Preparation of anthraquinoid disperse dyes

Details Preparation of anthraquinoid disperse dyes Preparation of anthraquinoid disperse dyes

1982-03-05

1985-01-01

Hollrah, Glennon H.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D20956, C09B 562

Patent

active

044916663

ABSTRACT:
An improvement in the process for the preparation of dispersed dyes of compounds of the formula ##STR1## where X is >O or >NH and R is C.sub.1 -C.sub.12 -alkyl, C.sub.2 -C.sub.6 -hydroxyalkyl, alkoxyalkyl of 3 to 12 carbon atoms in total, C.sub.5 -C.sub.8 -cycloalkyl, phenoxy-C.sub.2 - or-C.sub.3 -alkyl, phenyl-C.sub.1 -C.sub.4 -alkyl or phenyl-C.sub.1 -C.sub.4 -alkoxy-C.sub.2 - or -C.sub.3 -alkyl, by reacting a compound I where R is H with an amine of the formula R-NH.sub.2 in a liquid under the influence of heat, wherein the reaction is carried out in water, in the presence or absence of a cationic or non-ionic surfactant.
Very pure dyes are obtained with a high space/time yield.

REFERENCES:
patent: 3268552 (1966-08-01), Akamatsu et al.
patent: 3294815 (1966-12-01), Hartwig et al.
patent: 3668219 (1972-06-01), Otsuka et al.

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