Measurement and correlation of aqueous biphasic systems composed of alcohol (1-propanol/2-propanol/ tert -butanol) + (NH 4 ) 2 SO 4  + H 2 O at 298 K and a textile dye partition

Sanglard, Matheus Gomes; Farias, Fabiane Oliveira; Sosa, Filipe H. B.; Santos, Tâmisa Pires Machado dos; Igarashi‐Mafra, Luciana; Mafra, Marcos R.

doi:10.1016/j.fluid.2018.03.009

Cited by 23 publications

(21 citation statements)

References 41 publications

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“…All the systems, with exception of nicotine extraction applying ethanol–NaH 2 PO 4 , present high extraction efficiency values ( E %), up to 98.98%, indicating a high ability of the ethanol-based systems to be applied in the extraction process. It should be highlighted that alcohol-based ABSs present low viscosity, fast phase separation, and consequently short time of separation process, as previously observed by Sanglard et al…”

Section: Resultssupporting

confidence: 65%

“…It can be calculated from the following expression: As far as the difference between the top and bottom phases decrease, TLL starts to approach to zero and the system tends to a critical point. The critical point of each system was calculated as previously described in the literature . At this point, the composition and volume of both phases are equal…”

Section: Experimental Sectionmentioning

confidence: 99%

“…The systems composed by salt solution and hydrophilic organic solvents, such as alcohol–salt, have been of great interest because of their easy recovery and low environmental impact. In addition, their higher selectivity, lower viscosity, fast phase separation, large throughput and low cost when compared to a polymer-salt ABS highlight their value. − …”

Section: Introductionmentioning

confidence: 99%

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Salt Effect on Ethanol-Based Aqueous Biphasic Systems Applied to Alkaloids Partition: An Experimental and Theoretical Approach

et al. 2019

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Aqueous biphasic systems (ABSs) based on alcohol–salt are of significant interest because of their low cost and environmental impact, as well as their higher selectivity and fast phase segregation, when compared to a polymer–salt ABS. The salt effect was evaluated in ethanol-based aqueous biphasic systems using five different salts (NaH2PO4, K2HPO4, K3PO4, K2CO3, or K3C6H5O7) at 298.15 K and atmospheric pressure. The results suggest that both the cation and anion natures present an influence on liquid–liquid equilibrium (LLE). To describe the experimental LLE data, the nonrandom two-liquid model was used to adjust the experimental data, which showed a good fit (rmsd < 0.68%). The salt influence in ABSs and its partition ability was accounted by phase diagrams, as well as a partition study using nicotine and caffeine. Results have shown high partition yield and high selectivity.

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Section: Resultssupporting

confidence: 65%

Section: Experimental Sectionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Salt Effect on Ethanol-Based Aqueous Biphasic Systems Applied to Alkaloids Partition: An Experimental and Theoretical Approach

et al. 2019

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“…O aumento da quantidade de álcool na fase superior, reduziu a concentração de água nessa fase devido a sua migração para fase inferior. Os valores de ILA para os sistemas estudados apresentaram o mesmo comportamento observado em outros estudos (Lo et al, 2015;Sanglard et al, 2018), onde o aumento das quantidades de 2-propanol e/ou sal resultou em valores mais altos de ILA. No sistema com sulfato, o aumento da ILA elevou os valores de CLA refletindo o comportamento encontrado no estudo de Pimentel et al (2017).…”

Section: Resultsunclassified

“…Dentre estas técnicas, a que apresenta o melhor custo benefício é a extração líquido-líquido, sendo que a utilização de solventes orgânicos ou de custo elevado impossibilita sua larga aplicação. Neste cenário, surge a extração líquido-líquido realizada a partir de um sistema aquoso bifásico (SAB) que apresenta várias vantagens, como o menor custo, baixa toxicidade e a possibilidade de aplicação em grande escala (Sanglard et al, 2018).…”

Section: Introductionunclassified

Estudo Do Equilíbrio Líquido-Líquido De Sistemas Aquosos Bifásicos Compostos Por 2-Propanol + Sais De Sódio + Água

Julião¹,

Mendes²,

Amaral³

2019

Blucher Chemical Engineering Proceedings

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RESUMO-O equilíbrio líquido-líquido ternário dos sistemas constituídos por 2propanol + sulfato/nitrato/acetato de sódio + água foram mensurados a 298,15 K e 101,3 kPa. Os pontos binodais obtidos experimentalmente foram bem ajustados pelos modelos propostos por Mistry et al. e Merchuk et al. e se mostraram semelhantes aos encontrados na literatura. Através das equações de Othmer-Tobias e Bancroft, concluiu-se que os dados das linhas de amarração eram confiáveis devido aos baixos desvios padrões encontrados. Os sistemas com sulfato apresentaram duas fases muito aquosas, enquanto que os sistemas com nitrato e acetato originaram uma fase superior rica no álcool e uma fase inferior rica em sal e água. Este comportamento é interessante para uma separação entre o 2-propanol e a água usando uma extração líquido-líquido.

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Thermodynamics of Textile Dyes Partitioning in Alcohol‐Based Aqueous Two‐Phase Systems

et al. 2023

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The aim of this work was a complete thermodynamic study on the partitioning of Remazol Yellow l, Remazol Brilliant Blue, and Remazol Red dyes in isopropyl alcohol + sodium phosphate + water aqueous two‐phase systems at different temperatures. The free energy change of transfer, enthalpy change of transfer, and entropy change of transfer were evaluated. The effects of the structure of the dye, tie line length, and temperature on the partitioning were studied. The results indicate that these aqueous two‐phase systems have high capacity to extract the dyes from aqueous matrices to the organic phase of these systems and are an interesting alternative to effluent treatment process.

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Measurement and correlation of aqueous biphasic systems composed of alcohol (1-propanol/2-propanol/ tert -butanol) + (NH 4 ) 2 SO 4 + H 2 O at 298 K and a textile dye partition

Cited by 23 publications

References 41 publications

Salt Effect on Ethanol-Based Aqueous Biphasic Systems Applied to Alkaloids Partition: An Experimental and Theoretical Approach

Salt Effect on Ethanol-Based Aqueous Biphasic Systems Applied to Alkaloids Partition: An Experimental and Theoretical Approach

Estudo Do Equilíbrio Líquido-Líquido De Sistemas Aquosos Bifásicos Compostos Por 2-Propanol + Sais De Sódio + Água

Thermodynamics of Textile Dyes Partitioning in Alcohol‐Based Aqueous Two‐Phase Systems

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Measurement and correlation of aqueous biphasic systems composed of alcohol (1-propanol/2-propanol/ tert -butanol) + (NH 4 ) 2 SO 4 + H 2 O at 298 K and a textile dye partition

Cited by 23 publications

References 41 publications

Salt Effect on Ethanol-Based Aqueous Biphasic Systems Applied to Alkaloids Partition: An Experimental and Theoretical Approach

Salt Effect on Ethanol-Based Aqueous Biphasic Systems Applied to Alkaloids Partition: An Experimental and Theoretical Approach

Estudo Do Equilíbrio Líquido-Líquido De Sistemas Aquosos Bifásicos Compostos Por 2-Propanol + Sais De Sódio + Água

Thermodynamics of Textile Dyes Partitioning in Alcohol‐Based Aqueous Two‐Phase Systems

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Measurement and correlation of aqueous biphasic systems composed of alcohol (1-propanol/2-propanol/ tert -butanol) + (NH 4 ) 2 SO 4 + H 2 O at 298 K and a textile dye partition