Method for the production of phenanthrenequinone

Details Method for the production of phenanthrenequinone Method for the production of phenanthrenequinone

1984-01-30

1985-04-09

Hollrah, Glennon H.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07C 5016

Patent

active

045100900

ABSTRACT:
Improvement of the yield and purity of phenanthrenequinone during its production by oxidation of phenanthrene by means of chromic acid in a sulfuric acidic medium is achieved by preparing a dispersion made up of phenanthrene, alkali dichromate and water at 95.degree.-100.degree. C., cooling said dispersion down to 80.degree.-85.degree. C. and carrying out the oxidation reaction under cooling and portion-wise addition of concentrated sulfuric acid in a temperature range between 80.degree. and 85.degree. C.

REFERENCES:
patent: 3243444 (1966-03-01), Sweeny, Jr.
patent: 3479374 (1969-11-01), Hargis et al.
Underwood and Kochmann, J. Am. Chem. Soc., vol. 46, pp. 2069-2071, 9/5/1924.
Oyster and Adkins, J. Am. Chem. Soc., vol. 43, pp. 208-212, 1921.
Wendland and LaLonde, Organic Synthesis, vol. 34, pp. 76-78, 1954.

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