Abstract
We have recently found that some bituminous coals can be extracted up to 75% in a flowing tetralin at 350℃ without appreciable decomposition. To extend this method for the practical application, several coals were extracted by coal derived oils, carbol oil and creosote oil, under 10MPa at 350℃. Almost all the bituminous coals and brown coals were surprisingly extracted by 80% in carbol oil at 350℃. The extract was recovered as a soluble fraction (soluble) at room temperature. The contents of ash and sulfur compounds in the soluble were measured to examine the possibility of deashing and desulfurization of coal by solvent extraction. This suggests the possibility of preparing clean fuel from coal in high yield.
