SOLUBILIZATION OF A BROWN-COAL IN A SOLVENT MIXTURE OF METHANOL AND ANONPOLAR SOLVENT AT ROOM-TEMPERATURE

A new method was developed for solubilizing a brown coal in a conventi onally used solvent at room temperature. The coal pretreated with hydr ogen peroxide in liquid phase at 60 degrees C for 2 h was extracted by solvent mixtures of methanol and a nonpolar solvent by the convention al method. In the solvent consisting of methanol and 1-methyl-naphthal ene (0.54:0.46 volumetric ratio), surprisingly, 84 wt% of the pretreat ed coal were extracted.