Going to start my batch tonight w/pics

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R

robert_93030

Active member
Joined
Dec 17, 2008
Messages
29
Location
california
Ok I have gotten all the pins off the proccesers total 50pcs weight is 3lb 4oz im going to drop them in nitric tonight to clean them as I was told on this forum then I will pour all the nitric out leaving the pins behind then I will rinse with DI water then drop the pins into a AR batch.

So far am I doing it right.

[IMG:800:600]http://i29.photobucket.com/albums/c286/lovef501/gold/gold004.jpg[/img]
[IMG:800:600]http://i29.photobucket.com/albums/c286/lovef501/gold/gold005.jpg[/img]
[IMG:704:528]http://i29.photobucket.com/albums/c286/lovef501/gold/gold006.jpg[/img]
 
Be sure you are setup with some sort of fume control and work in a well ventilated area.

Also your nitric will need to be 35% concentration.

Steve
 
Three reasons:

1) Helps ionize the HNO3 into H+ and NO3-

2) Most nitrates (the products of the reaction) are soluble in water.

3) the NOx off gases combine with extra water to form more HNO3 and less toxic vapor (brown NOx).

Steve
 
sorry for the delay i had the anitvirus2008 bug and it took forever to get rid of it. once i added the nitirc i got the famous gold clould of course my test canery died j/k im going to let it sit for a few hours. i could not get a pic of the clould but you know what it looks like.

pics

gold in beaker

[IMG:640:480]http://i29.photobucket.com/albums/c286/lovef501/gold/gold007.jpg[/img]

[IMG:640:480]http://i29.photobucket.com/albums/c286/lovef501/gold/gold008.jpg[/img]

[IMG:640:480]http://i29.photobucket.com/albums/c286/lovef501/gold/gold009.jpg[/img]

DI water
[IMG:640:480]http://i29.photobucket.com/albums/c286/lovef501/gold/gold010.jpg[/img]

i then added an equal amount of nitric.

So??? whats next?
 
After you dissolve all of the base meals using 35% nitric acid proceed to washing the foils and dissolving them in AR or HCl-Cl.


Steve
 
here are the after pics.

[IMG:640:480]http://i29.photobucket.com/albums/c286/lovef501/gold011.jpg[/img]

[IMG:640:480]http://i29.photobucket.com/albums/c286/lovef501/gold013.jpg[/img]
 
after i washed and filtered

[IMG:640:480]http://i29.photobucket.com/albums/c286/lovef501/gold014.jpg[/img]
[IMG:640:480]http://i29.photobucket.com/albums/c286/lovef501/gold015.jpg[/img]
[IMG:640:480]http://i29.photobucket.com/albums/c286/lovef501/gold016.jpg[/img]
[IMG:640:480]http://i29.photobucket.com/albums/c286/lovef501/gold017.jpg[/img]
[IMG:640:480]http://i29.photobucket.com/albums/c286/lovef501/gold018.jpg[/img]


does this look right or do i need to drop in nitric again?
 
ok im confused? i was told that the nitric bath would eliminate everything but the gold, and what was left and the bottom of the beaker was only gold? all other metal would be gone. in the filter it looks like alot but its not i also did a gold check on the green acid and it was neg for gold.
 
Some of the gold from plating will be in the form of a fine dust. A paint filter is an open mesh and will pass small particles that have been detached from the foils. The gold dust is not dissolved in nitric so a stannous test would not show this loss. The dust will settle in your nitric and can be recovered from the bottom.

From this link a paint strainer is 190 micron. A Whatman #2 filter paper is 8 micron.

http://www.gersonco.com/Products/Paint-Strainer---190-micron-synthetic-filter__010601.aspx


http://www.whatman.com/QualitativeFilterPapersStandardGrades.aspx
 
so the stuff in the filter is the gold? and the pins and stuff in the beaker is the junk? im going to trow the stuff in the filter in a AR batch can someone tell me the ratio? 1-3?
 

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