scholarly journals Surfactant-enhanced heterogeneity of the aqueous interface drives water extraction into organic solvents

2019 ◽  
Vol 21 (6) ◽  
pp. 2866-2874 ◽  
Author(s):  
Michael J. Servis ◽  
Aurora E. Clark
Keyword(s):  
Organic Solvents ◽  
Organic Phase ◽  
Liquid Extraction ◽  
Water Extraction ◽  
Liquid Liquid Extraction

Liquid/liquid extraction (LLE) is one of the most industrially relevant separations methods. Adsorbed surfactant is demonstrated to enhance interfacial heterogeneity and lead to water protrusions that form the basis for transport into the organic phase.

scholarly journals EXTRACTION OF COLORED SUBSTANCES FROM MATE (ILEX PARAGUARIENSIS)

1998 ◽  
Vol 6 (6) ◽  
pp. 45-51
Author(s):  
Vania Regina Gabbi Polli ◽  
Alnei Ramos Prochnow ◽  
Juliane Zimmernan Tamanini
Keyword(s):  
Organic Solvents ◽  
Diethyl Ether ◽  
Sodium Lauryl Sulfate ◽  
Extraction Process ◽  
Liquid Extraction ◽  
Ilex Paraguariensis ◽  
Lauryl Sulfate ◽  
Liquid Liquid Extraction

Liquid-liquid extraction of pigments present in mate (flex Paraguariensis) was studied using various organic solvents and different concentrations. The best results were obtained using diethyl ether and sodium lauryl sulfate. The effect of the addition of ethanol on the extraction process was also analyzed.

scholarly journals Short Alternative Route for Nuclear Fuel Reprocessing Based on Organic Phase Self-Splitting

Molecules ◽  
2021 ◽  
Vol 26 (20) ◽  
pp. 6234
Author(s):  
Julie Durain ◽  
Damien Bourgeois ◽  
Murielle Bertrand ◽  
Daniel Meyer
Keyword(s):  
Organic Phase ◽  
Process Development ◽  
Temperature Drop ◽  
Extraction Process ◽  
Liquid Extraction ◽  
Nuclear Industry ◽  
Process Conditions ◽  
Joint Management ◽  
Liquid Liquid Extraction ◽  
Almost All

A more sustainable management of natural resources and the establishment of processes allowing a joint management of nuclear materials to avoid their diversion from their civilian use are two issues for the nuclear industry. Short alternatives to existing processes have therefore been proposed based on known systems available, tributylphosphate (TBP), for the separation of actinides by liquid/liquid extraction. Proof of concept of such alternative has been established on the uranium(VI)/thorium(IV) system. From an organic phase consisting of a mixture of TBP/n-dodecane loaded with uranium and thorium, two fluxes have been obtained: the first contains almost all of the thorium in the presence of uranium in a controlled ratio, the second contains surplus uranium. Two levers were selected to control the spontaneous separation of the organic phase: the addition of concentrated nitric acid, or the temperature variation. Best results have been obtained using a temperature drop in the liquid/liquid extraction process, and variations in process conditions have been studied. Final metal recovery and solvent recycling have also been demonstrated, opening the door for further process development.

scholarly journals Tantalum and Niobium Selective Extraction by Alkyl-Acetophenone

2018 ◽  
Author(s):  
Moussa Toure ◽  
Guilhem Arrachart ◽  
Jean Duhamet ◽  
Stephane Pellet-Rostaing
Keyword(s):  
Physicochemical Properties ◽  
Aqueous Phase ◽  
Organic Phase ◽  
Extraction Efficiency ◽  
Selective Extraction ◽  
Extraction Process ◽  
Liquid Extraction ◽  
Waste Solution ◽  
Liquid Liquid Extraction ◽  
Kd Values

A study has been carried out on Ta and Nb recovery by liquid-liquid extraction process using 4-methylacetophenone (4-MAcPh) as organic phase. The 4-MAcPh was compared to methylisobutylketone (MIBK) with respect to extraction efficiencies (kD values) at different concentrations of H2SO4 in the aqueous phase. The results showed a similar extraction of Nb for both solvents. However, for Ta extraction efficiency is increased by a factor of 1.3 for 4-MAcPh. In addition, the MIBK solubilized completely after 6 mol L-1 of H2SO4 against only a loss of 0.14 to 4% for 4-MAcPh between 6 and 9 mol L-1 of H2SO4. The potential of 4-MAcPh has also been studied to selectively recover Ta from a model capacitor waste solution. The results showed a selectivity for Ta in the presence of impurities such as Fe, Ni, Mn. The 4-MAcPh also presents the advantage of having physicochemical properties adapted to its use in liquid-liquid extraction technologies such as mixer-settlers.

scholarly journals Extraction of Nb(v) by quaternary ammonium-based solvents: toward organic hexaniobate systems

2016 ◽  
Vol 45 (48) ◽  
pp. 19351-19360 ◽  
Author(s):  
Gauthier J-P. Deblonde ◽  
Alexandre Chagnes ◽  
Marie-Aude Roux ◽  
Valérie Weigel ◽  
Gérard Cote
Keyword(s):  
Organic Solvents ◽  
Quaternary Ammonium ◽  
Liquid Extraction ◽  
Extraction System ◽  
Liquid Liquid Extraction

A new liquid–liquid extraction system has been developed for the rapid and easy transfer of hexaniobates (HxNb6O19x−8) into organic solvents.

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