auric color??

[lunar4772]

I have just completed the HC/CL process and have about 29 ounces of auric chloride. The color seems to be dark compared to the ones I find on the site. However in one of Steves posts he says that concentrated auric could be orange or even reddish. So I was just wondering if someone with more experience could comment on the color of my solution. I started with about 4-5 grams of gold foils from pins done in AP.
Thanks
Frank

 

[lazersteve]

Frank,

Depending on the color of the dark solution it may be some copper contamination. Four or five grams is not enough gold to cause 29 ounces (~900 mL) of solution to darken much beyond yellow.

Steve

 

[lunar4772]

I can't seem to get the pics to upload but thats what I thought. Although I did wash 4 times with hcl and rinsed well with water. The acid was nice and clear before I rinsed. I wish I could send pics ( probably something I am doing) because I have a color simalar to beer.
If you don't mind Steve how should I proceed?

 

[lazersteve]

Frank,

Filter the solution until it is 100% free of debris and then add SMB with lots of stirring as per usual.

Steve

 

[lunar4772]

Steve as per your reply I dropped with smb and had a brown powder form as expected. I then washed the powder with hot hcl and then water 3 times then I did a wash with ammonia and again 3 times with distilled water. Everything occurred just as Harold stated in his post on washing powder. The color lightened and the powder began to clump very nicely. I then disolved again in hcl cl to further purify as suggested. But some of the powder does not seem to want to disolve this time. I heated the solution and this seemed to help. I still have some bits to work on but I have also noticed a fine white crystaline substance in the solution which goes away while heated. I never had any of the crystals in my first smb drop at all. What would these be and do you think that I may have satuated my auric and should add some more hcl cl. My first drop I had 29 ozs of auric and this one I have it down to 6 or 7 ozs. It is a rich golden yellow color and tests dark purple almost black with stannous. Sorry for the drawn out explanation but I want to try and give you guys as much info as I can. All advise would be greatly appreciated.
Thanks
Frank

 

[lazersteve]

Frank,


Everything sounds normal. The white crystals are salt. Add a little extra water until it all dissolves.

You can now melt the powder in a mini-firebrick furnace using MAPP gas or with oxy/acy.

Got any photos?

Steve

 

[lunar4772]

Hi Steve
I can't seem to upload photos. I'll take some more and try again shortly.
It seems to be snowing outside where I do the refining. ( In May??? I gotta move! )
Frank