Preparation of concentrated solutions of cationic dyes as mono-c

Details Preparation of concentrated solutions of cationic dyes as mono-c Preparation of concentrated solutions of cationic dyes as mono-c

1989-09-12

1990-12-11

Clingman, A. Lionel

Bleaching and dyeing; fluid treatment and chemical modification

Dye concentrate composition wherein an additional amount of...

8538, 8594, 8654, 8657, 8659, 8609, 8610, 8611, 8927, C09B 6734, C09B 6906

Patent

active

049767445

ABSTRACT:
Concentrated solutions of cationic dyes are prepared by treating the cationic dyes, which contain as the counterions the anions customarily present during their preparation, with alkali metal salts of monocarboxylic acids and with or without complexing agents in an aqueous glycol ether medium, and separating off the organic phase, which contains the dyes in the form of their monocarboxylic acid salts.

REFERENCES:
patent: 4095943 (1978-06-01), Lang et al.
patent: 4245990 (1981-01-01), Loew et al.
patent: 4306875 (1981-12-01), De Feo et al.
patent: 4767421 (1988-08-01), Van der Veen et al.
K. Venkataraman, The Chemistry of Synthetic Dyes, vol. 4, Chap. 3 to 5, Academic Press, N.Y., 1971.

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