A continuous process for the dinitration of aromatic substrates

Details A continuous process for the dinitration of aromatic substrates A continuous process for the dinitration of aromatic substrates

C - Chemistry, Metallurgy

07

C

C07C 211/52 (2006.01) C07C 201/08 (2006.01) C07C 205/23 (2006.01) C07C 209/76 (2006.01)

Patent

CA 2221811

A continuous process for the dinitration of alkyl-substituted derivatives of phenol and aniline, using nitric acid substantially free of sulphuric acid, characterised in that the dinitration is conducted in a single step in a tubular reactor in the presence of a catalytically-effective quantity of a catalyst capable of reacting with the nitric acid to form nitrous acid in situ.

Processus continu pour la dinitration de dérivés du phénol et de l'aniline substitués par un alkyle, à l'aide d'acide nitrique essentiellement exempt d'acide sulfurique. Le processus se distingue par le fait que la dinitration s'opère en une seule étape dans un réacteur tubulaire en présence d'une quantité d'un catalyseur suffisante pour être efficace, le catalyseur pouvant réagir avec l'acide nitrique pour former de l'acide nitreux sur place.

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