Williamjf77
Well-known member
- Joined
- Oct 30, 2018
- Messages
- 138
Hello everyone, I have a little issue processing regular pentium gold cap ceramic cpu’s In AR.
I smashed then lightly torched then put in a beaker with hcl then heated, once I got up to temp I added nitric in 2-3 ml doses and everything was going fine then after a while the solution precipitated a green powder and stopped reacting with nitric additions. I then added more hcl and still no more reaction.So I took it off the heat and let it cool. The solution was pretty dark but I poured off some and noticed the gold pins still there, albeit pretty flimsy.
I tested with stannous and got a streak of black but not a normal looking result so I questioned the stannous. Made new batch and let everything sit over night.
Today I filtered the whole solution and retested with stannous and got a negative. In the filter is a green / yellow precipitation.
Should I proceed with a fresh AR on the remaining solids or is there gold in the green pea soup looking powder?
I can add some pictures tomorrow, thanks
I smashed then lightly torched then put in a beaker with hcl then heated, once I got up to temp I added nitric in 2-3 ml doses and everything was going fine then after a while the solution precipitated a green powder and stopped reacting with nitric additions. I then added more hcl and still no more reaction.So I took it off the heat and let it cool. The solution was pretty dark but I poured off some and noticed the gold pins still there, albeit pretty flimsy.
I tested with stannous and got a streak of black but not a normal looking result so I questioned the stannous. Made new batch and let everything sit over night.
Today I filtered the whole solution and retested with stannous and got a negative. In the filter is a green / yellow precipitation.
Should I proceed with a fresh AR on the remaining solids or is there gold in the green pea soup looking powder?
I can add some pictures tomorrow, thanks