For example, the mixture of propyne and propadiene may have been obtained from the bottom effluenet of a propane/propene splitter which contains {HEAD ~ significant amounts} of propane, propene, propyne and {TAIL ~ propadiene} 
For example , the mixture of propyne and propadiene may have been obtained from the bottom effluenet of a propane / propene splitter which contains { HEAD ~ significant amounts } of propane , propene , propyne and { TAIL ~ propadiene }
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 HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL