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I will detail a SAFE process of turning old electronic parts into little round lumps of pure gold.  There are many tutorials that claim to offer methods of gold recovery such as "Cupellation"*.  These processes are DANGEROUS and put the user at the risk of inhaling vaporized metals.
No over the counter breather will protect you from these dangers; Only lab grade isolated breathing systems can protect against metal vapors.   ********************************** SEE HEALTH HAZARD ON STEP 6***************************************

**** a Side cautionary note,  This process is not suitable to purify Panned Gold or KARAT (Gold Alloyed with silver.) This Guide is best suited for gold plated or pure gold object.


THIS SHOULD ALSO NEVER BE ATTEMPTED INDOORS.

*Cupellation is a refining process in metallurgy, where ores or alloyed metals are treated under high temperatures and controlled operations to separate noble metals, like gold and silver, from base metals like lead, copper, zinc, arsenic, antimony or bismuth, present in the ore. The process is based on the principle that precious metals do not oxidise or react chemically, unlike the base metals; so when they are heated at high temperatures, the precious metals remain apart and the others react forming slags or other compounds

Step 1: SAFETY FIRST, Always.

In this instructable you will be working with basic house hold chemicals.  By themselves these chemicals can be fairly harmless.  The combination of such chemical which will be presented in this instructable can be EXTREMELY hazardous;  By such there are a couple of safety items which are not Optional.  THE FOLLOW ITEMS ARE REQUIRED.  FAILURE TO OBTAIN THESE ITEMS BEFORE HAND CAN POSSIBLY COMPROMISE YOUR HEALTH.  

Item # 1.

Breathing equipment.  You will need a chemical mask rated AT LEAST as a P100. If you dont know what a P100 rating means It is your responsibility to yourself to find out.

Item # 2
Heavy duty Gloves.  pvc or rubber is fine,  do not use Latex or Nitrile gloves.

Item # 3

Safety Glasses.  Any pair will work as long as It is safety rated and solvent rated.


Will this work with gold on magnetic based parts ? <br>I have some old glass resistors from 70's, a few pounds anyway, I'd like to know before I mess it up.
Hry<br>
No, ferrous metals will vastly reduce the effectiveness of chemical bath 1, the resulting pulp will not re-precipitate any gold I'm the final step. For magnetic conductors use Aqua Regina.
<p>I even filtered the gold and diluted it. About 50 ml of 50% of 1 g of EDTA was added to double the gold solution (filtered and decanted).</p>
<p>I have done test with EDTA ph 8 with ammonia and ammonia chloride and sea salt and test dissolved partly neutral gold at a ph (solution of 4). It turned yellow gold indicating that there was no nickel or other metals just gold. Another link said that 95-99.99% of cell phone cpu are gold with little lead, nickel, etc. If it was lead it would have turned I think white, Nickel (Purple), Chromium (Purple Cr3+), etc. I may buy on e-bay a very percise nickel test for liquids.</p>
<p>I am sorry about this question but I need to know. Just how many, let's say, SDRAM chips, would it take to pay for all of the equipment &amp; materials (including chemicals), just to get started? Allowing you enough pre-purchased equipment &amp; materials to use in the recovery of more gold at a profit. A close guesstimate will do fine.</p>
<p>the ratio I saw was around a gram per pound of fingers + boards.</p>
<p>In other words, people sell the scrap for way more than it is worth gold-wise, you'd need to find the scrap for 35-45 a pound max in order to make any money from the gold recovery effort if you were purchasing the scrap.</p>
<p>it is simple but for mor safty use dillute hydrochloric acid till 17%</p>
<p>good work</p>
You may want to clarify in step 5 that it is the circuit board fingers not yours. ...there are those people out there who will put their fingers into acid...
Bahahaha!!!! Right?!?!
<p>I have an antique gold plated cane handle. Will the process work for this item?</p>
<p>my first liquid was blue.what is my problem?</p><p>and what should i do with the deposit of it?</p>
I will help you<br>Contact me on WhatsApp<br>00923136437898<br>Yasir Bashir
<p>Hello Sir can this work for all CPUs ?...cause I have about 10kg of Computer CPUs</p>
<p>Hello Ubong01</p><p>can u give me details of cpu kinds, you have<br>you can e-mail me iftikharcomputer@yahoo.com</p>
<p>How do you recover the copper from the HCL, hydrogen peroxide and copper solution?</p>
<p>Just put a stainless steel butter knife in the solution for a couple of days. The copper will cement to the steel. Pull it out and rinse it off. Then you have pure copper.</p>
<p>Okey, I add SMB to the ''Yellow solution that contains gold'' and it went collorless, I left it over the night and nothing. What I should do now?! Did I add too much SMB, or it is because I need to heat it ? Please help. Thanks. </p>
<p>who can tell me where I can find those acids?</p>
Pool acid will do the trick.
Would it be viable to use a 66% acid as opposed to the 34%? If have both but I'm not sure if the 66% would be too strong?
Really interesting procedure (never seen anything like this). Can you use the same procedure for pins containing gold? Can I use potassium metabisulfite instead of sodium Bisulfite (i cant find any)?
sodium bisulfite aka baking soda right? <br>
no baking soda is calcium carbonate. and yes you can use pottassium metabisulfite.
baking soda is actually sodium bicarbonate NaHCO3 calcium carbonate is CaCO3 which is a lime not baking soda
aka ph down? <br>
<p>no, see above</p>
metamisulfate
<p>lol, not exactly, Folks, Baking soda is sodium bicarbonate. Calcium carbonate is chalk, dolomite, and many other things. Just because it has a Sodium or a carbonate in the name does not make everything baking soda. Anyone attempting this procedure really needs to know the difference, if you don't, then you need to do a little research until you do, otherwise you might nerve gas yourself or blow yourself up. If you're not familiar with chemistry, google solutions, reactions, precipitating metals and salts out of solution, chemistry safety procedures, molecular bonds, ions in solution, MSDS Safety information for every chemical you use or make. This is a process that requires some knowledge about what you're doing, it won't work if you don't, or it will backfire on you. Do your homework and you will have success, if you don't do your homework you will fail, so start googling :O)</p>
<p>no, not even close to the same chemical, baking soda is sodium bicarbonate</p>
<p>If you don't know the difference between baking soda and sodium bisulfite, you need to keep away from all chemical compounds. </p>
That shouldnt be an issue. Instead of creating sodium chloride. You would create potassium chloride the resulting exchance. Should create so2 gas. Lol give it a try, just dont hold your face over the beaker if you added distilled water ..
Lol... *dumps acids down drain* realizes he has metal pipes still... *pipes disappear*
I got two of 155 gram of melted cpu pins. Can i still use this process? Also i couldnt find klean strip muriatic acid, is 37% hcl from lab company ok?
Bom dia amigos estou precisando de ajuda para extrai ouro de placa dedos e processadores porem se possivel de agua regia um passo a passo com todos os quimicos.<br>Att.claudio
<p>this is should be fun, I'av made some collection. but looking a safe way of doing it.</p>
<p>I'm confused. My understanding was that only AR can dissolve gold. You are saying that gold can be dissolved with HCL and Clorox? I thought nitric acid was required?</p>
<p>bonide stump out is smb it is just coled by an name they used years ago. smb is not sodium bicarb &quot;baking soda&quot; i should know i am a patented publised scientist.</p><p>Ron Donahue and pk11195, patents BS/MS/MDs/PhD</p>
<p>I did all steps, tests were good, when melted I got glass not gold. please help</p>
You mentioned putting 3G of flakes into the solution... what was the weight of 24K gold of the finished product? Thank you for your time. ?
Help !!!! When i added some of smb the solution become clear and no ppt although solution contain gold
<p>Hello there, Can I use Sodium bisulfate NaHSO4 instead of Sodium Metbisulfite MBS (Na2S2O5)?</p>
<p>According to the MSDS, Bonide Stumpout is sodium metabisulfite, which is NOT the same compound as sodium bisulfate, but you are correct - sodium bisulfate cannot be substituted for Stumpout. Clorox bleach is sodium hypochlorite; sodium hypochlorate does not exist. </p>
<p>Railies thanks for this info, I have come back to this instructable many times. Question about how much peroxide to use? On the gold forum I have seen it mentioned several times that if you use more than 25% peroxide in the first bath you may loose gold in the solution. The instuctions say 50%! would it be better to lower that and use a bubbler?</p>

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Bio: I have been a refining consultant for 12 years,
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