Hellbat
Harmless
Posts: 16
Registered: 23-2-2014
Member Is Offline
Mood: No Mood
|
|
Hydrazine hydrate by calcium hydroxide method
Hi there, can anyone tell me how exactly hydrazine hydrate is made from hydrazine sulfate and calcium hydroxide? The last one is nearly unsoluble in
water, so it's not possible to react them as solutions, right?
Best regards
Hellbat
|
|
|
Bert
|
Thread Moved
6-1-2016 at 08:00 |
Bert
Super Administrator
Posts: 2821
Registered: 12-3-2004
Member Is Offline
Mood: " I think we are all going to die. I think that love is an illusion. We are flawed, my darling".
|
|
Tons of existing hydrazine related threads here...
https://www.google.com/search?q=sciencemadness.org+hydrazine...
Rapopart’s Rules for critical commentary:
1. Attempt to re-express your target’s position so clearly, vividly and fairly that your target says: “Thanks, I wish I’d thought of putting it
that way.”
2. List any points of agreement (especially if they are not matters of general or widespread agreement).
3. Mention anything you have learned from your target.
4. Only then are you permitted to say so much as a word of rebuttal or criticism.
Anatol Rapoport was a Russian-born American mathematical psychologist (1911-2007).
|
|
|
Hellbat
Harmless
Posts: 16
Registered: 23-2-2014
Member Is Offline
Mood: No Mood
|
|
I have already spent some time searching for that synthesis, but I have not found anything about the way hydrazine sulfate can react with calcium
hydroxide, I just found information about other methods of making hydrazine. If potassium hydroxide is used instead, the two powdersare just mixed and
water is added, but the hydrazine must be distilled off which I would not like to do.
Now, I'm not sure whether it's the same procedure with the calcium hydroxide or not. If there's already a thread on that topic here on the board,
please send me the link as I haven't found one yet.
|
|
|
Hellbat
Harmless
Posts: 16
Registered: 23-2-2014
Member Is Offline
Mood: No Mood
|
|
So, nobody knows about that method?
|
|
|
hissingnoise
International Hazard
Posts: 3940
Registered: 26-12-2002
Member Is Offline
Mood: Pulverulescent!
|
|
You'll probably have to distill anyway, since your hydrazine will likely contain some dissolved gypsum . . .
|
|
|
Hellbat
Harmless
Posts: 16
Registered: 23-2-2014
Member Is Offline
Mood: No Mood
|
|
But gypsum is nearly insoluble....
|
|
|
hissingnoise
International Hazard
Posts: 3940
Registered: 26-12-2002
Member Is Offline
Mood: Pulverulescent!
|
|
Its solubility is; 0.24 g/100ml at 20 °C.
BaSO4 is much less so!
Distillation isn't particularly difficult but the high pH will etch your glass slightly . . .
|
|
|
Hellbat
Harmless
Posts: 16
Registered: 23-2-2014
Member Is Offline
Mood: No Mood
|
|
Yeah, but I don't want my distillation apparatus to explode from a hydrazine air mixture. So if I took Ba(OH)2 instead, maybe I could just
dissolve both chemicals in water, pour them together and filter off the BaSO4?
|
|
|
hissingnoise
International Hazard
Posts: 3940
Registered: 26-12-2002
Member Is Offline
Mood: Pulverulescent!
|
|
The hydrate doesn't normally form ignitable mixtures with air, but you should check out the links Bert gave?
|
|
|
Hellbat
Harmless
Posts: 16
Registered: 23-2-2014
Member Is Offline
Mood: No Mood
|
|
I did, but as I said there was nothing about the Ca/Ba method. The only thing I've heard is that the BaSO4 formed can just be filtered off at the end
and no distillation is required. So, I'm wondering how exactly the reaction is done then. Maybe, the hydrazine sulfate and barium hydroxide are just
dissolved in water and poured together?
|
|
|
hissingnoise
International Hazard
Posts: 3940
Registered: 26-12-2002
Member Is Offline
Mood: Pulverulescent!
|
|
| Quote: | | The only thing I've heard is that the BaSO4 formed can just be filtered off at the end and no distillation is required. |
Because of its reactivity, I would say distillation is required in all cases!
|
|
|
![[*]](images/xpblue/default_icon.gif){kind=icon}
