Process for elimination N-nitrosamines from N-nitrosamine-containing compositions
AssigneeBASF SE
InventorsPauls Davis, Donald C. Mente
Life of this patent
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Abstract
A process for eliminating N-nitrosamines, particularly N,N-dialkyl-N-nitrosamines and N-alkyl-N-aryl-N-nitrosamines from N-nitrosamine containing compositions through the addition of organic carboxylic acid halides. The process eliminates N-nitroso compounds without rearrangement to C-nitroso compounds.
Claims25
A process for the elimination of N-nitrosamines from N-nitrosamine-containing compositions comprising adding thereto an N-nitrosamine eliminating amount of one or more organic acyl halides having the formula:
- ##STR8## wherein R is a radical of valence n, derived from an aliphatic, cycloaliphatic, arylaliphatic, aromatic, or alkylaromatic hydrocarbon containing from 1 to about 20 carbon atoms, n is an integer from 1 to 3, and X is chlorine or bromine, and wherein said N-nitrosamine is selected from the gruop consisting of (a) N,N-dialkyl-N-nitrosamines, and (b) N-alkyl-N-aryl-N-nitrosamines and N,N-diarylnitrosamines which do not rearrange to form C-nitrosamines.
A process for the elimination of N-nitrosamines from N-nitrosamine-containing dinitroaniline compositions comprising adding an N-nitrosamine eliminating amount of one or more organic acyl halides having the formula:
- ##STR9## wherein R is a radical of valence n, derived from a aliphatic, cycloaliphatic, or arylaliphatic hydrocarbon containing from 1 to about 20 carbon atoms, n is an integer from 1 to 3, and x is chlorine or bromine, and wherein said N-nitrosamine is selected from the group consisting of (a) N,N-dialkyl-N-nitrosamines, and (b) N-alkyl-N-aryl-N-nitrosamines and N,N-diarylnitrosamines which do not rearrange to form C-nitrosamines.
Dependencies are inferred from the claim text.