Process for producing dibenzanthrone containing vat dyes

Details Process for producing dibenzanthrone containing vat dyes Process for producing dibenzanthrone containing vat dyes

1982-09-22

1984-07-31

Ramsuer, Robert W.

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

Organic compounds

Four or more ring nitrogens in the bicyclo ring system

544148, 546194, 546197, 546270, 549 60, 549348, C07D41312, C07D41314, C07D32110

Patent

active

044631740

ABSTRACT:
Blue vat dyes are obtained by reaction of dihydroxydibenzanthrone and an aldehyde in chlorosulfonic acid. These dyes can be optionally chlorinated and/or substituted by sulfonamido groups. They are suitable in particular for dyeing cellulose fibres.

REFERENCES:
patent: 2888463 (1959-05-01), Cohen

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