Gold Reduction with Oxalic Acid -Complete Process

Gold Reduction with Oxalic Acid -Complete Process


Hi everybody. In this video I will be demonstrating the
process of reducing gold from chloro-auric acid to produce very pure, four nines gold. Warning. The process shown in this video involves
highly corrosive acids and should only be done outside or in a fume hood. Using safety gear such as gloves, goggles
and a respirator is mandatory. Let me first begin by saying that I have slightly
altered the steps of this process. Namely, by adding the Oxalic acid to the gold
solution at the beginning of the process and
only then adjusting the acidity. Here I’m adding the Oxalic acid to the gold
solution and in the meantime the hotplate
is heating the boiling flask. All right, Let’s take a look at the apparatus. Here we have the boiling flask And a fitting to hold the “condenser” on the
left
and an “addition funnel” to the right. The arm on the left here is used to evacuate
fumes into the fume hood. Of course, once the reaction begins I’ll seal
the system with glass corks. Now I’m adding a concentrated Sodium Hydroxide
solution to the addition funnel,
so that I

could drip it slowly to the gold solution. As you can see, the gold solution is now slightly
boiling and the reduction starts before I
even added any Sodium Hydroxide. But without acidity adjustment we can keep
staring at the gold for a very long time… You can also see some brown Nitrogen Dioxide
fumes in the flask. This is mainly the result of decomposing residual
Nitric acid left from the original Aqua Regia
solution. OK… this may take a while… So let me fast forward. The main indicator for the reaction completion
is the color of the solution. As I add more and more Sodium Hydroxide, the
solution will eventually lose its red/orange
color and turn into a brownish black suspension, which actually is the gold being pushed out
of the solution. OK… seems like we’re all done here… The solution is now left cool back down.
Once it does, I will transfer both the gold

powder and the solution into a regular open
mouth beaker so that I could wash the gold
powder later. The beaker will be left to stand overnight
to allow the gold powder to settle nicely

to the bottom. The gold now sits pretty tight at the bottom
of the flask. Slowly, I will decant the

majority of the now waste solution in to another
graduated cylinder. The waste solution will later be filtered
to catch any gold particles that slipped through. Then I’ll begin the washing cycles which includes:
boiling the gold powder in Hydrochloric acid

then with ammonia and finally with distilled
water. Once that’s done, the gold powder will be
heated until it’s completely dry. And here it is, dry gold powder ready for
melt-down! And now… The fun part. The gold is clean….
The crucible is ready…
Let’s fire it up. OK… Seems like we’re ready to pour And there you have it.
Pretty cool huh…?
🙂 I Hope you’ve enjoyed this video. Please Comment,
Like and Subscribe.

100 Comments

  1. I saw video where the gold was placed into a rectangular crucible and left on a stove-type burner to reach 2000 degrees. Would that method also work with your gold power or should it always be done the way you did it here?

  2. Nice but know, is this economically viable? What is the price of all the inputs and what is the price of the final product? 

    I know that there are factories doing this but apparently they are not just after the gold but after all the precious metals on the electronic parts and pcbs.

  3. That's so cool, I need to try to do that with my mini forge and circuit board and doing stuff like that thanks for the inspiration. 🙂

  4. Excellent knowledge and process demonstration keep it up boss – can you specifically explain on when it is supposed to be hot and when cold thank you

  5. that's really interesting. I'm not in this business, but i wonder how much all this process costs (materials, electricity, etc) and how much you can take at the end. Can you give me a valutation? Thanks, nice videos

  6. About 30 grams from that it looks like to me spot is $1100- so depending on who you sell to is what you get for it I'd imagine?

  7. You can add dilute formalin to the aqua regia that dissolves the gold and other metals. Keep the solution overnight. The brown black sponge obtained can be purified with hot conc. sulphuric acid…………….leeplating,malacca

  8. you dont mention any oxalic acid or naoh concentrations . Also nothing said about the washing steps afterwards. Doesnt really help me

  9. Isnt the process way more expensive than the gold? I guess it would be a great long-term investment as gold will probably gain more and more value.

  10. "And now the fun part, after just 50hrs of work, $150 worth of chemicals, you now have a tic tac sized piece of gold, and one angry wife".

  11. I wanna try this but it seems like a lot of work + I don't have the materials and chemicals… probably in the future idk.

  12. Great tutorial and very informative. Take so much trouble to make some gold, if you don't get a very good recycle supplies, its not worth that time to refine some gold. But really this is good education!

  13. For anyone curious what the value of that gold is: the answer is NO MORE THAN $127.68. In part 1 he mentions that he expects to make about 1-3 grams from the process. The current value of gold (as of 09-02-2016) is $1323.80 / troy ounce. Considering he claims this is 99.999% that equals to $127.68 but of course no one is going to pay you 100% of the market value. At best you'll get 95% of the value. So yeah it's cool and all what he did but in the 7+ days it took to do this you could of made more money working full time a Taco Bell in less than 3 days.

  14. Hello, how is your foot now? There is nothing wrong with you first. I am following your channel but I can not complete the sedimentation process. Can you help me? I have destroyed a quantity of gold in the royal water, but I can not recover it. I am doing sedimentation with iron sulfate. I do not know if there is a secret to complete the sedimentation process. I care about my question and explain to me a detailed explanation and show me my mistake and thank you very much

  15. I found a layer of dust or gold atoms in the ground and I want to make sure that it went pure and I also want to separate the impurities from him. Thank you.

  16. I'd like to see the cost of all supplies + electricity (or other power source) used + any fuel used, then compare it to the value of the gold acquired at the end.

  17. I'll take any excess gold off your hands – you know, if you're having difficulty transporting it, or whatever. Refining isn't my style – pilfering, however, is.

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