| 摘要 |
<p>PURPOSE:To recover platinum from the soln. of hydrochloric acid contg. iron by specifying the concn. of ammonium chloride in the soln., forming the precipitate of the complex salt of platinum and filtering off the precipitate. CONSTITUTION:By a method for recovering platinum in ferrite scrap, platinum in the soln. of hydrochloric acid contg. iron is recovered. For this purpose, ammonium chloride is added thereto, and the concn. of the ammonium chloride in the soln. is regulated to >=130g/l to form the precipitate of the complex salt of platinum. The precipitate is filtered off. In this way, expensive platinum which is a rare metal can be recovered.</p> |
