Separation of azeotrope (2,2,3,3-tetrafluoro-1-propanol + water): Isobaric vapour-liquid phase equilibrium measurements and azeotropic distillation

Liquid-liquid phase equilibrium and interaction exploration for separation of azeotrope (2,2,3,3-tetrafluoro-1-propanol + water) with two imidazolium-based ionic liquids

“…Generally, it is essential to adopt some special distillation technologies to separate azeotropic mixtures, for instance, pressure-swing distillation [6,7], extractive distillation [8][9][10][11] and reactive distillation [12,13]. In order to separate the azeotrope of TFP and water, Shi et al adopted azeotropic distillation with the entrainers chloroform and p-xylene [14] and explored the process design and control strategies [15]. Li et al [16] applied extractive distillation to separate TFP and water with N-methyl pyrrolidone, N, N-dimethyl formamide and N-methyl formamide as the entrainers.…”

MEASUREMENTS AND THERMODYNAMIC MODELING OF VAPOR-LIQUID EQUILIBRIA FOR BINARY SYSTEMS OF ISOPROPYL CHLOROACETATE WITH CYCLOHEXANE, ISOPROPANOL AND BENZENE AT 101.3 kPa

“…To evaluate the non-ideality of the three binary systems, the excess Gibbs energy G E (Acevedo et al, 1988;Shi et al, 2017) was calculated as follows: The p i s can be calculated by the Wagner 25 equation (Forero and Velásquez, 2011;Gao et al, 2016b):…”

Process design, evaluation and control for separation of 2,2,3,3‐tetrafluoro‐1‐propanol and water by extractive distillation using ionic liquid 1‐ethyl‐3‐methylimidazolium acetate

“…Generally, for separating azeotropic mixtures, special separation technologies are usually considered, such as azeotropic distillation, 6 extractive distillation, [7][8][9] pressure-swing distillation, [10][11][12] and membrane technology. 13 To separate TFP from its aqueous solution, Shi et al 5,14 adopted azeotropic distillation to separate TFP and water with chloroform and p-xylene as azeotropic agents. Li et al 15 applied extractive distillation and selected high boiling solvents (N-methyl pyrrolidone, N-methyl formamide, and N, N-dimethyl formamide) as the entrainers to break the minimum azeotrope of TFP and water.…”

“…[27][28][29] In this paper, three extractive distillation processes with 1-ethyl-3-methylimidazolium acetate ([EMIM][Ac]) as a proper entrainer are designed based on the previous experimental work, which has shown that IL [EMIM][Ac] can effectively eliminate the azeotropic point of the mixture TFP and water. 5,30 To obtain high purity TFP and recycle [EMIM][Ac], three processes are optimized and compared by total annual cost (TAC), CO 2 emissions, and global energy consumption (GEC). A process is proposed by adjusting the temperature of the entrainer through the stages of stripper and the flow rate of air without a heat exchanger to save on operation costs.…”

“…The azeotropic composition is water/TFP 27.5/72.5 (wt%). 5 It is difficult to separate TFP with high purity by conventional distillation. Generally, for separating azeotropic mixtures, special separation technologies are usually considered, such as azeotropic distillation, 6 extractive distillation, [7][8][9] pressure-swing distillation, [10][11][12] and membrane technology.…”