Extract Gold from Waste PCBs in a Low Cost, Sustainable Way
A Method for Recovering Gold from a Printed Circuit Board
Tags: National Taiwan University, Taiwan, Science & Exploration, Energy & Environment
This technology recycles gold from waste PCBs using a low-cost, low-pollution method involving ammonium thiosulfate and hydrogen peroxide, avoiding toxic acids like aqua regia. Over 95% of gold is recovered from PCBs, significantly reducing environmental impact. The process maintains waste liquor at a neutral pH, further minimizing pollution. This innovative method outperforms traditional gold recovery techniques, offering a sustainable solution to electronic waste recycling.
IP Type or Form Factor: Patent Granted; Process & Method
TRL: Not specified
Industry or Tech Area: Mining & Precious Metals; Circular Economy & Waste Upcycling
![A Method for Recovering Gold from a Printed Circuit Board](https://substackcdn.com/image/fetch/w_720,c_limit,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F8dd04bd2-620a-4ab0-982d-dc0ca7d5c54d_1024x1024.jpeg)
![A Method for Recovering Gold from a Printed Circuit Board](https://substackcdn.com/image/fetch/w_720,c_limit,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F0b3550b3-625c-4068-b9b4-a2fed94453de_478x377.png)