Vat dyestuff prepared from crude anthraquinone mixtures

Details Vat dyestuff prepared from crude anthraquinone mixtures Vat dyestuff prepared from crude anthraquinone mixtures

1980-10-15

1983-09-20

Coughlan, Jr., Paul M.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C09B 540

Patent

active

044057857

ABSTRACT:
Useful vat dyestuffs can be prepared by reacting a mixture of aminoanthraquinones containing 65-80% 1-aminoanthraquinone and 20-35% of a mixture containing 2-aminoanthraquinone and 1,5- and 1,8-diaminoanthraquinones with, for example, a halogenated benzanthrone or anthraquinone. The mixture of aminoanthraquinones can be obtained by nitrating anthraquinone in sulfuric acid and thereafter reducing the resulting nitroanthraquinones.

REFERENCES:
patent: 1052507 (1913-02-01), Neresheimer
patent: 2456589 (1948-12-01), Lytle
patent: 3008962 (1961-11-01), Torre
patent: 3418321 (1968-12-01), Gordon et al.

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