| 摘要 |
PURPOSE:To prepare a high-quality pitch having an excellent carbonizing property, with a good yield, by hydrogenating a tri-penta-cyclic aromatic compd., followed by oxidation. CONSTITUTION:A tri-penta-cyclic aromatic compd. or a mixt. of at least two of the compd. is lightly hydrogenated to such an extent that aliphatic hydrogen specified by (Halpha+Hbeta+Hgamma) (where Ha is 6-10ppm; Halpha is 1-2ppm; Hbeta is 2- 4ppm; Hgamma is 0.3-1.1ppm) may be 35-70% in proton NMR and no decomposition of raw material may take place. The hydrogenated raw material is then oxidized by air blowing until aliphatic hydrogen (Halpha+Hbeta+Hgamma) remaining in the resultant pitch may be in 15-35%.
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