Abstract
Naphthalene is formed at the same time as benzene in most pyrocondensations. It therefore also occurs abundantly in coal-tar, which constitutes the most important starting material for its production. Naphthalene-oil, a tar fraction boiling at 195-230°, is cooled and the crude naphthalene is crystallized. Oily impurities are removed by centrifuging or pressing, and the naphthalene is distilled. While in the molten state, it is treated successively with small quantities of concentrated sulphuric acid and caustic soda solution, and is finally further purified by distillation and sublimation.
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Reference
Carry, J. C. and Millar, I. T., J. them. Soc. 3144 (1959).
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© 1964 Springer-Verlag Berlin Heidelberg
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Clar, E. (1964). Hydrocarbons Containing up to Two Linearly Annellated Benzene Rings. In: Polycyclic Hydrocarbons. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-662-01665-7_21
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DOI: https://doi.org/10.1007/978-3-662-01665-7_21
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-662-01667-1
Online ISBN: 978-3-662-01665-7
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