New tank of EcoGreen butane still not clean after 7 CL cycles

hey everyone,

i have a new 25lb tank of n-butane from ecogreen that i bought a few months ago (was an orange tank)

i've ran my extractor 7 times, each time pulling ~6lb of butane. before that last cycle i cleaned the vessel, ran it again and still a bit of oil. what gives?

edit: should i get another recovery tank and boil off passively from one tank to another?

What temperature and pressure are your running your distillation at?

tank and coil in ice brine, vessel in 130f water. vessel sits at about 35psi

anybody?

You are running too hot. Pentane boils at 36.2C/97F.

http://www.sciencelab.com/msds.php?msdsId=9927384

Try isobutane. It's way cleaner, aka r-600a, dimethylpropane, or 75-28-5. It's far more expensive but if your reclaiming solvents, who cares about investments being recycled? I would also add hexane and ethanol to the mix, and perhaps a dab of chloroform to extract a higher percentage of thc.

All that backed up w co2 is how I really get down. Low temp and pressure is less yield, but spanks in potency. It's better than n-butane alone by far.

VlaDeMaN said:

tank and coil in ice brine, vessel in 130f water. vessel sits at about 35psi

Click to expand...

try 800-1200 psi for better results, and closer to 25C for potency, but for yield, gray wolf is right. 100C and 10,000 psi is yielding sick though.