In processing natural gas for the removal of nitrogen, {HEAD ~ hydrocarbon recoveries} of {TAIL ~ greater than 99 mol %} are achieved 
In processing natural gas for the removal of nitrogen , { HEAD ~ hydrocarbon recoveries } of { TAIL ~ greater than 99 mol % } are achieved
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH