Effect of inorganic additives on solutions of nonionic surfactantsVII. Cloud point shift values of individual ions

Schott, Hans; Royce, Alan E.; Han, Suk Kyu

doi:10.1016/s0021-9797(84)80026-0

Cited by 40 publications

(31 citation statements)

References 12 publications

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“…It is well known that electrolytes reduce solubility of organic compounds in water by the salting-out phenomenon [28]. This effect depends mainly on the nature of the electrolyte anion [29].…”

Section: Effect Of Electrolyte Anions On the Cloud Pointmentioning

confidence: 99%

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Cloud point extraction of phenol and benzyl alcohol from aqueous stream

Haddou

Canselier

Gourdon

2006

Separation and Purification Technology

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Two-aqueous phase extraction of phenol and benzyl alcohol as a solute from their aqueous solutions was investigated using polyethoxylated alcohols (CiEj) as a biodegradable non-ionic surfactant. First, the phase diagrams of the binary systems, water-surfactant (Oxo-C 10 E 3 and Oxo-C 13 E 9 ), and the pseudo-binary systems, water-surfactant with a constant concentration of solute was determined. The effect of sodium chloride and sodium sulphate on water-surfactant systems were studied. According to the given surfactants concentrations and temperatures, the extraction results were expressed by the following four parameters, percentage of extracted solute, E, which reached 95 and 90% for phenol and benzyl alcohol, respectively, residual concentrations of solute, X s,w , and the surfactant, X t,w , in the dilute phase and volume fraction of the coacervate at the equilibrium condition, φ c . The values of these parameters were determined by an analyzing central composite designs. After the first extraction process, phenol and benzyl alcohol concentrations in the effluent were reduced about ten times for the first and four times for the second, correspondingly.

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Section: Effect Of Electrolyte Anions On the Cloud Pointmentioning

confidence: 99%

“…2. The cloud point lowering of a C 13 E 9 solution is shown to be linear for NaCl and Na 2 SO 4 concentrations [19,[28][29][30]. From Fig.…”

Section: Effect Of Electrolyte Anions On the Cloud Pointmentioning

confidence: 99%

Cloud point extraction of phenol and benzyl alcohol from aqueous stream

Haddou

Canselier

Gourdon

2006

Separation and Purification Technology

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“…According to the affinity between the reservoir rock surface and water and oil, the reservoir wetting property is divided into water wetting, oil wetting, neutral wetting, and subwetting. Reservoir wettability is the main factor to control the flow and distribution of fluid in reservoirs [21]. Therefore, the study of reservoir wettability is of great significance to the development of oil field and the final recovery rate of crude oil [22].…”

Section: Contact Anglementioning

confidence: 99%

Enhancement of the Wettability and Lubrication of Shale Rock via Nanoemulsions

et al. 2017

International Journal of Polymer Science

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Nanoemulsions have been widely used as additives for drilling fluids in recent years. With the development of nanotechnology, multifunctional nanomaterials have been added to nanoemulsions. The improvement of wettability of the surfaces, alteration of oil-wet on shale rock surfaces, and environmentally friendly conditions are considered as the future development directions of nanoemulsions. In this work, a novel nanoemulsion was prepared by using hydrocarbon-based polyoxyethylene ether, oil (hydrocarbon), distilled water, and formation crude oil as the main raw materials. The shale rocks before and after immersion with as-prepared nanoemulsion were characterized by contact angle measurement, atomic force microscope (AFM), and Fourier transform infrared spectroscopy (FTIR). It is clearly observed that the nanoemulsion greatly improved the wettability of the sandstone and rock surface by forming a layer of active agent film on the surface of the rock. The as-prepared nanoemulsion had good ability to curb the anticollapse and lubricate and protect the oil and gas layer.

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“…Considering the hydrolysis molar ratio H 2 O/TM ~10, interactions of the cations with the ethylene oxide block of P123 are expected to occur by hydrogen bonding with the oxo/hydroxo/aquo ligands of the hydrolyzed metallic cations, as described by Crepaldi et al [4] for VO x thin films (see Scheme 1 in [4]). Li + has a much lower nominal charge than the nominally 4+ or 5+ Ti, Nb and V ions, but experiments by Ganguly et al [8] and Schott et al [9] have demonstrated that complexation occurs between hydrated Li + and PEO chains in aqueous solutions, contrary to the case of larger +1-ions such as Na + or K + . Hydrated lithium salts were also found to be able to form lyotropic liquid-crystalline mesophases with a nonionic surfactant containing a PEO block [26].…”

Section: Inorganic Networkmentioning

confidence: 99%

“…This latter approach used to be disregarded due to postulated difficulties concerning the condensation of the inorganic network and the interactions of the transition metal and the lithium ions with the ethylene oxide block of the surfactant [4][5][6][7][8][9]. However, Haetge et al [10] have recently reported the synthesis of Li 4 Ti 5 O 12 mesoporous thin films by an EISA route.…”

Section: Introductionmentioning

confidence: 99%

Lithium transition metal (Ti, Nb, V) oxide mesoporous thin films: Contrasting results when attempting direct synthesis by evaporation-induced self assembly

Caes

Malherbe

Arrebola

et al. 2013

Microporous and Mesoporous Materials

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This work investigates the possibility to prepare mesoporous thin films of Li-Ti, Li-Nb, LiNb-V and Li-V oxides through a direct sol-gel EISA route by dissolving a lithium salt in the precursor solution. Experimental conditions involve a hydrolysis molar ratio H 2 O/TM ~10 (TM = Ti,Nb,V) and the common Pluronic structuring agent P123 (EO 20 -PO 70 -EO 20 ). Systematic formation of lithium-containing oxides as first-crystallizing phases points to a significant intermixture of lithium and transition metal ions in the inorganic network. In the case of Ti-based and Nb-based oxide films, addition of lithium to the precursor solution is compatible with the formation of amorphous mesoporous films at 350°C. On the contrary, addition of lithium has a detrimental effect on the notoriously difficult formation of vanadium-based mesostructured films: even when replacing half of the vanadium by niobium as a stabilizer, formation of mesostructured films has not been possible in the investigated range of experimental conditions.

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Effect of inorganic additives on solutions of nonionic surfactantsVII. Cloud point shift values of individual ions

Cited by 40 publications

References 12 publications

Cloud point extraction of phenol and benzyl alcohol from aqueous stream

Cloud point extraction of phenol and benzyl alcohol from aqueous stream

Enhancement of the Wettability and Lubrication of Shale Rock via Nanoemulsions

Lithium transition metal (Ti, Nb, V) oxide mesoporous thin films: Contrasting results when attempting direct synthesis by evaporation-induced self assembly

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