抄録
Six coals including brown coals and subbituminous coals were hydro-genated with solvent of tetralin and without catalyst, at 450°C of temperature and under 200kg/cm2 of hydrogen pressure. The middle distillate fraction of b. p.from 180 to 415°C obtained from coal liquid was analysed by gas chromatograph equipped with fused-silica capillary column. GC-MS and standard reagents obtained by alkylation of poly-condensed aromatics were also used to assign the chromatogram.
The analytical system consists of Hewlett-Packard 5880 gas chromatograph with a SP-2100 capillary column (50mm×0.2mm) and a Hewlett-Packard 5992 mass spectro-meter. The middle distillate was separated and analysed at one time according to the three step-temperature raising program (35°, 25min; 5°/min; 100°, 5min; 3°/min; 150°, 3min; 2.5°/min; 260°, 50min).
About 1/2 of middle distillate without tetralin and naphthalene were straight paraffins and naphthalenes with methyl groups were the secondary main product. Very small amount of poly-condenced aromatic compounds such as acenaphthene, fluorene, phenanthrene, pyrene and fluoranthene, they are main components of coal tar, were found and many types of methylated compounds of these aromatics were assigned in the distillate produced from coal.
