Abstract
One kilogram of SRC-II heavy distillate has been separated into nine fractions by preparative liquid chromatography. The fractions (strong, weak, and very weak bases; strong, weak, and very weak acids; neutral resins; and asphaltenes) have been characterized in detail by elemental analysis, /sup 1/H NMR at 80 and 600 MHz, /sup 13/C NMR, IR, mass spectrometry, vapor phase osmometry, and other techniques. The results have been used as a basis for postulating representative molecular structures of each fraction. The fractions are to be used individually in high-pressure microreactor studies of catalytic hydroprocessing.
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