Nitric Acid Substitute.

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AceWithBass

New member
Joined
Jul 25, 2012
Messages
2
Hello GRF, I've ran into problems scrapping gold.

Nitric Acid is illegal in my country (Denmark) to buy/posses if its in a concentration of more than 50%.

Will 50% be enough for refining, or do i have to find a substitute?

Please help.
 
Standard 67-70% Nitric is usually used in 2 ways: (1) full strength when making up aqua regia with HCl and (2) diluted 50/50 with distilled water to dissolve silver (or, certain base metals).

(1) For aqua regia, the 50% could be used with little sacrifice in speed.

(2) For the equivalent of 50/50, 70% nitric, use the 50% acid and add 27%, by volume, extra water. For example, you could add 270ml of water to 1000ml of 50% nitric. To make up exactly 1 liter of 50/50, combine 787ml of 50% nitric with 213ml of distilled water.

By the way, gold4mike, when you dilute 70% nitric 50/50, you end up with 41% nitric. I know this doesn't seem to make sense but it is true. This was discussed on this thread:
http://www.goldrefiningforum.com/phpBB3/viewtopic.php?f=48&t=13858&p=139162&hilit=splash+nitric#p139162
 
Hi AceWithBass.
I am also a Dane.
Just want to welcome you here.
Have you found a place to buy nitric acid?
Have been looking for it for 6 months now.
Peter
 
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