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Author: Subject: Silver azide synthesis question?
Thraxx
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[*] posted on 8-12-2016 at 02:03


Quote: Originally posted by Bert  
Mix Mercury fulminate with Lead azide, then you can't use either Cu or Al for container? What would you load that mix in?

90:3 Mercury fulminate:Silver azide allowed reduction of primary weight of S&B compound blasting caps from 250mg to 60, from litterature I just looked at. As percussion primer mix for cartridge use? It seems it would be too brissant.

Or does the word "primer" in your country = "blasting cap" in USA?


In my country assignet the word "primer "the initiating stuff in the blasting cap .And the HE brizant in blasting cap is then "secondary".The percussion primer is assignet like "fuse".

The mixture of lead azide + merc.fulminate is used by Stettbacher for his lectures.Alfred Stettbacher was more university speaker than man of praxis.Verry funny was his work abbout "Langzeitz├╝nders".
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XeonTheMGPony
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[*] posted on 8-12-2016 at 09:45


In reference to the metal issue here is my solution for the issue.

for my caps I use a paper wound tube about 1/8 diameter to press the comp delay into.

But since using peroxides as of late (I Do not have the necessities to make azids atm glass wear wise)

for safety reasons and using smaller amounts I started to press the peroxides into the paper tube first, then I load delay comp, this assembly then gets pressed into the preloaded metal tube with the 500mg etn, since this takes much less pressure to assemble

This has the added advantage of guiding the det wave down wards due to the higher confinement, the delay comp leaves a ash matrix above providing downward confinement, and due to the thick paper wrapping has much stronger axial confinement.

the added safety benefit of this system is all so the fact that if it goes off while pressing you have confetti and not shrapnel, and depending on your paper choice no issues with the bulk of primers out there.

[Edited on 9-12-2016 by XeonTheMGPony]
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Thraxx
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[*] posted on 8-12-2016 at 11:35


To Silver Azide:

I worked in acording to Hodgkinson patent from y. 1918(which was outgoing from work of Angelo 1893)Angelo:

Hydr.sulfate+AgNO2==AgN3 +2H2O + H2SO4

Hodgkinson:
Hydr.sulfate + AgNO3+NaNO2==AgN3+2H2O+NaNO3+H2SO4

Rations counted from Hodgkinsons patent:
1 Step:130 g Hdr.Sulfate(1mol) diluted in 500 ml watter with

help of added NH4OH to the weak acidity.Discussion-is this the

"hydrazine ammonium sulphate"?could help more NH4 ?

(Costain pat. 3943235,Taylor pat. 781440 GB.)

2 Step : 70g NaNO2(1 mol) diluted in 500 ml watter

3.Step: 170 g AgNO3 diluted in 1000 ml watter and acidified with 1ml of 70%HNO3.

After I put it together was it nice milk and after 10 min it turned pink and then after 10 min was all black black and black with metallic stains on surface.


This manner of manufacture AgN3 was described in patent of Hodgkinson GB 128014.

I did it many times and saw,that the reaction is in the reality white poridge of insoluble AgNO2 with metallic silver and big bubbles H2(?).Is here somebody who can do this patent?

[Edited on 15-10-2016 by Thraxx]

[Edited on 15-10-2016 by Thraxx]

[Edited on 15-10-2016 by Thraxx]

Attachment: GB128014 (Hodgison silver azide from hydrazine).pdf (184kB)
This file has been downloaded 266 times

[Edited on 15-10-2016 by Thraxx]
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Etanol
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[*] posted on 10-12-2016 at 07:54


Quote: Originally posted by Thraxx  
To Silver Azide:

1 Step:130 g Hdr.Sulfate(1mol) diluted in 500 ml watter with



Try to increase the amount of water to 3 000 ml and not add ammonia.
Under alkaline environment there is a reaction
(Ag+) +N2H4 = Ag + N2

Under acid environment AgN3 is formed for a few hours.
T=20...30C
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Thraxx
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[*] posted on 10-12-2016 at 08:40


Quote: Originally posted by Etanol  
Quote: Originally posted by Thraxx  
To Silver Azide:

1 Step:130 g Hdr.Sulfate(1mol) diluted in 500 ml watter with



Try to increase the amount of water to 3 000 ml and not add ammonia.
Under alkaline environment there is a reaction
(Ag+) +N2H4 = Ag + N2

Under acid environment AgN3 is formed for a few hours.
T=20...30C

Thank you Etanol,,I found comentary of Rosco Bodine to this patent :

"After many careful experiments have been done without success
at reproducing the results described by GB128014 , I am reasonably
sure the method described by the patent is BOGUS and unworkable .

I used pure chemicals , accurately measured and controlled
conditions of pH in different experiments , in increments of
two tenths of a pH across the range from pH 5 to pH 7.2 .

I tried following the patents process description exactly ,
and I tried variations of every sort I could contemplate ,
with no joy in producing azides except in useless trace quantity
mixed with inert undesired by products .

On rare occasion I have encountered this scenario before ,
where a patent makes disclosure of a technology which does
not withstand scrutiny . There is no way of being sure about
the validity of what is reported by a patent except to experiment
and thereby put the matter to the test , which I have done .

My "finding" regarding GB128014 is that the information it
discloses is either incorrect or incomplete , and the process
it describes is *NOT* a straightforward nor valid method for
the synthesis of azides ."

It seems me that this patent is lie like many others.
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