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Aqua Regia vs. Acid Peroxide.

Gold Refining Processes. Chemical Processes & Chemical Discussion . Aqua Regia vs. Acid Peroxide. ... Once silver and the platinum metals mix, they will dissolve along with silver, using dilute nitric acid----so separating them can be involved. They are generally best recovered when parting silver in a silver cell.

MAKING NITRIC ACID QUESTION | Gold Refining & Metal …

Question, I AM NEW TO REFINING SCRAP SILVER AND GOLD. WITHOUT GOING INTO WHAT I NEED TO REFINE, I DO NEED TO MAKE NITRIC ACID DO TO MAKING THE VARIOUS PROCESSES AFFORDABLE. the question IN GENERAL FORM, IS NITROGEN THE SAME AS NITRATE, (Or will nitrogen added to sulfuric acid/water, make a Nitric acid.) i …

3 Easiest Ways to Refine Gold (Step-by-Step Guide)

1 - Inquarting low karat gold jewelry with silver (base metal). 2 - Silver digestion with nitric acid. 3 - Gold digestion with Aqua Regia. 4 - Gold precipitation with Sodium Metabisul fite. 5 - Washing and drying the gold. 6 - Melting of pure …

boiling off nitric acid | Gold Refining & Metal Extraction …

Hi GREAT forum, i have been doing lots of reading and am taking slower steps now .After dissolving a watch casing in nitric acid all that remains is the gold foil .should i filter this and then put the foils into solution or boil off the nitric acid first before putting gold into solution.My idea being that i could boil the nitric solution to save time later as boiling the gold …

How to Refine Gold (with Pictures)

Nitric acid

Hello I'm trying to use sodium nitrate + sulfuric acid to make 70% nitric acid. I understand the formula is a 2-1 mole = 1-2 mole nitric. But I can not get this to turn out right. If I add 1700 grams of sodium nitrate and 850 grams of sulfuric acid and 550 grams of water this should give me almost 2 liters of nitric acid but it's not.

Scrubber Design

Help Support Gold Refining Forum: This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others. T. Tahmoures Active member. Joined Dec 20, 2021 Messages 34 Location Middle east. Aug 1, 2022 #1 ... I'm using nitric acid for base metals, aqua regia for dissolving gold and sodium metabisulfite for precipitating ...

Gold not dropping

Help Support Gold Refining Forum: This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others. 1; 2; 3; Next. 1 of 3 ... Its very hard for me to get Nitric Acid so after a nitric acid wash, i try to use sodium nitrate and HCl to make poormans AR for the gold recovery bit. Last edited: Sep 10, 2024. Reply. E ...

Making poormans Nitric Acid

lazersteve: I'm using your nitric recipe to make poormans nitric. 100ml boiling distilled H2O, Add and stir to disolve, 170 grams Nitrate of Soda (Bonide brand), slowly add to prevent ing, 50ml conct H2SO4 (Rooto Drain Cleaner brand), Chill to precipitate salt. What I'm asking is what can I do with the salt cake that is left after the reaction?

Nitric Acid

Getting nitric acid seems to be a problem for most of you. The last time I bought it was about 2 years ago. I bought a 55 gal drum in Houston. It was used in a large industrial plant so, there were never any problems getting it. I think the name of the company we bought it from was Industrial...

Separating Silver from Gold Using Nitric Acid

This is a short tutorial demonstrating the separation of silver and gold using Nitric Acid. The initial weight of silver/gold mix weighed 41.5 grams. Here is the initial silver gold mix used: Please post your comments and suggestions as usual. I've provided this video as a …

65% Nitric acid | Gold Refining & Metal Extraction Forum

The normal recipie is 4ml:1ml; 31% HCl: 70% Nitric Acid per gram of gold to be dissolved. Your nitric is 15% : 70%/15% = 4.67 So you will need roughly 4.67 mL of 15% nitric acid to 4 ml of 31% HCl per gram of gold to be dissolved. I rounded up so you could easily get by with 4.5mL:4mL of your nitric to hardware store muriatic acid. Steve

How to Refine Gold With Nitric Acid

To refine gold with nitric acid, you will first need to blend the nitric acid with hydrochloric acid to produce aqua regia. Then, you will need to dissolve, filter and retrieve the gold from the substances bonded to it.

Pins With Nitric Acid | Gold Refining & Metal Extraction …

Spend a little time understanding how to use aqua regia, using a little excess HCl and limiting the nitric acid to only the amount needed (no more) by adding it in small amounts, using heat and giving time for the nitric to react and oxidize the gold and be consumed in the reaction, so that after gold is in solution you have little, or no free ...

Inquartation with sulfuric acid

Always dilute by carefully pouring acid into water. Using the concentrated acid to part gold and silver is not a good idea. It is just too dangerous. Nitric can be hard to get, and can be expensive, it is not a safe chemical but it can be worked with if done safely. With the sulfuric you may not get a second chance if crippled for life.

How to Refine Gold by the Acid Method | Shor International

See: Large Scale Gold Refining by Aqua Regia Acid Method. Having described its hazards, it must be pointed out that, like most industrial processes, refining gold in acid is quite safe when performed under controlled conditions. ... If you're using a nitric acid substitute: add 120 ml of hydrochloric (or muriatic) acid to the container, along ...

potassium nitrate

For making nitric acid, I prefer soda of nitrate (Hi-Yield soda of nitrate fertilizer). Four pounds for around $7 at most Ace hardware stores and many farm stores. The soda of nitrate seems to produce a bit more acid by volume, and the salts from potassium nitrate can can cause some real headaches as well as trap a good bit of acid in them.

Nitric acid not condensing.

Fuming nitric acid has no use in refining and recovery, it was used as an oxidizer for rocket fuel and would self-ignite if it gets into contact with anything combustible. ... Been doing some small recovery and refining of gold and silver for a few months now trying to learn. I have about 2g of gold powder and a 2g bead of silver and hoping to ...

Unable to Precipitate silver from Nitric Acid | Gold Refining …

Dear Refiners I've been scrapping various kinds of metal for some time now, and recently started looking into recovering silver from plated items. My approach has been to reverse electroplate Silver plated items using a salt solution in a stainless steel bowl as the negative cathode, and the silver electroplate items as the cathode, using a glass separator to keep the …

Gold Parting using Nitric Acid

The process of parting gold with nitric acid is old, and probably dates from the discovery of nitric acid itself; it is one of the simplest parting processes, and does not require a costly plant or much manipulative skill. ... Prev Previous Miller Gold Refining Process by Chlorination. Next Commercial Scale Gold Parting with Nitric Acid Next ...

Silver from brazing rods

Sure. But what Silver amount is too high? When parting gold with nitric acid it is 25% gold, hence the in"quart"ation. Any number for silver? Does the AgCl form an attached layer or can it be shaken off and it continues dissolution of the material underneath? AgCl in the vessel does not disturb me.

Does nitric acid damage gold

Help Support Gold Refining Forum: This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others. E. erol Member. Joined ... If I clean this sediment with nitric acid, will nitric acid damage the gold dust . Reply. Martijn Well-known member. Joined Aug 3, 2014 Messages 2,863 Location Netherlands, Zeeland.

Homemade Nitric acid | Gold Refining & Metal Extraction …

I have used this "recipe" with success on e-scrap items: HOMEMADE NITRIC ACID Just mix as follows. (makes about 1.5 quarts) (adjust recipe for the volume you need) Take 1 cup of sodium nitrate and grind it to a fine powder in a blender / food processor. (Don't use the food processor for food again. Go get a cheap one at Goodwill!)

silver refining with nitric acid | Gold Refining & Metal …

I submerge my silver concentrate ore in nitric acid and stirr it several times for a period of 24 hours. I then remove the acid and put it through a coffee filter until the acid is clean. I then use NaOH to neutralise the acid to a PH of 6 to …

Nitric and Palladium | Gold Refining & Metal Extraction …

hcl acid alone will not dissolve gold or copper. add the material in question to hcl acid in a chamber big enough to hold the volume of material and chemicals with 1/4 of available space left. add H2O2 (peroxide) to the mix of a ratio of 1 US cup to 1 US gallon to start the reaction. it will immediately turn yellow then quickly turn green. add a source of oxygen such …

Concentrated nitric acid substitute | Gold Refining & Metal …

Beginners Gold Refining Process Forum . Concentrated nitric acid substitute. Thread starter ... With nitric acid the gold can be recovered quickly and more efficiently at a cost that is still profitable. If you want to try these other methods, use a small sample batch for a test run. Don't sink your whole working capital into an unknown method.

Can I re-use HNO3+H202

Silver reaction to nitric acid: 3 Ag + 4 HNO 3 = 3 AgNO 3 + NO + 2 H 2 O The NO(g) generated by the reaction with Silver, is re-oxidized by the water (or H2O2) to form back Nitric acid and hydrogen. There are many side reactions going on, so i'm not sure i can cover or even understand how the entire dynamics works.

How to Refine Gold (with Pictures)

You may want to make some extra money by refining your own gold at home, or you may be a jeweler who wants to refine gold in-house. ... In some cases, you are correct. If gold is mixed evenly in the alloy and at a low enough concentration, you can use plain nitric acid to dissolve away impurities. However, if the gold is more pure (or is an ...

evaporating the Nitric acid

i dont think you can effectively evaporate nitric acid from the solution. urea is the preferred method of removing nitric, just add a few pellets at a time until theres no reaction or you can put a piece of gold into the solution and when there is no more reaction the nitric has been used up. sulfur dioxide will precipitate the gold out of solution, the preferred way to do this is …

Pins in Nitric Acid | Gold Refining & Metal Extraction Forum

The figure is probably at least .45 gallons of 70% nitric per pound of copper, when using 50/50 nitric. This is all theoretical. When the reaction produces fizzing, there is also some nitric loss into the air. All in all, in practice, it takes very close to 1/2 gallon of 70% nitric acid (1 gallon of 50/50 nitric) to dissolve 1 pound of copper ...