Separation and Characterization of Hydroxyl Aromatics in Oils and Asphaltenes from Nondistillable, Pyridine Soluble Coal-Liquids

摘要

Hydroxyl aromatics are an important class of compounds in coal liquefaction processes. The separation and characterization of hydroxyl aromatics are particularly important for the development of coal liquefaction processes and for an understanding of coal liquefaction chemistry. It has been shown that oils and asphaltenes in high-boiling distillates and nondistillable, pyridine soluble coal-liquid samples produced in an SRC-I process consist of the same major compound classes: hydrocarbons, nitrogen compounds, and hydroxyl aromatics. However, as reported by Boduszynski, et al. oils and asphaltenes differ in the concentrations of hydrocarbons, nitrogen compounds, and hydroxyl aromatics. In this work, hydroxyl aromatic fractions were isolated from oils and asphaltenes in nondistillable (> 427 exp 0 C) Wyodak and Kentucky pyridine soluble coal-liquid samples using procedures developed by Boduszynski, et al. (Boduszynski, M.M.; Hurtubise, R.J.; Silver, H.F. Anal. Chem. 1982, 54, 372 and Boduszynski, M.M.; Hurtubise, R.J.; Silver, H.F.; Anal. Chem. 1982, 54, 375). (ERA citation 10:041148)