Schaeffer salt purification

Details Schaeffer salt purification Schaeffer salt purification

1975-02-28

1976-11-30

Helfin, Bernard

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07C14342

Patent

active

039949630

ABSTRACT:
A process for recovering purified Schaeffer's Salt from a sulfonation mixture is disclosed wherein unreacted 2-naphthol is removed by activated carbon treatment, 6,6'-oxybis(2-naphthalene sulfonic acid) is selectively removed as the disodium salt at a pH above about 9, and Schaeffer's salt is then salted out at a pH in the range of 2-7.

REFERENCES:
patent: 1494096 (1924-05-01), Berlin et al.
patent: 1880442 (1932-10-01), Helfaer
patent: 3875216 (1975-04-01), Feldman et al.

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