Process for the preparation of anthraquinone

Details Process for the preparation of anthraquinone Process for the preparation of anthraquinone

1986-07-08

1987-05-19

Hollrah, Glennon H.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

502162, 502168, 502208, 502508, 502102, C07C 5018, B01J 3136, B01J 3138

Patent

active

046666320

ABSTRACT:
Anthraquinone is produced by reacting phthalic anhydride with benzene in the liquid phase over a super acid catalyst which may be an oxide of the Group 4b metals zirconium, hafnium, and titanium, or the Group 5b metals niobium, tantalum, and vanadium, preferably zirconium oxide, such oxides being treated with sulfuric acid and calcined. The process may also be applied to substituted equivalents, such as methyl phthalic anhydride and toluene.

REFERENCES:
patent: 2401225 (1946-05-01), Caesar et al.
patent: 4036860 (1977-07-01), Engelbach et al.
patent: 4045456 (1977-08-01), Merger et al.
patent: 4379092 (1983-04-01), Devic
patent: 4459234 (1984-07-01), Kawamata et al.
Kirk-Othmer, Encyclopedia of Chemical Technology, 1978, 3rd ed., vol. 2, pp. 702-707.
Hino, J. Chem. Soc., Chem. Commun., 1985, p. 112.

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