Distill coal tar in a tube furnace to generate 3 mix oil , and obtain crude phenol from washed 3 mix oil .

煤焦油经管式炉蒸馏后，酚油，洗油和萘油馏分组成的三混馏分再经过洗涤后获得。

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Distill coal tar in a tube furnace to generate 3 mix oil , and obtain crude phenol from washed 3 mix oil .

煤焦油经管式炉蒸馏后，酚油，洗油和萘油馏分组成的三混馏分再经过洗涤后获得。

youdao