| Dissolution of precious metals is one of indispensable steps for their following purification. The present dissolving techniques include atmospheric pressure-acid dissolution, high pressure-acid dissolution, active dissolution, electrochemical dissolution, chlorination dissolution, alkali fusion，etc. However, these techniques have some disadvantages, such as long period of dissolution, high consumption of acid and energy, complicated operations, a large number of retuning charge, severe environmental pollution and low efficiency of dissolution. Therefore, it is necessary to develop a new high efficiency and clean technique to dissolve precious metals. Although some high efficiency and clean dissolving techniques have been experimentally explored, they are still unacceptable for the large scale industrial application. In this article，the development of dissolving techniques for precious metals and their advantages and disadvantages are described and discussed. In addition, the development trend of the dissolving techniques in the future is also proposed. |
