Process 4, comprising {HEAD ~ a subsequent step} of condensing {TAIL ~ the n pentane stripping agent} 
of condensing
Process 4 , comprising { HEAD ~ a subsequent step } of condensing { TAIL ~ the n pentane stripping agent }
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL