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Fractional Distillation


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Hey guys


I'm looking for a nice drawing of a lab device for fractional distillation at low pressure with reflux ratio. I just can't find anywhere a reflux associated to a fractional distillation. I've seen Perkin triangle but I don't know how it gives me reflux ratio.


Thank you!



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Yes I tried! But I could only find it now.


I think I can use a cold finger (see how it provokes the condensation of part of the vapor).




I mean, the usual fractional distillation (image below) wouldn't give me the reflux ratio I needed.



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