Hans - 31-7-2003 at 10:42
I am trying to decompose a water solution of urea 32.5 %wt by heating.
I figured that by heating i would vaporize the water and decompose the urea into NH3 and CO2.
The experiment went south as the channels in my heat exchanger glogged by something looking like limestone.
Can any of you boys and girls tell me what happend?
Basement Chemist - 31-7-2003 at 11:54
was there any thing else besides urea and H2O?
Decomposing Urea
Hans - 31-7-2003 at 12:33
Thanks for following up ;-) I am amazed that it is this easy to get in contact with guys this clever!
To "Basement Chemist":
The solution used is very clean, it is "Reduktan" from Hydro. It is based on distilled water. According to Hydro the inpurities is in order
of ppm.
To "xoo1246"
My interest is to fully convert the urea into ammonia without glogging - any ideas how to do this ?
[Edited on 1-8-2003 by Hans]
Theoretic - 1-8-2003 at 07:02
Hmmm, urea into ammonia...
Ca(OH)2+CO(NH2)2=>CaCO3+NH3
(melt)
AngelEyes - 1-8-2003 at 07:31
If you want ammonia, then just buy Sodium Hydroxide (as a drain unblocker @ 99%+ purity) and any ammonium fertiliser...the sulphate is cheap. Mix the
two and add a little water to kick start the reaction. This will generate Sodium Sulphate and copious amounts of Ammonium Hydroxide, which will give
off the ammonia.
2NaOH + (NH4)2SO4 -> Na2SO4 + 2NH4OH.
It's got to be the easiest and cheapest way to lots of fairly dry, gaseous ammonia.