Gold extraction from transistors with iodine. Part 1 of 2. Hi! Today you can
see how I'm extracting gold from transistors prepared in the previous
video. 300g of de-capped transistors are placed in a beaker.
The leaching solution is prepared in a separate flask.
First, 70g potassium iodide, are added,
followed by 30 grams of crystal iodine addition
then 200 milliliters distilled water are added and the flask is shaken until the
iodine dissolves
Transistors are covered with the leaching solution and the beaker is shaken.
since this transistors have very thin plating, the leachant with such
concentration takes about four to five minutes to fully strip the gold
when the leaching is complete the leaching solution is decanted back into
the flask
the leached transistors are washed with distilled water which is combined with
the leachant in the flask
the rest of the transistors are weighted
de-plated transistors are moved into an empty container and the rest of the
transistors are added to the beaker
same procedure transistors are covered with the etching solution and the beaker is
shaken
since the leaching solution was diluted with the washing water it took a bit
longer to dissolve the gold
once the gold is stripped, the leachant and the washing waters are collected
in the flask
In a nutshell: A total of 620 grams de-capped transistors were
stripped in under 15 minutes. I found this process to be very efficient when
dealing with magnetic gold-plated scrap. Speed, low toxicity, selectivity and
reagents regeneration are some of the advantages it offers. You can see the
precipitation and melting of the gold in the next video. Thanks for watching!
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