Refractometry determination of the hydration number of ions in diluted aqueous solutions of magnesium sulfate

Масимов, Э. А.; Abbasov, H. F.

doi:10.1134/s003602441203020x

Cited by 12 publications

(7 citation statements)

References 2 publications

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“…Recently, we have developed a method for determining the total effective hydration numbers of electrolytes, based on a new relative viscosity model of aqueous electrolyte solutions, [34] the results of which are in good agreement with the literature data [35–38] . According to this model electrolyte solutions can be considered as two‐phase systems, in which the “free” dispersion medium – water (that part that is not enclosed within the hydration of ions) actually determines their viscosity.…”

Section: Methodssupporting

confidence: 62%

“…Recently, we have developed a method for determining the total effective hydration numbers of electrolytes, based on a new relative viscosity model of aqueous electrolyte solutions, [34] the results of which are in good agreement with the literature data. [35][36][37][38] According to this model electrolyte solutions can be considered as two-phase systems, in which the "free" dispersion medium -water (that part that is not enclosed within the hydration of ions) actually determines their viscosity. This method can also be applied in the case of dilute aqueous solutions of PEG to determine the effective hydration numbers of macromolecules, if it is assumed that the polymer coil in water has a spherical shape.…”

Section: Methodsmentioning

confidence: 99%

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Hydration Numbers of Polyethylene Glycols Based on a New Viscosity Model

Abbasov

2023

ChemistrySelect

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Due to the high solubility in water and the structural compatibility of polyethylene glycol with water molecules, it is a good model system for studying the mechanisms of interaction between water and biopolymers. The behavior of biopolymers in living organisms strongly depends on the hydration of macromolecules in the aquatic environment. In this work the effective hydration numbers of polyethylene glycols are determined using a new viscosity model developed for electrolytes and experimental data on the viscosity of dilute aqueous solutions of polyethylene glycols (300–35000). The calculated hydration numbers are in good agreement with the literature data and increase with increasing molecular mass of polyethylene glycol: as the molecular mass increases, starting from a molecular mass of 1000, the chain begins to fold in on itself, forming segment‐segment interactions, trapping additional, more loosely bound water between the segments. Based on the dependence of the intrinsic viscosity on the molecular mass according to the Mark‐Houwink equation, it is shown that PEGs are the flexible polymers and highly soluble in water.

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Section: Methodssupporting

confidence: 62%

“…Recently, we have developed a method for determining the total effective hydration numbers of electrolytes, based on a new relative viscosity model of aqueous electrolyte solutions, [34] the results of which are in good agreement with the literature data. [35][36][37][38] According to this model electrolyte solutions can be considered as two-phase systems, in which the "free" dispersion medium -water (that part that is not enclosed within the hydration of ions) actually determines their viscosity. This method can also be applied in the case of dilute aqueous solutions of PEG to determine the effective hydration numbers of macromolecules, if it is assumed that the polymer coil in water has a spherical shape.…”

Section: Methodsmentioning

confidence: 99%

Hydration Numbers of Polyethylene Glycols Based on a New Viscosity Model

Abbasov

2023

ChemistrySelect

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“…A new approach for the mechanism of action of nanoparticles on the formation, leading to an increase in oil production, is proposed. вая электростатическое отталкивание между глинистыми частицами и нефтью [11,12]. Как только силы отталкивания превышают силы притяжения через многовалентные катионные мостики, связь между нефтью и частицами глины разрывается, и частицы нефти могут быть десорбированы с поверхности глины.…”

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Enhanced oil recovery mechanism with nanofluid injection

Suleimanov¹,

Abbasov²

2022

SOCAR Proceedings

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The development and application of enhanced oil recovery technologies using nanofluids have been observed in last decade. It was found that the use of these reagents leads to the wettability alteration of the pore walls of the rock, an interfacial tension reduction, a decrease in oil viscosity, and an increase in the disjoining pressure. This paper presents the results of studying the displacement of residual oil on homogeneous quartz sandstone using the nanofluids, obtained by peptizing the sediments in a mixture of seawater with calcium and magnesium salts. Nitric and organic acids were used as peptizing agents. When using the developed nanofluids, an increase in oil production by 15-20% was achieved in comparison with seawater. A new approach for the mechanism of action of nanoparticles on the formation, leading to an increase in oil production, is proposed. Keywords: oil recovery; displacement efficiency; nanofluid; peptization; wettability alteration; interfacial tension.

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“…In Masimov and Abbasov (2012), after some mathematical transformations for the sum of hydration numbers of dissociated ions, the following expression was obtained:…”

Section: Introductionmentioning

confidence: 99%

Investigation of the Influence of Polyvinyl Pyrrolidone (Pvp) on Hydration Processes in Electrolytes

Bagirova

2024

NMCA

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The paper investigates the effect of polyvinylpyrrolidone (PVP) on the sum of the hydration numbers of anions and cations of salts KJ and К2SO4. The sum of hydration numbers was determined by the refractometric method. The data obtained show that the presence of the polymer in the electrolyte solution reduces the value of h,+ h2 which is associated with competition between polymer molecules and ions during the hydration process.

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Refractometry determination of the hydration number of ions in diluted aqueous solutions of magnesium sulfate

Cited by 12 publications

References 2 publications

Hydration Numbers of Polyethylene Glycols Based on a New Viscosity Model

Hydration Numbers of Polyethylene Glycols Based on a New Viscosity Model

Enhanced oil recovery mechanism with nanofluid injection

Investigation of the Influence of Polyvinyl Pyrrolidone (Pvp) on Hydration Processes in Electrolytes

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