High temperature process for preparing fiber reactive dyes

Details High temperature process for preparing fiber reactive dyes High temperature process for preparing fiber reactive dyes

1993-02-08

1994-09-27

Morris, Patricia L.

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

Organic compounds

Azo

534582, 534632, 534642, C09B 4100

Patent

active

053508386

ABSTRACT:
A process for preparing monoazo dyes by coupling a aromatic diazonium salt with an amino-4-hydroxy-naphthalene sulfonic acid derivative at a temperature of 40.degree.-85.degree. C. The process of the invention provides a isomerically purer dye.

REFERENCES:
patent: 4841031 (1989-06-01), Kayane et al.
patent: 4937326 (1990-06-01), Kayane et al.

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