Carbazole, a kind of nitro heterocyclic compound, was the main constituted part of the coal tar fraction.There was about 15% of the carbazoles contained in the high temperature coal tar.
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- 摘要咔唑是一种含氮的杂环化合物,是煤焦油馏分中重要的组成部分,高温煤焦油内约含咔唑1.;5%25。