Chemical Structure of Heavy Oils Derived from Coal Hydrogenation Determined by Mass Spectroscopy

An integrated separation scheme for coal-derived liquids using ion-exchange and adsorption chromatography

“…A number of schemes (1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18)(19)(20) for the chromatographic separation of coal-derived liquids (CDL) have been proposed. The methods can be assigned broadly to two categories: (1) those that opt for rapidity of analysis and (2) those for detailed compound class separations.…”

“…The methods can be assigned broadly to two categories: (1) those that opt for rapidity of analysis and (2) those for detailed compound class separations. The former usually use either or adsorption chromatography (3)(4)(5)(6)(7)(8)(9)(10)(11)(12) and the latter ion-exchange chromatography (1,2,13), with or without more extensive adsorption chromatography (3)(4)(5)(6)(7)(8)(9)(10)(11)(12). The selection of a particular procedure is, therefore, a function of the type and nature of the information sought.…”