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