dtectr
Well-known member
Here's the button 
more views here http://goldrefiningforum.com/phpBB3/viewtopic.php?f=61&t=9026
I started with these
and stripped them in sulfuric cell, about a kilo
before the solution heated, so I stopped, then processed the powder the next day after it had settled well.
I siphoned off the clean acid, placed residue in 5-6 times amount of cold water, let settle then siphoned, added distilled water, stirred & let settle twice. I noticed, though, that the concentrated sulfuric settled with the powder, so rinse wasn't very complete.
I remembered reading in The Foundry, Penton Pub. Co., 1905, that to completely rinse sulfuric from residue, a 1:1 ratio of alcohol : water could be used. So I added 70% Isopropanol with enough distilled water to equal about 1/2 liter of 1:1, stirred thoroughly & left to settle.
The solution became cloudy as sulfuric was pulled into solution, then when settled, I poured it into filter, rinsed it down into bottom of filter, then incinerated filter & all in steel skillet.
Following incineration, there were 2 distinct colors of residue - black powder & golden brown looking flakes. I processed all with HCl-Cl, but after long time, the golden brown flakes refused to dissolve. I filtered these from Au-Cl4 rinsed & processed these seperate from precipitate.
They took forever to consolidate, then finally became perfectly round, smooth shiny sphere, which when cooled looked like above. here's the dish after melt. I'll have to add that in another post. too many attmts.
more views here http://goldrefiningforum.com/phpBB3/viewtopic.php?f=61&t=9026
I started with these
and stripped them in sulfuric cell, about a kilobefore the solution heated, so I stopped, then processed the powder the next day after it had settled well.
I siphoned off the clean acid, placed residue in 5-6 times amount of cold water, let settle then siphoned, added distilled water, stirred & let settle twice. I noticed, though, that the concentrated sulfuric settled with the powder, so rinse wasn't very complete.
I remembered reading in The Foundry, Penton Pub. Co., 1905, that to completely rinse sulfuric from residue, a 1:1 ratio of alcohol : water could be used. So I added 70% Isopropanol with enough distilled water to equal about 1/2 liter of 1:1, stirred thoroughly & left to settle.
The solution became cloudy as sulfuric was pulled into solution, then when settled, I poured it into filter, rinsed it down into bottom of filter, then incinerated filter & all in steel skillet.
Following incineration, there were 2 distinct colors of residue - black powder & golden brown looking flakes. I processed all with HCl-Cl, but after long time, the golden brown flakes refused to dissolve. I filtered these from Au-Cl4 rinsed & processed these seperate from precipitate.
They took forever to consolidate, then finally became perfectly round, smooth shiny sphere, which when cooled looked like above. here's the dish after melt. I'll have to add that in another post. too many attmts.
