Azo coupling in two-phase water-alcohol mixtures

Details Azo coupling in two-phase water-alcohol mixtures Azo coupling in two-phase water-alcohol mixtures

1978-05-08

1982-02-02

Higel, Floyd D.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260144, 260157, 260158, 260164, 260186, 260187, 260205, 260206, 260207, 2602071, 2602075, C09B 2901, C09B 2906, C09B 2924, C09B 2936

Patent

active

043138721

ABSTRACT:
Azo dyes are very simply made in high purity and very good yield by coupling a diazonium compound with a coupling compound in a mixture essentially of water with a simple alkanol having four to six carbons and soluble in water to the extent of not over about 15% by weight at 15.degree. C. This procedure is particularly effective with compounds that are ordinarily difficult to couple.

REFERENCES:
patent: 2496151 (1950-01-01), Dawson et al.
patent: 2824096 (1958-02-01), Heckert
patent: 3040019 (1962-06-01), Neier
patent: 3218309 (1965-11-01), Elslager et al.
patent: 3335168 (1967-08-01), Dehn et al.
patent: 3352845 (1967-11-01), Armento

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