Wait r u trying to say I am supposed to use iso-butane, not regular butane?
Well, I just got back from the field were I had attempted to do the extraction. It didn't work. The first foot of metal pipe frosted over, but not the second foot. This is where I feel my problem is. I pumped in 120 g of BUTANE, but the bottom half never got cold enough to keep the butane liquid. Damn, it is going to take a long fucking time to procesess all my herb if I have to do it in batches that fit in a 1 in. diameter by 1 ft. pipe. Methyl man, you said that maybe I should use a wider pipe. Do you think my problem is what I think it is, because if it were so, then I would think widening the pipe would cause the same problem as having it be too long?