Process for preparing an aqueous disazo dye concentrate

Details Process for preparing an aqueous disazo dye concentrate Process for preparing an aqueous disazo dye concentrate

1973-08-17

1978-04-04

Warren, Charles F.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260558D, C09B 3108

Patent

active

040827429

ABSTRACT:
Disclosed herein is a process for preparing an aqueous concentrate of a disazo dye comprising reacting an aminonaphthalene compound with benzoyl chloride in the presence of certain tertiary amines to form a benzamide which is coupled to the diazonium salt of p-(p-aminophenylazo)benzene sodium sulfonate, said diazonium salt having been isolated, prior to the coupling reaction, from the reaction mass in which it was produced.

REFERENCES:
patent: 3459730 (1969-08-01), Schnabel et al.
patent: 3562249 (1971-02-01), Schnabel et al.

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