{HEAD ~ A method} of distillation employing {TAIL ~ 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 
employing
{ HEAD ~ A method } of distillation employing { TAIL ~ 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 HEAD HEAD HEAD HEAD HEAD OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH