Process for the purification of sulfonated aryl phosphines

Details Process for the purification of sulfonated aryl phosphines Process for the purification of sulfonated aryl phosphines

1985-08-27

1986-11-18

Siegel, Alan

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260505R, 260505N, C07C14324

Patent

active

046234900

ABSTRACT:
A process for the purification of salts of at least one member of the group consisting of diphenylphosphine-phenyl-m-sulfonic acid, phenylphosphine-di-(m-phenylsulfonic acid) and triphenylphosphine-tri-(m-sulfonic acid) from aqueous solutions thereof comprising adding at least a molar equivalent amount of at least one member of the group consisting of di-(n-pentyl)-amine, di-(n-hexyl)-amine and water-soluble salts of said amines to an aqueous solution containing at least one member of the group consisting diphenylphosphine-phenyl-m-sulfonic acid, phenylphosphine-di-(m-phenylsulfonic acid), triphenylphosphine-tri(m-sulfonic acid) and salts thereof to adjust the pH value to .ltoreq.7, recovering the precipitate, washing the precipitate and dissolving the same in an aqueous basic solution.

REFERENCES:
patent: 4357280 (1982-11-01), Chylewski
patent: 4483801 (1984-11-01), Sabot
patent: 4483802 (1984-11-01), Gartner

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