metricp
Harmless
Posts: 1
Registered: 25-3-2024
Member Is Offline
Mood: No Mood
|
|
Piranha solution regeneration
Hello, Has anyone here tried regenerating, recycling or re-using piranha solution before? We go through quite a lot to dissolve cyclized polyisoprene
films and I'm trying to find a way that we could filter/dispose the dissolved polymer and reuse the piranha solution. I imagine the hydrogen peroxide
will just degrade and we'd need to add more, but if we could recover at least the sulphuric acid, this would be very useful.
|
|
|
Sulaiman
International Hazard
Posts: 3677
Registered: 8-2-2015
Location: 3rd rock from the sun
Member Is Offline
|
|
I imagine that the polymer will be entirely converted to CO2 and H2O by the piranha solution,
so concentration to about 70% w/w sulphuric acid could be easily recovered by boiling off water,
above 70% there will be lots of acid fumes,
but you could continue boiling until 95 to 98%,
but, the catalyst byproducts will accumulate if the acid is not distilled - which is possibly an option.
Please note disclaimer below 
CAUTION : Hobby Chemist, not Professional or even Amateur
|
|
|
Deathunter88
National Hazard
Posts: 518
Registered: 20-2-2015
Location: Beijing, China
Member Is Offline
Mood: No Mood
|
|
Probably not worth the effort in an actual profession lab setting.
|
|
|
![[*]](images/xpblue/default_icon.gif){kind=icon}
