Process for the preparation of sulfonated aryl phosphine
AssigneeRuhrchemie Aktiengesekkschaft
InventorsRoderich Gartner, Boy Cornils, Helmut Springer, Peter Lappe
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Abstract
A process for the preparation of mono, di or trisulfonated aryl phosphines whereby triaryl phosphine is sulfonated with oleum at 0.degree. to 40.degree. C. After dilution of the reaction product with water, the sulfonated triaryl phosphine is extracted with an amine dissolved in an organic solvent; both the amine and organic solvent being insoluble in water. From the organic phase the sulfonated phosphine is transferred to the aqueous phase by treatment with an aqueous solution of a base.
Claims11
A process for the preparation of at least one of mono-, di-, and trisulfonated triaryl phosphine comprising sulfonating triaryl phosphines with oleum at 0.degree. to 40.degree. C. to form a sulfonation mixture, diluting said mixture with water to form an aqueous solution, extracting said aqueous solution with an organic solution of a water-insoluble amine in a water-insoluble organic solvent in an amount sufficient to deliver 0.5 to 1.5 mol of said amine per sulfonic acid group equivalent, separating said organic solution, mixing said organic solution with an aqueous solution of a base to form a basic aqueous phase, separating said basic aqueous phase and recovering at least one of said mono-, di-, and trisulfonated triaryl phosphine therefrom.
Dependencies are inferred from the claim text.