vano
National Hazard
Posts: 661
Registered: 22-3-2019
Location: Georgia
Member Is Offline
|
|
Cerium dioxide from ceric ammonium nitrate
I just thermally decomposed ceric ammonium nitrate. I heated it at 200 C. then raised the temperature to 250-280 degrees and calcine it for another 2
hours.
|
|
|
woelen
Super Administrator
Posts: 7976
Registered: 20-8-2005
Location: Netherlands
Member Is Offline
Mood: interested
|
|
How reactive is this CeO2? Can it be dissolved in acids? I have some CeO2, and that material is extremely inert and cannot be dissolved in
concentrated acids, not even by boiling the acid. So, I am wondering how reactive your product is. I would like to have some CeO2, which is
sufficiently reactive that it can be used to make other Ce-salts.
|
|
|
Bedlasky
International Hazard
Posts: 1219
Registered: 15-4-2019
Location: Period 5, group 6
Member Is Offline
Mood: Volatile
|
|
Why did you make useless CeO2 from usefull ammonium cerium(IV) nitrate?
Woelen: https://www.sciencemadness.org/whisper/viewthread.php?tid=15...
I read that molten bisulfate should also dissolve CeO2.
|
|
|
vano
National Hazard
Posts: 661
Registered: 22-3-2019
Location: Georgia
Member Is Offline
|
|
woelen i don't know to tell you truth. When i try i will write here.
Bedlasky i know how useful it is, but have a lot and i also want other cerium compounds for example tetravalent sulfate. Exept that i love when i have
new reagent.
|
|
|
Lion850
National Hazard
Posts: 514
Registered: 7-10-2019
Location: Australia
Member Is Offline
Mood: Great
|
|
Hi Woelen did you try hot concentrated sulphuric acid?
See my post
http://www.sciencemadness.org/talk/viewthread.php?tid=155085...
|
|
|
woelen
Super Administrator
Posts: 7976
Registered: 20-8-2005
Location: Netherlands
Member Is Offline
Mood: interested
|
|
I tried boiling HCl (30%), boiling H2SO4 (40% or so).
I did not try the really hot things like near boiling hot concentrated H2SO4 or molten NaHSO4 (the hydrate "melts" at 58 C, but that is no real
melting, it just is losing water of crystallization and then dissolving in its own lost water of crystallization, real melting occurs well over 300
C).
I might try the hot H2SO4-route. The molten NaHSO4 seems too dangerous to me with glassware, and when using other materials, then you get a
contaminated product (the cerium(IV) is strongly oxidizing and most likely will oxidize many metals).
|
|
|
![[*]](images/xpblue/default_icon.gif){kind=icon}
