DynamicState
New member
- Joined
- Aug 16, 2012
- Messages
- 4
Hello everyone, first day here. I just found this forum after attempting to extract and refine Au from circuit boards. I've already soaked the boards in a Hydrocloric Acid and Nitric acid substitute solution(SUB-ZER0, sold by ShorInternational.com). I started with maybe 3lbs. of gold bearing boards broken down with minimal board excess. With the hydrocloric acid and sub zero(AR) mixed in a container i just poured all the broken board pieces into the Aqua Regia solution. I was thinking everything would be liquified. It took close to 2 hours of soaking before there was any reactions or bubbling. After 3 hours of soaking I seen there was still gold on the boards so I decided to let soak over night, may not have been a good idea, I dont know??
After 11 hours of soaking ALL gold appears to have been removed. I saved the boards just in case. I then removed as much solid waste as possible by filtering through mesh like a pool skimmer. There were still very small particles in the Aqua Regia so I tried a coffee filter on a small amount. I then notciced small flakes of gold that didn't pass through the coffee filter. Does this mean the Aqua Regia solution wasn't strong enough. After removing most waste I added a pinch of urea and nothing. So i gave it a min stirred it around and added a pinch more, nothing. Does this mean the Aqua Regia weakend greatly overnight???
Once urea was added I then proceeded with preciptating the gold, at room temperature. I added storm precipitant slowly while stirring. It changed to a dark maroon color and started looking muddy. Also there appears to be an Algae like substance floating just below the surface of Aqua Regia solution. I do believe theres gold in the solution but it seems contaminated with that cloudy substance.
Right now I have a bucket containing Hydrocloric acid, Nitric substitute(subzero), dash of urea, storm precipitant, and all the gold and fine debris. Oh and theres maybe a cup of distilled water in the mix . I'm reaching out in hope of finding someone who has the time to explain maybe what I'm doing wrong. Do I need to go over more steps or repeat any others? This is my first extract and refine rodeo so please keep the negative comments to yourself. This was also a spur of the moment thing so I jumped in this blind. I will be doing my own homework to find solutions and ways of efficiency but any info given pertaining to this subject is GREATLY APPRECIATED!!!!
Thanks everyone for taking the time to read my problem. I hope I can be there to help anyone else who has problems I've already or soon shall experience.
After 11 hours of soaking ALL gold appears to have been removed. I saved the boards just in case. I then removed as much solid waste as possible by filtering through mesh like a pool skimmer. There were still very small particles in the Aqua Regia so I tried a coffee filter on a small amount. I then notciced small flakes of gold that didn't pass through the coffee filter. Does this mean the Aqua Regia solution wasn't strong enough. After removing most waste I added a pinch of urea and nothing. So i gave it a min stirred it around and added a pinch more, nothing. Does this mean the Aqua Regia weakend greatly overnight???
Once urea was added I then proceeded with preciptating the gold, at room temperature. I added storm precipitant slowly while stirring. It changed to a dark maroon color and started looking muddy. Also there appears to be an Algae like substance floating just below the surface of Aqua Regia solution. I do believe theres gold in the solution but it seems contaminated with that cloudy substance.
Right now I have a bucket containing Hydrocloric acid, Nitric substitute(subzero), dash of urea, storm precipitant, and all the gold and fine debris. Oh and theres maybe a cup of distilled water in the mix . I'm reaching out in hope of finding someone who has the time to explain maybe what I'm doing wrong. Do I need to go over more steps or repeat any others? This is my first extract and refine rodeo so please keep the negative comments to yourself. This was also a spur of the moment thing so I jumped in this blind. I will be doing my own homework to find solutions and ways of efficiency but any info given pertaining to this subject is GREATLY APPRECIATED!!!!
Thanks everyone for taking the time to read my problem. I hope I can be there to help anyone else who has problems I've already or soon shall experience.