Oxidation of phosphonomethylamines
AssigneeMonsanto Company
InventorsArnold Hershman, James W. Gambell
Life of this patent
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Abstract
Tertiary phosphonomethylamines are oxidized with oxygen, preferably in contact with activated carbon, to cause cleavage of a phosphonomethyl group and selective production of a secondary amine.
Claims15
A process for production of secondary amines having at least one phosphonomethyl group attached to the amine nitrogen which comprises contacting a tertiary amine having more than one phosphonomethyl group attached to the amine nitrogen and in which other substituents on the nitrogen atom are not more readily removable by oxidation than the phosphonomethyl group, with oxygen at a temperature from ambient to about 250.degree. C and sufficient to oxidize chemically the amine and effect removal of a phosphonomethyl group, and recovering the resulting secondary amine in substantial yield.
A process for production of secondary amines which comprises contacting an N-phosphonomethyl tertiary amine in which other substituents on the nitrogen atom are not more readily removable by oxidation than the phosphonomethyl group, said tertiary amine being further defined as an N,N-dihydrocarbylaminomethylenephosphonic acid, with oxygen employing an activated carbon catalyst at temperatures from ambient to 250.degree. C and sufficient to oxidize chemically the amine and effect removal of a phosphonomethyl group, and recovering the resulting N,N-dihydrocarbylamine in substantial yield.
Dependencies are inferred from the claim text.