Picture of Gold recovery correctly

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.


*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
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Step 1: SAFETY FIRST, Always.

Picture of 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.

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klamp541 year ago
Will this work with gold on magnetic based parts ?
I have some old glass resistors from 70's, a few pounds anyway, I'd like to know before I mess it up.
Railes (author)  klamp541 year ago
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.
AneelC1 month ago

Our experiment color turns green when we added sol of HCl , H2SO4 and water. Does this mean gold is already separated in this process ??? We use gold pins obtained from processor

AneelC1 month ago

Our experiment color turns green when we added sol of HCl , H2SO4 and water. Does this mean gold is already separated in this process ??? We use gold pins obtained from processor

Ronnie47911 month ago
Railes, not sure if you are keeping up with these postings.
But, I have done some gold recovering and one issue I'm having is the gold is so fine it goes through the filter paper.
So, is there a way to recover the fine gold that is in the muratic acid and hydrogen peroxide mix ????
Any help will be nice....
Thanks, Ronnie
Cryxis993 months ago

I will be doing this for a school experiment and was wondering where to take the waste, would a normal waste disposal place accept the glass jars full of acid and metal or are there specific places to take this acid?

Also when combining the muratic acid and hydrogen peroxide about how violent is the reaction? would I be able to do that in a fume hood?

PopsicleGhoul3 months ago

Wow! Super great Instructable! I am currently stripping the gold foils from my RAM chips using a 10:1 H202:H2S04 mix. I may try your method of further refining the gold once that finishes.

Dmytro K4 months ago

Hi I was wondering if you process the gold plated parts,and the computer chips magnetic and non magnetic.If you do what method do you use,Aqua regia?,reverse electroplating?One last thought how do you feel this method compares to Aqua Regia for dissolving the gold?Also very good instructable.Clear,and to the point.

Powersb2 years ago
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?

If you don't know the difference between baking soda and sodium bisulfite, you need to keep away from all chemical compounds.

Railes (author)  num1bandit1 year ago
no baking soda is calcium carbonate. and yes you can use pottassium metabisulfite.
aka ph down?
Railes (author)  Powersb2 years ago
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 ..
bjawed15 months ago

Will this method work on gold plated/polished pens,paper holders and other stationary accessories? Please respond as i am going to start this tommorow after i buy all the chemicals tonight.Will i have to amend the first and the second bath in any way as i'm not recovering gold from computer chips rather items that are completely gold plated.Though the base metal might be something else which i'm not sure of.Will this work?

cdillard21 year ago
Just found an earlier post, and it says that only sodium BISULFATE 99.5% and up will drop the gold. So this means my 93% pool stuff won't work???
camk cdillard25 months ago

sodium metabusulfite or SMB can be found at any home beer making outlet

dmallon19 months ago

about how much did all the materials cost?

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jarroyo410 months ago
Hey I really enjoyed this instructable cant wait to start the process myself...I was curious if you have created an instructable for recycling the acids if so how can I find it?
Dr.Bill11 months ago

jpacheco77711 months ago
Gold refining
cdillard21 year ago
13, 1:08 PM.jpg
cdillard21 year ago
Hello, I was wondering if this SODIUM BISULFATE will work because it says its only 93.2%???
It says 99.9% in instructions, will this still do the trick?? Please respond back here and can you email me also please INCASE I don't get it here at thanks so much
zzz11 year ago
This is awesome!
Will it also work on gold-plated coins?
Help will be much appreciated
num1bandit1 year ago
i thank you for the last steps that helped me get rid of the milky green soultion on the bottom of my plastic jugs
i added to much sodium the 14 kt tester took out all the impurities again i thank you without your help id still be sifting lol
Railes (author)  num1bandit1 year ago
so you were able to locate your problem areas and workout a solution? let me know if you any questions.
yes i have a great deal of ceramic chip pent pros 486 and others whats mt best way to recover the gold refinery?
Railes (author)  num1bandit1 year ago
use the same process for the ceramic chips, use a fishtank heater to warm your solutions instead of direct heat to the glass
.for the mapp gass, goto the local hardware and get a pack of fire bricks, also buy 50 mule team borax, hollow a small pit on the firebrick then melt the borax on the brick till it gets glassy. walla instant flux and instant melting dish.
heating inside dish or out side does it matter
Railes (author)  num1bandit1 year ago
those were ment to heated from the outside, not recommended for the type of melting you'd need.
this one is open
finished product
i have 32 maric and 72 percent nitric any good uses?
Do you have to nutrualize the acid before adding stump out? Let me know thanks
well i did
What did you use to neutralize acid if dont have access to urea
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