Preliminary Studies of the Obtaining of Solid Metallic Cerium from Fluoride Melts

2003 ◽  
Vol 58 (1) ◽  
pp. 57-62 ◽  
Author(s):  
Virgil Constantin ◽  
Ana-Maria Popescu ◽  
Stefania Zuca
Keyword(s):  
Current Efficiency ◽  
Molten Salt ◽  
Molten Salt Electrolysis ◽  
Temperature Range ◽  
Cubic Form ◽  
Fluoride Melts ◽  
Molten Electrolyte ◽  
A Current ◽  
Decomposition Potential

The present study deals with the obtaining of solid cerium by molten salt electrolysis of a 46.74 - 48.26 - 5wt% LiF-NaF-NaCeF4 mixture, in the temperature range 700 - 730 °C and with a current efficiency of ~ 75%. For this purpose NaCeF4 was obtained, characterized and it’s cubic form was identified. The solubility and decomposition potential of this compound in the molten electrolyte 49.2 - 50.8% LiF-NaF was also studied.

Research on Effect Factors of Current Efficiency in the Process of Sponge Titanium Production by Electrolytic Method

2013 ◽  
Vol 873 ◽  
pp. 72-76
Author(s):  
Guang Qiang Ma ◽  
Ming Zou ◽  
Qi Ling Wang
Keyword(s):  
Current Efficiency ◽  
Molten Salt ◽  
Current Density ◽  
Research Result ◽  
Raw Material ◽  
Salt System ◽  
Anodic Current Density ◽  
Molten Salt Electrolysis ◽  
Sponge Titanium ◽  
Molten Salt System

This paper systematically analyzes the various factors that affect the current efficiency in the process of sponge titanium production by vacuum molten salt electrolysis method. The research result shows that firstly, when electrolysis is undertaken in CaCl2 molten salt system under the condition that the pressure is under 101Pa, temperature is at 850°C, space between electrodes is 5 cm, cathodic current density is 1.05 A.cm-2 and anodic current density is 0.8A.cm-2 , the reoxidation of sponge titanium can be effectively avoided, the loss of electric current can be reduced and current efficiency can be greatly improved. Secondly, current efficiency can be greatly improved when mix molten salt system CaCl2+A is adopted, which can greatly reduce the electrolysis temperature and the resistance of molten salt. Thirdly, current efficiency can be greatly improved through selecting appropriate vacuum degree, appropriate molten salt system, appropriate space between electrodes, appropriate current density; in addition, keeping tidy reduction cell inside and adopting high-purity molten salt and raw material TiO2 are another ways for current efficiency improvement.

scholarly journals A novel perovskite-like Ta-bronze KTa1+z O3: preparation, stoichiometry, conductivity and crystal structure studies

2001 ◽  
Vol 57 (2) ◽  
pp. 157-162 ◽  
Author(s):  
Alla Arakcheeva ◽  
Gervais Chapuis ◽  
Vladimir Grinevitch ◽  
Vladimir Shamray
Keyword(s):  
Crystal Structure ◽  
Molten Salt ◽  
Molten Salt Electrolysis ◽  
Cubic Crystals ◽  
Space Group ◽  
Temperature Range ◽  
Anisotropic Displacement Parameters ◽  
Atom Position

A new cubic Ta-bronze (1) KTa_{1+z}^{+(5 -\delta)}O3 [z ≃ 0.107 (3)] was obtained on a cathode by molten salt electrolysis of the system K2TaOF5–K3TaO2F4–(KF + NaF + LiF)eutectic. Black, metallic cubic crystals of (1) are formed together with tetragonal β-Ta. The perovskite-like crystal structure of (1) [a = 4.005 (1) Å, space group Pm\bar3m] was refined with anharmonic displacement parameters for Ta and K atoms and anisotropic displacement parameters for a split O-atom position [KM4CCD diffractometer; λ(Mo Kα); 3320 measured reflections with I > 3σ(I); R = 0.0095, wR = 0.0065, Δρmin = −0.91 e Å−3, Δρmax = 0.65 e Å−3]. Defects in the O and K atomic positions were found. (1) is a semiconductor in the temperature range 4–300 K, whereas the well studied and closely related colourless transparent crystals KTa+5O3 (2) are dielectric. Differences in the properties of (1) and (2) are assumed to be connected with the existence of Ta dumb-bells statistically distributed into the KTaO3 matrix.

Preparation of Aluminum-Magnesium Alloys from Magnesium Oxide by Molten Salt Electrolysis Method

2009 ◽  
Vol 610-613 ◽  
pp. 874-879
Author(s):  
Feng Li Yang ◽  
Shao Hua Yang ◽  
Zhao Wen Wang ◽  
Zhong Ning Shi ◽  
Bing Liang Gao
Keyword(s):  
Current Efficiency ◽  
Molten Salt ◽  
Chemical Property ◽  
Magnesium Oxide ◽  
Magnesium Alloys ◽  
Electrolytic Cell ◽  
Molten Salt Electrolysis ◽  
Physical Chemical ◽  
Electrolysis Method ◽  
Aluminum Magnesium Alloys

Aluminum-magnesium alloys were prepared from magnesium oxide by molten salt electrolysis method. MgF2-BaF2-LiF was taken as electrolysis.Since the density of MgF2-BaF2-LiF was high than aluminum liquid, upload cathode of aluminum liquid was used in the tests. Current efficiency during melting was more than 80%, and the maximum was up to 87.7%. Some amount of magnesium oxide flowed into electrolytic cell. The content of Mg in alloys increased gradually and up to maximum of 18.6%(w) with electrolyzing time. The experiment results revealed that the addition of KCl improved the physical-chemical property of the melten salt.

Recovery and separation of rare earth elements by molten salt electrolysis

2021 ◽  
Vol 28 (6) ◽  
pp. 899-914
Author(s):  
Tai-qi Yin ◽  
Yun Xue ◽  
Yong-de Yan ◽  
Zhen-chao Ma ◽  
Fu-qiu Ma ◽  
...  
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Molten Salt ◽  
Molten Salt Electrolysis

Recovery and separation of Fe and Mn from simulated chlorinated vanadium slag by molten salt electrolysis

2020 ◽  
Vol 27 (12) ◽  
pp. 1678-1686 ◽  
Author(s):  
Shi-yuan Liu ◽  
Yu-lan Zhen ◽  
Xiao-bo He ◽  
Li-jun Wang ◽  
Kuo-chih Chou
Keyword(s):  
Molten Salt ◽  
Vanadium Slag ◽  
Molten Salt Electrolysis ◽  
Fe And Mn

Methane synthesis from CO2 and H2O with electricity using H-permeable membrane electrochemical cells with Ru catalyst and phosphate electrolyte

2021 ◽  
Vol 5 (4) ◽  
pp. 935-940
Author(s):  
Jun Kubota ◽  
Takaya Okumura
Keyword(s):  
Current Efficiency ◽  
Electrochemical Cells ◽  
Permeable Membrane ◽  
Ru Catalyst ◽  
Electrochemical Conversion ◽  
A Current ◽  
Phosphate Electrolyte

Direct electrochemical conversion of CO2 and H2O to CH4 in a combined Ru-catalyst and H2O electrolyzer system was examined at 270 °C, thus obtaining a current efficiency of 93% for CH4 formation.

scholarly journals Finite Element Analysis and Techno-economic Modeling of Solar Silicon Molten Salt Electrolysis

JOM ◽  
2020 ◽  
Vol 73 (1) ◽  
pp. 233-243
Author(s):  
Aditya Moudgal ◽  
Sarat Buasai ◽  
Yi Jie Wu ◽  
Alexander McMahon ◽  
Jacob M. Hazerjian ◽  
...  
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Molten Salt ◽  
Economic Modeling ◽  
Element Analysis ◽  
Molten Salt Electrolysis ◽  
Solar Silicon
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