Process for the preparation of 4,4'-dinitrostilbene-...

Details Process for the preparation of 4,4'-dinitrostilbene-... Process for the preparation of 4,4'-dinitrostilbene-...

C - Chemistry, Metallurgy

09

B

260/503

C09B 23/10 (2006.01) B01J 23/34 (2006.01) B01J 27/00 (2006.01) B01J 31/04 (2006.01) B01J 31/22 (2006.01) C07C 15/52 (2006.01) C09B 23/14 (2006.01) C09B 31/047 (2006.01) C09B 57/00 (2006.01) D06L 3/12 (2006.01)

Patent

CA 1159082

Process for the preparation of 4,4'-dinitrostilbene-2,2'-disulfonic acid and its salts Abstract A process for the preparation of 4,4'-dinitro- stilbene-2,2'-disulfonic acid and its salts, of the formula Image in which M is hydrogen or an alkali metal cation, by oxidation of 4-nitrotoluene-2-sulfonic acid in organic solvents, and also the reduction of the resulting acid or salt, without isolation, to give 4,4'-diamino- or (4- amino-4'-nitro)-stilbene-2,2'-disulfonic acid or salts thereof.

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