Method for efficiently recovering palladium from black gold powder

The invention provides a method for efficiently recovering palladium from black gold powder. The method comprises the following process steps of: leaching platinum and palladium in the black gold powder by using nitric acid according to a liquid-solid ratio of 4:1; after solid-liquid separation of nitric acid leaching, adding a palladium collecting agent into the nitric acid leaching solution at normal temperature, and collecting and precipitating palladium in a liquid phase in a complex form, namely a crude palladium salt; calcining the crude palladium salt at a high temperature of 580-620 DEG C, performing dissolving by using a chlorination method, and precipitating and recovering palladium in an ammonium chloropalladate form; repeatedly chlorinating and precipitating the ammonium chloropalladate to produce a high-quality crude ammonium chloropalladate intermediate product; complexing the ammonium chloropalladate by using ammonia water, performing filtering, adding hydrochloric acidinto the filtrate for pre