Preparation of 1:2 chromium complexes one sulfo substituted and

Details Preparation of 1:2 chromium complexes one sulfo substituted and Preparation of 1:2 chromium complexes one sulfo substituted and

1990-02-21

1993-07-20

Ramsuer, Robert W.

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

Organic compounds

Azo

534696, 534699, 534698, C09B 4506, C09B 4516

Patent

active

052295028

ABSTRACT:
A process is described for the preparation of pure, asymmetric 1:2 chromium complex dyes containing at least two groups which impart solubility in water, which process comprises reacting a mixture of two dyes of the formulae

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patent: 4058514 (1977-11-01), Uehlinger et al.
patent: 4933437 (1990-06-01), Iff et al.
patent: 4997917 (1991-03-01), Iff et al.

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