Employing methylene phosphonates of oxyalkylated polyalkylene po

Details Employing methylene phosphonates of oxyalkylated polyalkylene po Employing methylene phosphonates of oxyalkylated polyalkylene po

1976-11-24

1978-05-09

Hart, Charles N.

Liquid purification or separation

With alarm, indicator, register, recorder, signal or...

Responsive to fluid flow

252 855D, 252180, C02B 506

Patent

active

040885747

ABSTRACT:
Methylene phosphonates of oxyalkylated polyalkylene polyamines having at least three nitrogen atoms wherein there are nitrogen-bonded methylene phosphonate units of the formula -- CH.sub.2 PO(OM).sub.2. These compounds are used as scale inhibitors, chelating agents, etc.

REFERENCES:
patent: 2599807 (1952-06-01), Bersworth
patent: 2673213 (1954-03-01), Bersworth
patent: 2917528 (1959-12-01), Ramsey et al.
patent: 2964549 (1960-12-01), Ramsey et al.
patent: 3288846 (1966-11-01), Irani et al.
patent: 3617578 (1971-11-01), Stanford
patent: 3799893 (1974-03-01), Quinlan
patent: 3836462 (1974-09-01), Larsen

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