| 摘要 |
<p>PURPOSE:To easily recover a noble metal by immersing a substance to be subjected to noble metal recovery which is formed by joining a coating material composed of noble metal component to a base material by a glass component in a fluorine-containing solution to separate the noble metal component from the base material. CONSTITUTION:At the time of recovering a noble metal from a substance to be subjected to noble metal recovery which contains a glass component used for joining a coating material composed of noble metal component to a base material, this substance for recovery is immersed in a fluorine-containing solution, by which the glass component part is etched. Further, it is preferable to use NH4HF2, NaHF2, KHF2, etc., as the above fluorine-containing solution, and the concentration is regulated to about 2-4%, and, if necessary, heating may be carried out. By this method, the noble metal component part can be stripped from the base material, and the separated noble metal component is recovered and refined by the methods fitted to the component and can be effectively utilized.</p> |
