Gold filled batch, strange white stuff after drop?

[Hartbar]

Did a GF batch, nitric, rinse, nitric again, rinse, incinerate foils, HCL boil, followed by 3 distilled water boils. AR to dissolve gold.
Filtered to clear. Dropped with SMB, looked ok, then got this unusual white stuff in beaker?
Any thoughts? Think maybe tin or lead?
Going to do usual powder DW water and HCL rinse I think?
Thank you

 

[Hartbar]

I see some good gold powder in there, stannous test shows no AU in solution.

 

[Palladium]

Let it settle a few hours. Decant.... NOT FILTER! Wash it with water twice and go back to ar. Drop it again, water and hcl washes.
Gold filled is a dirty process and requires at least 2 runs.
All that stuff will be caught in you filter next time.

 

[Yggdrasil]

What is powder DW water?

 

[Palladium]

Could be tin.... GF is dirty like that. Could be copper chloride from dilution. Could be to much smb. Could be some type of filler. I've run into GF with plaster before. Sort of like the sand like filler in silver knife handles. The 2nd run will clear it up and what's not water or acid soluble will be trapped in the filter.

 

[Hartbar]

What is powder DW water?

Sorry, when I said powder DW, I meant after drop with SMB i normally let sit, decant, boil 3 times with distilled water, a HCL boil, then 3 more with distilled water. Works quite well most times, thank you all for input

 

[BlackLabel]

I didn’t get it yet…

DW = Drop With?
DW = Distilled Water?

 

[Hartbar]

DW = Distilled water in this process.

 

[Hartbar]

I boiled in distilled water twice, then a HCL boil. The distilled didn’t do much. The HCL cleared up the white stuff well, but I got a lower yield than I was expecting. The HCL turned to a Kelly green, wonder if there’s any gold still not recovered?

 

[Yggdrasil]

I boiled in distilled water twice, then a HCL boil. The distilled didn’t do much. The HCL cleared up the white stuff well, but I got a lower yield than I was expecting. The HCL turned to a Kelly green, wonder if there’s any gold still not recovered?

Stannous then stock pot if barren.

 

[Alondro]

Let it settle a few hours. Decant.... NOT FILTER! Wash it with water twice and go back to ar. Drop it again, water and hcl washes.
Gold filled is a dirty process and requires at least 2 runs.
All that stuff will be caught in you filter next time.

I boiled in distilled water twice, then a HCL boil. The distilled didn’t do much. The HCL cleared up the white stuff well, but I got a lower yield than I was expecting. The HCL turned to a Kelly green, wonder if there’s any gold still not recovered?

GF stuff can have lots of metals. The foils recovered after dissolving the base metal beneath are not pure gold, after all. They have silver and copper in them. Dissolving with AR finally releases those metals. Could be silver chloride, or could be Cu(I)Cl that stayed in solution until it became too aqueous. Nickel chloride is very soluble in water.

GF foils, if you have a lot, are best processed with the Sreetips method of alloying with silver to a high silver content, and then dissolving the silver (and copper) with nitric, leaving a mostly gold sponge behind, which is then much easier to process.

He has a number of videos showing how that's done, and how to calculate the exact mass of silver to alloy.

 

[Palladium]

I've done 1,000's on top of 1,000's of lbs of GF and not once have i ever had to inquart.
No need to inquart foils. The videos he made were for educational purposes to explain chemistry, but not all chemistry procedures are practical in a production sense.

 

[Shark]

Most videos are for the views which pays money. Very few are actually trying to teach anything other than the very minimum basics.

 

[cejohnsonsr1]

Inquartation is for karat scrap. Foils are a different process because there aren’t any alloying metals to remove.

 

[BlackLabel]

Inquartation is for karat scrap. Foils are a different process because there aren’t any alloying metals to remove.

Foils from fingers are not 24k.
The gold would be too soft for mechanical stress.

 

[Eaa]

are gold precipitated with smb conduct electricity or not,before melting?

 

[Hartbar]

Thank you for that info. I’ve seen a lot of sreetips videos, I haven’t seen where he takes his GF foils and inquarts them, I’ll take a look. I see where he goes back to AR after dropping powder and washing, which is very commmon. I’ve been able to get .99 gold with only one AR refine a few times, not this time! Incinerating is the key I believe, you never really know what’s in your GF, probably every metal known to man it seems

 

[Alondro]

Inquartation is for karat scrap. Foils are a different process because there aren’t any alloying metals to remove.

When the original poster used GF, it was for Gold-Filled. Those yield thick foils when the base metals are dissolved, and those foils are rarely anywhere close to pure gold. Usually 10k-14k.

 

[FrugalRefiner]

When the original poster used GF, it was for Gold-Filled. Those yield thick foils when the base metals are dissolved, and those foils are rarely anywhere close to pure gold. Usually 10k-14k.

That's true enough. The foils are karat gold, but they are still very thin. Even if there is a lot of silver in the alloy, the foils are thin enough that a coating of silver chloride isn't likely to become thick enough to prevent the acid from getting to the gold. I've never inquarted foils from gold filled and never had a problem dissolving them.

Dave

 

[Hartbar]

I don’t think sreetips has a video out where he inquarts his gold filled foils post nitric either, looked didn’t see one.