Regeneration Method of Used 3-way Catalyst for Gasoline Engine Vehicle and Remanufacturing Method of Used Catalytic Converter

摘要

A regenerating method of a catalyst for a gasoline automobile catalytic converter and a remanufacturing method of the catalytic converter using the same are provided to reduce the disposal cost of waste and prevent the generation of environmental pollution by reducing the amount of the catalyst disused, recycle expensive precious metals from used catalysts, and replace the gasoline automobile catalytic converter at low cost. A regenerating method of catalyst for a gasoline automobile catalytic converter comprises: a catalyst recovering step of disassembling the gasoline automobile catalytic converter to recover the catalyst; a catalyst cleaning step of cleaning the recovered catalyst; and a catalyst activity correcting step of correcting the activity of the catalyst passing through the cleaning step. The catalyst cleaning step is selected from a step of cleaning the catalyst using steam, a step of performing ultrasonic cleaning of the catalyst using water, and a step of performing ultrasonic cleaning of the catalyst using a remanufacturing solution. The catalyst activity correcting step comprises: impregnating a surface of the catalyst with platinum, rhodium, palladium and cerium as catalyst activating components, or mixtures thereof, drying the impregnated catalyst at 120 to 180 deg.C for 2 to 5 hours; and firing the dried catalyst at 350 to 600 deg.C for 1 to 3 hours.