Phosphonic cotelomers and method of use

Details Phosphonic cotelomers and method of use Phosphonic cotelomers and method of use

1995-06-07

1997-10-28

Nagumo, Mark

Liquid purification or separation

Processes

Preventing, decreasing, or delaying precipitation,...

210700, 210701, 252180, 526240, 526287, 5253282, C02F 514

Patent

active

056814798

ABSTRACT:
Phosphonic coletomers of the formula I: ##STR1## wherein X.sub.5 is hydrogen, an alkali metal atom, an alkaline earth metal atom, or an ammonium or amine residue; and A.sub.2 is a copolymer residue comprising two different residues ##STR2## wherein r is an integer ranging from 2 to 100, and wherein, in the first residue, W.sub.3 is --COOH, and in the second residue, W.sub.3 is --CONHC(CH.sub.3).sub.2 CH.sub.2 SO.sub.3 X.sub.5 wherein X.sub.5 is as hereinbefore defined. The cotelomers inhibit scale and corrosion in aqueous systems.

REFERENCES:
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patent: 4046707 (1977-09-01), Smith et al.
patent: 4374733 (1983-02-01), Godlewski
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patent: 5160630 (1992-11-01), Clubley et al.
patent: 5229030 (1993-07-01), Clubley et al.
patent: 5512183 (1996-04-01), Boyette et al.
British Search Report Oct. 2, 1991.
Russian Technical Journal Izv. Akad. Nauk. USSR 1989, 1390.
Partial translation of above Russian article.

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