Continuous process for aminoazobenzene

Details Continuous process for aminoazobenzene Continuous process for aminoazobenzene

1975-04-09

1977-04-19

Higel, Floyd D.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260140P, 260144, C07C10706, C09B 2908

Patent

active

040187519

ABSTRACT:
An efficient, continuous process for the manufacture of aromatic aminoazo compounds from aromatic primary amines is provided which involves passing reactant streams comprising (a) the aromatic primary amine, mineral acid and water and (b) aqueous metal nitrite solution continuously through a tubular reactor and recovering the p-aminoazo compound from the exiting stream; the residence time in the reactor being less than about 10 minutes and the temperature within the reactor being between about 40.degree. C. and about 100.degree. C.

REFERENCES:
patent: 2538431 (1951-01-01), Shulman
patent: 2809964 (1957-10-01), Baggenstoss et al.
patent: 3423391 (1969-01-01), Kindler et al.
Kaeppler et al., Chemical Abstracts, vol. 76, No. 72205n, (1972).

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