N,N-Dimethylene phosphonic acids of alkylene diamines

Details N,N-Dimethylene phosphonic acids of alkylene diamines N,N-Dimethylene phosphonic acids of alkylene diamines

1981-12-28

1983-10-11

Evans, J. E.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07F 938

Patent

active

044091516

ABSTRACT:
This invention relates to a process of preparing N,N'-disubstituted methylene phosphonic acids by reacting .alpha.,.omega.-alkylene diamines with essentially 2 equivalents of formaldehyde and phosphorus acid based on replaced nitrogen-bonded hydrogens.
This invention also relates to compositions formed by the process and to the uses for these compositions such as for inhibiting scale, etc.

REFERENCES:
patent: 2599807 (1952-06-01), Bersworth
patent: 3288846 (1966-11-01), Irani et al.

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