Liquid-liquid equilibria for the systems triethylene glycol - toluene - heptane, propylene carbonate - toluene - heptane and propylene carbonate -o-xylene- heptane

Salem, Abu Bakr S. H.

doi:10.1016/0378-3812(93)87184-3

Cited by 35 publications

(23 citation statements)

References 5 publications

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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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Section: Introductionmentioning

confidence: 99%

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

2016

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“…The table also gives the total volumetric flow rates and the corresponding residence times and velocities of the system. LLE data for this system were directly used from the report published by Salem (1993). Comparison of extract phase compositions with LLE tie line data is shown in Figure 2 for a 1 mm PTFE channel and 0.2 mL/min flow rate.…”

Section: N-heptane + Toluene + Propylene Carbonate At 25 ºCmentioning

confidence: 99%

“…The percentage of co-solvent TTEG was chosen arbitrarily. PC has reasonable capacity but low selectivity (Salem, 1993). On the other hand, TTEG has high selectivity but low capacity (Saha, 1998).…”

Section: N-heptane+toluene+furfural and Synthetic Naphtha Reformate+(mentioning

confidence: 99%

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Liquid-Liquid Extraction of Aromatics From Hydrocarbon Mixtures in Capillaries

Kumar

Mohan

2018

Braz. J. Chem. Eng.

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An aromatics extraction study was conducted in capillaries of internal diameters in the range of 0.8 mm to 2 mm. The systems chosen for study were 'n-heptane + toluene + propylene carbonate', 'n-heptane + toluene + furfural' and 'synthetic naphtha reformate + (propylene carbonate + tetraethylene glycol)'. The aim of the work was to evaluate the feasibility of conducting aromatic separation in micro-capillaries and evaluate maximum efficiency. The results showed efficiencies ranging from 46.3 % to 97.3 %, depending upon the combination of the flow velocity, residence time and channel diameter. The effect of individual parameters on extraction efficiency was also isolated from the various combinations. Efficiency increased from 68 to 83 % as flow velocity increased from 0.11 to 0.96 cm/s, while residence time and channel diameter were fixed at 0.78 min and 2 mm, respectively. The samples collected from the capillary quickly separated into clear liquid layers , indicating short settling times.

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“…Awwad et al (1988) recommended -butyrolactone for aromatics extraction from paraffins. Salem (1993) reported the ternary data of systems containing aromatics, paraffins, and propylene carbonate solvent. Table 1 summarizes the capacities and selectivities of propylene carbonate and some other solvents.…”

Section: Introductionmentioning

confidence: 99%

Quaternary Liquid-Liquid Equilibrium of n-Heptane-Toluene-o-Xylene-Propylene Carbonate

Salem¹,

Hamad²,

Al-Naafa³

1994

Ind. Eng. Chem. Res.

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Liquid-liquid equilibria for the systems triethylene glycol - toluene - heptane, propylene carbonate - toluene - heptane and propylene carbonate -o-xylene- heptane

Cited by 35 publications

References 5 publications

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

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

Liquid-Liquid Extraction of Aromatics From Hydrocarbon Mixtures in Capillaries

Quaternary Liquid-Liquid Equilibrium of n-Heptane-Toluene-o-Xylene-Propylene Carbonate

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