N-Phosphono methylene amino alkane phosphonic acid compounds, pr

Details N-Phosphono methylene amino alkane phosphonic acid compounds, pr N-Phosphono methylene amino alkane phosphonic acid compounds, pr

1977-05-23

1978-07-04

Evans, Joseph E.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

71 27, 162158, 210 58, 252 857, 252 88, 252180, C07F 938, C02B 506, C14C 300, D06M 114

Patent

active

040988147

ABSTRACT:
Valuable and highly water soluble N-phosphono methylene mono- and di-amino alkane mono- and polyphosphonic acids which have not only an >N--CH.sub.2 --PO.sub.3 H.sub.2 group but also a C--PO.sub.3 H.sub.2 group in their molecule are produced by reacting amino alkane mono- or diphosphonic acids with formaldehyde and phosphorous acid or alkane nitriles with phosphorous acid, formaldehyde, and concentrated hydrochloric acid. The resulting phosphonic acid compounds are valuable sequestering agents forming complex compounds with bi- and polyvalent metal ions. They are useful for water softening even in substoichiometric amounts, in textile treatment baths, in the paper manufacture, in tanning baths, for the manufacture of liquid fertilizers, and for other purposes.

REFERENCES:
patent: 2599807 (1952-06-01), Bersworth
patent: 3288846 (1966-11-01), Irani et al.
patent: 3705191 (1972-12-01), Kerst

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