Originally Posted by GQgeek
They actually use liquid CO2. And it's the other way around, CO2 works very well for nonpolar substances and is similar in effectiveness to hexane. Remember, it's nonpolar despite the two oxygens.
And regarding the OP, the biggest benefit of CO2 cleaning imo is the lack of heat in the process.
You're right, all right. I know that, too, dunno why I wrote it reversed -- chemical dyslexia. I considered using it once because of its selectivity and high diffusion coefficient. Needed to dissolve some paraffin and leave other stuff behind.
I think they mightn't use 'supercritical' as it sounds quite dangerous. Then you'd have hordes of people trying to close those explosive drycleaners.
Dihydrogen monoxide, anyone?