China Precious Metal Refining Technology And Equipment Leading Brand
Detailed News
Recovering Precious Metals from Spent Automotive Catalysts

     

This invention falls within the field of comprehensive utilization of precious metal secondary resources, and specifically relates to a method for recovering precious metals from spent automotive catalysts via a hydrometallurgical dissolution - stripping activation - hydrometallurgical dissolution process, which addresses the technical challenge of precious metal recovery from spent automotive catalysts.

The method is implemented through the following steps:

(1) Ball milling: Spent three-way catalysts (TWCs) are ball-milled to 200 mesh in a ball mill. Sampling and assay show the precious metal contents are 100–300 ppm platinum (Pt), 1500–2500 ppm palladium (Pd), and 100–300 ppm rhodium (Rh);

(2) Aqueous chlorination;

(3) Filtration;

(4) Stripping activation;

(5) Dissolution;

(6) Filtration;

(7) Iron powder reduction;

(8) Refining of platinum, palladium and rhodium.

The method has the following advantages:

It delivers high precious metal recovery rates, with platinum recovery exceeding 97%, palladium recovery exceeding 98.5%, and rhodium recovery exceeding 95%; it boasts a short production cycle and remarkable economic benefits; it is easy to operate, convenient for industrial scale-up, and features a more eco-friendly production process.

+8613303827570
Related Product
Related Video
Product Center
Related Cases
Contact Us
We'll get in touch with you right away to provide detailed product info and tech insights sincerely.