{HEAD ~ A method} of {TAIL ~ distillation} employing a heat pump using a vapor stream from within the distillation system as a heat source and a liquid stream from within the distillation system as a heat sink 
{ HEAD ~ A method } of { TAIL ~ distillation } employing a heat pump using a vapor stream from within the distillation system as a heat source and a liquid stream from within the distillation system as a heat sink
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