Molecular Dynamics Study of the Behaviour of TBP-Zinc-Chloride Complex at the Chloroform/Water Interfacial System

Kujawski, Piotr; Bogacki, Mariusz B.

doi:10.1080/01496395.2012.672518

Cited by 4 publications

(2 citation statements)

References 27 publications

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“…The extractant binds metal ions and transfers them to the organic phase according to the equation: 2(RH) org + Me 2+ = (R 2 Me) org + 2H + (11) It is observed that zinc(II) ions (99.0%) were effectively extracted from acidic solutions (Table 3) of a pH around 2.7; Cu(II) (98.5%) and Cd(II) (96.0%) ions were effectively extracted from solutions of pH>4 along with Zn(II); whereas Ni(II) were most effectively extracted at a pH around 5.5 (74.0%).…”

Section: Solvent Extractionmentioning

confidence: 99%

“…Zinc can also be separated by selective solvent extraction using an industrial extractant (RH). For extraction from acidic solutions, the extractants used were tributyl phosphate (TBP) [11][12][13], di(2-ethylhexyl)phosphoric acid (D2EHPA) [12,14], and a phosphonium ionic liquid [15,16], for neutral ones containing chlorides -trioctyl amine (TOA) [17] or LIX63 (5,8-diethyl-7-hydroxydodecan-6oxime) [18], while imidazole derivatives were used for solutions left after leaching with ammonia or NaOH of a pH of 7-8 [6]. Either extraction naphtha or toluene were used as water-immiscible solvents.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Recovery of Zinc from Metallurgic Waste Sludges

Radzyminska-Lenarcik¹,

Sulewski²,

Urbaniak³

2015

Pol. J. Environ. Stud.

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Zinc-bearing sludge deposits resulting from metallurgical zinc production have been investigated. They were found to contain 11.0-13.0% of zinc, 1.4-1.5% of copper, 1.1-1.3% of arsenic, and ca 1% of lead, plus small amounts of cadmium and nickel (0.5 and 0.1%, respectively). The results of the leaching of these deposits with hydrochloric, sulfuric, and lactic acids, as well as with ammonia and NaOH, are presented. The composition of the leachates was dependent on the leaching reagent used. The effectiveness of leaching decreased in the following order of the reagents used: ammonia (10.5%), HNO 3 and NaOH (10.0% each), H 2 SO 4 (9.5%), HCl (9.0%), and lactic acid (8.0%). Due to the poor selectivity of the strong mineral acids used, the most effective leaching reagents were concentrated ammonia, NaOH, and lactic acid. The recovery of zinc using electrolysis and solvent extraction also was evaluated. As much as 92.0-99.0% of zinc was deposited on the cathode for a sulfuric acid solution having a pH in the range 1-2. The extractants used in the extraction process were a 60% TBP solution in toluene for acidic solutions and 1-decyl-2-methylimidazole for weakly acidic and weakly alkaline solutions. From a solution having a pH of around 2.7, Zn(II) ions were most effectively extracted (99.0%), whereas from those of a pH>4, also Cu(II) and Cd(II) (98.5 and 96.0%, respectively) ions were co-extracted along with Zn(II). The Ni(II) ions were most effectively extracted at a pH around 5.5 (74.0%). From solutions left after leaching with NaOH, 1-decyl-2-methylimidazole extracted mostly Zn(II) and Cu(II), whereas from those left after leaching with ammonia, Cd(II) could be extracted in addition to Zn(II) and Cu(II). An optimum pH for zinc recovery was 7.5-8.0.

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Section: Solvent Extractionmentioning

confidence: 99%