Pressure aqueous oxidation of molybdenite concentrate with oxygen

2017 ◽  
Vol 174 ◽  
pp. 131-139 ◽  
Author(s):  
Yun-feng Fu ◽  
Qing-gui Xiao ◽  
Yi-ying Gao ◽  
Peng-ge Ning ◽  
Hong-bin Xu ◽  
...  
2008 ◽  
Vol 120 (41) ◽  
pp. 8056-8058 ◽  
Author(s):  
Takato Mitsudome ◽  
Shusuke Arita ◽  
Haruhiko Mori ◽  
Tomoo Mizugaki ◽  
Koichiro Jitsukawa ◽  
...  

2015 ◽  
Vol 104 ◽  
pp. 194-200 ◽  
Author(s):  
Hadi Abdollahi ◽  
Mohammad Noaparast ◽  
Sied Ziaedin Shafaei ◽  
Zahra Manafi ◽  
Jesús A. Muñoz ◽  
...  

2021 ◽  
Vol 21 (9) ◽  
pp. 4846-4851
Author(s):  
Xin-Li Hao ◽  
Yue-Hong Song ◽  
Lin-Yi Li ◽  
Lu-Feng Li ◽  
Shuo-Shuo Chang ◽  
...  

Birnessite-MnO2 nanoflakes were synthesized via an aqueous oxidation method at 90 °C using Mn(CH3COO)2, NaOH, and KMnO4. The samples’ morphology, crystalline structure, and optical property were determined by field emission scanning electron microscopy, X-ray powder diffraction and UV-Vis spectrophotometry. The birnessite-MnO2 nanoflakes were converted to KxMn8O16 and Mn suboxides following a decrease in the concentration of KMnO4 in the reaction. The amount of NaOH in the reaction determined the type of precursor. Without NaOH, the precursor was converted from Mn(OH)2 to Mn2+ (from Mn(CH3COO)2), thereby enabling the synthesis of birnessite-MnO2 nanoflowers. The formation mechanism of birnessite-MnO2 nanoflowers and nanoflakes was clarified via the corresponding simulated crystal structures. Evaluation of the synthesized samples confirmed that the birnessite-MnO2 nanoflakes and nanoflowers exhibited excellent degradation properties.


2003 ◽  
Vol 64 (9-10) ◽  
pp. 1791-1796 ◽  
Author(s):  
B. Canava ◽  
J.F. Guillemoles ◽  
J. Vigneron ◽  
D. Lincot ◽  
A. Etcheberry
Keyword(s):  

2005 ◽  
Vol 690 (20) ◽  
pp. 4488-4491 ◽  
Author(s):  
Christophe M. Thomas ◽  
Christophe Letondor ◽  
Nicolas Humbert ◽  
Thomas R. Ward

Author(s):  
Chen Xing ◽  
Daihui Yang ◽  
Yan Zhang ◽  
Tian Sun ◽  
Junfei Duan ◽  
...  

2019 ◽  
Vol 1 (4) ◽  
Author(s):  
Ping Wang ◽  
Yajing Pan ◽  
Xiao Sun ◽  
Yongqiang Zhang

2015 ◽  
Vol 1130 ◽  
pp. 300-303
Author(s):  
R.E. Rivera Santillan ◽  
F. Patricio Ramirez ◽  
F.A. Lopez Lopez

In this paper bioleaching of molybdenite concentrate (MoS2) with extreme thermophilic microorganisms at constant temperature (65°C) was studied using a new RELVA-RBAL1 bioreactor, designed at the Faculty of Chemistry of the National Autonomous University of Mexico (UNAM). The equipment keeps homogeneous medium creating physical, chemical and biological conditions that lead to optimal growth of microorganisms, improving its resistance and tolerance to molybdenum significantly, thus achieving high extraction. The RELVA-ARBAL1 AIR LIFT bioreactor allows us the control of necessary conditions for a growth more efficient of the microorganisms. This will allow leach more rapidly the ore, increasing the molybdenum extraction kinetics. The results of extraction from bioleaching molybdenite in an orbital incubator were <1% Mo. The new RELVA-RBAL 1 AIR LIFT bioreactor showed a hight efficiency, 96.84% of molybdenum extracted, most reported, in the shortest time.


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