Chemistry of carbon compounds – Miscellaneous organic carbon compounds – C-metal
Patent
1980-10-29
1982-05-18
Evans, Joseph E.
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
C-metal
210700, C07F 938, C02F 170
Patent
active
043304877
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), Irari et al.
Paley William S.
Redmore Derek
Evans Joseph E.
Glass Hyman F.
Petrolite Corporation
Ring Sidney B.
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