Greetings everyone.
I did start another Aqua Regia digest on 500 g of a placer materialsmagnetically separated Black sands that still had some very fine gold trapped in the black sands concentrate . And I left the leach solution standing for two days on very low heat.
Using the same methods of HCL solution with the addition of HNO3 to create an Aqua Regis solution.
I used the standard boiling down protocol to remove the nitrates by adding a little bit of HCL and water to bulk up the solution. A lot of nitric fumes on the first boil of the solution.
As I was adding more hot water to the solution to bulk it up gold is present as my gloves turned purple in the process. And following the Stannous Chloride test gold present.
Let the solution stand over night.
A red precipitate formed in the solution.
I filtered and removed the red precipitate.
To be examined later.
What could this possibly be.?
Re Filtered the solution three times to make sure the solution was clean and clear of any solids.
Placed this in the Hot plate just to get it back to a warm state.
Started adding Sodium Metabisulfite and I mean plenty.
The solution went through various color stages,
The solution did start fizzing and I placed this in much larger beaker.
Ph is now 1.4 and bulk this solution with water to 2 litres in total just to give it room.
Nothing is dropping out of solution this time.?
I will add some pictures of the color of the solution.
I will let this sit till tomorrow give it time for anything to drop out of solution.
Any input would be greatly appreciated.
Thank you kindly. Avled.
#1 Picture Au on the glove. Some Au was lost.?
#2 AR Boiling down to remove Nitrates.
#3 Removing Nitrates
#4 Red brown precipitate formed overnight while solution was cooling down. Filtered the solution to remove Red brown precipitate.
#5 Placed solution in larger beaker and started adding SMB different color changes light brown.
#6 Solution slightly green.
#7 Solution light green and this is where i left it for the moment.
I did start another Aqua Regia digest on 500 g of a placer materialsmagnetically separated Black sands that still had some very fine gold trapped in the black sands concentrate . And I left the leach solution standing for two days on very low heat.
Using the same methods of HCL solution with the addition of HNO3 to create an Aqua Regis solution.
I used the standard boiling down protocol to remove the nitrates by adding a little bit of HCL and water to bulk up the solution. A lot of nitric fumes on the first boil of the solution.
As I was adding more hot water to the solution to bulk it up gold is present as my gloves turned purple in the process. And following the Stannous Chloride test gold present.
Let the solution stand over night.
A red precipitate formed in the solution.
I filtered and removed the red precipitate.
To be examined later.
What could this possibly be.?
Re Filtered the solution three times to make sure the solution was clean and clear of any solids.
Placed this in the Hot plate just to get it back to a warm state.
Started adding Sodium Metabisulfite and I mean plenty.
The solution went through various color stages,
The solution did start fizzing and I placed this in much larger beaker.
Ph is now 1.4 and bulk this solution with water to 2 litres in total just to give it room.
Nothing is dropping out of solution this time.?
I will add some pictures of the color of the solution.
I will let this sit till tomorrow give it time for anything to drop out of solution.
Any input would be greatly appreciated.
Thank you kindly. Avled.
#1 Picture Au on the glove. Some Au was lost.?
#2 AR Boiling down to remove Nitrates.
#3 Removing Nitrates
#4 Red brown precipitate formed overnight while solution was cooling down. Filtered the solution to remove Red brown precipitate.
#5 Placed solution in larger beaker and started adding SMB different color changes light brown.
#6 Solution slightly green.
#7 Solution light green and this is where i left it for the moment.
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