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[chemistry org] Below Soxhlet extraction temperature room?

If you created a Soxhlet extractor in the usual way, but in Instead of using water for cooling using coolant at about -20 ° C, are allowed to use butane (BP = 0.5 ° C) as a solvent? I plan to freeze a mixture anti-freeze/water (which have a higher MP to clean anti-freeze, about -20 ° C) in 1 liter plastic containers. Then place these containers in an insulated picnic box, covered with clear anti-freeze and circulate through the condenser using a small fountain pump. The refrigerant should remain on the MP of the mixture, provided that any solid remains unmelted. Will it work? Or should I use a solvent with a higher BP? If so, what else is a good, not very polar, low BP solvent?

It sounds like work but it is a lot of hassle. Is there any reason why he could not simply use a long-chain hydrocarbon solvent such as hexane (BP 69 degrees C)?

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