| Pages:
1
2
3 |
zeppelin69
Harmless
Posts: 46
Registered: 20-2-2007
Member Is Offline
Mood: No Mood
|
|
I can't think of any nitrations where ammonium nitrate is not a suitable subsitute for alkali nitrates. In fact, in nearly every case that I can think
of, it is better. The only time I would use an alkali salt over AN is for distilling nitric without a vacuum, but thats another thread...
|
|
|
Rosco Bodine
Banned
Posts: 6370
Registered: 29-9-2004
Member Is Offline
Mood: analytical
|
|
What you think doesn't square with experimental results for nitrations of a particular precursor like aspirin
anyway. For whatever reason ammonium nitrate does not seem to be as good as either potassium nitrate or sodium nitrate in the nitrating activity with
sulfuric acid on aspirin. The same results apply to entirely different nitrations. For whatever reasons, certain combinations of a particular nitrate
with sulfuric acid will be found to work better for nitration of a particular precursor to produce a particular end result and the yield and purity
can vary significantly depending on whether you are using the optimum combination and nitration conditions or not. But there definitely isn't any
correct generalization that ammonium nitrate is an equivalent or superior substitute for an alkali nitrate in nitrations in general which simply don't
lend themselves to such generalizations. Experiments will show you that the combinations of reactants and ratios and conditions just aren't so
general as to fulfill that expectation it should make no difference. Chart some experimental nitration results and you will see this is true, in
contrast with your theory as to what should occur.
|
|
|
zeppelin69
Harmless
Posts: 46
Registered: 20-2-2007
Member Is Offline
Mood: No Mood
|
|
If you have any of these charts I'd very much like to see them, they sound interesting. If you don't have charts, could you at least post the data you
are basing this on?
|
|
|
| Pages:
1
2
3 |
![[*]](images/xpblue/default_icon.gif){kind=icon}
