mythen10
Well-known member
- Joined
- Jun 25, 2022
- Messages
- 259
Hi , yesterday after I see a couple of movies on YouTube about Poor's man nitric acid i decide to try this method.
I start like in a movie with gold plated fingers , I was added about 520 gr(this contain minimum 2.5 gr of pure gold). I put the fingers with sulfuric acid ,water and potassium nitrate on stove and is start the reaction like in the YouTube clip, after 10 minutes the foils from fingers start coming down floating all around in solution (I was so happy), after another 20 minute the solution become saturated and I filter the foils and replace the solution with a fresh one, checking the saturated solution with SNCL show me a positive test for gold this mean the poor's man nitric acid dissolve some foils. After 10 minutes the replaced solution of poor man nitric acid it dissolve all foils from fingers (I was so sad).
CONCLUSION: POOR MAN NITRIC ACID DISSOLVE THE GOLD.
The PROBLEM: I combined that two solution and I was added urea followed by addition of SMB dissolved in water and the solution was directly changed the colour to black and the gold it was start to precipitate, I collect the gold and I test the solution with SNCL for gold and the test was possitve, I try to add more SMB a excess of SMB AND PMB I was added and after several hours on the bottom of beacker it was a slug of gold with SMB ant PMB wich I successfully refine with HCl and hydrogen peroxide.
I recover in total about 1.6 gr of gold(I must recover minimum 2.5 gr of gold from 520 gr of fingers) and the problem was the waste solution still contain gold who don't want to precipitate and I put that solution in to a bucket to try to precipitate with copper.
IN CONCLUSION POOR MAN NITRIC ACID WILL DISSOLVE THE GOLD AND MAKE VERY HARDER TO ISOLETE THE GOLD FROM SOLUTION.
(after this I try with gold plated fingers an same result the gold go in solution)
I start like in a movie with gold plated fingers , I was added about 520 gr(this contain minimum 2.5 gr of pure gold). I put the fingers with sulfuric acid ,water and potassium nitrate on stove and is start the reaction like in the YouTube clip, after 10 minutes the foils from fingers start coming down floating all around in solution (I was so happy), after another 20 minute the solution become saturated and I filter the foils and replace the solution with a fresh one, checking the saturated solution with SNCL show me a positive test for gold this mean the poor's man nitric acid dissolve some foils. After 10 minutes the replaced solution of poor man nitric acid it dissolve all foils from fingers (I was so sad).
CONCLUSION: POOR MAN NITRIC ACID DISSOLVE THE GOLD.
The PROBLEM: I combined that two solution and I was added urea followed by addition of SMB dissolved in water and the solution was directly changed the colour to black and the gold it was start to precipitate, I collect the gold and I test the solution with SNCL for gold and the test was possitve, I try to add more SMB a excess of SMB AND PMB I was added and after several hours on the bottom of beacker it was a slug of gold with SMB ant PMB wich I successfully refine with HCl and hydrogen peroxide.
I recover in total about 1.6 gr of gold(I must recover minimum 2.5 gr of gold from 520 gr of fingers) and the problem was the waste solution still contain gold who don't want to precipitate and I put that solution in to a bucket to try to precipitate with copper.
IN CONCLUSION POOR MAN NITRIC ACID WILL DISSOLVE THE GOLD AND MAKE VERY HARDER TO ISOLETE THE GOLD FROM SOLUTION.
(after this I try with gold plated fingers an same result the gold go in solution)