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Author: Subject: RDX from dilute HNO3
Pard
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[*] posted on 19-1-2014 at 02:32
RDX from dilute HNO3


Hello

I read a thread on here on the PETN thread that gives a table for calculating the amount of H2SO4 to add to HNO3, when dilute.

Would this same technique work for RDX? I wouldn't think so. Everything I've read indicates it needs 90% percent but as the PETN similarly requires high percentage, I wondered if if the sulfurics effect on the water in the HNO3 might make it work able. I think no but just thought I'd ask and consider it a learning experience. It seems distillation of the hno3 is unavoidable.

I can try find the mention post if needed
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Dornier 335A
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[*] posted on 19-1-2014 at 02:44


Sulfuric acid decomposes hexamine. That's why mixed acid can't be used in the production of RDX. WFNA has to be used instead.
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DubaiAmateurRocketry
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[*] posted on 19-1-2014 at 04:09


What about 70% Nitric acid and P2O5 ? Will it increase RDX yeild ? or some HMX along with it ? I've seen Ac2O/HNO3, however I havent seen HNO3/P2O5 nitration on hexamine yet.
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[*] posted on 19-1-2014 at 06:25


yes it will.. indeed it will
P2O5 produces acetic acid with water

the question is ratios, you might wanna experiment and write down some ratios that work?

http://puu.sh/6qqcf.txt

this regards HMX and DPT from HDN, if im not entirely wrong, another compound near if not above RDX's properties





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https://en.wikipedia.org/wiki/Solubility_table
http://www.trimen.pl/witek/calculators/stezenia.html
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[*] posted on 19-1-2014 at 07:14


Quote:
...P2O5 produces acetic acid with water...

Sheeesh! P2O5is the anhydride of phosphoric acid!




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DubaiAmateurRocketry
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[*] posted on 19-1-2014 at 07:16


I was just about to point that out, he probably made a mistake... any ways, P2O5 seem to work, ofcourse ill record whatever i do, if I ever have the chance. Shipping through dubai is a hard...long...expensive process.
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[*] posted on 19-1-2014 at 07:35


Save your money ─ if P2O5 worked in the nitrolysis it'd be very widely known . . .



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[*] posted on 19-1-2014 at 07:43


Well it is, its used in many synthesis. P2O5 could also produce NO2+ like sulfuric acid.
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[*] posted on 19-1-2014 at 18:14


I guess it will need to just distill it. I didn't think so, but thought I'd ask. I do remember seeing a tek posted here involved Glacial Acetic Acid. Though I don't think it had good yields.
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[*] posted on 19-1-2014 at 19:18


Anyone ever try mixed acid nitration of Hexamine or HDN using 70% HNO3 and excess 85% H3PO4 ?



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