Process for preparing N-phosphonomethylamino carboxylic acids

Details Process for preparing N-phosphonomethylamino carboxylic acids Process for preparing N-phosphonomethylamino carboxylic acids

1996-07-01

1997-02-11

Barts, Samuel

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

Organic compounds

Phosphorus acids or salts thereof

562 17, C07F 938

Patent

active

056022760

ABSTRACT:
A process for preparing N-hydroxyalkylaminomethylphosphonic acid or salts thereof which comprises contacting an alkanolamine, formaldehyde and a dialkyl phosphite in the presence of an alcohol under suitable reaction conditions to produce a reaction mixture, and hydrolyzing the reaction mixture under acidic or basic conditions. In one embodiment, the N-hydroxyalkylaminomethylphosphonic acid or salts thereof is catalytically oxidized to produce an N-phosphonomethylaminocarboxylic acid or salts thereof.

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