In an effort to help you (and answer a lingering question of mine), perhaps someone could explain what is the disadvantage of the following process to re-use the same ethanol to extract for many trim runs. The following example would use 1 gallon of solvent 10 times instead of 10 gallons once:
1.) Chill 2x 1/2 gallon of ethanol using dry ice
2.) Perform QWET on trim
3.) Filter ethanol
4.) Re-chill filtered ethanol
5.) Repeat process until all trim has been processed
6.) Perform distillation and purge
This process would obviously take more time to rechill and filter, but that time would more than be made up by a much faster distillation. If the ethanol is cold enough each time, would the only effect be possible reduced yield? A few percent would not be the end of the world if it reduces process time and solvent cost.
1.) Chill 2x 1/2 gallon of ethanol using dry ice
2.) Perform QWET on trim
3.) Filter ethanol
4.) Re-chill filtered ethanol
5.) Repeat process until all trim has been processed
6.) Perform distillation and purge
This process would obviously take more time to rechill and filter, but that time would more than be made up by a much faster distillation. If the ethanol is cold enough each time, would the only effect be possible reduced yield? A few percent would not be the end of the world if it reduces process time and solvent cost.