After successfully refining a small test batch of gold scraps, I decided to do a larger batch.
I did the inquartation (I think correctly) with silver and then dissolved it using dilute nitric. Everything went well and I got a nice "spongy" batch of gold in the bottom of the beaker. Then, here is where things went wrong.
I either didn't rinse my gold well enough, or I didn't let the nitric acid fully dissolve all the silver and base metals. After I dissolved the gold in the aqua regia, I was left with a very muddy opaque solution and it was very difficult to filter even using vacuum.
I am stuck now and not sure where to go from here. Do I go ahead and try to precipitate the gold out of solution or do I need to back up somewhere?
Here are a couple of pictures to show the color of the gold solution and mud that is trapped. If my calculations are correct, I should end up with around 3oz of pure when it is all said and done.
Any help is greatly appreciated.
Ken
I did the inquartation (I think correctly) with silver and then dissolved it using dilute nitric. Everything went well and I got a nice "spongy" batch of gold in the bottom of the beaker. Then, here is where things went wrong.
I either didn't rinse my gold well enough, or I didn't let the nitric acid fully dissolve all the silver and base metals. After I dissolved the gold in the aqua regia, I was left with a very muddy opaque solution and it was very difficult to filter even using vacuum.
I am stuck now and not sure where to go from here. Do I go ahead and try to precipitate the gold out of solution or do I need to back up somewhere?
Here are a couple of pictures to show the color of the gold solution and mud that is trapped. If my calculations are correct, I should end up with around 3oz of pure when it is all said and done.
Any help is greatly appreciated.
Ken