My friend wants to make some blender hash but I've been wanting to try and make some blond hash for a while and I read a tutorial online that uses butane. My friend is a little wary about two things, he doesn't want to smoke butane, and he doesn't think it will extract the thc. I am asking A. will butane evaporate like alcohol if we let it sit out for a while, and will the leftover oil be safe to smoke, and B. will it even work? Is it efficient? Are we going to waste thc? are we even going to get any?Is it safe/effective to use butane for supercritical fluid extraction of cannabis oils?
The critical temperature of butane is 153C. You would have to heat the vapor at least that high. Also, you must compress the vapor to a few dozen atm to get a density of about 0.5g/mL. The extracted substance drops out of solution in the vapor when you release the pressure, so there is no need to ';evaporate'; the butane. It would be better to use supercritical CO2, because the critical temperature is only 31C.
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