One-step preparation of 4, 6-dinitroresorcinol from resorcinol

Details One-step preparation of 4, 6-dinitroresorcinol from resorcinol One-step preparation of 4, 6-dinitroresorcinol from resorcinol

C - Chemistry, Metallurgy

07

C

C07C 205/23 (2006.01) C07C 201/08 (2006.01)

Patent

CA 2184486

4,6-Dinitroresorcinol prepared by reacting resorcinol with concentrated nitric acid that is substantially free of suboxides of nitric acid. It has been found that greater than 60 percent yields of the desired product can be obtained when the concentration of aqueous nitric acid used is between 80 and 93 weight percent, and the concentration of suboxides is less than 2 weight percent based on the weight of nitric acid.

Selon la présente invention, le 4,6-dinitrorésorcinol s'obtient par réaction du résorcinol sur de l'acide nitrique concentré. Il a été constaté qu'un rendement supérieur à 60 % de produit voulu peut être atteint pour une concentration pondérale d'acide nitrique se situant entre 80 % et 93 %, et pour une concentration pondérale en sous-oxydes inférieure à 2 % par rapport à l'acide nitrique.

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