Process for the preparation of nitronaphthalene-sulphonic acids

Details Process for the preparation of nitronaphthalene-sulphonic acids Process for the preparation of nitronaphthalene-sulphonic acids

1981-05-20

1985-08-13

Siegel, Alan

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07C14324

Patent

active

045349053

ABSTRACT:
Improved process for the preparation of nitronaphthalene-sulphonic acids by reacting the corresponding naphthalene-sulphonic acids with nitric acid and working up the nitration mixture, characterized by the features that the reaction of the naphthalene-sulphonic acids with nitric acid is already interrupted before the nitration reaction has ended and that the nitration mixture is treated, optionally after dilution with water, with bases at a pH value of 5 to 14.

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