Anthracene production from phenanthrene

Details Anthracene production from phenanthrene Anthracene production from phenanthrene

1980-12-18

1983-05-17

Hines, Robert V.

Chemistry of hydrocarbon compounds

Plural serial diverse syntheses

To produce aromatic

C07C 100, C07C 200, C07C 400

Patent

active

043841520

ABSTRACT:
A method for production of anthracene from phenanthrene is disclosed. Phenanthrene is hydrogenated at a nickel on a carrier catalyst at temperatures from about 140.degree. C. to 170.degree. C. under a pressure of from about 10 to 30 bar by gradual addition of hydrogen. The hydrogenation product is separated by distillation into sym.-octahydrophenanthrene and asym.-octahydrophenanthrene. The sym.-octahydrophenanthrene is isomerized in the presence of methylene chloride as a solvent and of aluminum chloride as a catalyst at a temperature from about -30.degree. to +5.degree. C. to sym.-octahydroanthracene. The sym.-octahydroanthracene is dehydrogenated at a chromium oxide-aluminum oxide catalyst at temperatures from about 450.degree. to 550.degree. C. to anthracene.
The resulting anthracene is obtained with high yield and is very pure after a single recrystallization step.

REFERENCES:
patent: 3389188 (1968-06-01), Michalowicz
Olah, "Friedel-Crafts and Related Reactions," vol. 1, pp. 298-299 (1963).

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