chloric1 - 28-6-2006 at 17:43
I may have stumbled upon a homebrew method of guanidine salt synthesis that could produce good yields( 35-70%). Problem is Ammonium sulfate would be
generated along with the guanidine sulfate. I searched for solubility information on guanidine sulfate and I found nothing. Does anybody know how
guanidine sulfate varies in water solubility via temperature curves? Does Ammonium sulfate reduce its solubility. I do know from CRC that both
sulfates are insoluble in alcohol but nothing more.
neutrino - 28-6-2006 at 18:30
Is Guanidine stable in basic conditions?
If so, try adding some calcium hydroxide. The sulfate will precipitate and the ammonium ions should form free ammonia.
Then again, you're starting with a solid and ending with a solid. Hmm...it could be worth a try, at least.
[Edited on 29-6-2006 by neutrino]
chemoleo - 28-6-2006 at 18:37
No, it's a good idea! I played with guanidine base solutions before, it is stable in the short term. Yeah, precipitate all the sulphate with calcium,
barium, or lead, then bubble CO2 throug it. This forms guanidine carbonate, or bicarbonate, which should precipitate - I tried to access lambdasyn
which has more info on this, but it is down at the moment.
Anyway, even if it doesn't precipitate, ammonium bicarbonate is volatile, so even a slight temperature increase should remove the NH4HCO3, while the
guanidinium sulphate persists.
What is that production method of yours?
Patented process
chloric1 - 29-6-2006 at 02:42
My process is based on US2464247 granted to American Cyanamide Company in 1949. To make a long story short, urea is fused with Ammonium sulfamate in
a 1:3 molar ratio. The best yields come from 300 grams of urea and 1140 grams of ammonium sulfamate. I need to crank out some sewrious Ammonium
sulfamate!
Mychemlife - 5-11-2017 at 12:26
Is there a way to synth the ammonium sulfamate from OTC sources or e.g sulfamic acid?
Ammonium sulfamate
Mychemlife - 5-11-2017 at 12:34
I figured it out right after I posted.
I should have thought about it for a second before posting.
I apologize. Answer: Neutralize sulfamic acid with ammonium hydroxide