MineMan
National Hazard
Posts: 998
Registered: 29-3-2015
Member Is Offline
Mood: No Mood
|
|
Hexamine the Amazing Fuel! And Alternatives.
Alright fellow nerds, here is the deal!
Hexamine is an amazing fuel that adds a lot of brisance to compositions. For example, if we take standard 70/30 flash powder, and take away 10 parts
aluminum and replace it with 5 parts fine hexamine powder the mix will become much more explosive and brisant... But it's impact sensitivity becomes
that of a chlorate flash powder or even a chlorate flashpowder with sulfur. Upon impact the hexamine flash powder mix with create a sharp crack,
different from without the hexamine.
For example we know that AN compositions are among the most insensitive... but yet the Gorden Mix is just AN and Hexamine (yes at a molecular level)
and it just needs a #6 cap!
Are there any similar fuels to hexamine that will provide the same brisance without the insane sensitivity? Does it have any cousins?
Someone in scientific paper suggested lactose monohydrate?
|
|
|
j_sum1
Administrator
Posts: 6225
Registered: 4-10-2014
Location: Unmoved
Member Is Offline
Mood: Organised
|
|
FWIW, I know that most hexamine fuel tablets have trioxane in them as well. IIRC, around 30% is typical.
|
|
|
Corrosive Joeseph
National Hazard
Posts: 915
Registered: 17-5-2015
Location: The Other Place
Member Is Offline
Mood: Cyclic
|
|
It would be nice to know which brands are the purest............
Some discussion here -
http://www.sciencemadness.org/talk/viewthread.php?tid=17403
/CJ
[Edited on 17-3-2017 by Corrosive Joeseph]
Being well adjusted to a sick society is no measure of one's mental health
|
|
|
XeonTheMGPony
International Hazard
Posts: 1636
Registered: 5-1-2016
Member Is Offline
Mood: No Mood
|
|
Depends on the brand, here I get a brand called nesbit I think it was only impurity is the wax binder, to get rid of this I ruffly crush it then I put
it on the hot plate set to enough to pre-warm the beaker then slowly add distilled water till ti is all completely dissolved and the wax melted.
I then cool in the fridge and remove the solid wax cap and then place on the hot plate to evaporate the water till a super saturate is formed, then
cool in freezer filter off crystals rinse and repeat till you have as much recovered as you can tolerate repeating the process lol.
In the end you are left with nice white granular crystals of nice clean hexamine
I'm going to start making it though as I can make pure hexamine via Ammonia and methanol as feed stock.
Tube furnace with copper catylest to form formaldehyde that is then fed into my reaction vessel with concentrated ammonia water
[Edited on 17-3-2017 by XeonTheMGPony]
|
|
|
MineMan
National Hazard
Posts: 998
Registered: 29-3-2015
Member Is Offline
Mood: No Mood
|
|
cool...so back to the question, are there any somewhat readily available alternatives to hexamine...?
I am guessing the molecule would have to have nitrogen to give it the same great properties as hexamine?
|
|
|
Laboratory of Liptakov
International Hazard
Posts: 1336
Registered: 2-9-2014
Location: Technion Haifa
Member Is Offline
Mood: cool.gif
|
|
Glycine
Glycine http://www.bulkpowders.co.uk/glycine.html
Development of primarily - secondary substances CHP (2015) Lithex (2022) Brightelite (2023) Nitrocelite (2024)
|
|
|
PHILOU Zrealone
International Hazard
Posts: 2893
Registered: 20-5-2002
Location: Brussel
Member Is Offline
Mood: Bis-diazo-dinitro-hydroquinonic
|
|
What is 70/30 standard flash powder? KNO3, KClO3 or KClO4 based?
Glycoluril?
Urea?
Biuret?
Cyanamide or dicyanamide (perchlorate)?
Guanidine (perchlorate)?
Biguanidine (diperchlorate)?
Ethylene diamine (diperchlorate)?
Succinic dinitrile (= dicyanoethane)?
Melamine?
Trinitrotriaminobenzene?
Trinitrotrihydrazinobenzene?
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)
|
|
|
JJay
International Hazard
Posts: 3440
Registered: 15-10-2015
Member Is Offline
|
|
I use hexamine as a backpacking fuel sometimes. I'm not aware of any substitutes on the market.
I've actually never used it for chemistry, but I know it has uses there as well.
|
|
|
XeonTheMGPony
International Hazard
Posts: 1636
Registered: 5-1-2016
Member Is Offline
Mood: No Mood
|
|
Hexamine was all so used in the old days as a urin acidifier to prevent chronic bladder infections in people susceptible to them.
It is a robust chemical, why I want to make a plant to make it.
|
|
|
MineMan
National Hazard
Posts: 998
Registered: 29-3-2015
Member Is Offline
Mood: No Mood
|
|
Philoue, young padawan, much disappointed in you I am. Always, standard flash 70/30 stands for KPerchlorate and GD Al. Much training you have!
I tried creatine which has a very similar formula to hexamine. It increased the explosiveness like hexamine without increased sensitivity... but, it
only had 1/5th the power from witness plate test. Erythitol works ok... trioxane does not work...
May dm/dt (change in momentum over change in time... true definition of force) be with you!
|
|
|
PHILOU Zrealone
International Hazard
Posts: 2893
Registered: 20-5-2002
Location: Brussel
Member Is Offline
Mood: Bis-diazo-dinitro-hydroquinonic
|
|
Quote: Originally posted by XeonTheMGPony  | Hexamine was all so used in the old days as a urin acidifier to prevent chronic bladder infections in people susceptible to them.
It is a robust chemical, why I want to make a plant to make it. |
Not an urin acidifier at all...
The infection is reduced because hexamin produces a discrete form of basicity (acid scavenger) and set some formaldehyde free (very strong
disinfection media)...the toxicity of hexamine is surprisingly quite low despite the NH3 and CH2=O liberation upon mild hydrolysis...but it must be
due to the very low level.
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)
|
|
|
XeonTheMGPony
International Hazard
Posts: 1636
Registered: 5-1-2016
Member Is Offline
Mood: No Mood
|
|
| Quote: |
Hexamethylenetetramine or methenamine is a heterocyclic organic compound with the formula ... Urinary acidity is typically ensured by co-administering
vitamin C (ascorbic acid) or ammonium chloride. Its use had temporarily been reduced in . |
https://en.wikipedia.org/wiki/Hexamethylenetetramine
| Quote: |
the active ingredient hexamine or methenamine is considered an anti-infective antibiotics type of medication. The medication works by turning urine
acidic |
https://www.pharmacygeoff.md/Hiprex_Hexamine_Hippurate_1g_10...
The Re leas of formaldehyde is the second active method but primary preventive is the acidity, cranberries work as well.
That took all of two seconds on google to correct you I double checked my info befor posting as well. Bacteria thrive in basic bladder conditions, any
medication that made it more alkaline would be worthless for a normal healthy individual!
[Edited on 22-3-2017 by XeonTheMGPony]
[Edited on 22-3-2017 by XeonTheMGPony]
|
|
|
PHILOU Zrealone
International Hazard
Posts: 2893
Registered: 20-5-2002
Location: Brussel
Member Is Offline
Mood: Bis-diazo-dinitro-hydroquinonic
|
|
| Quote: Originally posted by MineMan | Philoue, young padawan, much disappointed in you I am. Always, standard flash 70/30 stands for KPerchlorate and GD Al. Much training you have!
I tried creatine which has a very similar formula to hexamine. It increased the explosiveness like hexamine without increased sensitivity... but, it
only had 1/5th the power from witness plate test. Erythitol works ok... trioxane does not work...
May dm/dt (change in momentum over change in time... true definition of force) be with you! |
OK Master MineMan-yodha.
It was just to be sure what was into your product...not all ingrédients are compatible with KClO3...but with KNO3 or KClO4 as you used no problem.
The explosive power increase comes from the gas effect...while KClO4/Al only produces expansion of the entrapped air gas; other fuels than Al will
produce permanent gases.
If KClO3 was used, the sensitivity and detonability would be enhanced by some such extra ingredients...then the witness plate would be more
damaged...KClO4 is too stable to allow for detonation...maybe fast deflagration.
Yes  may the
F= m*a = m*dv/dt = m*dx/(dt)²
be with us.
[Edited on 22-3-2017 by PHILOU Zrealone]
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)
|
|
|
![[*]](images/xpblue/default_icon.gif){kind=icon}
