrafluoropropene and / or pentafluoropropene). Removal of the spent dehydrohalogenating agent from the reactor makes the organic matter readily separated from the dehydrohalogenating agent, the latter being recycled.

A fluoropropene composition comprising Z-1,3,3,3-tetrafluoropropene, E-1,3,3,3-tetrafluoropropene, 1,1,3,3,3-pentafluoropropene, 2,3,3,3-tetrafluoropropene, and optionally 1,1,1,3,3-pentafluoropropane wherein the 2,3,3,3-tetrafluoropropene being present in an amount of 0.00001 to 1.0%. A method of producing the fluoropropene, methods for using the fluoropropene and the composition formed are also disclosed.

Embodiments of the present disclosure are directed towards isocyanate-reactive compositions including a sorbitol-initiated polyether polyol, a high hydroxyl number glycerin-initiated polyether polyol, an ethylenediamine-initiated polyether polyol, a propylene glycol-initiated polyether polyol, a low hydroxyl number glycerin-initiated polyether polyol, pentafluoro propane, dichloromethane, wherein a combination of the pentafluoro propane and the dichloromethane is from 5 to 14 weight percent of the isocyanate-reactive composition based upon the total weight of the isocyanate-reactive composition, and water.

The present invention relates to an intelligent heat dissipation device for vehicle charging piles, aiming to effectively manage the heat generated during the charging process and achieve efficient energy utilization through intelligent temperature regulation and heat dissipation mechanisms. The device includes a multi-stage heat dissipation structure, an evaporative cooling mechanism, dynamic heat dissipation regulation, and a dual-channel temperature regulation system. It uses a step-by-step transfer to disperse the heat generated by the device body during the charging process, preventing overheating and extending the device life. Evaporation chamber one and evaporation chamber two are respectively filled with fluorinated liquid and pentafluoropropane to achieve efficient evaporative cooling. It can flexibly switch between heating and cooling modes according to the actual needs of the vehicle, utilize the heat generated by the charging pile, reduce the additional power consumption of vehicle heating or cooling, and particularly save significant energy during heating in cold climate conditions. The heat-conducting liquid circulation system manages the temperature of the charging cable to ensure it maintains an appropriate temperature during high-load charging, improving charging safety.

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.

A method for separating an azeotrope, belonging to the field of chemical engineering technology. The separation and purification method includes: adding an azeotrope of 1-chloro-3,3,3-trifluoropropene and 1,1,1,3,3-pentafluoropropane to an extractant for extraction; wherein, the extractant is selected from one or more of ethylene glycol, furfural, acetonitrile, and DMF. The separation method of the present invention destroys the azeotropic equilibrium between 1-chloro-3,3,3-trifluoropropene and 1,1,1,3,3-pentafluoropropane by adding an efficient, inexpensive and easily available extractant, so as to achieve the effective separation of the azeotrope of 1-chloro-3,3,3-trifluoropropene and 1,1,1,3,3-pentafluoropropane. The separated 1-chloro-3,3,3-trifluoropropene and 1,1,1,3,3-pentafluoropropane are introduced into a subsequent distillation system for distillation and purification, and finally two products of high-purity 1-chloro-3,3,3-trifluoropropene and 1,1,1,3,3-pentafluoropropane are obtained.

The application relates to the field of building board preparation, and particularly discloses a light thermal-insulation composite external wall board and a preparation method thereof, and a preparation method of the light thermal-insulation composite external wall board, which comprises the following steps: mixing raw materials of a thermal-insulation core material, extruding and foaming by injecting a foaming agent, and cooling and shaping to obtain the thermal-insulation core material; the foaming agent is carbon dioxide and / or 1,1,1,3,3-pentafluoropropane, the nucleating agent is talcum powder which is prepared by sequentially carrying out in-situ grafting and amidation reaction of amino silane and maleic anhydride after intercalation treatment; pouring a bottom layer of a surface layer cement-based light mortar in a mold, laying the thermal-insulation core material, pouring an upper layer of the surface layer cement-based light mortar, and preparing the light thermal-insulation composite external wall board through initial setting and maintenance. The foaming process is mild and controllable, and the nucleating agent cooperates to further ensure that the cells are uniform, fine and high in closed cell rate, so that the core layer is light in weight, high in thermal insulation, fireproof and durable.

The invention discloses carbon dioxide catalytic modified silica aerogel and a production method thereof, and relates to the technical field of production of building thermal insulation materials. The preparation method comprises the following steps: diluting water glass with water, dropwise adding the diluted water glass into a mixed solution of water and dilute nitric acid, dropwise adding dilute ammonia water to adjust the pH value, heating in a water bath, soaking in a sodium methylsilanolate aqueous solution, isopropanol and a dilute alkali solution, placing in a high-temperature and high-pressure reaction kettle, adding HMDZ, normal hexane and isopropanol, introducing carbon dioxide for modification, adding pentafluoropropane, heating to separate normal hexane, and cooling to room temperature. And drying to obtain the carbon dioxide catalytic modified silica aerogel. Carbon dioxide is introduced for modification, the situation that acid serves as a catalyst, the water content in a system is increased is avoided, excessive consumption of a modifier is reduced, meanwhile, the washing process is omitted, the acid and alkali resistance of equipment is reduced, the boiling point of pentafluoropropane is low, the flame retardant effect is achieved, and the preparation process is safer. The carbon dioxide catalytic modified silica aerogel disclosed by the invention has good hydrophobicity, low heat conductivity and low density.

A non-combustible aerosol cleaning composition is formulated with trans-1, 2 dichloroethylene, 1, 1, 1, 2, 2, 3, 4, 5, 5, 5-decafluoropentane, 1, 1, 1, 3, 3-pentafluoropropane, HFC-134a, and carbon dioxide. The aerosol cleaning composition is formulated for deep cleaning, high pressure, and high output cleaning applications for cleaning aeronautical parts, such as jet engines located outside of about 10 feet from the user.

Fluoroether 3-(difluoromethoxy)-1,1,1,2,2-pentafluoropropane ("HFE-347mcf") may be used as a refrigerant and / or heat transfer composition in single-phase and two-phase cooling systems, and a method for heating and / or cooling electronic components or devices comprises providing a heat transfer fluid containing at least about 10% by weight of 3-(difluoromethoxy)-1,1,1,2,2-pentafluoropropane, and transferring heat between the electronic components and the heat transfer fluid. Fluoroether 3-(difluoromethoxy)-1,1,1,2,2-pentafluoropropane can be synthesized by reacting 2,2,3,3,3-pentafluoro-1-propanol with chlorodifluoromethane (R-22).

The invention discloses a catalyst for synthesizing 2, 3, 3, 3-tetrafluoropropene and a preparation method and application thereof.The catalyst is composed of a carrier, CeF3 loaded on the carrier, active metal M1 and auxiliary metal M2, the carrier is MoC, the active metal M1 is precious metal, and the auxiliary metal M2 is any one of V, Fe, Nd, Pb, Cs and Pr; the catalyst comprises the following components in percentage by weight: 0.05 to 2 percent of active metal M1, 0.2 to 3 percent of auxiliary metal M2, 6 to 15 percent of CeF3 and the balance of carrier. The catalyst is applied to continuous catalytic synthesis of 2, 3, 3, 3-tetrafluoropropene from 1, 1, 1, 2, 3-pentafluoropropane, and has relatively good economic benefits and social benefits; the yield of the target product 2, 3, 3, 3-tetrafluoropropene is high, and the service life of the catalyst is long.

A refrigerant composition comprising E-1, 3, 3, 3-tetrafluoropropene, a hydrogen (chloro) fluorocarbon selected from the group consisting of 1, 1, 3, 3-tetrafluoro-2-propene, 1, 1, 1, 3, 3-pentafluoropropane, trans-1-chloro-3, 3, 3-trifluoropropene, and mixtures thereof, and a lubricant selected from the group consisting of polyol esters and polyalkylene glycols, where the hydrogen (chloro) fluorocarbon is based on the E-1, 3, 3, 3-tetrafluoropropene. A total amount of up to 1.0 wt%, based on the total weight of the 1, 1, 1, 3, 3-tetrafluoropropene and the hydrogen (chloro) fluorocarbon, is present in the composition.

The invention relates to an integrated process for making fluorinated olefins. The present invention relates, at least in part, to a method for increasing the cost efficiency of a dehydrohalogenation production process of fluorinated olefins by recovering and recycling a spent dehydrohalogenation agent. In one aspect, the invention relates to dehydrohalogenating fluorinated alkanes (e.g., pentafluoropropane and / or hexafluoropropane) in the presence of a dehydrohalogenating agent to produce fluorinated alkenes (e.g., tetrafluoropropene and / or pentafluoropropene). Removal of the spent dehydrohalogenating agent from the reactor makes the organic matter readily separated from the dehydrohalogenating agent, the latter being recycled.