[org chem] Below room temperature soxhlet extraction?
If I set up a soxhlet extractor in the usual way, but instead of using water for cooling I use anti-freeze at about -20°C, will this allow the use of butane (B.P. = 0.5°C) as a solvent?
I plan to freeze an anti-freeze/water mixture (which will have a higher M.P. than neat anti-freeze, about -20°C) in 1L plastic containers. I will then place these containers in an insulated picnic box, cover with neat anti-freeze and circulate this through the condenser using a small fountain pump. The coolant should be maintained at the M.P. of the mixture as long as any solid remains unmelted.
Will this work? Or should I just use a solvent with a higher B.P.? If so, what else is a good, very non-polar, low B.P. solvent?
It sounds as if it will work, but it's an awful lot of bother. Is there any reason why you couldn't just use a longer chain hydrocarbon as a solvent, like hexane (bp 69 deg C)?
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