Hi boris, I have made AP via electrolysis using a homemade lead dioxide
plated MMO anode. I began the process with a normal mmo anode, converted
sodium chloride to sodium chlorate, then used the lead anode to convert the
sodium chlorate to sodium perchlorate, I then used sulphuric acid to
decompose the remaining sodium chlorate tho this route is not recommended
as it leaves an impossible to 100% eliminate contaminant of sodium sulphate
which makes getting any color other than yellow impossible.
The recommended route is to use a UV lamp to destroy the chlorates. Once
all chlorate is removed, I then add ammonium chloride which forms ammonium
perchlorate and sodium chloride.
Solution is then boiled to saturation and allowed to crystallize. Crystals
are then once again recrystalised and then dried. Potassium chloride can
then be added to the waste solution from the crystallization to extract
potassium perchlorate to maximize perchlorate yield. I have produced an
epoxy apcp motor with the AP produced this way.
I can put you in contact with the person who guided me through the process
of producing the lead anode and making the perchlorate.
Cheers,
Nikolai
On Fri, 05 Aug 2022, 23:13 Boris du Reau, <boris.dureau@xxxxxxx> wrote:
I know, AP is hard to find in Europe….. Yes I have tried to use barium,
sodium, strontium and potassium nitrate but none of them actually worked…
Talking about AP does anybody knows how to make some?
*De :* sugpro-bounce@xxxxxxxxxxxxx [mailto:sugpro-bounce@xxxxxxxxxxxxx] *De
la part de* Tr Mu
*Envoyé :* 05 August 2022 23:02
*À :* sugpro@xxxxxxxxxxxxx
*Objet :* [sugpro] Re: AP silicon propellant success!!!
Have you tested this with KNO3? AP is just so expensive but this looks
really good and I would like to try it in some smaller motors.
Trevor Mushung
On Fri, Aug 5, 2022, 3:40 PM Boris du Reau <boris.dureau@xxxxxxx> wrote:
Hello all
My friend Philippe and I have finally had success with AP/Silicon and
PP/silicon propellant after testing over 50 formulations and blowing up 5
or 6 casings and a teststand!!! We tested over 3 different silicones before
finding the right one. We ended up using a 2 part silicon normally used for
making mold.
We now have an easy to make, easy to ignite propellant (just an ematch is
required most of the time!!!)
I have done quite a few ground test and I have flown a 2 grains 38 mm from
Philippe (https://www.dr-cluster-rocketpropulsion.com/shop) a couple of
time with success
https://www.youtube.com/watch?v=HdmF5ZgMZDQ
The key to avoid blowing up your casing is to use lamp black.
Potassium perchlorate is a lot more challenging because it is really fast,
I have done some ground test, I will post some more videos and will
publishing the full results with the compositions for both AP and PP
The base composition that we are using with our composite silicone is :
AP or PP 72.74539113
lamp black 0.332170736
silicone 1 24.23185517
Silicone 2 2.69058296
Still need to do some measurements on the test stand (both casing pressure
and thrust)
I am also trying to add colours
The only down side that we have is that our silicon does not dry when
using carbonates (barium, calcium or strontium) so we will have to use
nitrates only to color the flame
Regards
Boris
