CARBONIZATION OF REDACTIVE ETHYLATION PRODUCT OF YUBARI COAL UNDER THE HIGH PRESSURE.

This report deals with the carbonization of the ethylated product of Japan's Yubari coal at 400 and 500 degree C, less than 20 and 1000 kg/Cm**2 of nitrogen for 5 h. , in order to obtain the needle-like coke. The temperature and pressure effects on the ethylated product were first investigated, then compared with those obtained with the natural coal. The microscopic observation of the carbonization products - under the normal pressure - from methylated- and ethylated products of Yubari and Taiheiyo coals showed that the mesophase was absent in them.