Recovery of Niobium and Tantalum by Solvent Extraction from Penouta Sn–Ta–Nb Deposit

2020 ◽  
Author(s):  
Olga Rodríguez ◽  
Francisco J. Alguacil ◽  
Esther Escudero Baquero ◽  
Irene García-Díaz ◽  
Félix A. López
Keyword(s):  
Solvent Extraction ◽  
Aqueous Solutions ◽  
Acid Leaching ◽  
Liquid Extraction ◽  
Raw Material ◽  
Real Solutions ◽  
Mining Tailings ◽  
Liquid Liquid Extraction

This work presented data using always real solutions yielded from the treatment of Spanish raw material, in detail, from a slag obtained in a pyrometallurgy process of tin production from mining tailings containing mainly cassiterite and columbo tantalite. In this investigation the raw material was treated by acid leaching, using HF/H2SO4 as a leaching agent. Then, liquid-liquid extraction of Nb and Ta have performed with Cyanex®923 extractant, further, both metals were separately stripped. Once metals were separated into two aqueous solutions, they were precipitated and calcined to yield the corresponding compounds (Nb2O5 of 98.5% purity and Ta2O5 of 97.3% purity).

Comparison of Sorption and Extraction Methods for Recovery of Trace Organics from Water

1983 ◽  
Vol 15 (6-7) ◽  
pp. 149-159 ◽  
Author(s):  
V C Blok ◽  
G P Slater ◽  
E M Giblin
Keyword(s):  
Solvent Extraction ◽  
Methylene Chloride ◽  
Extraction Methods ◽  
Liquid Extraction ◽  
Standard Mixture ◽  
Liquid Liquid Extraction ◽  
Trace Organics ◽  
Tenax Gc

Several commercially available adsorbents were compared with solvent extraction methods for their utility in recovering trace organics from water. The adsorbents examined included Amberlite XAD-2, XAD-4 and XAD-8, Ambersorb XE340 and XE348 and Tenax-GC. All were found to produce high artifact levels, even after extensive clean-up, making them unsuitable for the analysis of trace organics in water. Quantitatively, Likens-Nickerson or continuous liquid-liquid extraction with méthylene chloride gave better recoveries than the adsorbents. Qualitatively, extractive methods were preferred as they yielded much lower levels of impurities than the adsorbents. These methods of recovering trace organics were evaluated using a standard mixture of compounds added to the water at a level of 55 µg/l. Likens-Nickerson extraction gave comparable recoveries of this mixture at 55 µg/l and 11 µg/l.

Sulfuric Acid Leaching of Bangka Indonesia Ilmenite Ore and Ilmenite Decomposed by NaOH

2013 ◽  
Vol 789 ◽  
pp. 522-530 ◽  
Author(s):  
Latifa Hanum Lalasari ◽  
Rudi Subagja ◽  
Akhmad Herman Yuwono ◽  
Florentinus Firdiyono ◽  
Sri Harjanto ◽  
...  
Keyword(s):  
Titanium Dioxide ◽  
Sulfuric Acid ◽  
Solvent Extraction ◽  
Acid Leaching ◽  
Raw Material ◽  
Key Factors ◽  
Sulfuric Acid Leaching ◽  
Acid Environment

lmenite (FeO.TiO2) ore from Bangka island-Indonesia is a potential raw material for synthesizing titanium dioxide (TiO2), which can be used further as pigmen and photocatalyst. The fabrication of TiO2 particles from ilmenite can be carried out through the solvent extraction using sulfuric acid route. Therefore, the solubility of the ilmenite ore in sulfuric acid environment is one of the key factors to obtain the desired TiO2 particles. The current research is aimed at comparing the solubility of pristine Bangka ilmenite ore with that of precedingly decomposed by sodium hidroxide (NaOH) in pressurized and atmospheric reflux reactors. The dissolution of both precursors was carried out in those reactors under various temperatures of 75, 100, 125, 150 and 175°C. The results showed that the optimum dilution was achieved at 150°C. The obtained recovery of ilmenite was 88.8 % for the pressurized reactor and 75.5% for the atmospheric reflux reactor. The solubility of titanium (Ti) element increased steadily to reach a recovery of 68% at 150°C and decreased significantly afterwards. It was also found that the increase of iron (Fe) element solubility was proportional to the increase of processing temperatures.

scholarly journals Solvent Extraction And Spectrophotomteric Determination Of Cu(Ii) With Dicyclohexyl - 18- Crown-6

2013 ◽  
Vol 10 (3) ◽  
pp. 997-1004
Author(s):  
Baghdad Science Journal
Keyword(s):  
Aqueous Solution ◽  
Solvent Extraction ◽  
Correlation Coefficient ◽  
Extraction Efficiency ◽  
Molar Absorptivity ◽  
Liquid Extraction ◽  
Liquid Liquid Extraction ◽  
Coloured Complex

Liquid-Liquid Extraction of Cu(II) ion in aqueous solution by dicyclohexyl-18-crown-6 as extractant in dichloroethane was studied .The extraction efficiency was investigated by a spectrophometric method. The reagent form a coloured complex which has been a quantitatively extracted at pH 6.3. The method obeys Beer`s law over range from (2.5-22.5) ppm with the correlation coefficient of 0.9989. The molar absorptivity the stoichiometry of extracted complex is found to be 1:2. the proposed method is very sensitive and selective.

Liquid–Liquid Extraction of Butanol from Dilute Aqueous Solutions Using Soybean-Derived Biodiesel

2009 ◽  
Vol 86 (11) ◽  
pp. 1123-1128 ◽  
Author(s):  
Lalleh Adhami ◽  
Bennie Griggs ◽  
Patrick Himebrook ◽  
Katherine Taconi
Keyword(s):  
Aqueous Solutions ◽  
Liquid Extraction ◽  
Liquid Liquid Extraction ◽  
Dilute Aqueous Solutions

Salting-out assisted liquid-liquid extraction method combined with GC-MS for the determination of topiramate in aqueous solutions: development and application of the methodology

2019 ◽  
Vol 55 (13) ◽  
pp. 2303-2312 ◽  
Author(s):  
Janiele Mayara Ferreira De Almeida ◽  
Elania Maria Fernandes Silva ◽  
Lourena Mafra Veríssimo ◽  
Nedja Suely Fernandes
Keyword(s):  
Aqueous Solutions ◽  
Extraction Method ◽  
Liquid Extraction ◽  
Salting Out ◽  
Liquid Liquid Extraction

Use of combined solvent extraction-electrodeposition techniques to uranium and thorium isotopes analysis in industrial phosphoric acid, phosphate and phosphogypsum by alpha-particle spectrometry

2003 ◽  
Vol 91 (1) ◽  
Author(s):  
R. Zarki ◽  
A. Elyahyaoui ◽  
A. Chiadli
Keyword(s):  
Solvent Extraction ◽  
Phosphoric Acid ◽  
Isotopic Composition ◽  
Alpha Particle ◽  
Phosphate Rock ◽  
Liquid Extraction ◽  
Acid Phosphate ◽  
Liquid Liquid Extraction ◽  
Thorium Isotopes

SummaryA method combining liquid-liquid extraction and electrodeposition procedures is carried out to determine isotopic composition of uranium and thorium in technical wet phosphoric acid, phosphate rock and phosphogypsum leachates, by

Tuning the structure and solubility of nanojars by peripheral ligand substitution, leading to unprecedented liquid–liquid extraction of the carbonate ion from water into aliphatic solvents

2016 ◽  
Vol 45 (20) ◽  
pp. 8327-8339 ◽  
Author(s):  
Basil M. Ahmed ◽  
Brice Calco ◽  
Gellert Mezei
Keyword(s):  
Solvent Extraction ◽  
Ligand Substitution ◽  
Liquid Extraction ◽  
Hydration Energy ◽  
Carbonate Ion ◽  
Liquid Liquid Extraction ◽  
First Time

Carbonate, an anion with large hydration energy, is extracted from water by solvent extraction for the first time, using functionalized nanojars.

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