Membrane distillation and dispersive solvent extraction in a closed-loop process for water, sulfuric acid and copper recycling from gold mining wastewater

2021 ◽  
pp. 133874
Author(s):  
Victor Rezende Moreira ◽  
Yuri Abner Rocha Lebron ◽  
Débora Gontijo ◽  
Míriam Cristina Santos Amaral
Keyword(s):  
Sulfuric Acid ◽  
Solvent Extraction ◽  
Gold Mining ◽  
Closed Loop ◽  
Membrane Distillation ◽  
Mining Wastewater

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.

Solvent extraction of titanium from the simulated ilmenite sulfuric acid leachate by trialkylphosphine oxide

2012 ◽  
Vol 113-114 ◽  
pp. 185-191 ◽  
Author(s):  
Xiaoli Hao ◽  
Li Lü ◽  
Bin Liang ◽  
Chun Li ◽  
Pan Wu ◽  
...  
Keyword(s):  
Sulfuric Acid ◽  
Solvent Extraction ◽  
Trialkylphosphine Oxide

SOLVENT EXTRACTION OF NITRIC, HYDROCHLORIC AND SULFURIC ACID AND THEIR URANYL SALTS WITH TRI-n-OCTYLPHOSPHINE OXIDE

1992 ◽  
Vol 10 (4) ◽  
pp. 685-696 ◽  
Author(s):  
Djordje M. Petkovlć ◽  
Miroslav M. Kopečni ◽  
Aleksandra A. Mltrovlć
Keyword(s):  
Sulfuric Acid ◽  
Solvent Extraction
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