Typically, {TAIL ~ the molar ratio} of alkene to {HEAD ~ feed material} is less than about 3.0/1.0, preferably less than about 2.0/1.0 
Typically , { TAIL ~ the molar ratio } of alkene to { HEAD ~ feed material } is less than about 3.0/1.0 , preferably less than about 2.0/1.0
OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH