Production of azo compounds

Details Production of azo compounds Production of azo compounds

1981-12-11

1985-01-29

Shaver, Paul F.

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

Organic compounds

Azo

C09B 2932

Patent

active

044964811

ABSTRACT:
A process for the production of an azo compound comprising contacting with agitation a solution or dispersion of a diazotizable amine, a solution or dispersion of a coupling component and an organic or inorganic nitrite compound, in a water insoluble liquid organic acid, adding to the reaction mixture so formed aqueous alkali to transfer the organic acid, as its soluble salt, into the aqueous phase and separating the azo compound from the liquors.
The azo compounds are produced in high yield and purity and are suitable for use as pigments and disperse dyes.

REFERENCES:
patent: 1462613 (1923-07-01), Murray
patent: 3678028 (1972-07-01), Blackwell et al.
patent: 3793305 (1974-02-01), Balon
patent: 3900459 (1975-08-01), Kawamura et al.
patent: 3928314 (1975-12-01), Rochat et al.
patent: 3941768 (1976-02-01), Stocker
patent: 4255375 (1981-03-01), Macpherson et al.
CA, 17, 3105, (1923).
CA, 85, 144699n, (1976).

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