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Author: Subject: Separing C from CaC2 reaction with water
eanardi
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[*] posted on 9-12-2015 at 19:41
Separing C from CaC2 reaction with water


Hello everyone,
I have recently reacted a chunk of calcium carbide with water to use the acetilene produced by it. As one of the reaction's products is calcium hydroxide I decided to keep it and dry it off and all, but there still are some traces of carbon on the final powder, what should I do?
Thanks
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annaandherdad
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[*] posted on 9-12-2015 at 21:01


You could burn off the carbon in an open crucible. The calcium hydroxide might dehydrate to calcium oxide, but you could always add water to get calcium hydroxide back again.

But calcium hydroxide is cheap and getting it from the residue of CaC2 reactions is a lot of trouble. Besides commercial CaC2 likely has other contaminants in it besides carbon.




Any other SF Bay chemists?
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Amos
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[*] posted on 10-12-2015 at 05:04


You could just keep adding ice cold water until all of the calcium hydroxide dissolves, and quickly filter off the carbon.



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UC235
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[*] posted on 10-12-2015 at 10:55


I doubt that calcium hydroxide as a byproduct is going to be very pure. AFAIK, the feedstock is just limestone and coke (from coal).
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