Vapor–Liquid Equilibrium of Binary Components of the BrCF2COOCH3–CF3COOH–BrCF2COOH–CF3COOCH3 Quaternary System

Lupachev, Egor V.; Zakhlevniy, A. V.; Kvashnin, S. Ya.; Lotkhov, V. A.; Кулов, Н. Н.

doi:10.1134/s0040579518030119

Cited by 2 publications

(5 citation statements)

References 15 publications

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“…The value change of the relative volatility coefficient of components during the Rayleigh distillation process of methyl trifluoroacetate (MeTFA) and 2 , 2 , 2 ‐trifluoroacetic acid (TFA) mixture in the presence of N ‐methylpyrrolidonium trifluoroacetate ([HNMP] + [CF 3 COO] − ) at 99.2 kPa. 1—Without additional substances [ 9 ] and 2 — In the presence of [HNMP] + [CF 3 COO] − (Table 6).

x_{TFA}^{'} = \frac{x_{italicTFA}}{x_{TFA} + x_{MeTFA}}

…”

Section: Resultsmentioning

confidence: 99%

“…The TFA and NMP ([HNMP] + [CF 3 COO] À ) mixture distillation at T ≤ 230 C ) at 99.2 kPa. 1-Without additional substances [9] and 2-In the presence of [HNMP] + [CF 3 COO] À (Table 6). x 0 TFA ¼ xTFA xTFAþxMeTFA…”

Section: Discussionmentioning

confidence: 99%

“…The MeTFA‐TFA system has been taken as a basic binary mixture, which is complicated by the presence of an almost tangential azeotrope at atmospheric pressure. According to the literature, [ 9 ] the vapour–liquid equilibrium diagram of the MeTFA‐TFA is characterized by the difference between component boiling temperatures (∆ T =

T_{b}^{TFA} - T_{b}^{MeTFA}

) equal to 29.15°C and a small difference between the compositions of the equilibrium vapour and liquid phase in the area of high TFA concentrations.…”

Section: Methodsmentioning

confidence: 99%

“…Moreover, no similar studies with “mixed separation agents” can be found in the literature. Thus, this article is based on our previous work [ 9 ] discussing the phase profile of a quaternary mixture of fluorinated esters and acids within a reactive distillation process. In particular, our previous work [ 9 ] provides data on the vapour–liquid equilibrium in the binary system methyl trifluoroacetate (MeTFA [ 10 ] )— 2 , 2 , 2 ‐trifluoroacetic acid (TFA [ 11 ] ).…”

Section: Introductionmentioning

confidence: 99%

“…Thus, this article is based on our previous work [ 9 ] discussing the phase profile of a quaternary mixture of fluorinated esters and acids within a reactive distillation process. In particular, our previous work [ 9 ] provides data on the vapour–liquid equilibrium in the binary system methyl trifluoroacetate (MeTFA [ 10 ] )— 2 , 2 , 2 ‐trifluoroacetic acid (TFA [ 11 ] ). The combination of a Brønsted acid, such as TFA, and a Brønsted base, for example, lactam, is a subset of such ILs as protic ionic liquids (PILs).…”

Section: Introductionmentioning

confidence: 99%

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Protic ionic liquid—2,2,2‐trifluoroacetic acid—methyl trifluoroacetate mixture distillation process

et al. 2022

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The work provides experimental data of the methyl trifluoroacetate (MeTFA)-2,2,2-trifluoroacetic acid (TFA) mixture distillation process in the presence of N-Methyl-2-pyrrolidone (NMP) at atmospheric pressure (99.2 kPa) and within a temperature range of T ≤ 230 C. Forming PIL between TFA and NMP (methylpyrrolidonium trifluoroacetate [HNMP] + [CF 3 COO] À ) leads to a significant volatility increase of the MeTFA relative to TFA. The pure MeTFA was recovered from the MeTFA-TFA-[HNMP] + [CF 3 COO] À mixture in the quantity of 70% from the MeTFA initial mole charge; the total mole recovery was 100%. A significant result of the above experiment is that TFA mole recovery from the MeTFA-TFA-[HNMP] + [CF 3 COO] À mixture within a temperature range of T < 187 C exceeds 96%. The distillation of TFA and NMP mixture at T ≤ 230 C demonstrates strong binding of TFA anion that can be seen from the final liquid phase composition TFA/NMP ≈ 0.53/0.47. At the concentration and the temperature ranges under study, there is no NMP in the vapour phase.

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x_{TFA}^{'} = \frac{x_{italicTFA}}{x_{TFA} + x_{MeTFA}}

…”

Section: Resultsmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

T_{b}^{TFA} - T_{b}^{MeTFA}

) equal to 29.15°C and a small difference between the compositions of the equilibrium vapour and liquid phase in the area of high TFA concentrations.…”

Section: Methodsmentioning

confidence: 99%