Method of oxidizing hydrazo compounds to corresponding azo compo

Details Method of oxidizing hydrazo compounds to corresponding azo compo Method of oxidizing hydrazo compounds to corresponding azo compo

1986-03-04

1987-01-20

Warren, Charles F.

Chemistry: electrical and wave energy

Processes and products

Processes of treating materials by wave energy

534586, C07C10702

Patent

active

046378685

ABSTRACT:
This invention relates to a novel method of oxidizing hydrazo compounds to corresponding azo compounds, and more particularly 4,4'-hydrazo-bis-4-cyano-pentanoic acid to 4,4'-azo-bis-4-cyano-pentanoic acid at a temperature close to ambient temperature, said method comprising the step of effecting oxidation with the aid of hydrogen peroxide under the following conditions: catalysis of the reaction by means of UV radiation, operation in aqueous solution at a pH.ltoreq.0.5, said pH being obtained by addition of hydrochloric acid and/or hydrobromic acid, and operation in a reaction medium comprising Br.sup.- ions at a concentration at least equal to 30 ppm.

REFERENCES:
patent: 2469358 (1949-05-01), Alderson et al.
patent: 2586995 (1952-02-01), Robertson
patent: 4039527 (1977-08-01), Magaoka et al.
patent: 4094868 (1978-06-01), Chendalia et al.

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