Method for ion exchange and separation of sodium and potassium |
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| 申请号 | JP88390 | 申请日 | 1990-01-05 | 公开(公告)号 | JPH03205315A | 公开(公告)日 | 1991-09-06 |
| 申请人 | Natl Inst For Res In Inorg Mater; | 发明人 | KOMATSU MASARU; FUJIKI YOSHINORI; SASAKI TAKAYOSHI; | ||||
| 摘要 | PURPOSE: To efficiently separate and recover sodium and potassium in high purity by subjecting an aqueous solution containing sodium and potassium to selective ion exchange of sodium with potassium using a specific titania hydrate, then desorbing and separating sodium and potassium. CONSTITUTION: Metals of sodium and potassium are separated from an aqueous solution containing the aforementioned metals. In the process, sodium and potassium are subjected to selective ion exchange using a titania hydrate (TiO 2 .nH 2 O; n is 1-2) obtained by carrying out potassium removing treatment of potassium titanate and reacted at 25-80°C to desorb and highly purify sodium and potassium. The aforementioned potassium titanate is obtained by melting and cooling a raw material mixture containing at least TiO 2 and K 2 O or K 2 CO 3 . The above- mentioned potassium titanate may be any of powdery, granular or fibrous substances if they are crystalline. A fibrous substance is preferred in aspects of easy handling. K 2 MoO 4 is added to the raw material mixture in order to provide the fibrous substance. COPYRIGHT: (C)1991,JPO&Japio |
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