Prepn of lanthanum-rich rare-earth metal

Prepn of lanthanum-rich rare-earth metal

In the prepn, the melted electrolyte is a mixture of LiF in 10-30 wt% and RE floride in 70-90 wt% and the said RE floride includes the oxides of La, Ce, Pr and Nd, and calcium floride in 0-10 wt% maybe added into the melted salt. The cathode and anode current densities are 6-12 A/sq cm and 0.1-1.5 A...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Hauptverfasser: ZHIHONG ZHANG, LONGHUAI CHEN, ENBAO LU
Format: Patent
Sprache:eng
Schlagworte:
APPARATUS THEREFOR
CHEMISTRY
ELECTROLYTIC OR ELECTROPHORETIC PROCESSES
METALLURGY
PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY ORREFINING OF METALS
Online-Zugang:Volltext bestellen
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
Beschreibung
Zusammenfassung:In the prepn, the melted electrolyte is a mixture of LiF in 10-30 wt% and RE floride in 70-90 wt% and the said RE floride includes the oxides of La, Ce, Pr and Nd, and calcium floride in 0-10 wt% maybe added into the melted salt. The cathode and anode current densities are 6-12 A/sq cm and 0.1-1.5 A/sq cm separately. At the electrolyzing temp of 950-1060 deg.C, is added continuously the lanthanum-rich RE oxides of La, Ce, Pr and Nd or the lanthamum-rich RE carbonates. The present invention can produce lanthamum-rich rare-earth metal for negative electrode of nickel-hydrogen cell.