Catalytic carbonization of aromatic hydrocarbons—VII: Carbonization mechanism of heterocyclic nitrogen compounds catalyzed by aluminum chloride

✍ Scribed by Isao Mochida; Takashi Ando; Keiko Maeda; Kenjiro Takeshita

• Publisher: Elsevier Science
• Year: 1978
• Tongue: English
• Weight: 623 KB
• Volume: 16
• Category: Article
• ISSN: 0008-6223
• DOI: 10.1016/0008-6223(78)90092-1

✦ Synopsis

The aluminum chloride catalyzed carbonization of heterocyclic nitrogen compounds such as carbazole, phenazine, and acridine was studied from the viewpoint of the kinetics and the structure of intermediates, in order to elucidate how the similar nitrogen compounds were carbonized to cokes of different optical features. The elimination of nitrogen, and evolution of methane and hydrogen were very similar in all the carbonization processes; however, the fusion ranges during carbonization differed very much from compound to compound. The fusing ranges are correlated to the structure of the soluble intermediates, which were investigated by means of NMR. The naphthenic hydrogens, which are assumed to be formed by the catalytic condensation of aromatic rings without dehydrogenation, may help the carbonizing system maintain a liquid phase of low viscosity, leading to the formation of a needle coke.