Control of scale formation in aqueous systems

Details Control of scale formation in aqueous systems Control of scale formation in aqueous systems

1994-10-07

1996-02-06

Dodson, Shelley A.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From carboxylic acid or derivative thereof

210698, 210699, 210701, 252180, 252181, 528292, C08G 6302, C02F 510

Patent

active

054896665

ABSTRACT:
A method and compounds for inhibiting the formation of scale is disclosed. The method is particularly effective at inhibiting the formation and deposition of calcium scales in circulating aqueous systems such as cooling water systems. The method comprises introducing into the aqueous system a compound of the general formula: ##STR1## wherein R is hydrogen, alkyl, aryl, substituted alkyl or substituted aryl; R' and R" are each independently hydrogen, C.sub.1-4 alkyl or C.sub.1-4 substituted alkyl; Z is 0, S, NH, or NR, where R is as described above; n is a positive integer greater than 1; f is a positive integer; and M is hydrogen, a water soluble cation (e.g., NH.sub.4.sup.+, alkali metal) or a C.sub.1 -C.sub.3 alkyl group.

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patent: 5062962 (1991-11-01), Brown et al.
patent: 5183590 (1993-02-01), Carter et al.
patent: 5248438 (1993-09-01), Perez

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