tank man
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My failure in making petn
First,i am a chinese and my english is not very good, in larst week,my first time in making petn,i add pentaerythrite which isnt been grinded to mixed
acid ,pentaerythrite isnt dissolve and temperature isnt rise
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tank man
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Why
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Chisholm
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We need much more information about what you did. An estimate of how much of each reactant, the addition rate, how long you waited, how you measured
the temperature, etc.
PETN doesn't readily dissolve in mixed acid; you have to add the pentaerythrite slowly to very concentrated nitric acid (HNO3), let it
dissolve, and only then add the sulfuric acid (H2SO4), very slowly.
If the pentaerythrite isn't powdered, but is instead large chunks, then it would dissolve so slowly in mixed acid that the reaction could take a very
long time, releasing heat so slowly that it wasn't noticeable.
NOTE: PETN requires very concentrated nitric acid (at least 90%, preferably 98% or more) to get decent yields. If all you have is 67% or 70% nitric
acid, you could try using more sulfuric acid than normal, but your yield will still be low.
[Edited on 5-19-2017 by Chisholm]
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tank man
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Quote: Originally posted by Chisholm  | We need much more information about what you did. An estimate of how much of each reactant, the addition rate, how long you waited, how you measured
the temperature, etc.
PETN doesn't readily dissolve in mixed acid; you have to add the pentaerythrite slowly to very concentrated nitric acid, let it dissolve, and only
then add the sulfuric acid, very slowly.
If the pentaerythrite isn't powdered, but is instead large chunks, then it would dissolve so slowly in mixed acid that the reaction could take a very
long time, releasing heat so slowly that it wasn't noticeable. thanks，i will have anther experiment when i go to school next week
[Edited on 5-19-2017 by Chisholm] |
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Laboratory of Liptakov
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Here is procedure in pictures for all harmless: https://vimeo.com/217289797
Development of primarily - secondary substances CHP (2015) Lithex (2022) Brightelite (2023) Nitrocelite (2024)
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Melgar
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Anyone else take note of his username?
https://www.google.com/search?q=tank+man&tbm=isch
[Edited on 6/23/17 by Melgar]
The first step in the process of learning something is admitting that you don't know it already.
I'm givin' the spam shields max power at full warp, but they just dinna have the power! We're gonna have to evacuate to new forum software!
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PHILOU Zrealone
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What about tank girl then...Popopeyooo :-)
PH Z (PHILOU Zrealone)
"Physic is all what never works; Chemistry is all what stinks and explodes!"-"Life that deadly disease, sexually transmitted."(W.Allen)
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