Control of scale formation and corrosion in aqueous systems

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

C - Chemistry, Metallurgy

02

F

C02F 5/10 (2006.01) C02F 5/12 (2006.01) C02F 5/14 (2006.01) C07C 59/305 (2006.01) C07C 229/24 (2006.01) C07C 309/14 (2006.01) C07C 309/17 (2006.01) C07C 323/52 (2006.01) C08G 65/22 (2006.01) C23F 11/08 (2006.01) C23F 11/10 (2006.01) C23F 11/12 (2006.01) D21H 21/02 (2006.01)

Patent

CA 2125223

A method and compounds for inhibiting the formation of scale and controlling corrosion is disclosed. The method is particularly effective at inhibiting the formation and deposition of calcium scales in circulating aqueous systems such as cooling waters systems, as well as inhibiting or preventing corrosion of ferrous-based metals in contact with aqueous systems. The method comprises introducing into the aqueous system a compound of the general formula: Image wherein R is hydrogen, alkyl, aryl, substituted alkyl or substituted aryl; R' and R" are each independently hydrogen, C1-4 alkyl or C1-4 substituted alkyl; Z is NH, NR, O or S where R is as described above; n is a positive integer greater than 1; f is a positive integer; and M is H, a water soluble cation (e.g., NH4+, alkali metal), or a C1-C3 alkyl group.

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