A process for preparing 'onium salts

Details A process for preparing 'onium salts A process for preparing 'onium salts

C - Chemistry, Metallurgy

09

B

C09B 67/00 (2006.01)

Patent

CA 2633567

An 'onium salt, e.g. a quaternary ammonium salt, of an anionic dye maybe 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.

La présente invention concerne un sel d'onium, par exemple un sel d'ammonium quaternaire, d'un colorant anionique qui peut être préparé en mélangeant une solution aqueuse d'un sel du colorant avec une solution d'un sel d'onium insoluble dans l'eau dans un solvant organique et en séparant de la solution aqueuse résiduelle la solution du sel d'onium du colorant anionique dans le solvant organique.

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