Thermoseparative Regeneration of Triblock Copolymer after Aqueous Biphasic Extraction of Molybdate Species

Abstract

The present study aims at the generation of a triblock copolymer vs sodium sulfate aqueous biphasic system (ABS), its application toward extraction of molybdenum species, and finally purification and regeneration of the block copolymer. The ABS was characterized for its biphasic region by constructing the phase diagram using turbidometric titration methods. Extractions were monitored using the spectrophotometric method directly in the block copolymer medium. Complete extraction of molybdenum species was observed in this method. Interference from other closely related metal ions in the extraction process was found to be negligible excepting oxo and polyoxometallates of vanadium and tungsten. Regeneration of the polymer was done using a thermoseparation technique followed by successive treatment with ion exchange resins. ∼87% of the pure triblock copolymer could be regenerated as a result of such treatment.

Poly(propylene glycol) vs Sugar Alcohol-Based Aqueous Biphasic System to Extract Drugs and Subsequent Recovery of the Polymer

“…To recover the polymer after extractions, we need some regeneration techniques to remove D-mannitol, Ivermectin, Doxycycline, and Prednisolone from the polymer-rich phase. First, the simplest method, thermoseparation technique, 25 was followed to regenerate the polymer. This technique was helpful to remove D-mannitol from the polymer-rich phase.…”

“…are already reported to recover the polymer-rich phase after extractions. 24,25 In this work, the thermoseparation technique and the adsorption method were followed to regenerate the polymer.…”

“…Several techniques such as deproteination, desalting by ultrafiltration, thermoseparation, etc. are already reported to recover the polymer-rich phase after extractions. , In this work, the thermoseparation technique and the adsorption method were followed to regenerate the polymer.…”

Uncommon biphasic behaviour induced by very high metal ion concentrations in HCl/H2O/[P44414]Cl and HCl/H2O/PEG-600 systems

“…In particular, the use of the [P44414]Cl (tri-butyl tetradecyl phosphonium chloride) ionic liquid (IL) or of the polyethene glycol (PEG) polymer for metal extraction has already been the subject of several papers. [1][2][3][4][5][6] The use of these compounds, more appropriately called biphasic inducers in these classical ABS, helps to make the process eco-sustainable. The [P44414]Cl hydrophilic ionic liquid (i) is less toxic than the respective hydrophobic IL 7 , (ii) can be used in much lower quantities than organic volatile solvents and (iii) the extraction kinetics is favored by its low viscosity.…”

Are molecular solvents, aqueous biphasic systems and deep eutectic solvents meaningful categories for liquid–liquid extraction?

“…First, aqueous biphasic systems (ABS) have been already envisioned for metal extraction more than twenty years ago [18][19][20][21] and interest in these systems is still very high [22][23][24][25]. In fact, ABS have been known for long as the first proof of concept for the extraction of biological molecules can be traced back in the 50's [26] but since the breakthrough of acidic-ABS which allow extraction of metals suffering hydrolysis [27], their use for metal extraction has 1 https://www.ic.gc.ca/opic-cipo/cpd/fra/brevet/2785001/ sommaire.html.…”