SilverNitrate
Well-known member
Here is my secret gold refining technique. I call it the PERFECT GOLD REFINE
Its really quite simple. First see my post here showing neutralizing of AR gold solution http://goldrefiningforum.com/phpBB3/viewtopic.php?t=2691
[img:700:525]http://www.gholar.com/tmp/gold-powder.jpg[/img]
This is for AR solutions containing approximately 50% Gold and 50% Copper. That is karat jewelry at a weight of at least 10 tr. oz
1) Dissolve the karat jewelry in AR
2) Filter away the silver chloride and other solids (get your hands on a glass frit filter)
3) Boil this filtered AR for 1-2 hrs
4) Filter this solution (removes more silver chloride)
5) Neutralize this solution with NaOH until before apparent color change.
6) Add in 2 tablespoons oxalic acid
7) Place this AR in a very large HDPE or LDPE plastic OR glass container
8) Pour in 50 ml of ethyl rubbing alcohol
9) Prepare a solution of sodium nitrite dissolved in water. About 2 lbs in 2 liters of water
10) Place this sodium nitrite in solution into a large drip funnel (separatory funnel)
11) Allow this to drip into the AR container at a rate of 2 drips per second
12) Let a period of 24 hours lapse
13) Decant off the top layer liquid and set aside
14) The gold should be rinsed off with water and ammonia in a vacuum filter funnel
15) Dry the gold and weigh. If the gold is less than whats estimated, you do have gold in the solution you sat aside. You can do the standard gold test also to make sure you don't have gold in your solution. If there is gold in the solution drip in more sodium nitrite solution and wait a day for the gold to separate. Oxalic acid forms copper oxalate which acts as a purposeful contaminate which allows the gold to fall out evenly. The ammonia rinse removes this copper oxalate. The ethyl alcohol acts as a de-foamer. Sodium nitrite's sodium attacks the chloride, and since gold chloride is the stronger acid and there is no gold nitrite, only the gold falls. When you refine gold this way you'll have some really great looking pure gold that is better than 999fine!
Its really quite simple. First see my post here showing neutralizing of AR gold solution http://goldrefiningforum.com/phpBB3/viewtopic.php?t=2691
[img:700:525]http://www.gholar.com/tmp/gold-powder.jpg[/img]
This is for AR solutions containing approximately 50% Gold and 50% Copper. That is karat jewelry at a weight of at least 10 tr. oz
1) Dissolve the karat jewelry in AR
2) Filter away the silver chloride and other solids (get your hands on a glass frit filter)
3) Boil this filtered AR for 1-2 hrs
4) Filter this solution (removes more silver chloride)
5) Neutralize this solution with NaOH until before apparent color change.
6) Add in 2 tablespoons oxalic acid
7) Place this AR in a very large HDPE or LDPE plastic OR glass container
8) Pour in 50 ml of ethyl rubbing alcohol
9) Prepare a solution of sodium nitrite dissolved in water. About 2 lbs in 2 liters of water
10) Place this sodium nitrite in solution into a large drip funnel (separatory funnel)
11) Allow this to drip into the AR container at a rate of 2 drips per second
12) Let a period of 24 hours lapse
13) Decant off the top layer liquid and set aside
14) The gold should be rinsed off with water and ammonia in a vacuum filter funnel
15) Dry the gold and weigh. If the gold is less than whats estimated, you do have gold in the solution you sat aside. You can do the standard gold test also to make sure you don't have gold in your solution. If there is gold in the solution drip in more sodium nitrite solution and wait a day for the gold to separate. Oxalic acid forms copper oxalate which acts as a purposeful contaminate which allows the gold to fall out evenly. The ammonia rinse removes this copper oxalate. The ethyl alcohol acts as a de-foamer. Sodium nitrite's sodium attacks the chloride, and since gold chloride is the stronger acid and there is no gold nitrite, only the gold falls. When you refine gold this way you'll have some really great looking pure gold that is better than 999fine!