Process for the manufacture of aromatic sulfonic acid halides

Details Process for the manufacture of aromatic sulfonic acid halides Process for the manufacture of aromatic sulfonic acid halides

1974-02-20

1976-03-30

Sutto, Anton H.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07C14370

Patent

active

039475123

ABSTRACT:
An improved process for the manufacture of aromatic sulfonic acid halides from aromatic diazonium compounds, wherein aromatic diazonium compounds are reacted in a strongly hydrochloric or hydrobromic solution in the presence of copper or copper compounds with an alkali metal hydrogeno-sulfite, which avoids the use of liquid or gaseous sulfur dioxide and of organic solvents according to known processes which makes the process, if carried out on a technical scale, expensive and strongly contaminates the waste water.

REFERENCES:
patent: 3647873 (1972-03-01), Ziegler et al.

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