Continuous azo coupling process

Details Continuous azo coupling process Continuous azo coupling process

1979-02-09

1981-02-24

Higel, Floyd D.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

210650, 260144, 260152, 260155, 260156, 260157, 260158, 260162, 260163, 260193, 260205, 260206, 2602071, 260208, C09B 3500, C09B 3526, C09B 3536, C09B 4100

Patent

active

042527180

ABSTRACT:
A process for the preparation of an aqueous slurry of a water-insoluble azo compound which comprises continuously mixing together, in a reaction zone from which the slurry is continuously removed, a first stream containing a diazonium compound resulting from the diazotization of a heterocyclic or weakly basic benzenoid amine in an acid medium, hereinafter referred to as the diazo component, and a second stream containing a compound capable of coupling with the diazo component under the conditions existing in the reaction zone to form a water-insoluble azo compound hereinafter referred to as the coupling component.

REFERENCES:
patent: 2478767 (1949-08-01), Locke
patent: 3423391 (1969-01-01), Windler et al.
patent: 3793305 (1974-02-01), Balon
patent: 4018751 (1977-04-01), Trecek
patent: 4159264 (1979-06-01), Hamilton et al.
Naraten, Chimia, vol. 15, pp. 156 et seq. (1961).

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