发明名称 |
VERFAHREN ZUR HERSTELLUNG VON TANTAL-KONZENTRATEN |
摘要 |
<p>In a process for producing tantalum concentrates from ores containing tantalum oxides, tantalic acid or its salts together with rutile type titanium dioxide in mixed crystals, the ores are treated in a sulfuric acid of a concentration not lower than 50% by weight with heating at a temperature from 200 DEG C. to the boiling point of said sulfuric acid, and then the above-treated products are treated with a reducing agent in an aqueous solution of sulfuric acid of a concentration lower than 50% by weight to dissolve the titanium component to thereby obtain tantalum concentrates as solid products.</p> |
申请公布号 |
DE3022874(A1) |
申请公布日期 |
1981.01.22 |
申请号 |
DE19803022874 |
申请日期 |
1980.06.19 |
申请人 |
MITSUBISHI CHEMICAL INDUSTRIES,LTD. |
发明人 |
TAMARU,AKIO;KUTSUNAI,MINORU |
分类号 |
C22B26/20;C01G35/00;C22B34/20;C22B34/24;(IPC1-7):C22B34/24 |
主分类号 |
C22B26/20 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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