COMPARISON OF OILS AND ASPHALTENES FROM EXTRACTION OF BITUMINOUS COALAND LIGNITE WITH HYDROGENATED ANTHRACENE OIL

The application of H-1 n.m.r. spectroscopy and g.c.-m.s. to the analys is of aromatic fractions obtained in the liquefaction of two coals of different rank is described. The conversion and the yield of asphalten es have been related to the proportion of aliphatic hydrogen in the ex traction oils after liquefaction. The n.m.r. bands for asphaltenes are similar to those of recovered anthracene oils, but mass spectra show that a substantial amount of high-molecular-weight compounds is produc ed during the extraction of a bituminous coal, compounds not encounter ed in lignite liquefaction.