Colloids and Surfaces A: Physicochemical and Engineering Aspects, Nov 1, 2021
Abstract Over the past few decades, the use natural products and their derivatives as green chemi... more Abstract Over the past few decades, the use natural products and their derivatives as green chemicals in different applications has been increasing, due to these products’ green character, wide availability, and renewability. Curcumin is a widely available and utilized natural compound, and in this work it was converted to potassium curcuminate, which was made to react with ethoxylated hexadecyl ammonium chloride (EHC) or ethoxylated octadecyl ammonium chloride (EOC) to produce the amphiphilic ionic liquids (AILs) ethoxylated hexadecylammonium curcuminate (EHC-IL) and ethoxylated octadecylammonium curcuminate (EOC-IL), respectively. The chemical structure, surface activity, relative solubility number, thermal stability, and dynamic light scattering of EHC-IL and EOC-IL were determined with different techniques. In addition, their efficiencies in the demulsification of emulsions of water in heavy crude oil were evaluated. Moreover, the factors affecting on the demulsification efficiency, including the effect of AIL concentration, water content, temperature, and salinity were also evaluated. Both compounds displayed high efficiency as demulsifiers with efficiency increasing with the demulsifier concentration, water content, and demulsification temperature. Furthermore, EHC-IL displayed higher efficiency and produced cleaner demulsified water than EOC-IL.
Journal of Industrial and Engineering Chemistry, 2016
Abstract This work reports the synthesis and application of amphiphilic ionic liquid (IL) in the ... more Abstract This work reports the synthesis and application of amphiphilic ionic liquid (IL) in the petroleum field. The ionic liquid was synthesized by etherification of octadecylamine with tetraethylene glycol followed by quaternization with p-toluene sulfonic acid. The chemical structure was confirmed by NMR spectroscopy. The surface activity, aggregation, adsorption, and the solubility of the ethoxylated octadecylammonium tosylate were investigated. The interfacial parameters between IL aqueous solution and crude oil emulsions were determined from interfacial tension measurement. The results showed the dependence of interfacial tension on the concentration, crude oil emulsion composition and chemical structure of the prepared amphiphiles. The mechanism of aggregation and adsorption ethoxylated octadecylammonium tosylate was proposed and confirmed at different interfaces. The demulsification and oil spill dispersion efficiencies were investigated at different amphiphile concentrations. The performance of amphiphilic ILs revealed that their demulsification efficiency reached 100% and the settling time required for efficient separation decreased with increment of water contents of crude oil emulsions. Moreover, the prepared amphiphilic ILs achieved oil spill dispersion efficiency more than 80% at surfactant oil ratio (1:25).
Colloids and Surfaces A: Physicochemical and Engineering Aspects, Nov 1, 2021
Abstract Over the past few decades, the use natural products and their derivatives as green chemi... more Abstract Over the past few decades, the use natural products and their derivatives as green chemicals in different applications has been increasing, due to these products’ green character, wide availability, and renewability. Curcumin is a widely available and utilized natural compound, and in this work it was converted to potassium curcuminate, which was made to react with ethoxylated hexadecyl ammonium chloride (EHC) or ethoxylated octadecyl ammonium chloride (EOC) to produce the amphiphilic ionic liquids (AILs) ethoxylated hexadecylammonium curcuminate (EHC-IL) and ethoxylated octadecylammonium curcuminate (EOC-IL), respectively. The chemical structure, surface activity, relative solubility number, thermal stability, and dynamic light scattering of EHC-IL and EOC-IL were determined with different techniques. In addition, their efficiencies in the demulsification of emulsions of water in heavy crude oil were evaluated. Moreover, the factors affecting on the demulsification efficiency, including the effect of AIL concentration, water content, temperature, and salinity were also evaluated. Both compounds displayed high efficiency as demulsifiers with efficiency increasing with the demulsifier concentration, water content, and demulsification temperature. Furthermore, EHC-IL displayed higher efficiency and produced cleaner demulsified water than EOC-IL.
Journal of Industrial and Engineering Chemistry, 2016
Abstract This work reports the synthesis and application of amphiphilic ionic liquid (IL) in the ... more Abstract This work reports the synthesis and application of amphiphilic ionic liquid (IL) in the petroleum field. The ionic liquid was synthesized by etherification of octadecylamine with tetraethylene glycol followed by quaternization with p-toluene sulfonic acid. The chemical structure was confirmed by NMR spectroscopy. The surface activity, aggregation, adsorption, and the solubility of the ethoxylated octadecylammonium tosylate were investigated. The interfacial parameters between IL aqueous solution and crude oil emulsions were determined from interfacial tension measurement. The results showed the dependence of interfacial tension on the concentration, crude oil emulsion composition and chemical structure of the prepared amphiphiles. The mechanism of aggregation and adsorption ethoxylated octadecylammonium tosylate was proposed and confirmed at different interfaces. The demulsification and oil spill dispersion efficiencies were investigated at different amphiphile concentrations. The performance of amphiphilic ILs revealed that their demulsification efficiency reached 100% and the settling time required for efficient separation decreased with increment of water contents of crude oil emulsions. Moreover, the prepared amphiphilic ILs achieved oil spill dispersion efficiency more than 80% at surfactant oil ratio (1:25).
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Papers by Mahmood M . S . ABDULLAH