Gold Refining - Precipitating Gold out of Aqua Regia [remake HD] Shown here is the reaction between Sodium Bisulfite (Na2HSO3) solution and Chloroauric Acid (HAuCl4) solution. Of course, this reaction is an essential part of almost any Gold recovery and refining process involving acid solutions like Aqua Regia (aka - Royal Water).

I shot this video in honor of my new HD camera... Besides, Gold reduction from solution is one of the all time coolest reaction to film. I think you would agree...

Anyway.... Let's move on.
Sodium Bisulfite is produced simply by dissolving anhydrous Sodium Metabisulfite aka SMB (Na2S2O5 -) in water.
Sodium Bisulfite react with a solution of Gold Acid and Water according to the following redox equation:
3 NaHSO3 + 2 HAuCl4 + 3 H2O = 3 NaHSO4 + 8 HCl + 2 Au

Once Gold is reduced to metal (powder) it slowly precipitate out of solution. The contant sirring helps the powder agglomerate and settle a bit faster. The fast forwarded scene represent about 5 minutes of real time.

In this particular video you are withnessing a second refining step, the Gold was recovered exclusively from scrap ceramic CPU's using the methode described in this tutorial: - Part 1 - Part 2

Hope you find this video cool & useful. Please Comment, Like and Subscribe. :)

Rating Rating Rating Rating Rating 
Views: 80,014
Added: 1 year
Runtime: 2:14
Comments: 79

Tags for this video:  

Find more videos in the: "Tech"
Uploaded by: indeedItdoes
See more videos uploaded by indeedItdoes

Related Videos:

High Karat Gold - Refining Process & Melting. Pt. 1
Rating Rating Rating Rating Rating 
Views: 175628
Gold Fingers - How to Recover Gold from Electronic Scrap
Rating Rating Rating Rating Rating 
Views: 404511
http:// In this video tutorial i'm showing how to recover gold from electronic circuit board scrap. Specifically the gold...
How to Refine Scrap Gold Jewellery - Inquartation Methode P. 1
Rating Rating Rating Rating Rating 
Views: 26359 Part 1 of the full video Tutorial on How to Refine Scrap Karat Gold Jewellery using the Inquartation Methode. This video...
Gold Reduction with Oxalic Acid -Complete Process
Rating Rating Rating Rating Rating 
Views: 268480
How to Easily Refine & Smelt Gold from Computer Memory Chips
Rating Rating Rating Rating Rating 
Views: 107043
Part 2 video on how to take the gold from computer chips and refine it to a more pure metal and smelt it.
Gold Refining Precipitating Gold with Stump Out
Rating Rating Rating Rating Rating 
Views: 79687
Starts with filtering dissolved gold. Set up of reaction vessel for precipitating the gold powder. Testing the solution with stannous chloride to...
cpu gold
Rating Rating Rating Rating Rating
Views: 66918 How to extract gold from computer. Electronic recovery cpu. You can easily extract gold from the...
GOLD | How to and where to find Gold
Rating Rating Rating Rating Rating 
Views: 1050825
Turon River, NSW, Australia. When prospecting for gold, look for rock bars and bedrocks where gold bearing wash might be deposited. LINK:...
Gold Refining with aqua Regia
Rating Rating Rating Rating Rating 
Views: 51950
Gold Refining with aqua Regia method.
Motherboard 24Kt Gold? How Much Gold?
Rating Rating Rating Rating Rating
Views: 1057247
Okay lets dive a little deeper and take a close look at this Motherboard! There are motherboards with Gold in them, but some with Copper - After...
How to separate the gold from the circuit board scrap electronic waste
Rating Rating Rating Rating Rating 
Views: 81771
How to recover gold from scrap gold recovery from the circuit board scrap electronic e-waste.
Gold recovery from computer's cpus or processors
Rating Rating Rating Rating Rating 
Views: 17707
You have watched an edited version of our video "Gold recovery from computer cpus or processors". Gold recovery from computer cpus (processors)...
THE ACID TEST - How To Refine Gold (FINAL)
Rating Rating Rating Rating Rating
Views: 44965
DO YOU PASS THE ACID TEST? How To Strip The Gold Plating From Computer Parts or Anything Else Gold Plated Video Features an Original Oil Painting...
ic chip gold recycle gold wire bonding
Rating Rating Rating RatingRating
Views: 28829 ic chip gold recycle gold wire bonding Wire bonding is the method of making interconnections between an...
Gold Refining Gold Filled Scrap
Rating Rating Rating Rating Rating 
Views: 21672
Demonstrates precipitation of the recovered gold from a solution of chloroauric acid
Getting gold from CPUs and computers
Rating Rating Rating Rating Rating
Views: 185272 Old computers are free gold mines! Getting gold from computers and CPUs Electronic Gold Scrap Recovery E-Waste...
Gold extraction process วิธีสกัดทองทำทอง
Rating Rating Rating Rating Rating 
Views: 236677
Gold Extraction and gold recovery E-book. Gold extraction process. Teaching extract gold. gold recovery...
Gold Refining Precipitating Gold With Oxalic Acid
Rating Rating Rating Rating Rating 
Views: 14739
Demonstrates the basics of using oxalic acid to precipitate pure gold from auric chloride solution
Free Energy Light Bulb
Rating Rating Rating Rating Rating 
Views: 2927986
Channel Page: Twitter: Google + : Do you really...
How to Recover Silver from Computer Keyboards - SlideShow
Rating Rating Rating Rating Rating 
Views: 241678 Silver recovery from computer keyboards mylars. Learn more about scrap Silver recovery and refining at my new website:...
The Process of Excavating and Refining Gold
Rating Rating Rating Rating Rating 
Views: 337603
How gold is produced, from excavation to ingot-form.
Reverse Electroplating of goldplated pins
Rating Rating Rating Rating Rating 
Views: 135428
The new book is out! Read all about gold and silver from scrap. Where to find it, what to expect. Now on Amazon.
Gold Recovery CPU and Circuit.
Rating Rating Rating Rating Rating
Views: 219887
ิีBy Sample Made easy. Nitric acid. The extraction of gold from computer circuit board CPU. gold recovery...
How to Turn Anodized Aluminum to Clean Aluminum - Scrapping Trick
Rating Rating Rating Rating Rating 
Views: 76707 Here's a neat little trick on how to turn your scrap Anodized Aluminum to clean scrap Alunimun scrap and maybe make a...
How to recover gold from computer cpus/ processors
Rating Rating Rating Rating Rating
Views: 96601
You have watched an edited version of our video "Gold recovery from computer cpus or processors". Gold recovery from computer cpus (processors)...


Author NickBlackDIN (1 day)
... really? six POUNDS to make 15 GRAMS?
this is how a lot of science mistakes happen. stick to one unit of
measurement please (metric or imperial)
but for the people to lazy to convert it themselves, here's the conversion:
6lbs = 2721.55g
0.03lbs (0.53oz) = 15g
that's an average gold content of %0.005

Author Mathieu Belanger-Camden (5 months)
Recovergold from Aqua Regia soltio

Author Raicu Stefan (6 days)
Can not find muriatic acid
WHAT COULD replaces

Author Jericho Xanderia (3 months)
"Royal Water" :S nasty stuff

Author ilie ursut (27 days)
Indeed i have the same problem like Mattwert22 , is there and solution for
ths problem ?

Author varshit ratna (26 days)
fuck offfffffffffffffffff

Author 2010invent (1 month)
I do exactly the same thing and it only gets cloudy dark orange color. I
have two ounces of gold in about 600ml aqua regia. Added all together about
180 gr of smb, and nothing.

Author usrafrnk (1 month)
only problem I had with this was finding enough sodium
bisulfite - 

Author Duck TheQucker (2 months)
how many gramms of SMB dissolved in how many ml of H2O.

Author Ahmed Kamal Mustafa (2 months)
how to recover the gold from polishing buff... should i use the same
method..? or there any other method as well..?

Author Kevin Gu (1 month)
what is oxidised in the equation 3 NaHSO3 + 2 HAuCl4 + 3 H2O = 3 NaHSO4 + 8
HCl + 2 Au???????????

Author ilie ursut (27 days)
Hello , i see you know what you are doing , please help , i broke my hands
taking computer apart etc and i screw up the solution , nbow i have a bunch
of gold in there and i cant drop it , is that possible like the liqiud to
be to dirty uith cooper zinc etc or there are to much acids , please guide
me if you can , thank you Ilie

Author Duck TheQucker (2 months)

Author Mattwert22 (1 year)
I tried precipitating the gold out with sodium bisulfite and each time i
added the sodium bisulfite solution, black precipitate (gold) would form
and redissolve. Also a brown gas was formed and eventually the black
precipitate stopped forming and the solution stayed green no matter how
much more sodium bisulfite was added.

Author toxicatmospheric143 (1 year)
Oh and what should be refined first if solution has many
Plat? Silver?

Author indeedItdoes (1 year)
Ferrous sulfate

Author Mark Dack (1 year)
PyroAbsestion22 yer my AR solution went really dark brown hasnt gone back
to the green solution but wich is good i spose .i put ram sticks an the
gold fingers on the bottom of videocards, an some gold platted copper pins
from the motherboard an harddrives. I hope that adding Urea to it to
nutralize the nitric acid ,works then i spose you add more SMB to restart
the precipitation again ,i hope i got all that right..????

Author DAMMSE420 (8 months)
Hey with what kind of drobs u are seperate the gold from the acid ?

Author devessa tareck ibrah (10 months)
pls i am just to learn how to refine gold if any one can help me as i am
from gold zone in cameroun i just start to prospecting god thks to all of
you here this my e-mail i am devessa

Author toxicatmospheric143 (1 year)
I did one batch using 3:1 HCl:HNO3... urea to dissipate the nitric acid and
smb to precipitate gold. My solution turned a deep greenish blue.. After
all that and filtering, I added some more smb to the solution and it turned
a light yellowish green and crystals have formed, along with some white
soluble residue. Are the crystals copper? This is my first small batch. I
read of this procedure before seeing yours and wanted to know if you had
any input. Also next batch, doing it your way.

Author DAMMSE420 (8 months)
hey do you know what he has given into the aqua regia ?

Author SuperKenny720 (1 year)
I know nothing about chemicals but would like to turn computer scrap and
cell phones into gold. Can some just tell me where to get exactly what I

Author Diego Alhach (6 months)
What the change colors!

Author norxcontacts (1 year)
How pure was the final product?

Author indeedItdoes (1 year)
I wish all of them were... I would have been a rich man by now.

Author xCarlito67x (1 year)
hello my friend, i have one or many questions...;-) what can i use when i
dondt have Sodium Bisulfite ???

Author Mattwert22 (1 year)
What would happen if you added too much sodium bisulfite?

Author ashwini panchbhai (5 months)
Amazing video's. Which assorted CPU's have you used to recover 15 gms gold
from 6lbs? Was it all just a mixture or a particular type of ceramic cpu's?

Author powmful (1 year)

Author ronnie kemper (1 year)
so from about 100-150 dollars worth of materials you got 438.75
dollars....thats amazing

Author Vidar Wolfheim (1 year)
im on the cientific side of youtube again ... AND I LIKE IT!

Author indeedItdoes (1 year)
The plating is indeed very close to 24K gold. No worries, your gold is
still there, just keep eatching away the base metals. Eventually you will
see them foils floating around.

Author Fiveone Cleveland (1 year)
thanks for the quick reply im finding your channel quite interesting keep
up the good work

Author indeedItdoes (1 year)
Nothing really... depends how much is too much :)

Author indeedItdoes (1 year)
i don't like masks, so everything is done under the fumehood (or out side).
Having a fume hood also helps to prevent corrosion to any exposed metal in
your shop.

Author Zanragnar (1 year)
Wow, I had no idea the yield from CPUs was that good! If my calculations
are correct, by that estimation, and current market value (~1730USD/oz)
that should be just around $150 a pound yield for those CPUs. Makes me
wonder how expensive operating costs are. Still waiting for a Catalytic
Converter video -Ragnar

Author will Lloyd (1 year)
Lets not lest

Author chemist97ful (1 year)
(in the 1st part)How many CPUs did you use? (in the 2nd part)Were did you
find SMB?PS very beautiful videos! ;)

Author indeedItdoes (1 year)
The stirring helps agglomerate the powder faster. Other than that and the
fact that it looks very cool, it is not an absolute must. You can add SMB
dry or dissolved in water... either way is ok.

Author Fiveone Cleveland (1 year)
im guessing the fumes would be pretty toxic yeah. do you wear a mask?

Author Grundalizer (1 year)
Again, amazing video. Where do you get your glassware? I know lot sof
places sell "cheap" borosilicate glass, but if there is one time I want to
make sure I'm using quality glass, it's when it's filled with AR

Author TripleX2go (1 year)
Hi, how do you dilute the left over solution so that it's safely pour into
the drain?

Author toxicatmospheric143 (1 year)
Is there a simple step by step process with amounts of materials used
written on your site? I have watched these videos and read your site
hundreds of times. I just want to make sure everything I am doing is right.
Also, you should make a video with other metals mixed in your solution so
us newbies can properly determine what is inside and how exactly to obtain
all elements. Great vids :)

Author koenman5534 (1 year)
Wish i could do this. It looks like an cool job or hobby to do. Plz keep
making video's :D

Author indeedItdoes (1 year)
It will stick to the base metals until most of the pin structure is
dissolved. You can add heat and also use a more concentrated HCl to make
things go fsater. Have you seen my other video about fiber cpu's ?

Author Hacker2013able (1 year)
Thanks for making this Video. Whats that spinny thing in Soluation that
stirs it? Does it work off heat? Where do I get one? Thank You for your
time and Kind Consideration on this Matter.

Author silentiumestaureum93 (1 year)
What is that at 1:03?

Author Power Ball Pythons (1 year)
This makes Chemistry class actually relevant.

Author Grundalizer (1 year)
melting the gold powder to make a button

Author olip96 (10 months)
He gets that gold from old ceramic Pentiums and stuff like that, not from
Core i7 processors...

Embed Video:


Search Video

Top Videos

Top 100 >>>


Check PR