WARNING! This video is intended for demonstration purposes only! Trying to
duplicate the shown procedures may result in serious injury or even death!
Hi! This is a brief overview of the gold extraction process from 2.5kg
high yielding ceramic CPUs and ICs and 2kg low yielding EPROMs
The chips will be washed in a bath of molten lead and silver.
Dore after cupelling
Dore digestion in nitric acid
after the silver dissolution in nitric acid I dissolved the remaining gold in aqua regia
The resulting gold chloride solution was de-NOx-ed, diluted with
water and filtered. Then the gold was precipitated by adding solution of
SMB and washed in concentrated hydrochloric acid in distilled water.
Melting the recovered and refined gold
The result is 29.60g pure gold.
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