screamsofsilence
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Copper Citrate Production
Hello, I was wondering if anyone knew a good way to make Copper citrate, the reason I want to know is because Copper citrate can be used to preserve
wood, and I'm a bit of a nut in that I like to do as much as I can by hand. My first thought was to use orange juice and copper metal or to somehoe
isolate the acitric acid from orange juice and then react it with copper, any thought are greatly appreciated, thanks in advance  .
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Adas
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Start from copper sulfate:
CuSO4 + NaHCO3 ----> CuCO3 + CO2 + H2O
CuCO3 is insoluble, so wash it with water and filter (to get more pure product)
CuCO3 + CA ----> copper citrate
[Edited on 29-12-2011 by Adas]
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screamsofsilence
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Do you think there is anyway to do it starting with copper metal? As that is much easier to obtain than CuSO4. But thank you for the great advice .
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Adas
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Cu + H2O2 + citric acid, if you want to waste H2O2 :/
Purchasing some CuSO4 is far more economical.
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screamsofsilence
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What if I allowed the copper to rust, and then put citric acid onto the CuO? That would work wouldn't it?
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screamsofsilence
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Apparently Ammoniacle copper citrate works better, so could I just mix ammonia, copper metal, and citric acid in a water solution?
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Adas
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1. Too slow.
2. I am not sure, just test it.
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bbartlog
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Copper doesn't rust (oxidize) easily. You would need to force the issue with an oxidizer of some sort.
Quote: Originally posted by Adas  | Cu + H2O2 + citric acid, if you want to waste H2O2 :/
Purchasing some CuSO4 is far more economical. |
Maybe... in my neck of the woods copper sulfate is about $2.50 per mole OTC, whereas copper is less than $0.25 per mole (as old pennies) and hydrogen
peroxide (as 35% solution) is also about $0.25 per mole. Of course things may be totally different depending on your supplier(s).
[Edited on 29-12-2011 by bbartlog]
The less you bet, the more you lose when you win.
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screamsofsilence
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I think I will use old pennies as bbartlog suggested, and if I heat the pennies in a citric acid solution it may take a little while but eventually I
would have copper citrate.
[Edited on 30-12-2011 by screamsofsilence]
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Endimion17
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Citric acid is quite cheap. Copper(II) sulphate is also quite cheap. Sodium hydrogencarbonate is quite cheap, too.
How much copper(II) citrate do you need? Are you preserving a battleship? 
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Bot0nist
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Maybe he needs a lot of Benedict's reagent.
U.T.F.S.E. and learn the joys of autodidacticism!
Don't judge each day only by the harvest you reap, but also by the seeds you sow.
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screamsofsilence
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I know that using copper sulfate to get copper carbonate would be the easiest way, however buying the chemicals somehow ruins the feeling of doing it
myself, I plan on isolating the citric acid from fruits, I know this is an unnecessary hassle but it's really just about seeing if I can do it, and
it's good practice.
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Paddywhacker
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See this post and thread.
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rstar
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How about trying to react CuSO4 with Calcium Citrate. If reaction is successful, then you can filter out the CaSO4 formed.
"A tidy laboratory means a lazy chemist "
- Jöns Jacob Berzelius
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screamsofsilence
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Thank you!
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