发明名称 |
PROCESS FOR TREATING RARE-EARTH ORES |
摘要 |
1. A method of treating an ore containing lanthanides and yttrium, including a first stage comprising grinding the ore, followed by a second stage comprising reacting the ground ore with a concentrated aqueous alkali metal hydroxide solution at an elevated temperature, characterised in that grinding is carried out in the presence of a concentrated aqueous alkali metal hydroxide solution at a temperature of up to 100 degrees C. |
申请公布号 |
DE3664929(D1) |
申请公布日期 |
1989.09.14 |
申请号 |
DE19863664929 |
申请日期 |
1986.09.08 |
申请人 |
RHONE-POULENC CHIMIE |
发明人 |
FABRE, FREDERIC;TOGNET, JEAN-PAUL;MAGNIER, CLAUDE |
分类号 |
C01F17/00;C22B59/00;(IPC1-7):C22B59/00 |
主分类号 |
C01F17/00 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|