palladium extraction from catalytic converters

{"cid":"91199936","title":"TWC Catalyst for Gasoline Engines (Platinum-Palladium): Reduces Gasoline Sulfur","imgUrl":"https:\/\/img.silkroadsl.com\/nimg\/41\/12\/69e2b3317998ee6542cb5d092969-200x200-1.jpg","attrs":{"Price":"$20\/piece-$100\/piece","Brand Name":"Grace","Model Number":"G-70054","Minimum Order Quantity":"50 PCs","Delivery Time":"10-30days","Certification":"ISO9001\/ISO14001","Place of Origin":"Jiangsu-China","Payment Terms":"L\/C, D\/A, D\/P, T\/T, Western Union, MoneyGram","Supply Ability":"10000PCs\/per month","Packaging Details":"wooden box, Carton+Palletize","Color":"White","Type":"Auto parts","Material":"Cordierite\/Silicon Carbide\/Metal","Size":"Customers' Requests","Shape":"customized","Application":"All on-road & off-road vehicles","Product name":"Three-way catalyst.","Package":"wooden box, Carton+Palletize","Sample":"available","Cell density":"100\/200\/300\/400\/600cpsi","Shipping type":"By DHL, Fedex, Sea, Air","Feature":"Long Working Life, High Temperature Resistance","Content":"95%-99.8%","Emission standard":"Euro 2\/3\/4\/5\/6 , Euro\u2161\/\u2162\/\u2163\/\u2164\/\u2165"}}

{"cid":"91221837","title":"3.5MPa Pressure 150-200 M2\/g Surface Area Selective Hydrogenation Catalyst For Optimal Performance","imgUrl":"https:\/\/img.silkroadsl.com\/nimg\/59\/cc\/bcea519add407002b0f2fe76b6d3-200x200-1.jpg","attrs":{"Brand Name":"C2 Selective Hydrogenation Catalyst","Model Number":"KMH-02","Place of Origin":"CHINA","Selectivity":"80%","Particle Size":"3-4.5 Mm","Pore Volume":"0.85-0.95 Cm3\/g","Surface Area":"150-200 M2\/g","Shape":"Spherical","Pressure":"3.5MPa","Active Metal":"Palladium","Support Material":"Alumina"}}