Concentrate entering recovery tank

Arnold101

Arnold101

New Member
I've been running a closed loop system for almost 6 months now, my problem is or at least I think there is a problem with my butane refrigerant tank being contaminated with evaporating butane back into tank. My process is as follows:

Vac entire system to remove all air after packing 2" x 36" column with trim. I then put the base of the extractor into a 5 gallon bucket witch has 5 or so inches of dry ice in it. I then open valve on refrigerant tank to introduce butane to system. After all butane has left refrig tank I close valve on top and move my steel braided hose to the valve on the bottom tank of system. Now I place refrig tank in the dry ice and then place extractor base in warm to hot water in a 5 gallon bucket. What I've notice I there is some thc oil entering the refrig tank with butane, when it should remain in the bottom of extractor. Does anyone have a remedy for this issue?
 
heckler73

heckler73

Well-Known Member
Do you have pics of your coupling? Also, why should it stay in the bottom of the tank? If the column is "packed" and saturated, I would expect a relatively equal distribution throughout. Due to the length of the tube, sticking the "end" into a bucket is still leaving plenty (~30" ) exposed to ambient temperature. The solution in the upper half still has ability to migrate, and I presume there is compression/expansion happening at the valve, which would encourage agglomeration of residue (I'm pretty sure this is where enthalpy comes into the equation).

Have you looked into how CO2 is used? There is generally a second tank to collect the extract, thereby freeing up the volume of the rest of the tube for the evaporation part of the process without all of the source material in the way, acting as a wick.
 
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