FadeToBlackened
Harmless
Posts: 3
Registered: 11-5-2003
Member Is Offline
Mood: No Mood
|
|
reducing CaSO4 with C
I've read that this can be done by heating it, but how much heat does it take? Would charcoal + lots of air do it or would it take a high
current carbon-arc type setup?
|
|
|
madscientist
National Hazard
Posts: 962
Registered: 19-5-2002
Location: American Midwest
Member Is Offline
Mood: pyrophoric
|
|
I once attempted to reduce MgSO<sub>4</sub> with charcoal (both powders, intimately mixed) in a charcoal fire. Nothing much seemed to
happen.
[Edited on 18-5-2003 by madscientist]
I weep at the sight of flaming acetic anhydride.
|
|
|
Theoretic
National Hazard
Posts: 776
Registered: 17-6-2003
Location: London, the Land of Sun, Summer and Snow
Member Is Offline
Mood: eating the souls of dust mites
|
|
Thermite?
Theoretically, Al powder would react with CaSO4 quite exothermically. SO4-- is more oxidizing than S.
|
|
|
rikkitikkitavi
Hazard to Others
Posts: 192
Registered: 17-6-2002
Member Is Offline
Mood: No Mood
|
|
CaSO4 can be reduced with C , but it takes about 13-1400 C, wich is unobtainable in a simple charcoal fire, unless it is very large. Heat loss
compared to combustion rate is unfavourable in most fires that we can construct in the lab or in a garden.
An arc oven (with graphite electrodes ) would probably work.
/rickard
|
|
|
![[*]](images/xpblue/default_icon.gif){kind=icon}
