Chemical Reactions of Coal Tar Pitch with Model Organic Compounds
E. I. ANDREIKOV1,2, YU. A. DIKOVINKINA1, M. G. PERVOVA1, O. V. KRASNIKOVA1
1Postovsky Institute of Organic Synthesis, Ural Branch of the Russian Academy of Sciences, Ekaterinburg, Russia
2JSC VUKhIN, Ekaterinburg, Russia
Keywords: каменноугольный пек, перенос водорода, поликонденсация, нитробензол, анилин, хлорфенолы, гидродехлорирование, coal tar pitch, hydrogen transfer, polycondensation, nitrobenzene, aniline, chlorophenols, hydrodechlorination
Pages: 556-560
Abstract
Thermal reactions proceeding through hydrogen transfer from the polyaromatic compounds of coal tar pitch to model organic compounds (nitrobenzene, chlorophenols, and chloraniline) are investigated. Within the temperature range 270-360 оC, there is a complete conversion of nitrobenzene into aniline (with a yield of 75-82 %) and condensation products remaining in the pitch. It was found that 4-chlorophenol enters hydrodechlorination starting at a temperature of 300 оC and leading to the formation of phenol and condensation products. The reactivity of 2,4-dichlorophenol and 2,4,6-trichlorophenol is higher than that of 4-chlorophenol. The features of the reactions are compared using coal tar pitch and hydroaromatic compounds as hydrogen donors.
DOI: 10.15372/CSD2019173
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