From Mother Board


GOLD in MOTHERBOARD
Let's see how to extract gold from old motherboards.
NOTE: There is very little content of GOLD in a Motherboard



Gold is found in various parts of a motherboard: IDE connectors, PCI Express slot, PCI, AGP, ISA, and other ports, jumper pins, the processor socket, and DIMM slots. All of these connectors are often covered with a fine layer of gold a few microns thick, deposited by plating.


This is how an individual motherboard pins covered with GOLD

 

Note: Information and process recovery details are mentioned by doing research on related field to the best of our knowledge.

So, request to all is to be cautious during the recovery since you are dealing with all type of basic as well as hazardous chemicals. So you will be held responsible if the method goes wrong. So take care when you proceed.
STEPS taken to start the Recovery process:

1)      By using Pliers/cutter remove all the pins from Motherboard
2)      May be at least 10 motherboards are required to perform the recovery process.
3)      To recover the few micrograms of gold deposited on the pins, we’re going to use an electrolytic cell. The bath consists of a 95% solution of sulfuric acid (H2SO4). The cathode is lead and the anode is copper. The pins are placed in the copper, which we’ve formed into a rectangle basket shape.
4)      By running an D.C. current through the cell, using an ordinary battery charger, the copper in the anode (and in the pins) dissolves and is deposited on the lead cathode. The gold, detached from the copper, forms a sediment at the bottom of the cell.
5)      Once all of the gold has detached from the pins, the bath is allowed to settle. Then, we recover as much of the sulfuric acid as possible, before diluting what remains in the bottom of the electrolytic cell.
6)      Always take care while you pour acid into water, the first drops of water that touch the surface of the sulfuric acid will immediately be vaporized and could cause acid splashes.
7)      We end up with a diluted solution of sulfuric acid, various metals (including gold), and waste that then needs to be filtered. Why not just filter the solution directly, without diluting it? Because paper filters don't stand up well to strongly concentrated sulfuric acid.
8)      What remains in the filter is a mixture of various metals and impurities. We now dissolve everything in a mixture of hydrochloric acid at 35% and chlorine bleach (sodium hypochlorite) at 5%, in a proportion of 2 to 1.
9)      Careful! The reaction is highly exothermic and produces chlorine, a highly dangerous gas.  The chlorine produced by mixing hydrochloric acid and chlorine bleach is what will dissolve the gold to form gold (III) chloride.
10)  Now, all we need to do is filter everything once again. The filter will retain all the impurities, leaving only a gold (III) chloride solution.
11)  To recover the metallic gold, we now need to precipitate the gold that’s in solution. For that, we use powdered sodium metabisulfite. In the presence of water, the sodium metabisulfite produces sodium bisulfite.
12)  We let the solution settle, and then we recover the brown powder collected at the bottom of the beaker. We have to be careful not to lose any--that’s metallic gold
13)  The melting point of gold is around  1064° C (1947.52 °F),
        So an oxy-butane torch will do the job.
14)  And you will get Finally a Pure GOLD
Approximately 10 motherboards = 1gram of pure GOLD