Patents Assigned to Ruhrchemie Aktiengesekkschaft
  • Process for the preparation of sulfonated aryl phosphine
    Patent number: 4483802
    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.
    Type: Grant
    Filed: September 20, 1983
    Date of Patent: November 20, 1984
    Assignee: Ruhrchemie Aktiengesekkschaft
    Inventors: Roderich Gartner, Boy Cornils, Helmut Springer, Peter Lappe