Process for the preparation of metallizable azo dyes carrying ou

Details Process for the preparation of metallizable azo dyes carrying ou Process for the preparation of metallizable azo dyes carrying ou

1990-06-08

1991-02-19

Higel, Floyd D.

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

Organic compounds

Azo

534602, 534583, 534887, 534573, C09B 4100, C09B 4516, C09B 4520, C09B 6300

Patent

active

049945610

ABSTRACT:
A process for the preparation of an azo dye of formula ##STR1## wherein K is the .beta.-naphthol radical, X is hydrogen or nitro and M is an alkali metal ion or an ammonium ion, which process comprises coupling an aqueous solution containing 15 to 30 percent by weight of a diazo component of formula ##STR2## and 6 to 20 mol % of an ammonium salt, based on the molar amount of the diazo component, at a pH in the range from 10.5 to 11.5 and in an inert gas atmosphere, to a coupling component of formula ##STR3## in which formulae (2) and (3) above K and X are as defined for formula (1).
The present invention makes it possible to obtain the claimed azo dyes in high yield.

REFERENCES:
patent: 2812321 (1957-11-01), Eberhart et al.
Coloranti Azoici, Editura Technica Bucuresti (1981), 330-331.
Chem. Abstract 106:178104g (1987), Mitsui.

Affiliated with

Also associated with

Rating

Process for the preparation of metallizable azo dyes carrying ou does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for the preparation of metallizable azo dyes carrying ou, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for the preparation of metallizable azo dyes carrying ou will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1144784