Patent ID: 7744814

Claim:
A method for producing a magnesium—lanthanum praseodymium cerium intermediate alloy, characterized in that: the magnesium—lanthanum praseodymium cerium intermediate alloy is obtained by using an incomplete dehydrated lanthanum praseodymium cerium chloride and a magnesium chloride having 2 or less crystalline waters as raw materials, and adding the lanthanum praseodymium cerium chloride and the magnesium chloride in a mass ration of 1: (1.5-5) during an electrolysis performed under the following condition: a graphite crucible is used as an anode, and a molybdenum bar is used as a cathode; the magnesium chloride, the lanthanum praseodymium cerium chloride, and potassium chloride are added into the graphite crucible such that the mass ratio of the magnesium chloride: the lanthanum praseodymium cerium chloride: potassium chloride is 5: (40-35): (55-60); the electrolysis temperature is 800-900° C., the cathode current density is 10-30 A/cm 2 , and the distance between the electrodes is 4 to 8 cm.