Alternatively, the isotropic pitch product containing metals from {HEAD ~ either} of {TAIL ~ the foregoing methods} can be solvent fractionated at supercritical extraction conditions to produce a metals containing mesophase pitch 
Alternatively , the isotropic pitch product containing metals from { HEAD ~ either } of { TAIL ~ the foregoing methods } can be solvent fractionated at supercritical extraction conditions to produce a metals containing mesophase pitch
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH