Electrolytic production of neodymium metal from a molten chloride electrolyte

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U.S. Dept. of the Interior, Bureau of Mines , Washington, D.C. (2401 E Str. N.W., MS #9800, Washington 20241-0001)
Neodymium -- Electrometallurgy., Electrolyte solutions., Chlor
Statementby M.F. Chambers and J.E. Murphy.
SeriesReport of investigations ;, 9391, Report of investigations (United States. Bureau of Mines) ;, 9391.
ContributionsMurphy, J. E.
Classifications
LC ClassificationsTN23 .U43 no. 9391, TN799.N47 .U43 no. 9391
The Physical Object
Pagination7 p. :
ID Numbers
Open LibraryOL1861912M
LC Control Number90019519

Neodymium was electrowon from a NdCl3-KCl electrolyte by using molten-metal cathodes. High current efficiencies were obtained when electrowinning into Mg-Zn or Mg-Cd cathodes.

The Mg-Cd cathode performed best because the metal separated cleanly from the electrolyte, and the neodymium obtained after vacuum distillation was of higher :// The U.S.

Bureau of Mines conducted experiments on electrowinning of neodymium metal by Electrolytic production of neodymium metal from a molten chloride electrolyte book a molten-metal cathode at deg.

C and an electrolyte of 50 mol pct ndcl3 (neodymium chloride) and 50 mol pct kcl (potassium chloride). The molten-metal cathodes were alloys of magnesium and zinc or magnesium and :// Get this from a library. Electrolytic production of neodymium metal from a molten chloride electrolyte.

[M F Chambers; J E Murphy] Get this from a library. Electrolytic production of neodymium metal from a molten chloride electrolyte. [M F Chambers; J E Murphy; United States. Bureau of Mines.] This study deals with research on the reduction process of neodymium oxide by molten salt electrowinning.

Neodymium fluoride and lithium fluoride electrolyte were used for feed stock of electrolyte and neodymium oxide was added as precursor. Cell current was confirmed that cell potential was applied as constant potential of ://   ELECTROLYTIC PRODUCTION OF NEODYMIUM METAL FROM A MOLTEN CHLORIDE ELECTROLYTE By M.

F: Chambers 1 and J. Murphy 2 ABSTRACT The U.S. Bureau of Mines conducted experiments on electrowinning of neodymium metal by using a molten-metal cathode at C and an electrolyte of 50 mol pct NdCl3 (neodymium chloride) and ELECTROWINNING OF NEODYMIUM FROM A MOLTEN OXIDE-FLUORIDE ELECTROL VTE By D.

Dysinger1 and J. Murphr ABSTRACT In this U.S. Bureau of Mines study, neodymium metal of pct purity was prepared by electrolysis of Nd20 3 salts dissolved in a molten fluoride electrolyte. The metal was electrowon in a molten state Production of rare earth metal using molten salt of neodymium chloride produced in hydro- or pyrometallurgical recycling processes of NdFeB magnets.

governing the electrolytic reduction of B.M.F. Chambers, Electrolytic Production of Neodymium Metal From a Molten Chloride Electrolyte () Google Scholar 3. Pernel, J. Serp, M. Ougier, R. Malmbeck, E. Commission, Electrochemical investigations of La, Nd and Am in molten chloride salts in view of Am/Ln ://   "Neodymium metal of percent purity was prepared by electrolysis of Nd2O3 salts dissolved in a molten fluoride electrolyte.

The metal was electrowon in a molten state at current efficiencies of 50 to 60 percent. Oxygen and carbon were the major impurities detected in the There is extensive co-deposition of neodymium with the magnesium with the molten tin cathode, but when magnesium metal was equilibrated with the MgCl2/NdCl3/NdOCl melt only wt% of neodymium /_Electrodeposition_of_Metals_from_Molten_Salts.

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Introduction. Neodymium production has increased due to the demand for Nd-Fe-B permanent magnets. However, neodymium oxide like the other rare earth oxides are amongst the most stable oxides known in nature and their reduction to a metal is often very difficult.The electrolytic production of neodymium metal from neodymium oxide is considered an attractive method.

Electrolytic production of metallic neodymium is carried out in fused neodymium fluoride salts containing neodymium oxide. Two major challenges pertaining to neodymium production in fluoride salts are a) low solubility of neodymium oxide in fluoride melt, b) possibility of anodic gas evolution (CO, CO 2, CF 4, C 2 F 6).In this study, iron is used as a reactive anode in the electrolysis process Liquid metal cathodes were first introduced to MOE to address the above challenges.

Approximately 2 years ago, we selected Ti–BF slag (CaO–MgO–Al 2 O 3 –TiO 2 –SiO 2) as the electrolyte and molten Fe as the liquid metal cathode to extract Ti. Depolarization noticeably appeared in the molten Fe cathode in Electrolytic production of neodymium metal from a molten chloride electrolyte.

Abstract "The U.S.

Description Electrolytic production of neodymium metal from a molten chloride electrolyte EPUB

Bureau of Mines conducted experiments on electrowinning of neodymium metal by using a molten-metal cathode at deg. C and an electrolyte of 50 mol pct ndcl3 (neodymium chloride) and 50 mol pct kcl (potassium chloride). Production from Mixed Ilmenite and Titanium Dioxide by Direct Electrolytic Reduction in Molten Calcium Chloride Electrolyte”, The 8th Pacific Rim International Conference on Advanced Materials and Processing (PRICM8), p.

– () 5. Mrutyunjay Panigrahi, Atsushi Iizuka, Etsuro Shibata, and Takashi Nakamura, “FeTi Alloy The positive metal ions are present in the electrolytic solution.

They can form a solid or molten metal on the cathode when electrical current is applied to the apparatus. For example, in the electrolytic purification of aluminum, aluminum ions from the electrolyte will be reduced at A process based on molten salt electrolysis for producing pure rare earth metals is disclosed.

This process is the direct electrolytic deposition of a rare earth metal such as neodymium, from a molten salt cell containing a mixture of electrolytes and a salt of neodymium, onto a liquid magnesium cathode forming an intermediate alloy.

The intermediate alloy is distilled to isolate the neodymium   Keywords: rare earth, neodymium, molten salt electrolysis, neodymium production Abstract The development of the Chinese neodymium oxide electrolysis which replaced the chloride and fluoride electrolysis in the s is described.

Industrial data of the running neodymium electrolysis are given with scientific research references about the Electrolytic process for the production of neodymium metal or neodymium metal alloys Issued June 2, United States Electrolysis of hybrid fluoride-chloride bath is shown with Both a galvanic cell and an electrolytic cell use metal rods in molten solutions.

Question 7 7. A lab book shows the setup of an electrolytic cell, but the anode and cathode aren't :// Publisher: [Washington, D.C. ( E Str. N.W., MS #, Washington )]: U.S.

Dept. of the Interior, Bureau of Mines,   U.S. Pat. 4, discloses a process and an apparatus for producing a neodymium-iron alloy by electrolytic reduction of neodymium fluoride in a bath of molten electrolyte, consisting essentially of % by weight of neodymium fluoride, % by weight of lithium fluoride, up to 40% by weight of barium fluoride and up to 20% by weight The Electrolysis of Molten Sodium Chloride.

Metallic sodium, Na, and chlorine gas, Cl 2, are used in numerous applications, and their industrial production relies on the large-scale electrolysis of molten sodium chloride, NaCl(l).The industrial process typically uses a Downs cell similar to the simplified illustration shown reactions associated with this process are:   3 olysis: It is a chemical process where a substance in its molten state or in an aqueous solution is decomposed by the passage of electric current.

olyte: A compound that allows electric current to pass through itself, when either in a molten state or in an aqueous solution, is called an Written to record and report on recent research progresses in the field of molten salts, Molten Salts Chemistry and Technology focuses on molten salts and ionic liquids for sustainable supply and application of materials.

Including coverage of molten salt reactors, electrodeposition, aluminium electrolysis, electrochemistry, and electrowinning, the text provides researchers and postgraduate   The present invention generally relates to the production of magnesium metal by an electrochemical reaction in an electrolytic bath.

More particularly, this invention relates to an improved electrochemical process of this type, wherein the process is carried out in a molten salt flux which includes a magnesium compound, such as magnesium oxide, and a rare earth chloride, such that the Neodymium metal of percent purity was prepared by electrolysis of Nd2O3 salts dissolved in a molten fluoride electrolyte.

The metal was electrowon in a molten state at current efficiencies of 50 to 60 percent. Oxygen and carbon were the major impurities detected in the :// Magnesium oxide or suitable precursors of magnesium oxide may be dissolved in a molten salt bath comprising magnesium cations, rare earth element cations and fluoride anions and the resultant magnesium containing bath electrolyzed so as to produce a magnesium-rare earth element alloy.

Details Electrolytic production of neodymium metal from a molten chloride electrolyte PDF

While such magnesium-rare earth element alloy has utility as is, electrolytic and chemical practices are also   molten fluoride electrolyte onto a molybdenum electrode.

More specifically, to investigate the reaction mechanism of Nd deposition, which would favour more metal neodymium remaining on the electrode surface, better control of the process, greenhouse gas emission reduction during electrolysis, and better Nd deposition efficiency.

Electrochemistry of rare earth fluoride molten salts 44 Journal of Alloys and Compounds, () JA LCOM Electrochemistry of rare earth fluoride molten salts A. K a n e k o, ://Journal Article: Preparation of the first electrolytic plutonium and of uranium from fused chlorides  molten salt electrolysis, it is not only determined with those factors, but also a decomposition potential.

Molten salt or fused salt is used as an electrolyte, because it has an excellent electric conductivity, heat capacity, and can also act as a solvent. This work presents a comprehensive study on thermodynamic considerations of molten salt?article=&context=grad_rsch.