| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To carry out a separation method for Au contained in an Au containing cyano solution, and a quantitative determination method for the Au contained in the Au containing cyano solution, in a relatively short period of time, to enhance safety for working, and to reduce a load of an exhaust gas treating device. <P>SOLUTION: An alkali agent is added to the the Au containing cyano solution to prepare an alkaline solution, and Zn is added to the alkaline solution to generate the first precipitate. The first precipitate is further dissolved in an aqua regia to generate a precipitate dissolved solution. A reductant is added to the precipitate dissolved solution to generate the second precipitate, and the second precipitate is heat-treated to separate the Au. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
