37 results about "Trifluoroethane" patented technology

The production of HFO-1132, and in particular HFO-1132 E, may be produced from 1, 1, 2-trichloro-1, 2, 2-trifluoroethane (CFC-113), and the production of HFO-1132, and in particular HFO-1132 E, may be produced from 1, 1, 2-trichloro-1, 2, 2- In a first step, 1, 1, 2-trifluoroethane (HFC-143) is produced by hydrogenating 1, 1, 2-trichloro-1, 2, 2-trifluoroethane (CFC-113) by reacting with hydrogen in the presence of a catalyst to produce 1, 1, 2-trifluoroethane (HFC-143). The 1, 1, 2-trifluoroethane (HFC-143) may then be dehydrofluorinated in the presence of a catalyst to produce trans-1, 2-difluoroethylene (HFO-1132E) and / or cis-1, 2-difluoroethylene (HFO-1132Z). The cis-1, 2-difluoroethylene (HFO-1132Z) may then be isomerized to produce the trans-1, 2-difluoroethylene (HFO-1132E), and then the cis-1, 2-difluoroethylene (HFO-1132Z) may be isomerized to produce the cis-1, 2

Production of HFO-1132 and, in particular, HFO-1132E, may be produced from 1,1,2-trichloro-1,2,2-trifluoroethane (CFC-113) or CTFE. The present disclosure provides a non-catalytic method for producing trans-1,2-difluoroethylene (HFO-1132(E)), comprising: providing a reactant composition comprising cis-1,2-difluoroethylene (HFO-1132(Z)); and isomerizing the HFO-1132(Z) in an electric heater reactor or a tubular reactor at a temperature of from about 350°C to about 600°C to produce a product composition comprising HFO-1132(E).

An azeotrope or azeotrope-like composition consists essentially of an effective amount of 1-chloro-1, 1-difluoroethane (HCFC-142b) and 1, 1, 2-trifluoroethane (HFC-143), and a method for producing the azeotrope or azeotrope-like composition. Also disclosed are methods for separating azeotrope or azeotrope-like compositions and / or utilizing the same in extraction and pressure swing distillation in conjunction with methods of making 1, 1, 2-trifluoroethane (HFC-143).

A process includes providing a composition including E-1,2-difluoroethylene (HFO-E-1132), and Z-1,2-difluoroethylene (HFO-Z-1132), and separating the HFO-Z-1132 from the HFO-E-1132 by a separation process selected from extractive distillation of the composition, chemical absorption of the HFO-Z-1132 in the composition, and chemical reaction of the HFO-Z-1132 in the composition to provide a purified composition comprising the HFO-E-1132 and being free of or substantially free of HFO-Z-1132. In another aspect, the process includes distilling the HFO-E / Z-1132 composition to provide a first fraction including HFO-E-1132 and free of or substantially free of HFO-Z-1132 and a second fraction including a major amount of HFO-Z-1132 and a minor amount of HFO-E-1132, collecting the first fraction as a purified composition, converting the second fraction to 1,1,2-trifluoroethane, 1,2-dibromo-1,2-difluoroethane or 1,2-dichloro-1,2-difluoroethane, converting the 1,1,2-trifluoroethane, 1,2-dibromo-1,2-difluoroethane or 1,2-dichloro-1,2-difluoroethane to HFO-E / Z-1132, and recycling the HFO-E / Z-1132 for distillation.

A process includes providing a composition including E-1,2-difluoroethylene (HFO-E-1132), and Z-1,2-difluoroethylene (HFO-Z-1132), and separating the HFO-Z-1132 from the HFO-E-1132 by a separation process selected from extractive distillation of the composition, chemical absorption of the HFO-Z-1132 in the composition, and chemical reaction of the HFO-Z-1132 in the composition to provide a purified composition comprising the HFO-E-1132 and being free of or substantially free of HFO-Z-1132. In another aspect, the process includes distilling the HFO-E / Z-1132 composition to provide a first fraction including HFO-E-1132 and free of or substantially free of HFO-Z-1132 and a second fraction including a major amount of HFO-Z-1132 and a minor amount of HFO-E-1132, collecting the first fraction as a purified composition, converting the second fraction to 1,1,2-trifluoroethane, 1,2-dibromo-1,2-difluoroethane or 1,2-dichloro-1,2-difluoroethane, converting the 1,1,2-trifluoroethane, 1,2-dibromo-1,2-difluoroethane or 1,2-dichloro-1,2-difluoroethane to HFO-E / Z-1132, and recycling the HFO-E / Z-1132 for distillation.

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.

In some embodiments, HFO-132, and in particular HFO-1132E, may be produced from 1, 1, 2-trichloro-1, 2, 2-trifluoroethane (CFC-113), and in particular HFO-1132E may be produced from 1, 1, 2-trichloro-1, 2, 2-trifluoroethane (CFC-113). In a first step, 1, 1, 2-trifluoroethane (HFC-143) is produced by hydrogenating 1, 1, 2-trichloro-1, 2, 2-trifluoroethane (CFC-113) by reacting with hydrogen in the presence of a catalyst to produce 1, 1, 2-trifluoroethane (HFC-143). The highly exothermic hydrogenation step may be moderated by diluting the catalyst and / or by diluting the 1, 1, 2-trichloro-1, 2, 2-trifluoroethane (CFC-113) feedstock. The 1, 1, 2-trifluoroethane (HFC-143) may then be dehydrofluorinated in the presence of a catalyst to produce trans-1, 2-difluoroethylene (HFO-1132E) and / or cis-1, 2-difluoroethylene (HFO-1132Z). The cis-1, 2-difluoroethylene (HFO-1132Z) may then be isomerized to produce a trans-1, 2-difluoroethylene (HFO-1132E), and then, the cis-1, 2-difluoroethylene (HFO-1132E) may be isomerized.

Production of HFO-1132 and, in particular, HFO-1132E, is produced from chlorotrifluoroethylene (CTFE) and / or trifluoroethylene (HFO-1123). In a first step, 1,1,2-trifluoroethane (HFC-143) is produced by hydrogenating chlorotrifluoroethylene (CTFE) and / or trifluoroethylene (HFO-1123) by reaction with hydrogen in the presence of a catalyst at a temperature of between about 75°C and about 225°C. The 1,1,2-trifluoroethane (HFC-143) may then be dehydrohalogenated in the presence of a catalyst to produce trans-A,2-difluoroethylene (HFO-1132E) and cis-1,2-difluoroethylene (HFO-1132Z). The cis-1,2-difluoroethylene (HFO-1132Z) may then be isomerized to produce trans-A,2-difluoroethylene (HFO-1132E).

HFO-1132, particularly HFO-1132E, can be produced from 1,1,2-trichloro-1,2,2-trifluoroethane (CFC-113). In the first step, 1,1,2-trifluoroethane (HFC-143) is produced by hydrogenating 1,1,2-trichloro-1,2,2-trifluoroethane (CFC-113) in the presence of a catalyst for producing 1,1,2-trifluoroethane (HFC-143). Then, 1,1,2-trifluoroethane (HFC-143) can be dehydrofluorinated in the presence of a catalyst to produce trans-1,2-difluoroethylene (HFO-1132E) and / or cis-1,2-difluoroethylene (HFO-1132Z). Next, cis-1,2-difluoroethylene (HFO-1132Z) can be isomerized to produce trans-1,2-difluoroethylene (HFO-1132E).

The invention discloses a preparation method of 1, 1, 2-trifluoroethane, and belongs to the field of fluorine-containing alkane preparation. According to the method, 1, 1-difluoro-2-chloroethane and anhydrous hydrogen fluoride are used as raw materials, iron powder is creatively used as a catalyst, and the pollution problem of a traditional chromium-based catalyst is solved by optimizing reaction conditions. The method is characterized in that the iron powder catalyst is subjected to organic solvent washing, vacuum drying and reduction activation pretreatment in the hydrogen atmosphere, and the catalytic efficiency is remarkably improved. Through a system purification process and a raw material circulation mechanism, the effects that the highest conversion rate of R142 is 75.28% and the highest selectivity of R143 is 91.83% are achieved, the method has the outstanding advantages of being environmentally friendly, low in cost and easy to industrialize, and a reliable scheme is provided for clean production of 1, 1, 2-trifluoroethane.

An azeotrope or azeotrope-like composition consists essentially of an effective amount of 1-chloro-1, 1, 2-trifluoroethane (HCFC-133b) and 1, 1, 2-trifluoroethane (HFC-143), and a method for preparing the azeotrope or azeotrope-like composition. Also disclosed are methods for separating azeotrope or azeotrope-like compositions and / or utilizing the same in extraction and pressure swing distillation in conjunction with methods of making 1, 1, 2-trifluoroethane (HFC-143).

An object of the present disclosure is to provide a method for producing HCFC-142, which is a target product, with high yield and high efficiency, by preventing the decomposition of starting materials, such as HCC-140 and HCO-1130. A method for producing HCFC-142, comprising bringing a chlorine-containing compound into contact with hydrogen fluoride in the presence of a stabilizer to perform at least one fluorination reaction, thus obtaining a reaction gas containing HCFC-142, hydrogen chloride, and hydrogen fluoride.

An azeotrope or azeotrope-like composition consisting essentially of effective amounts of 1,1,2-trifluoroethane (HFC-143) and hydrogen fluoride (HF). Methods for separating the azeotrope or azeotrope-like composition and / or exploiting the composition are also disclosed in connection with methods of manufacturing 1,1,2-trifluoroethane (HFC-143).

The invention discloses a method for removing 1, 1, 1-trifluoroethane in hexafluoroethane by an adsorption method, which comprises the following steps: S1, screening an adsorbent, and modifying the adsorbent to obtain a modified adsorbent; s2, filling an adsorption column with the modified adsorbent to form an adsorption bed layer, introducing hexafluoroethane raw material gas containing 1, 1, 1-trifluoroethane impurities from the bottom of the adsorption column at a certain air speed, selectively adsorbing the 1, 1, 1-trifluoroethane by the adsorbent in the adsorption column, and enabling the hexafluoroethane to flow out from the top of the adsorption column to realize separation of the hexafluoroethane and the 1, 1, 1-trifluoroethane, the high-purity hexafluoroethane is obtained. According to the method, the proper adsorbent is screened and specifically modified, so that the adsorption selectivity and the adsorption capacity of the adsorbent on the 1, 1, 1-trifluoroethane impurity in the hexafluoroethane are remarkably improved, and the content of the 1, 1, 1-trifluoroethane impurity in the hexafluoroethane can be effectively reduced to an extremely low level.

A novel composition comprising HFC-143 is provided.This invention relates to a composition comprising a refrigerant, wherein the refrigerant comprises 1,1,2-trifluoroethane (HFC-143), and at least one compound selected from the group consisting of 1-chloro-1,2,2-trifluoroethane (HCFC-133), 1-chloro-1,1,2-trifluoroethane (HCFC-133b), and 1-chloro-2-fluoroethylene (HCFO-1131).

Production of HFO-1132 and, in particular, HFO-1132E, may be produced from 1,1,2-trichloro-1,2,2-trifluoroethane (CFC-113) or CTFE. The present disclosure provides a non-catalytic method for producing trans-1,2-difluoroethylene (HFO-1132(E)), comprising: providing a reactant composition comprising cis-1,2-difluoroethylene (HFO-1132(Z)); and isomerizing the HFO-1132(Z) in an electric heater reactor or a tubular reactor at a temperature of from about 350° C. to about 600° C. to produce a product composition comprising HFO-1132(E).

Provided are a composition and application thereof, the composition including trifluoroethylene, and further including 1,1,1-trifluoroethane and 1,1,3,3,3-pentafluoropropene, but not including 1-chloro-2,2-difluoroethylene, (E)-1-chloro-1,2-difluoroethylene, and (Z)-1-chloro-1,2-difluoroethylene, in which a content of the 1,1,1-trifluoroethane is 0.1% by mass or less with respect to a total amount of the composition, and a content of the 1,1,3,3,3-pentafluoropropene is 0.5% by mass or less with respect to a total amount of the composition.

An azeotropic or azeotropic-like composition essentially consisting of effective amounts of 1,1,2-trichloro-1,2,2-trifluoroethane (CFC-113) and 1,1,2-trifluoroethane (HFC-143). Methods for separating the azeotropic or azeotropic-like composition and / or utilizing the composition in extraction and pressure swing distillation are also disclosed in connection with a method for producing 1,1,2-trifluoroethane (HFC-143).

An azeotrope or azeotrope-like composition consisting essentially of effective amounts of 1,1,2-trifluoroethane (HFC-143) and hydrogen fluoride (HF). Methods for separating the azeotrope or azeotrope-like composition and / or exploiting the composition are also disclosed in connection with methods of manufacturing 1,1,2-trifluoroethane (HFC-143).

The application discloses a method for coupling production of 1,1,2-trifluoroethane and acetylene to prepare 1,2-difluoroethylene and fluoroethylene, which comprises the following steps: under the action of a coupling catalyst, raw material 1,1,2-trifluoroethane is subjected to a dehydrofluorination reaction to obtain 1,2-difluoroethylene, and by-product hydrogen fluoride is subjected to an addition reaction with raw material acetylene to obtain fluoroethylene; the coupling catalyst comprises a first component A, a second component B and a carrier M, the first component A is a metal fluoride or a metal salt, and the second component B is a metal element; the metal in the first component A is selected from one or a combination of at least two of Al, Fe, Ni, Cu, Zn or Mn; and the second component B is selected from one or a combination of at least two of Pd, Ru, Pt, Ir, Ag or a rare earth metal. The method realizes resource utilization of raw materials and by-products, has high selectivity of target products, and solves the problems of the use of existing industrial by-product HFC-143 and the high energy consumption and large amount of waste of the catalytic dehydrofluorination reaction of the by-product HFC-143.

An azeotrope or azeotrope-like composition consists essentially of an effective amount of 1, 2-dichloro-1, 1, 2-trifluoroethane (HCFC-123a) and 1-chloro-1, 2-difluoroethane (HCFC-142a), and a method for producing the azeotrope or azeotrope-like composition. Also disclosed are methods for separating azeotrope or azeotrope-like compositions and / or utilizing the same in extraction and pressure swing distillation in conjunction with methods of making 1, 1, 2-trifluoroethane (HFC-143).

In the first step reaction for producing 1,1,2-trifluoroethane (HFC-143) from 1,1,2-trichloro-1,2,2-trifluoroethane (CFC-113) as part of the overall process for producing trans-A,2-difluoroethylene (HFO-1132E), several intermediates and / or byproducts are formed, some of which can be considered desirable and others of which can be considered undesirable. The overall reaction process and / or specific reaction conditions for producing 1,1,2-trifluoroethane (HFC-143) from 1,1,2-trichloro-1,2,2-trifluoroethane (CFC-113) can be selectively adjusted, such as with catalyst conditioning and / or with inert gas dilution of the reactants, to effectively convert the desired intermediates to the desired product 1,1,2-trifluoroethane (HFC-143) and / or to minimize the formation of undesirable byproducts.

An azeotropic or azeotropic-like composition comprising an effective amount of 1,1,2-trichloro-1,2,2-trifluoroethane (CFC-113) and 1-chloro-1,2-difluoroethane (HCFC-142a). Methods for separating the azeotropic or azeotropic-like composition and / or utilizing the composition in extraction and pressure swing distillation are also disclosed in connection with a method for producing 1,1,2-trifluoroethane (HFC-143).

An azeotrope or azeotrope-like composition consists essentially of an effective amount of 1, 1, 2-trichloro-1, 2, 2-trifluoroethane (CFC-113) and 1-chloro-1, 2-difluoroethane (HCFC-142a), and a method for producing the azeotrope or azeotrope-like composition. Also disclosed are methods for separating azeotrope or azeotrope-like compositions and / or utilizing the same in extraction and pressure swing distillation in conjunction with methods of making 1, 1, 2-trifluoroethane (HFC-143).

An azeotropic or azeotropic-like composition essentially consisting of effective amounts of 1-chloro-1,1-difluoroethane (HCFC-142b) and 1,1,2-trifluoroethane (HFC-143). Methods for separating the azeotropic or azeotropic-like composition and / or utilizing the composition in extraction and pressure swing distillation are also disclosed in connection with a method for producing 1,1,2-trifluoroethane (HFC-143).

A process for producing (Z)-1,1,1,4,4,4-hexafluoro-2-butene (Z-1336mzz) is described. The process uses readily available halogenated starting materials, including 1,1,1-trichloro-2,2,2-trifluoroethane (CFC-113a) and carbon tetrachloride.

An azeotrope or azeotrope-like composition consists essentially of an effective amount of 1, 1, 2-trichloro-1, 2, 2-trifluoroethane (CFC-113) and of a 1, 1, 2-trifluoroethane (HFC-143). Also disclosed are methods for separating azeotrope or azeotrope-like compositions and / or utilizing the same in extraction and pressure swing distillation in conjunction with methods of making 1, 1, 2-trifluoroethane (HFC-143).