The Constituents of Lignite Tars(II)

Comparative Studies of Several Lignite Tars

Abstract

Various lignite tars A, B, C, D, from woody lignite and E from coaly lignite were investigated.Among these, tar B was obtained by the carbonisation using superheated steam.
Comparative studies were carried out on the determination of water, the frac-tional distillation, the treatments by alkali and acid, the determination of methoxyl group of the phenols boiling at .195°C and 235°C (guajacol and creosol), and the estimation of paraffin wax, etc.
It was found that lignite tars were rich in phenols, especially in low boiling frac-tion, and generally contained methoxyl group, indicating the presence of phenols.having methoxyl group, such as guajacol and creosol, which was one characteristic feature of lignite-tar phenols.Lignite tars also contained considerable amounts of paraffin wax.