Production of sulfonated amines

Details Production of sulfonated amines Production of sulfonated amines

1986-04-09

1989-02-28

Chan, Nicky

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260509, C07D14358

Patent

active

048083429

ABSTRACT:
A process for the preparation of sulfonated aromatic amines is disclosed based upon starting with the corresponding amine reacted with sulfuric acid in the presence of a sufficient excess of sulfuric acid to act as the reaction solvent. The sulfuric acid excess in the case of sulfanilic acid, the most common of these sulfonated amines and exemplified herein is an aniline:sulfuric acid ratio in the range 1:2.0 to 1:2.5. The reaction, with recycling of the excess acid, provides substantially 100% yield of high quality sulfonated aromatic amine with effectively no effluent but the product.

REFERENCES:
Alexander, JACS, 69, 1599 (1947).
Tetrahedron Letters No. (43) pp. 4507-4510 (1968).
Collection Czechoslov. Chem. Commun. vol. 33, 2502-12 (1968).
Liebigs Annalen der Chemie 100, pp. 163-164 (1856).

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