Process for preparing sulfonated arylphosphines

Number of patents in Portfolio can not be more than 2000

United States of America Patent

APP PUB NO 20060276669A1
SERIAL NO

11480178

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Abstract

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An aqueous catalyst solution comprising rhodium and an aqueous solution comprising sulfonated arylphosphines by reacting arylphosphines with oleum to form a sulfonation mixture, diluting the sulfonation mixture with water, extracting the diluted sulfonation mixture with a solution of a water-insoluble amine in a water-insoluble organic solvent, reacting the resulting water-immiscible organic phase with a solution of an inorganic base in water, adjusting the resulting aqueous solution of sulfonated arylphosphines of 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 dioxide is no longer liberated from the aqueous solution of sulfonated arylphosphines.

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Patent Owner(s)

Patent OwnerAddress
OXEA GMBH46147 OBERHAUSEN

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Bahrmann, Helmut Hamminkeln, DE 79 502
Bergrath, Klaus Oberhausen, DE 9 49
Bohnen, Hans Moers, DE 24 295
Eckl, Robert Munchen, DE 14 34
Fenske, Wilfried Hamminkeln, DE 10 85
Fischer, Richard Oberhausen, DE 37 237
Frohning, Carl Wesel, DE 1 0
Greb, Wolfgang Dinslaken, DE 35 162
Herwig, Jurgen Hunxe, DE 12 91
Rampf, Florian Burghausen, DE 15 57
Riedel, Michael Bay City, TX 72 750
Schalapski, Kurt Oberhausen, DE 20 48
Wiebus, Ernst Oberhausen, DE 36 235
Zgorzel-Ski, Wolfgang Oberhausen, DE 4 10

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