Preparation of aminoazo dyes

Details Preparation of aminoazo dyes Preparation of aminoazo dyes

1994-05-20

1995-06-13

Lee, Mary C.

Organic compounds -- part of the class 532-570 series

Organic compounds

Azo

534593, 534845, 534851, C09B 4300

Patent

active

054244030

ABSTRACT:
Aminoazo dyes are prepared from the corresponding N-sulfomethylated aminoazo dyes by aqueous acid hydrolysis in the presence of amidosulfuric acid, urea or mixtures thereof.

REFERENCES:
patent: 1042198 (1912-10-01), Cantor
patent: 1483797 (1924-02-01), Green et al.
patent: 1483798 (1924-02-01), Green et al.
patent: 2088327 (1937-07-01), Knight
patent: 2112919 (1938-04-01), Mendoza et al.
Houben-Weyl, Methoden der Organischen Chemie, 4th edition, vol. 10/3, p. 242, 1965.
Colour Index, 3rd edition, vol. 4, C.I. Nos. 13010, 13130 and 13200, 1971.
Loeffler et al., Chemical Abstracts, 106:34619 (1986).
Arsac, Chemical Abstracts, 94:4948 (1980).

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