Process for the isolation of 2-naphthylamine-1,5-disulphonic aci

Details Process for the isolation of 2-naphthylamine-1,5-disulphonic aci Process for the isolation of 2-naphthylamine-1,5-disulphonic aci

1992-09-02

1993-09-28

Cintins, Marianne M.

Organic compounds -- part of the class 532-570 series

Organic compounds

Sulfonic acids or salts thereof

562 68, 562 72, C07C30302, C07C30322

Patent

active

052488128

ABSTRACT:
When 2-naphthylamine-1,5-disulphonic acid is precipitated from the as-sulphonated reaction mixtures by dilution, a purer product is obtained, with a low level of adherent sulphuric acid, if the precipitation by dilution of the reaction mixture is carried out under precisely defined conditions.

REFERENCES:
patent: 4348336 (1982-09-01), Blank et al.
patent: 4407762 (1983-10-01), Blank et al.
patent: 4551283 (1985-11-01), Blattner

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