Merryp
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Acetylide from NaOH + carbon - does this actually work?
There's an old patent claiming as much:
https://patents.google.com/patent/US2802723A/en?q=C01B32%2f9...
Seems a little too easy doesn't it? Compared to CaC2 requiring an arc furnace...
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SWIM
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Sodium carbide explodes in contact with water and gets so hot it glows when it is in a CO2 atmosphere.
At least according to a 1904 fire and explosion risk handbook I just checked.
So quenching it to get the acetylene would have to be done pretty carefully.
But 700 to 900 degrees instead of 2200 is one hell of an advantage.
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wg48temp9
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Quote: Originally posted by SWIM  | Sodium carbide explodes in contact with water and gets so hot it glows when it is in a CO2 atmosphere.
At least according to a 1904 fire and explosion risk handbook I just checked.
So quenching it to get the acetylene would have to be done pretty carefully.
But 700 to 900 degrees instead of 2200 is one hell of an advantage. |
From the patent the yield is between 0.4% and 4% so probably only care would be required 
I wounder why the yield is so low, perhaps its not stable enough at the synthesis temperature.
Apparently judging from its reactivity the bonding is very weak so it decomposes in the furnace almost as fast as its synthesised .
From google
I am wg48 but not on my usual pc hence the temp handle.
Thank goodness for Fleming and the fungi.
Old codger' lives matters, wear a mask and help save them.
Be aware of demagoguery, keep your frontal lobes fully engaged.
I don't know who invented mRNA vaccines but they should get a fancy medal and I hope they made a shed load of money from it.
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Armus_
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| Quote: Originally posted by wg48temp9 | | Quote: Originally posted by SWIM | Sodium carbide explodes in contact with water and gets so hot it glows when it is in a CO2 atmosphere.
At least according to a 1904 fire and explosion risk handbook I just checked.
So quenching it to get the acetylene would have to be done pretty carefully.
But 700 to 900 degrees instead of 2200 is one hell of an advantage. |
From the patent the yield is between 0.4% and 4% so probably only care would be required
I wounder why the yield is so low, perhaps its not stable enough at the synthesis temperature.
Apparently judging from its reactivity the bonding is very weak so it decomposes in the furnace almost as fast as its synthesised .
From google |
so wait since it is theoretically possible then is there a way to get a better yield like an inert atmosphere, catylist, or even just use a different
cation to begin with. like will calcium hydroxide work???
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hodges
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What about ammonium carbide? Seems it should exist - no idea how it would be synthesized though.
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rockyit98
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nope . no way dude! and that all i,m gonna say except what he described is how to make sodium. 6NaOH + 2C -------->2Na + 3H2+ 2Na2CO3
"A mind is a terrible thing to lose"-Meisner
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Armus_
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| Quote: Originally posted by rockyit98 |
nope . no way dude! and that all i,m gonna say except what he described is how to make sodium. 6NaOH + 2C -------->2Na + 3H2+ 2Na2CO3
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but sodium is more reactive than carbon on the reactivity series, it isnt really possible in normal conditions such as a redox reaction. the only
thing that is less reactive than sodium but that can still replace it is magnesium to my knowledge but carbon just reduces its oxidation state and if
it acted as an anion in this case then the sodium carbide is a plausible case to make here
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rockyit98
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| Quote: Originally posted by Armus_ | | Quote: Originally posted by rockyit98 |
nope . no way dude! and that all i,m gonna say except what he described is how to make sodium. 6NaOH + 2C -------->2Na + 3H2+ 2Na2CO3
|
but sodium is more reactive than carbon on the reactivity series, it isnt really possible in normal conditions such as a redox reaction. the only
thing that is less reactive than sodium but that can still replace it is magnesium to my knowledge but carbon just reduces its oxidation state and if
it acted as an anion in this case then the sodium carbide is a plausible case to make here |
do your research before shouting out. https://en.wikipedia.org/wiki/Sodium#Commercial_production
"A mind is a terrible thing to lose"-Meisner
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Armus_
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| Quote: Originally posted by rockyit98 | | Quote: Originally posted by Armus_ | | Quote: Originally posted by rockyit98 |
nope . no way dude! and that all i,m gonna say except what he described is how to make sodium. 6NaOH + 2C -------->2Na + 3H2+ 2Na2CO3
|
but sodium is more reactive than carbon on the reactivity series, it isnt really possible in normal conditions such as a redox reaction. the only
thing that is less reactive than sodium but that can still replace it is magnesium to my knowledge but carbon just reduces its oxidation state and if
it acted as an anion in this case then the sodium carbide is a plausible case to make here |
do your research before shouting out. https://en.wikipedia.org/wiki/Sodium#Commercial_production |
sorry, its really cool to know actually. i was thinking about it being reduced instead of making metallic sodium is because of for instance sodium
nitrate and carbon makes sodium nitrite. sorry about that, but that is really interesting, i may want to look further into that actually
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