CPU-Processor Gold Recovery/Gold Extraction from CPUs/ Recover Gold from Processors

There are numerous methods for recovering CPU gold. Some people crush the entire CPU into powder and then separate the metals from the powder using density separation. However, in my view, this method is not optimal as it results in the loss of precious metals. CPUs contain gold, palladium, silver, etc. People normally think that you get only gold from the processors. It is not true. If you look at them closely, you will see MLCCs on them. MLCCs (Monolithic Ceramic Capacitors) contain palladium, silver, and gold.

 So, the best gold recovery method for CPUs and processors is to recover gold through aqua regia. You should first remove MLCCs from the processors and store these small capacitors safely for silver, gold, and palladium recovery in the future when they are in enough quantity. Now break the processors into smaller pieces with a hammer. Prepare the aqua regia solution. The aqua regia solution is one part nitric acid and three parts hydrochloric acid. You should use a heat-resistant glass pot to do so. First, put the broken processors in the pot, and then pour some aqua regia into it. The aqua regia solution will start dissolving pins, including gold. Do it in an open space or a properly ventilated room, and use safety gear.

 Separate the solution from the solids after the reaction has stopped completely. Now you need to neutralise this gold-bearing aqua regia solution. You can also use urea for this. Add some urea to the solution, and there will be a lot of fizzing. There will be lots of foam. After some time, the foam will disappear. Again, add some more urea to the solution. The foam will form on the surface and subside quickly. Keep repeating it till the foam starts taking longer to subside. If foams take too long to subside, stop adding urea to the solution. Now your solution is neutralized. Filter this solution and recover your gold with sodium metabisulfite (SMB).

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