REMOVAL OF ORGANIC SULFUR IN COAL BY THE USE OF ANHYDROUS HF AND SUPERACID HF BF3/

Anhydrous hydrogen fluoride (HF) and HF combined with a small amount o f boron trifluoride(BF3) desulphurized high-sulphur coal in the presen ce of hydrocarbons without H-2 in mild reaction conditions. HF removed mainly sulphidic and oxidized sulphur. HF/BF3 decreased thiophenic su lphur as well as sulphidic and oxidized sulphur although the extent of desulphurization was almost the same as that with HF alone.