Coal liquefaction process using pretreatment with a binary solvent mixture

摘要

An improved process for thermal solvent refining or hydroliquefaction of non-anthracitic coal at elevated temperatures under hydrogen pressure in a hydrogen donor solvent comprises pretreating the coal with a binary mixture of an aromatic hydrocarbon and an aliphatic alcohol at a temperature below 300 DEG C. before the hydroliquefaction step. This treatment generally increases both conversion of coal and yields of oil.