Process for the preparation of 6-chloro-2,4-dinitroaniline

Details Process for the preparation of 6-chloro-2,4-dinitroaniline Process for the preparation of 6-chloro-2,4-dinitroaniline

1985-02-27

1986-09-23

Warren, Charles F.

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

Organic compounds

Amino nitrogen containing

564441, 260694, 570207, 570209, C07C 8524

Patent

active

046136983

ABSTRACT:
Process for the preparation of 6-chloro-2,4-dinitroaniline by chlorination of 2,4-dinitroaniline with sodium hypochlorite in water using acid, which comprises carrying out the chlorination in the presence of a mineral acid or strong organic acid at a pH value .ltoreq.0 and in the presence of a dispersing agent at temperatures of about 40.degree. to 50.degree. C. and, when the chlorination has ended, either (a) filtering the resulting acid aqueous dispersion hot and washing the filtered reaction product with hot aqueous alkali solution, or (b) initially rendering the resulting acid aqueous dispersion alkaline with aqueous alkali solution and then filtering the mixture hot and subsequently washing the filtered reaction product with hot dilute mineral acid.

REFERENCES:
Seyewetz, A. & Chaix, E. "Sur l'Oxydation a Froid des Matieres Colorantes en Milieu Acide, en Vue de Leur Decoloration par l'Hypochlorite de Soude" Bull. de la Societe Chimique de France, Series 4, vol. 41 (1927) pp. 196-205.

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