Derivative of phosphonic acid and process for the preparation th

Details Derivative of phosphonic acid and process for the preparation th Derivative of phosphonic acid and process for the preparation th

1997-10-24

1998-12-08

Rotman, Alan L.

Organic compounds -- part of the class 532-570 series

Organic compounds

Phosphorus acids or salts thereof

558180, C07F 938, C07F 940

Patent

active

058471995

ABSTRACT:
To provide 2,5-dicarboxyphenyl phosphonic acid and a process for the preparation thereof, comprising the steps of: forming a reaction liquid phase by supplying a 2,5-dialkylphenyl phosphonic acid, a solvent, a cobalt salt, a manganese salt and/or a cerium salt, and bromine or a bromine compound into a reaction zone; and supplying oxygen into the reaction liquid phase by bringing an oxygen-containing gas into contact with the reaction liquid phase by supplying an oxygen-containing gas into the above-mentioned reaction zone.

REFERENCES:
patent: 2834804 (1958-05-01), Lecher et al.
patent: 5498784 (1996-03-01), Arnold et al.

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