Preparation of DI- or triarylmethane dyes by oxidation

Details Preparation of DI- or triarylmethane dyes by oxidation Preparation of DI- or triarylmethane dyes by oxidation

1993-03-29

1994-09-13

Siegel, Alan

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

Organic compounds

Acyclic carbon bonded directly to three benzene rings or to...

552114, 552110, 552108, 564330, C09B 1110

Patent

active

053470222

ABSTRACT:
A process for preparing di- or triarylmethane dyes by oxidation of di- or triarylmethanes in the presence of a diluent and of an oxygen transfer catalyst that contains a complexed heavy metal ion or of a catalyst based on molybdenic acid and vanadium compounds comprises using as oxidizing agent peroxomonosulfuric acid or a salt thereof.

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