Process for the preparation of 1-amino-8-naphthol-4,6-disulphoni

Details Process for the preparation of 1-amino-8-naphthol-4,6-disulphoni Process for the preparation of 1-amino-8-naphthol-4,6-disulphoni

1980-10-08

1986-09-02

Siegel, Alan

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07C14364

Patent

active

046095039

ABSTRACT:
The invention relates to a process for the preparation of 1-amino-8-naphthol-4,6-disulphonic acid (K-acid) as the mono-alkali metal salt by reacting a mixture of naphthylaminetrisulphonic acids and/or salts thereof with an alkali metal salt solution and separating the K-acid as the mono-alkali metal salt, by acidification and crystallization. The product is a known valuable dyestuff intermediate.

REFERENCES:
patent: 4111979 (1978-09-01), Kotera et al.
patent: 4166826 (1979-09-01), Schossler et al.

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