Phase Equilibria of the Cyclohexane-Toluene-Sulfolane and Hexane-Toluene-Sulfolane Ternary Systems

Cassell, George W.; Hassan, Mohamed M.; Junes, Anthony L.

doi:10.1080/00986448908940358

Cited by 26 publications

(33 citation statements)

References 8 publications

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“…For the NRTL model, the third nonrandomness parameter, R ij , was set to a value of 0.2 (Cassell et al, 1989c). The parameters calculated are shown in Tables 4-6, together with the root-mean-square deviation (rmsd), which is defined as As can be seen from Tables 4-6, the calculation based on both the UNIQUAC and the NRTL models gave good representation of the tie-line data for these systems.…”

Section: Resultsmentioning

confidence: 99%

Liquid−Liquid Equilibria of the Ternary Systems Dodecane + Butylbenzene + Sulfolane, Dodecane + 1,4-Diisopropylbenzene + Sulfolane, and Dodecane + Octylbenzene + Sulfolane

and

Lin

1999

J. Chem. Eng. Data

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Liquid-liquid equilibria of the ternary systems dodecane + butylbenzene + sulfolane, dodecane + 1,4-diisopropylbenzene + sulfolane, and dodecane + octylbenzene + sulfolane have been determined at the temperatures of 323.15 K, 348.15 K, and 373.15 K. The tie line data were correlated with the wellknown NRTL and UNIQUAC models. The experimental data were filled in the UNIQUAC equation better than in the NRTL equation; the average root-mean-square deviations phase composition error was 0.3215 for UNIQUAC compared to 0.4520 for NRTL.

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Section: Resultsmentioning

confidence: 99%

Liquid−Liquid Equilibria of the Ternary Systems Dodecane + Butylbenzene + Sulfolane, Dodecane + 1,4-Diisopropylbenzene + Sulfolane, and Dodecane + Octylbenzene + Sulfolane

and

Lin

1999

J. Chem. Eng. Data

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“…The main solvents reported in the literature for aliphatic–aromatic liquid–liquid extraction, which have also been used in industrial separations, are sulfolane − and glycols, ,,− but many compounds have been tested for application in aliphatic–aromatic separations, including dimethyl sulfoxide, , ethylene and propylene carbonate, ,,− N -methylpyrrolidone, − N -formylmorpholine, ,,− and dimethylformamide, among others. The ternary aliphatic + aromatic + solvent systems, with compositional analysis, distribution factors, and selectivities, are detailed in each study, which is useful for performance comparisons among different compound combinations.…”

Section: Introductionmentioning

confidence: 99%

Comparison of Ionic Liquids to Conventional Organic Solvents for Extraction of Aromatics from Aliphatics

2016

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Commonly used solvents for separation of aromatics from aliphatics using liquid−liquid extraction are reviewed in terms of their physical properties and separation performance. The experimental liquid− liquid measurements for conventional solvents are contrasted with the phase behavior when using an ionic liquid as the extracting component. For comparison purposes, ternary systems of heptane + toluene + extraction solvent are used as representative mixtures, where sulfolane is the main organic extraction solvent discussed. Since ionic liquid properties are drastically changed by changing the anion, comparisons are performed for 1ethyl-3-methylimidazolium based ionic liquids using different anions. Ionic liquids containing cyano-substituted and bis(trifluoromethylsulfonyl)imide anions provide good selectivities and distribution ratios. On the basis of the phase behavior and capacities, as well as their relatively low viscosities, they appear to be competitive alternatives to organic solvents.

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“…This process used diethylene and dipropylene glycol as the solvent with triethylene and tetraethylene glycol later adopted due to superior solvent performance. Since the early 1960s, the sulfolane process became more commonly used due to the observation that the solvent (sulfolane − , ) demonstrated improved solvent characteristics. Other organic chemicals were then studied in the following decades as potential solvents such as 1-methylpyrrolidin-2-one − (NMP), morpholine-4-carbaldehyde − (NFM), N , N -dimethylmethanamide (DMF), dimethyl sulfoxide (DMSO), and propylene carbonate …”

Section: Introductionmentioning

confidence: 99%

Identification and Screening of Potential Organic Solvents for the Liquid–Liquid Extraction of Aromatics

Brijmohan

Moodley

Narasigadu

2021

Org. Process Res. Dev.

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There is increasing focus on the replacement of commonly used solvents in the liquid−liquid extraction of aromatics with solvents that result in improved process economics as well as reduced risk in terms of health, safety, and environment. In this work, a selection of organic chemicals are proposed for further study as replacement solvents that meet the technological requirements for the process of aromatics extraction from alkanes and have not been conventionally considered previously for this application. There were 52,654 organic chemicals screened with the use of a search algorithm based on the process requirements in terms of physical properties, capacity, selectivity, and performance index. Nine organic chemicals were identified (not being previously considered) that met all the criteria imposed by the search algorithm. A risk assessment further screened the identified chemicals, filtering out the potential solvents with adverse impacts on health, safety, and environment. Process designs were developed with the use of ASPEN plus in order to ascertain the effects of solvent choice on process economics via the use of total annual costs. The screening process in this work produced significant insights due to its holistic approach. The incorporation of factors such as solvent price, solvent loss, utilities, capital costs, health, and environmental impact showed that several of the solvents identified may be sustainable and cost-effective alternatives to conventionally used solvents. This highlights the need for a robust and broad perspective in considering the impact of solvent choice.

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Phase Equilibria of the Cyclohexane-Toluene-Sulfolane and Hexane-Toluene-Sulfolane Ternary Systems

Cited by 26 publications

References 8 publications

Liquid−Liquid Equilibria of the Ternary Systems Dodecane + Butylbenzene + Sulfolane, Dodecane + 1,4-Diisopropylbenzene + Sulfolane, and Dodecane + Octylbenzene + Sulfolane

Liquid−Liquid Equilibria of the Ternary Systems Dodecane + Butylbenzene + Sulfolane, Dodecane + 1,4-Diisopropylbenzene + Sulfolane, and Dodecane + Octylbenzene + Sulfolane

Comparison of Ionic Liquids to Conventional Organic Solvents for Extraction of Aromatics from Aliphatics

Identification and Screening of Potential Organic Solvents for the Liquid–Liquid Extraction of Aromatics

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