shaheerniazi
Hazard to Self
Posts: 70
Registered: 25-11-2013
Location: Pakistan
Member Is Offline
Mood: radioactive
|
|
reduction of manganese dioxide with aluminium
I want to know that if I melt aluminium powder and sprinkle Manganese dioxide on it will the thermite reaction take place and give me these results:
MnO2 + Al -----> Mn + Al2O3 ?
|
|
|
elementcollector1
International Hazard
Posts: 2684
Registered: 28-12-2011
Location: The Known Universe
Member Is Offline
Mood: Molten
|
|
1) Could just melt any old source of aluminum, really. Powder might just burn in air anyway.
2) Yes, it would. However, due to the temperature of the reaction (thermites are very hot) and the boiling point of manganese metal, your Mn will boil
long before you get any yield. Thus, you need something inert to lower the reaction temperature - CaF2 is a good start.
See http://developing-your-web-presence.blogspot.com/2008/07/man... (written by blogfast25!) for more information.
Elements Collected:52/87
Latest Acquired: Cl
Next in Line: Nd
|
|
|
shaheerniazi
Hazard to Self
Posts: 70
Registered: 25-11-2013
Location: Pakistan
Member Is Offline
Mood: radioactive
|
|
Though I even have some Mn2O3, and If I do the reaction in a hood then will the evaporated metal cool and solidify on it?
|
|
|
shaheerniazi
Hazard to Self
Posts: 70
Registered: 25-11-2013
Location: Pakistan
Member Is Offline
Mood: radioactive
|
|
Though what temp will be needed for the reaction with carbon and MnO2:
MnO2 + C -----> Mn + CO2
|
|
|
elementcollector1
International Hazard
Posts: 2684
Registered: 28-12-2011
Location: The Known Universe
Member Is Offline
Mood: Molten
|
|
A very high one, and the Mn is sure to boil off if you use carbon.
If you do the reaction with some structure over it (not a fume hood - how would this hold up to gaseous manganese?) You might get some metal. Keep in
mind that if molten manganese is reactive towards oxygen (which it very much is, more so than any of its periodic neighbors), gaseous manganese will
be doubly so. You would have to have a very low distance between your condensing surface and reaction, while still keeping it cool enough to allow the
manganese to condense in the first place (it will undoubtedly heat up from such an exothermic reaction).
Better to go with a powdered heat-sink - more yield, less complexity.
You have Mn2O3? Where did you get this? Is it pure?
Elements Collected:52/87
Latest Acquired: Cl
Next in Line: Nd
|
|
|
shaheerniazi
Hazard to Self
Posts: 70
Registered: 25-11-2013
Location: Pakistan
Member Is Offline
Mood: radioactive
|
|
http://www.sciencemadness.org/talk/viewthread.php?tid=27603
|
|
|
![[*]](images/xpblue/default_icon.gif){kind=icon}
