Preferably {HEAD ~ the apparatus} of {TAIL ~ the invention} is for removing impurities which have a relative volatility between that of EO and water 
of
Preferably { HEAD ~ the apparatus } of { TAIL ~ the invention } is for removing impurities which have a relative volatility between that of EO and water
OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH