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extracting valuable metals from catalysts

     

Waste catalyst recycling and utilization methods should be selected based on factors such as the composition, amount, types of carriers, the value, recovery rate of the recovered materials, as well as the company's equipment technology capabilities and recycling costs. The main methods for extracting valuable metals from copper-containing waste catalysts are dry methods, wet methods, and combined dry-wet methods.

1、Dry Method: Generally, waste catalysts are mixed with reducing agents and fluxing agents, placed in a roasting furnace, and heated to melt the metal components through reduction or melting. The metal or alloy is then recovered for reuse as either an alloy or raw material, while the carrier combines with the fluxing agent to form slag, which is disposed of. Common dry methods include oxidative roasting, sublimation, and chloride volatility.

2、Wet Method: Use acids, bases, or other solvents to dissolve the main components of industrial waste catalysts. The filtrate is purified and separated to obtain insoluble sulfides or metal hydroxides. After drying, further processing is carried out as needed to produce final products.

3、Combined Dry-Wet Method: Tantalum catalysts with carbon as the carrier are difficult to dissolve directly due to the strong adsorption capacity of carbon. This method does not yield ideal results regardless of the approach used.

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