Process for preparing sulfonated arylphosphines

US7102034B2 · kind B2 · utility

Assignee

• CELANESE CHEMICALS EUROPE GMBH · DE

Inventors

• Michael Riedel · Essen, DE
• Ernst Wiebus · Oberhausen, DE
• Carl D. Frohning · Wesel, DE
• Wilfried Fenske · Hamminkeln, DE
• Florian Rampf · Burghausen, DE
• Jurgen Herwig
• Helmut Bahrmann · Hamminkeln, DE
• Klaus Bergrath · Oberhausen, DE
• Wolfgang Zgorzel-Ski · Oberhausen, DE
• Robert Eckl · Munich, DE
• Hans Bohnen · Niedernhausen, DE
• Richard Fischer · Hartland, US
• Kurt Schalapski · Oberhausen, DE
• Wolfgang Greb · Dinslaken, DE

Key dates

• Filing date: Dec 8, 2004
• Grant date: Sep 5, 2006
• Expiry date: Dec 8, 2024

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01J2531/96
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A process for preparing sulfonated arylphosphines by reaction of arylphosphines with oleum, wherein, after reaction of the arylphosphines with oleum, the sulfonation mixture is firstly diluted with water, an inert gas stream is then passed through the diluted sulfonation mixture until SO2 is no longer liberated from the diluted sulfonation mixture and the latter is then worked up further in a customary manner and its use.