Process for the preparation of aminoarylsulphonic acids in sulfo

Details Process for the preparation of aminoarylsulphonic acids in sulfo Process for the preparation of aminoarylsulphonic acids in sulfo

1982-03-31

1984-05-08

Chan, Nicky

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260509, 260510, 260507R, 260396R, 546192, 546203, 546204, 546205, 546206, 546229, 546232, 546235, 546236, 546238, 548529, 548565, 548577, C07C14356, C07C14364

Patent

active

044473680

ABSTRACT:
Aromatic aminosulphonic acids which have a reduced content of discoloring by-products are obtained when aromatic amines are reacted with a sulphonating agent in a reaction medium at least some of which consists of tetramethylene sulphone.

REFERENCES:
patent: 3957860 (1976-05-01), Lenoir
Skrowaczeska, Chem. Astr., 48, 7568i-7569i (1954).
Chemical Abstracts, Jul. 12, 1976, vol. 85, No. 2, p. 95, Columbus, Ohio USA, T. Hayashi et al., Abstract No. 7242u-T. Hayashi et al., "Catalytic Actions of Mercury (II) Sulfate and Palladium (II) Sulfate for the Sulfonation of . . . ".

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