Title: Neodymium chloride electrolytic and vacuum distillating method to manufacture metallic neodymium
Application Number: 86100333 Application Date: 1986.01.21
Publication Number: 1012494 Publication Date: 1987.08.05
Approval Pub. Date: Granted Pub. Date: 1990.01.24
International Classifi-cation: C22B59/00,C25C3/36
Applicant(s) Name: Beijing Non-ferrous Research General Inst. Address:
Inventor(s) Name: Li Zongan, Li Zuoshun
Attorney & Agent: MU ZONGXU YU BAOYU
Abstract:
     This is a technique of manufacturing neodymium-magnesium alloy by electrolytic method, then distillating the alloy in vacuum to get the metallic neodymium. The optimum conditions of the manufacturing process are as follows: the electrolyte is made up of dehydrated neodymium chloride and potassium chloride, and the neodymium chloride retains 18-26% wt. of the electrolyte in the electrolytic procession, and the electric current density is 2.7 A per square centimeter to 3.8 A per square centimeter, the temperature of electrolysis is 850-870 deg.C. The pressure of distillating magnesium in the distillating cage is lower than 1.33x0.1 Pa, the temperature of distillating is 850-870 deg.C. This technigue for producing neodymium is low in cost, easily operated, the magnesium and other waste materials can be recovered for reuse, the technological process is a closed circulation without environment pollution.
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