Process for preparing sulfonated arylphosphines

Details Process for preparing sulfonated arylphosphines Process for preparing sulfonated arylphosphines

2005-03-08

2005-03-08

Richter, Johann R. (Department: 1621)

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

Organic compounds

Sulfonic acids or salts thereof

C562S030000, C568S013000

Reexamination Certificate

active

06864387

ABSTRACT:
A process for preparing solutions of sulfonated arylphosphines comprising reacting arylphosphines with oleum, diluting the sulfonation mixture with water, extracting the diluted sulfonation mixture with a solution of a water-insoluble organic solvent, reacting the organic phase with a solution of an inorganic base in water, adjusting the resulting aqueous solutin of sulfonated arylphosphines to a pH of up to 3 by addition of an acid, and passing an inert gas stream through the aqueous solution comprising sulfonated arylphosphines until sulfur is no longer liberated from the aqueous solution of sulfonated arylphosphines.

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CA:69:86252 abs of Industrial and Engineering Chemistry Product Research and Devel. by Tucci, Raymond 7(3) pp 227-8, 1968.*
CA:108::211031 abs of Journal of Molecular Catalysis by Larpent et al 44(2) pp 191-5 1988.

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