Ruhrchemie Aktiengesellschaft

Ruhrchemie Aktiengesekkschaft

Roderich Gartner

Boy Cornils

Peter Lappe

Helmut Springer

Hanswilhelm Bach

Wilhelm Gick

Ludger Bexten

Dieter Kupies

To recover a hydroformylation catalyst system containing rhodium and phosphine, the aqueous solution containing the catalyst system is mixed with acid and then extracted with an amine which is dissolved in an organic solvent. The organic phase is separated and treated with the aqueous solution of an inorganic base, thereby recovering the catalyst in essentially pure form as an aqueous solution.

Process for the recovery of water-soluble hydroformylation catalysts

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.

Process for the preparation of sulfonated aryl phosphine

A polyol composition comprising a solid polyol which is crystalline under normal conditions and, as an anti-caking agent therefor, a tertiary amine containing at least two identical organic substituents, each having two to twenty carbon atoms. A method of preventing caking of polyols is disclosed wherein to such polyols there is added at least one of such tertiary amines, preferably in a concentration of 0.05 to 0.25 percent by weight based on the weight of the polyol.

Method for preventing caking of polyols

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Dinslaken, Germany

Roderich Gartner