Continuous Extraction of Europium(III) by Ionic Liquid in the Rotating Disk Column with an Asymmetrical Structure Aimed at the Evaluation of Reactive Mass Transfer

Abstract

In this study, the features of the solvent extraction technique were investigated to explore the potential of ionic liquid for extracting Eu(III) from aqueous solution. The transport process between the aqueous and organic phase was carried out in the rotating disk column with an asymmetrical structure and a continuous mode of operation. The utilization of Cyphos IL 104 as an ionic liquid in comparison with Cyanex272 extractant was evaluated for the extraction abilities in the recovering of Eu(III) under different conditions, including agitation speed, inlet aqueous, and solvent phase velocities. The degree of extraction and the mass-transfer rate were best when the agitation speed and the superficial velocities of aqueous and solvent phases were adjusted to 690 rpm, 0.831 mm/s, and 1.385 mm/s, respectively. The better efficiency was achieved using the ionic liquid with 0.02 mol/L concentration, 96.52% Eu(III) extraction in comparison to the same condition without the presence of ionic liquids with Cyanex272 (0.5 mol/L, 99.66%). With the analysis of the data, it was noted that the increase in the operating parameters has a positive influence on the holdup, degree of extraction, and mass-transfer rates. The percentage increase equal to 33.57% for overall mass-transfer coefficients was obtained with the increment of mixing in the column. The results showed that the mass transfer is associated with reactive resistance. The previous correlation did not explain the behavior of the system correctly in the reactive mode. Finally, the empirical models using the Sherwood number were developed to correlate the mass-transfer coefficient.

Hydrodynamic features of pulsed solvent extractor for separation of two metals by using the antagonistic effect of solvents

“…The successful extraction of cobalt, copper and other metals relies not only on the choice of solvents and extractants, but also on the extraction apparatus and its operational form. Altering the phase mixing by means of agitation 41 – 47 or pulsing 48 – 50 assists in improving the quality and efficiency of liquid–liquid extraction processes.…”

Reactive Extraction of Betaine from Sugarbeet Processing Byproducts

“…The technique has been evaluated for the recovery of metals, lanthanides, alcohols, antibiotics, phenols, vitamins, amines, and carboxylic acids from synthetically prepared aqueous solutions or complex media. 29 − 36 The use of an extraction agent in the organic phase that can interact with the target product is the main difference between reactive extraction and its original technique. This couples the advantage of chemical extraction with physical extraction, resulting in higher recovery efficiencies.…”

“…Reactive extraction has been identified as a promising technique for the recovery of biochemicals from dilute aqueous media and is preferred over other separation techniques due to its high efficiency, selectivity, operational practicality, and low-cost and energy demand. , Moreover, in situ and continuous operational capability enable its use for commercial purposes. The technique has been evaluated for the recovery of metals, lanthanides, alcohols, antibiotics, phenols, vitamins, amines, and carboxylic acids from synthetically prepared aqueous solutions or complex media. − The use of an extraction agent in the organic phase that can interact with the target product is the main difference between reactive extraction and its original technique. This couples the advantage of chemical extraction with physical extraction, resulting in higher recovery efficiencies .…”

Scale-Up Study on the Performance of the Asymmetric Rotating Impeller Extraction Column

“…There are several countercurrent-agitated LLE columns commonly used for commercial applications such as the rotating disk contactor (RDC), − asymmetric rotating disk contactor (ARDC), ,, pulsed column, , Kuhnni, Karr, Scheibel column, and multistage impeller columns. , In recent times, several researchers have investigated the mass transfer characteristics of these extraction columns for the separation of metal ions from aqueous solutions, for example, extraction of samarium and gadolinium from aqueous nitrate solution in the pulsed disc and doughnut column, extraction of cobalt from sulfate solution in the Oldshue–Rushton column, extraction and separation of lanthanum and cerium from aqueous solution in the Scheibel column, extraction of samarium and gadolinium in the Mixco Column, extraction of europium using an ionic liquid in ARDC, and so forth.…”