Extraction kinetics of Fe(III) by di-(2-ethylhexyl) phosphoric acid using a Y–Y shaped microfluidic device

Ciceri, Davide; Mason, Lachlan; Harvie, Dalton J. E.; Perera, Jilska M.; Stevens, Geoffrey W.

doi:10.1016/j.cherd.2013.08.033

Cited by 44 publications

(27 citation statements)

References 51 publications

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“…Microfluidic extraction can be categorized into two types according to flow pattern, i.e., co-laminar microfluidic extraction and droplet-based microfluidic extraction. Experiments on both configurations have proved that the microfluidics is a highly efficient approach to achieve extraction equilibrium in much shorter time compared with traditional bulk devices [6][7][8][9][10]. In a co-laminar microfluidic extraction system, since aqueous and organic streams flow side by side, it is convenient to achieve phase separation at the outlet.…”

Section: Nomenclaturementioning

confidence: 99%

Toward a mechanistic understanding of microfluidic droplet-based extraction and separation of lanthanides

Zhang

Wang

Luo

et al. 2019

Chemical Engineering Journal

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Droplet-based microfluidic extraction is a promising way for effective lanthanides extraction due to its outstanding mass transfer performance. The separation process can be greatly enhanced with the droplet-based microfluidic extraction technique. However, the interactions between mass transfer, microfluidic dynamics and extraction kinetics are still unclear, which has hindered further manipulation on microfluidic extraction to boost extraction performance. In this study, the mechanisms of microfluidic droplet-based extraction and separation intensification of lanthanides are for the first time unveiled by using a numerical simulation model. The limiting factors for the performance of droplet-based microfluidic extraction are identified through a model-based parametric analysis. The numerical analyses provide a comprehensive understanding of droplet-based microfluidic extraction systems and offer operation and optimization guidelines for future research in this area.

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Section: Nomenclaturementioning

confidence: 99%

Toward a mechanistic understanding of microfluidic droplet-based extraction and separation of lanthanides

Zhang

Wang

Luo

et al. 2019

Chemical Engineering Journal

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“…В системе апатит-H3PO4-H2SO4-H2O при температуре 80 °С экспериментально показано, что в ходе процесса pH реакционной смеси повышается до значений рН 6,3 в течение порядка 30 мин, а затем происходит его уменьшение до значений рН 4,5-5,0. Остаточный pH в конце процесса определяется значением pH фосфорной кислоты [11,12]. Сравнение значений рН раствора серной кислоты в водном растворе фосфорной кислоты (рисунок 3) и значений рН реакционной смеси (рисунок 2) при соответствующих концентрациях серной кислоты (рисунок 1) показывает, что значение рН реакционной смеси определяется присутствующим в смеси гелем монокальцийфосфата.…”

Section: результаты и обсуждениеunclassified

Change of acidity of the environment in the process of decomposition of apatitis sulfuric acid

Sabirov

Махоткин

Сахаров

2019

Vestn. Voronež. gos. univ. inž. tehnol.

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An experimental study of the decomposition process of Kovdorsky apatite with certain particle sizes, in a 1 dm3 batch reactor with stirring of the reaction mixture, initial phosphoric acid concentration 17% by weight, in the system: Apatite-H3PO4 – H2SO4-H2O. Sulfuric acid was introduced in stoichiometric amount at the beginning of the process. The process was carried out at a ratio L:S 2.5:1, at a temperature of 78– 82 °C. The process was monitored by the method of joint determination of sulfuric and phosphoric acids by titrimetric analysis of the composition of the reaction mixture in the presence of methyl orange, and then phenolphthalein. Determined the concentration of phosphoric acid, the concentration of excess or deficiency of sulfuric acid and the concentration of monocalcium phosphate gel were determined. The acidity of the reaction mixture was recorded according to the indications of a Ph-meter (pH-105 MA with a combined glass electrode – ESK-10603). In the system: Apatite-H3PO4-H2SO4-H2O, when analyzing the obtained experimental values of these parameters, it was shown that during the process the pH of the reaction mixture rises to pH 6.3 for about 30 minutes, and then decreases to pH 4.5–5. Comparison of the dependence of pH values on the concentration of sulfuric acid in an aqueous solution of phosphoric acid and the pH values of the reaction mixture with the corresponding concentrations of sulfuric and phosphoric acids shows that the pH value of the reaction mixture is determined by the presence in the mixture between weft product - monocalcium phosphate gel. The process of decomposition of apatite in the system Apatite-H3PO4-H2SO4-H2O proceeds in several stages. At the beginning, a rapid decomposition of phosphate raw materials with phosphoric acid and a corresponding change in the pH of the reaction mixture, associated with the accumulation of monocalcium phosphate in solution, takes place. Then there is a slow decomposition of monocalcium phosphate with sulfuric acid and a corresponding decrease in pH to 4.5–5. The pH value at the end of the process is determined by the physicochemical properties of phosphoric acid present in the reaction mixture. At all stages of the process there is a constant increase in the concentration of phosphoric acid associated with the decomposition of monocalcium phosphate gel.

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“…Tri-n-butyl phosphate (TBP) is an efficient extracting and separating agent and widely used as an exractant for the extraction of actinides, lanthanides and rare earth metal ions [6][7][8]. The addition of various diluents such as kerosene, benzene, octane, dodecaneetc with the extractant facilitates the extraction rate for greater dispersal and more rapid phase disengagement [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Viscosity modelling of tri-n-butyl phosphate + benzene mixtures at 308.15K

2020

Biointerface Res Appl Chem

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Dynamic viscosities () of a binary liquid system: Tri-n-butyl phosphate (TBP) + benzene have been experimentally measured over the entire range (X1) of TBP at temperature 308.15K and pressure 0.1MPa. The dynamic viscosity of liquid mixtures hasbeen calculated using five mathematical relations of zero adjustable parameters such as Croenaurer-Rothfus- Kermore relation, Gambrill relation, Bingham relation, Kendall-Munroe relation and Arrhenius – Eyring relation. The validity of these relations has been verified separately by taking the average percentage deviations (APD) and root mean square deviation relative (RMSDs) between experimental and computed values and displayed graphically. Furthermore, the mixture viscosities have been correlated with those predicted one by using another six models of single and double adjustable / interaction parameters such as Grunberg-Nissan, Katti and Chaudhri, Hind, Tamura -Kurata, Heric and Eyring-Margules. A comparison between theoretical and experimental values of viscosity divulges that Gambrill’s relation predicts the data reasonably well in case of zero adjustable parameters whereas Eyring-Margules shows the best fit in case of single and double interaction parameters.

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Extraction kinetics of Fe(III) by di-(2-ethylhexyl) phosphoric acid using a Y–Y shaped microfluidic device

Cited by 44 publications

References 51 publications

Toward a mechanistic understanding of microfluidic droplet-based extraction and separation of lanthanides

Toward a mechanistic understanding of microfluidic droplet-based extraction and separation of lanthanides

Change of acidity of the environment in the process of decomposition of apatitis sulfuric acid

Viscosity modelling of tri-n-butyl phosphate + benzene mixtures at 308.15K

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