Process for preparing 4,4'-dinitrostilbene-2,2'-disulphonic acid

Details Process for preparing 4,4'-dinitrostilbene-2,2'-disulphonic acid Process for preparing 4,4'-dinitrostilbene-2,2'-disulphonic acid

1997-07-21

1998-09-15

Lambkin, Deborah C.

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

Organic compounds

Sulfonic acids or salts thereof

C07F 1100, C07G 1700

Patent

active

058081410

ABSTRACT:
The new process for preparing 4,4'-dinitrostilbene-2,2'-disulphonic acid and salts thereof by oxidation of 4-nitrotoluene-2-sulphonic acid with an oxidant in the presence of strong bases is characterized in that the oxidation is carried out in a mixture of water and an organic solvent selected from the group consisting of alcohols, ethers and mixtures thereof.

REFERENCES:
patent: 4719051 (1988-01-01), Guglielmetti
patent: 4952725 (1990-08-01), Lund et al.
patent: 5041632 (1991-08-01), Guglielmetti

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