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Cupronickel
Penny Pincher Member
USA
110 Posts |
 Posted - 03/28/2010 : 12:00:47
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In my work, I have to x-ray some of my castings and have a bunch of old x-ray films cluttering up my office. I know that there is silver in these films, does anyone know of a place that buys x-ray film to recover the silver?
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Kurr
1000+ Penny Miser Member
2906 Posts |
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Juan Manuel Arcos Frank
New Member
Mexico
19 Posts |
Posted - 03/28/2010 : 13:44:08
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Hi Folks!!!!!!!....look,my english is not good enough so please,be gentle with me.
You can recover that silver just preparing a 5% (in weight) solution of oxalic acid with water,I mean,to 950 ml of water add 50 gr of oxalic acid,stir well until the white powder dissolves then heat this solution to 95 C and the add you X ray films,maintain the temperature at 95 C and in 20 minutes the films will be completely clean.Stop heating,let settle down for a couple of minutes,rinse the films and put them off,pour off the liquid,dry the black mud and melt it...you will get 0.999 silver.
I hope it helps.
Kindest Regards from Mexico.
Manuel |
"Precious metal recovering gives me money,women take it away from me" |
Edited by - Juan Manuel Arcos Frank on 03/28/2010 13:45:58 |
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Nickelless
Administrator
USA
5580 Posts |
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Cupronickel
Penny Pincher Member
USA
110 Posts |
Posted - 03/28/2010 : 19:29:10
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| Thanks Juan Manuel and welcome to the forum! Your English is just fine, much better than my Spanish! |
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Juan Manuel Arcos Frank
New Member
Mexico
19 Posts |
Posted - 03/28/2010 : 20:30:47
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Thanks,Nickelless and Cupronickel.
Yes,Sir,cyanide will clean those black films but cyanide is more expensive than oxalic acid,furthermore handling cyanide represents a hard work and cyanide wastes need treatment.
Other processes for X ray film are sodium hydroxide,sodium hypochlorite,ferric chloride and nitric acid.I prefer oxalic acid process because it is the only process which yields to pure silver directly.
Kindest regards
Manuel |
"Precious metal recovering gives me money,women take it away from me" |
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tyoon21
Penny Sorter Member
52 Posts |
Posted - 03/29/2010 : 20:29:52
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Save it up and find a refiner. If you google "recycling x-rays" you get a couple companies that buy used film.
Depending on how much you have will determine if they buy it directly from you or send it to one of their collection facilities.
Last time I did it I got 75 cents a pound and it adds up quick. It's well worth saving.
Cheers. |
Take this job and shove it. I don't want to work here no more... |
Edited by - tyoon21 on 03/29/2010 20:31:34 |
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RNinDC
New Member
2 Posts |
Posted - 04/20/2010 : 23:59:21
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I would be intrested in buying them for a friends art project! If interested,please email me at edickersonrn@gmail.com
quote:
Originally posted by Cupronickel
In my work, I have to x-ray some of my castings and have a bunch of old x-ray films cluttering up my office. I know that there is silver in these films, does anyone know of a place that buys x-ray film to recover the silver?
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Exposed X-ray film
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