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Etanol
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Quote: Originally posted by Laboratory of Liptakov  |
This converter is patent protected by March 12, 2014. The owner of patent rights: Laboratory of Liptákov. You do not ask me any permission.
Asking for permission to be in the industrial and commercial use.
[Edited on 8-9-2014 by Laboratory of Liptakov] |
Thanks a lot for technique!
Never before have I carried out such a simple synthesis.
This is a great way to get rid of copper scrap.
Only one question: why do you think that the formula of TACN is [Cu(NH3)4](NO3)2 * 0.5 H2O , but not [Cu(NH3)4](NO3)2 ?
How do you identified the water?
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Laboratory of Liptakov
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Water was determined by mass analysis. Weight ratios. Decomposition TACN to CuO. Water (tied) in TACN is not a problem. VoD is high, 3600 m / s. With
aluminum 5% over 4000 m / s.
... ...LL
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C6(NO2)5CH2CH(CH3)N(NO2)2
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All the syntheses for this compound have seen required either a combination of a copper salt/oxide/hydroxide, AN and concentrated ammonia, or else
elemental copper, air, AN and concentrated ammonia. Would it be possible to do the reaction with weak 3% ammonia cleaner and then pour it into a tray
and evaporate?
Edit: sorry to bump an old thread, but I figured that it's best to have all the TACN data, old and new, in one thread.
[Edited on 30-1-2019 by C6(NO2)5CH2CH(CH3)N(NO2)2]
Put that in your pipe and smoke it!
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Laboratory of Liptakov
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Not. It will not works. Is necessary do it boiled 3% NH4OH in one container and insert rubber hose into distil water cooled on zero, better on -
10C. And create concentration minimal 24% NH4OH in aq.
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Elemental Phosphorus
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Can't TACN also be made from copper nitrate and ammonia? I tried this recently and got a dark blue solution, but no precipitate. The solutions used
were not very concentrated and hopefully that accounts for the lack of precipitate. Is it safe to just boil the solution?
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Laboratory of Liptakov
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Cool your solution to zero Celsius in ice bath and introduce ammonia gas NH3 into. It should produce a light blue solution and everything else
precipitates on TACN crystals. Process is pretty quick, should by takes 30 minute. If you have ammonia water 24%. If not, is necessary create it.
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XeonTheMGPony
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| Quote: Originally posted by Elemental Phosphorus | | Can't TACN also be made from copper nitrate and ammonia? I tried this recently and got a dark blue solution, but no precipitate. The solutions used
were not very concentrated and hopefully that accounts for the lack of precipitate. Is it safe to just boil the solution? |
Ya you want it to be as concentrated as possible.
I make a super concentrated copper nitrate solution, then chill and then direct gas ammonia through it.
Makes things a ton easier for post processing, filtering.
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Laboratory of Liptakov
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TACN
Maximal easy method for preparation TACN with recrystallization: https://www.youtube.com/watch?v=pSbU1DDKivg
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Etanol
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It is strange. Steel test showed Brisance of TACN/Al is less than pure TACN. Charges diam 19mm density 1.3g/cm3. How was VoD estimated?
[Edited on 31-5-2022 by Etanol]
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Laboratory of Liptakov
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Ideal density for TACN was tested. At 1,4 g /cc has lower brisance than at density 1,2 - 1,25. With aluminium or without.
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Etanol
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Charges diameter? Plastic / metall shell? There is important the ratio diameter:critical diameter.
I find 7mm at 0.8-1.0g /cc and 10mm at 1.25g /cc in plastic tube.
[Edited on 1-6-2022 by Etanol]
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Laboratory of Liptakov
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OK, it can be. But TACN is cheaper against TACP. Therefore usually is used bigger diameter, for example 20 - 25 mm. Or 50 mm as main charge.
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Etanol
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How is critical diameter of melt-cast mix
4.5% hexamine/45.5% ammonia nitrate/50% coarse-cristalline tetraaaminecopper nitrate
at density c.a. 1.7-1.8g/cc?
40mm? 50mm? 60mm?
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Laboratory of Liptakov
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I am afraid that this mixture will not works at this high density at all. Because TACN + 5% Al provide best brizantion at density 1,25g/cc. At
density 1.41 his brizantion fall on half. At diameter 25 mm. For described mixture I reccomend diameter 70 mm. With booster 5g HE. Only my
opinion....
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Marcello0922
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| Quote: Originally posted by Etanol |
Charges diameter? Plastic / metall shell? There is important the ratio diameter:critical diameter.
I find 7mm at 0.8-1.0g /cc and 10mm at 1.25g /cc in plastic tube.
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Hello everyone. I think this article will clear up a lot of doubts: Properties and detonation performance of tetraamminecopper(II) nitrate (TACN) –
a prospective green explosive.
In addition, I also have the results of the blast wave pressures generated by TACN and TACP in bulk and compressed form. The most interesting thing is
that in the pressed form it has a lower pressure value than for the bulk form.
Attachment: Properties and Detonation performance of tetraamminecopper(II) nitrate (TACN) - a prospective green explosive.pdf (3.3MB)
This file has been downloaded 139 times
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Etanol
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| Quote: Originally posted by Marcello0922 |
Hello everyone. I think this article will clear up a lot of doubts: Properties and detonation performance of tetraamminecopper(II) nitrate (TACN) –
a prospective green explosive.
In addition, I also have the results of the blast wave pressures generated by TACN and TACP in bulk and compressed form. The most interesting thing is
that in the pressed form it has a lower pressure value than for the bulk form.
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Thanks for the valuable experiments.
The critical diameter of about 20 mm at near-crystalline density is not so bad. I expected something like that. This retains the hope that a cast
mixture with 50% TACN will be capable to detonate in 45-50mm diameter.
At 0.8 g/cc, I do not think that your experimental maximum VoD of 2980 m/s is very different from theoretical. It is more likely that Cheetah Code
used inaccurate equalities of a state, especially molten metal copper. According to my estimates, the theoretical TACN VoD at 0.8g/cm3 should be
3200-3300m/s. This is close to your result.
However, according to your description of the synthesis, I have no certainty that your product is 100% TACN. Due to the fact that the reaction took
place at the usual temperature, the unrestrained Cu(OH)NO3 could remain inside the crystals of the TACN. This could reduce the detonation parameters.
In the synthesis, I achieve the complete dissolution of the solid substance in the hot excess of water ammonia and only then crystallizes by cooling
up to 0C.
Also, Dr Liptakov mentioned that crystallized from water ammonia product is a hydrate, which I personally doubt. However, it may make sense to dilute
the hot solution of TACN in ammonia with alcohol and only then cool it to 0C. Maybe this will lead to a more powerful waterless TACN.
It is very good that you give speed values for base 1 and base 2. My opinion is this is not a measurement error, but valuable information that
shows VoD increases or decreases. I think that the speed of the base 2 is closer to the true value for the specified diameter than the average value.
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Laboratory of Liptakov
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If I stated somewhere that TACN is a hydrate, it is a mistake. However, TACN can often be hygroscopic because it often contains NH4NO3 residue.
If quality recrystallization from aqueous concentrated ammonia 25% is carried out, TACN is no hygroscopic. Or only very little.....
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Marcello0922
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As for the hygroscopicity of TACN, the crude product was washed several times with methanol, so that when kept for several months in the package, it
did not change its properties and did not become covered with any residue. I also conducted tests to see if there would be a change in mass or the
appearance of changes under elevated humidity conditions (about 80%). Nothing of the sort occurred.
As for the purity of TACN - the synthesis was carried out at about 50 degrees C and the whole was cooled down. XRD studies confirmed that nothing else
but TACN was present. Maybe Cu(OH)NO3 is formed in small amounts and is soluble in methanol? After 2 rinses the alcohol solution was blue, after 3 it
was slightly blue, after 4 it was clear.
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Etanol
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| Quote: Originally posted by Marcello0922 | | Maybe Cu(OH)NO3 is formed in small amounts and is soluble in methanol? After 2 rinses the alcohol solution was blue, after 3 it was slightly blue,
after 4 it was clear. |
No. Cu(OH)NO3 is poorly soluble in water and insoluble in alcohol. Well, if XRD method is accurate enough, then everything is fine. I think the blue
color of the methanol solution is caused by the fact that methanol displaces liquid aqueous solution of TACN. When the product completely lost water,
the color disappears.
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