Butterflywings
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How to separate Cerium dioxide and copper?
I have a solution of Cerium dioxide and copper but I only want the Cerium dioxide. How to extract or separate them?
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phlogiston
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Leach with hydrochloric or sulfuric acid. This will dissolve the cerium oxide and leave the copper.
If you desire cerium oxide, rather than its chloride or sulphate, it should be possible to precipitate it from the solution by boiling with a mixture
of permanganate and carbonate in a 1:4 ratio (never tried it myself).
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DJF90
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He says he has a solution of the two, which is impossible given they're both insoluble. If they've been digested in nitric acid, you might be able to
precipitate the cerium as ceric ammonium nitrate.
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Endimion17
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Who knows what he actually meant to say...
"solution of cerium dioxide and copper" - that's absurd. I'd understand if he said "a solution of cerium and copper", that would be a nice start, as
it would probably be an aqueous mixture of their nitrates or other soluble salts.
This could be a heterogeneous mixture of cerium oxide dust and copper turnings/powder, but who knows...
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blogfast25
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Smacks of a badly copied chemistry class question to me... If not, butterfly should flap his wings and rephrase more precisely.
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Butterflywings
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Sorry what I meant was Cerium and copper.
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Butterflywings
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Sorry what I meant was Cerium and copper.
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AndersHoveland
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Cerium salts have the unique property of not being very soluble in nitric acid, under certain conditions. Basic ceric nitrate has a low solubility.
http://pubs.acs.org/doi/abs/10.1021/ja02221a005
I think its formula is CeO(NO3)2
[Edited on 9-11-2012 by AndersHoveland]
I'm not saying let's go kill all the stupid people...I'm just saying lets remove all the warning labels and let the problem sort itself out.
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blogfast25
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Ceric ammonium sulphate (cerium (IV) ammonium sulphate) is also only sparingly soluble in water. Perhaps adding the required amounts of ammonium
sulphate could crystallise it out of the solution? CuSO4 is highly soluble by contrast and doesn't form a double salt with ammonium sulphate.
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ElectroWin
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copper forms a soluble ammonia complex, Cu(NH3)4 2+,
does cerium form such a complex?
[Edited on 2012-11-09 by ElectroWin]
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blogfast25
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Quote: Originally posted by ElectroWin  | copper forms a soluble ammonia complex, Cu(NH3)4 2+,
does cerium form such a complex?
[Edited on 2012-11-09 by ElectroWin] |
No, it doesn't. Good point.
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