Hydrogen bonding in asphaltenes and coal. Short interim annual report (annual summary)

Abstract

SRC I is from Kentucky bituminous coal obtained from the Tacoma Pilot Plant. Elemental analysis: hydrogen, 6.1%; carbon, 85.5%; nitrogen, 2.0%; sulfur, 0.7%. SRC II is a liquid product with initial boiling point 180/sup 0/C, extending into end boiling point of 392/sup 0/C. Elemental analysis for SRC II: hydrogen, 8.7%; carbon, 89.0%; nitrogen, 0.8%; sulfur, 0.3%; oxygen, 1.2%. The liquid product has a flash point of 80/sup 0/C and 26.7 ml. coal tar acids/100 g. A mixture of 30% SRC I and 70% SRC II (by weight) was prepared by heating at 140 to 150/sup 0/C for 2.5 hours (nitrogen atmosphere). Yield of the liquid product was 95.8%. Viscosity of the mixture, determined at 60/sup 0/C, is 36.0 cp. Gel permeation chromatograms of the unfractionated mixture, preasphaltene, asphaltene, and heavy oil fractions have been obtained, and the preasphaltene fraction is shown to be composed of larger molecules than the other fractions. By using a preparative liquid chromatograph-Waters LC/System 500, we have separated SRC II into the following hydrocarbon types: saturates, aromatics, non-basic heterocyclics, monophenols, polyphenols, basic heterocyclics and high molecular-weight highly functional compounds.