Invention Grant
- Patent Title: Process for the preparation of sulfonated arylphosphines
- Patent Title (中): 制备磺化芳基膦的方法
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Application No.: US264720Application Date: 1994-06-23
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Publication No.: US5451698APublication Date: 1995-09-19
- Inventor: Helmut Bahrmann , Peter Lappe , Wolfgang A. Herrmann , Rainer Manetsberger , Guido Albanese , Klaus Bergrath
- Applicant: Helmut Bahrmann , Peter Lappe , Wolfgang A. Herrmann , Rainer Manetsberger , Guido Albanese , Klaus Bergrath
- Applicant Address: DEX
- Assignee: Hoechst Aktiengesellschaft
- Current Assignee: Hoechst Aktiengesellschaft
- Current Assignee Address: DEX
- Priority: DEX4321512.2 19930629; DEX4344066.5 19931223
- Main IPC: B01J21/02
- IPC: B01J21/02 ; C07B61/00 ; C07F9/50 ; C07C309/32
Abstract:
The sulfonation of arylphosphines, i.e. mono-, di-, oligo- and polyphosphines, which contain at least one aromatic radical capable of being sulfonated, is carried out in the presence of a Lewis acid at 0.degree. to 80.degree. C. The process avoids side-reactions, in particular the formation of phosphine oxides. In treating the sulfonation mixture, the Lewis acid can be removed together with the sulfuric acid.
Public/Granted literature
- US4938103A Friction element engagement pressure and timing control arrangement for automatic transmission Public/Granted day:1990-07-03
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