Hydrogenation of coal tar; Type 2 reprocessed coal tar, with a initial boiling point of 200 and a final boiling point of 365. However, it is red in color – why is that?

2018-02-25View Original

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Hydrogenation of coal tar; Type 2 reprocessed coal tar, with a initial boiling point of 200 and a final boiling point of 365. However, it is red in color – why is that?

Reply #22018-02-26

Is the color of oil related to its boiling range? It is recommended that you consider the color issue in terms of your oil composition, the degree of hydrogenation, and the absorption spectrum of the products after hydrogenation.

Reply #32018-02-26

If the influence of impurities can be ruled out, it is recommended to consider the degree of hydrogenation and composition.

Reply #42018-02-27

Incomplete hydrogenation and the presence of impurities; consult the catalyst manufacturer

Reply #52018-03-02

Biphenyl is also a possibility. . Is the reaction temperature too high?

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