Effect of the quaternary ammonium salt Aliquat 336 on the solvent extraction of lanthanoid (III) ions with thenoyltrifluoroacetone

Solvent extraction and separation of lanthanoids with mixtures of chelating extractant and 1-(2-pyridylazo)-2-naphthol

“…On the other hand, the formation of the complex Ln(TTA) 3 S in the organic phase (Eq. (7)) is connected with the replacement of all water molecules from the coordination sphere of the complex La(TTA) 3 (H 2 O) n [26]. This results in a much higher stability of the mixed complex Ln(TTA) 3 S (as compared to the chelate Ln(TTA) 3 ).Therefore, the difference between K T,S and K T will be higher than those of K P,S and K P and the values of β T,S calculated from Eq.…”

“…As there are a number of different solvent extraction systems that could be used for metal ions separation, synergistic extraction systems have received attention for a long time. The synergistic extraction of trivalent actinoids and lanthanoids is of great interest because of the high extraction efficiency of these metal ions in presence of a chelating agent and a neutral donor [1][2][3][4][5][6][7]. The separation of the lanthanoids and actinoids has also been discussed [8][9][10][11][12].…”

“…The separation of the lanthanoids and actinoids has also been discussed [8][9][10][11][12]. Thenoyltrifluoroacetone and a large number of 4-acyl-5-pyrazolones have been extensively used as extractants for lanthanoids and other elements separately and in combination with various synergistic agents [2][3][4][13][14][15][16].…”

Simultaneous removal of arsenic and mercury from natural-gas-co-produced water from the Gulf of Thailand using synergistic extractant via HFSLM

“…The amount of mercury ions that complied with the regulatory limit was obtained in 6-cycle separation by using 2% (v/v) TOA and 0.5 M NaOH at a pH of feed solution of 2.5, and equal flow rates of feed and stripping solutions of 50 ml/min [13]. Therefore, this current work focuses on the synergistic extraction to enhance the simultaneous arsenic and mercury separation from co-produced water via HFSLM for their regulatory discharge limits because various combinations of two or more extractants can produce a synergistic effect which the extractability of a mixture of the extractants is greater than the sum of their individual extractabilities [19][20][21][22][23][24][25]. The mechanism of the synergistic extraction, types of the extractants, concentration of the synergistic extractant, concentration of H 2 SO 4 (co-extractant) in feed solution, types of stripping solutions (NaOH, DI water, HNO 3, H 2 SO 4 and thiourea), and the number of separation cycles were studied.…”

Extraction of Ca (II) and Mg (II) from Hydrochloric Acid Solutions by N, N-Dioctyl-1-Octan Ammonium Chloride in Methyl Isobutyl Ketone

“…Using these condition 90% of Calcium was in organic phase and all of magnesium remains in water phase. Kimura (1960) Organic molecules as alamine 336 (Filiz, 2007;Sayar et al, 2007;, aliquat 336 (Atanassova et al, 2002;El-Nadi et al, 2009), are able to form complexes with metals ions and for that we can use them to extract metals ions from hydrometallurgical solutions.…”