Heraeus Precious Metal Technology (China) Co., Ltd.

Chen Chen

Bin Zhang

A method for recovering a precious metal from a precious metal-containing waste catalyst includes the following steps: i) at least partially dissolving a precious metal-containing waste catalyst in an alkaline aqueous solution; ii) performing filtering to obtain a precious metal-containing filtrate and a precious metal; iii) treating the filtrate with a reducing agent; and iv) separating the precious metal from the filtrate after treatment, wherein step iii) is performed under a pressure of 8-12 bar at a temperature of 190-210° C. for 2-4 h. The method provided in the present invention has a simple process and a high recovery rate. The filtrate obtained from separation comprises a precious metal of 1 ppm or less by weight.

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Nanjing, China

Chen Chen