Some selected petroleum based feedstocks have been characterized by H-1 and
C-13 NMR spectroscopy for their possible use as carbon black feedstock (CB
FS). Feedstocks studied are pyrolysis tars, clarified oils, aromatic extrac
ts and vacuum residue. Analysis of average structural NMR parameters show t
hat pyrolysis tars because of their being highly aromatic in character (hig
h BMCI) are the most suitable feedstock for carbon black. Aromatic extracts
rank the next. Clarified oils of Indian refinery origin needs further proc
essing due to middle distillate mode refining severity.