Process for the preparation of aromatic aminosulphonic acids

Details Process for the preparation of aromatic aminosulphonic acids Process for the preparation of aromatic aminosulphonic acids

C - Chemistry, Metallurgy

07

C

260/236.32, 260/

C07C 309/46 (2006.01)

Patent

CA 1178955

A b s t r a c t Aminoarylsulphonic acids which have a relatively high purity and a relatively low content of aminoaryldisul- phonic acids can be obtained, if they are prepared, from the corresponding arylammonium hydrogen sulphates, by an improved version of the so-called baking process, wherein the reaction is carried out under pressure at a tempera- ture of at least 140°C and, at least partially, in the presence of water.

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