PROCESS FOR REMOVAL OF THE CATALYTIC COATING MATERIAL FROM SPENT, DEFECTIVE OR UNUSED METAL SUPPORT CATALYTIC CONVERTERS

摘要

Process for recovering catalytic coating material from catalytic converters, catalytic material or catalytic assemblies where the catalytic coating material is bonded to a metal supporting structure, the process being carried out by contacting the catalytic coating material with nitric acid and/or a nitrate-containing chemical or material, applying heat, agitating the catalytic converters, catalytic material or catalytic assemblies being processed to dislodge the catalytic coating material, and rinsing the catalytic converters, catalytic material or catalytic assemblies with water to facilitate the removal of remaining catalytic coating material, and recovering ionic metal species dissolved by the nitric acid and/or nitrate-containing chemical or material.