{HEAD ~ Any hydrocarbon or hydrocarbon mixture} with an appropriate freeze point can be used as {TAIL ~ a solvent} for the process 
used as
{ HEAD ~ Any hydrocarbon or hydrocarbon mixture } with an appropriate freeze point can be used as { TAIL ~ a solvent } for the process
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH