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Carbonization of aromatic hydrocarbons—IV: Reaction path of carbonization catalyzed by alkali metals

✍ Scribed by Isao Mochida; Ei-Ichi Nakamura; Keiko Maeda; Kenjiro Takeshita

Publisher
Elsevier Science
Year
1976
Tongue
English
Weight
802 KB
Volume
14
Category
Article
ISSN
0008-6223

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✦ Synopsis

Abstrad--The carbonization path of aromatic hydrocarbons catalyzed by alkali metals has been investigated to elucidate how aromatic hydrocarbons were converted into the isotropic coke, compared to the same reaction catalyzed by aluminum chloride which gave the anisotropic needle-like coke. Attempts were made to identify the intermediate products by means of elemental analyses, NMR, and mass spectroscopy, and the process was followed by the analysis of evolved gases. Effects of the catalyst migration at the intermediate step of carbonization on the properties of produced coke were also investigated to know when the destiny of the coke was determined. These results indicate that the isotropic nature of the coke obtained from the aromatic hydrocarbons with alkali metals is due to the extensive dehydrogenation of the intermediate at the early stage of carbonization at ca. 250°C. The dehydrogenation may raise the melting point of the carbonizing material. Other factors influencing the nature of the coke are considered to be unimportant in the present case.

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