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Author: Subject: Copper Citrate Production
screamsofsilence
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[*] posted on 29-12-2011 at 10:18
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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[*] posted on 29-12-2011 at 10:26


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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[*] posted on 29-12-2011 at 10:32


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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[*] posted on 29-12-2011 at 10:36


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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[*] posted on 29-12-2011 at 10:42


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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[*] posted on 29-12-2011 at 10:52


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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[*] posted on 29-12-2011 at 11:46


1. Too slow.
2. I am not sure, just test it.




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[*] posted on 29-12-2011 at 12:25


Quote: Originally posted by screamsofsilence  
What if I allowed the copper to rust, and then put citric acid onto the CuO? That would work wouldn't it?


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]




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screamsofsilence
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[*] posted on 29-12-2011 at 17:17


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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[*] posted on 30-12-2011 at 04:18


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? :D




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[*] posted on 30-12-2011 at 04:56


Maybe he needs a lot of Benedict's reagent.



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[*] posted on 30-12-2011 at 05:56


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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[*] posted on 30-12-2011 at 16:34


See this post and thread.
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[*] posted on 1-1-2012 at 02:14


How about trying to react CuSO4 with Calcium Citrate. If reaction is successful, then you can filter out the CaSO4 formed. :D



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[*] posted on 2-1-2012 at 19:11


Quote: Originally posted by Paddywhacker  
See this post and thread.


Thank you!
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