Process for the manufacture of 4-nitro-4'-amino-diphenylamine-2-

Details Process for the manufacture of 4-nitro-4'-amino-diphenylamine-2- Process for the manufacture of 4-nitro-4'-amino-diphenylamine-2-

1979-10-11

1981-03-03

Chan, Nicky

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07C14356

Patent

active

042540542

ABSTRACT:
4-Nitro-4'-amino-diphenylamine-2-sulfonic acid, 2-nitro-4'-amino-diphenylamine-4-sulfonic acid and their sodium salts are obtained in good yield and high purity by condensing 6- or 4-chloro-3-nitro-benzene sulfonic acid and 1,4-phenylene diamine in a saturated aqueous sodium chloride solution. The products and their desulfonation derivatives are dye precursors.

REFERENCES:
patent: 536431 (1895-01-01), Kahn et al.
patent: 647237 (1900-01-01), Schmidt
patent: 800735 (1905-01-01), Geldermann
patent: 2022889 (1935-01-01), Lauer et al.

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