Process for the preparation of vat dyes from brominated dibenzan

Details Process for the preparation of vat dyes from brominated dibenzan Process for the preparation of vat dyes from brominated dibenzan

1986-12-15

1989-07-25

Hollrah, Glennon H.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260354, 260357, C09B 322

Patent

active

048511579

ABSTRACT:
There is disclosed a process for the preparation of vat dyes that dye cellulosic material in a grey or black shade of good fastness properties. The process comprises brominating dibenzanthrone and reacting the brominated reaction product with 1-aminoanthraquinone in a single step.

REFERENCES:
patent: 1003268 (1911-09-01), Just et al.
patent: 4547575 (1985-10-01), Tzikas
patent: 4659831 (1987-04-01), Dill
Gilbert, Sulfonation & Related Reactions, (1965).
Houben--Weyl-vol. 2, (1953), 41-43.

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