发明名称 |
HYDROMETALLURGISCHE GEWINNUNG VON TECHNISCHEM MOLYBDAENTRIOXID AUS MOLYBDAENITKONZENTRATEN |
摘要 |
<p>An improved hydrometallurgical method is provided for producing technical grade molybdic oxide from molybdenite concentrates. According to this method, the molybdenite concentrates are leached in an acid medium having a nitric acid concentration between about 25 gpl and about 50 gpl and an initial sulphuric acid concentration of nil to about 750 gpl, under oxygen pressure of about 100 - 250 psig and at a temperature above 115 DEG C so as to produce technical grade molybdic oxide having not more than 0.1% sulphur. Then a liquid-solid separation of the reaction mixture is effected and the obtained leach liquor is recycled back to the leaching stage optionally after partial neutralization with a basic reagent. The solid is washed and recovered as technical grade molybdic oxide.</p> |
申请公布号 |
DE2546425(A1) |
申请公布日期 |
1976.04.29 |
申请号 |
DE19752546425 |
申请日期 |
1975.10.16 |
申请人 |
NORANDA MINES LTD. |
发明人 |
G.E. KERFOOT,DEREK;W. STANLEY,ROBERT |
分类号 |
C01G39/00;C01F11/46;C22B34/34;(IPC1-7):C01G39/00 |
主分类号 |
C01G39/00 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|