Process for preparing onium salts

Details Process for preparing onium salts Process for preparing onium salts

2011-01-04

2011-01-04

Shiao, Rei-tsang (Department: 1628)

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C568S009000, C568S077000, C564S282000, C564S296000

Reexamination Certificate

active

07863459

ABSTRACT:
An 'onium salt, e.g. a quaternary ammonium salt, of an anionic dye may be prepared by mixing an aqueous solution of a salt of the dye with a solution of a water-insoluble 'onium salt in an organic solvent, and separating a solution of the 'onium salt of the anionic dye in the organic solvent from the residual aqueous solution.

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