Process for the preparation of highly concentrated solutions of

Details Process for the preparation of highly concentrated solutions of Process for the preparation of highly concentrated solutions of

1992-05-14

1994-02-08

Lee, Mary C.

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

Organic compounds

Azo

534589, 534604, 534605, 534606, 534610, 534615, 8527, C09B 4100, C09B 6734

Patent

active

052849392

ABSTRACT:
There is described a process for the preparation of highly concentrated aqueous solutions of specific cationic azo dyes. The solutions are prepared by diazotising a diazo component in a solution which contains sulfuric acid, coupling the diazotised component to a coupling component, treating the resultant azo dye with a bicarbonate, and converting the dye bicarbonate with an organic acid into the dye salt of said acid.

REFERENCES:
patent: 3658781 (1972-04-01), Hegar
patent: 3726852 (1973-04-01), Calla et al.
patent: 4057388 (1977-11-01), Defago et al.
patent: 4264496 (1981-04-01), Durant
patent: 4432899 (1984-02-01), Linhart et al.
patent: 4468349 (1984-08-01), Linhart et al.
Wroblewski et al, Chemical Abstracts 98: 145027X(1983).

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