Process for the preparation of 2-nitro-3, 6-dichlorophenol

Details Process for the preparation of 2-nitro-3, 6-dichlorophenol Process for the preparation of 2-nitro-3, 6-dichlorophenol

1993-03-16

1994-03-08

Lone, Werren B.

Organic compounds -- part of the class 532-570 series

Organic compounds

Oxygen containing

568713, C07C20526, C07C20520

Patent

active

052929663

ABSTRACT:
2-Nitro-3,6-dichlorophenol is prepared by sulfonation of 2,5-dichlorophenol and subsequent nitration and desulfonation, in which the nitration is carried out by metering in a nitrating acid composed of 98 to 100% strength nitric acid and 96 to 100% strength sulfuric acid at temperatures from -15.degree. to 35.degree. C. and a metering time of at least 1 hour.

REFERENCES:
patent: 3903178 (1975-09-01), Nakamura et al.
patent: 4038328 (1977-07-01), Pelster et al.
patent: 5012015 (1991-04-01), Terao et al.
patent: 5136109 (1992-08-01), Kimura et al.
Journal of the Chemical Society, Herbert Henry Hodgson and Arnold Kershaw, Dec. 1929, pp. 2917-2923.
Journal of Heterocyclic Chemistry, H. M. Grotta, T. F. Page, Jr., C. J. Riggle, and A. A. Manian, Dec. 1967, vol. 4, pp. 611-618.

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