Process for the preparation of metal complex dyes
AssigneeCiba-Geigy Corporation
InventorsWilhelm Schmidt, Gerhard Beck
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Abstract
The invention relates to a process for the preparation of a metal complex dye under production conditions, which comprises reacting at least one dye with a metal donor, adding said metal donor or said dye discontinuously before the end point of the metallizing is reached, and determining the end of the metallizing voltametrically. The process makes it possible to prepare metal complex dyes in good yield and purity.
Claims13
A process for the preparation of a metal complex dye under production conditions, which comprises reacting at least one dye with a metal donor, adding said metal donor or said dye discontinuously before the end point of the metallising is reached, and determining the end of the metallising voltametrically.
Dependencies are inferred from the claim text.