Method of scale inhibition

C - Chemistry – Metallurgy – 02 – F

Patent

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C02F 5/14 (2006.01) C02F 5/12 (2006.01) C09K 8/528 (2006.01)

Patent

CA 2659813

A method is disclosed to inhibit scale formation in aqueous systems whereby a threshold amount of a scale inhibiting agent, represented by an aminoacid alkylphosphonic acid, is added to the aqueous system. The aminoacid moiety can be represented by .alpha.-species or by species having, at least, two or more carbon atoms between the carboxylic moiety and the amine group. These aminoacid based inhibitors exhibit unusually superior performance and system acceptability compared to leading state-of-the-art inhibitors.

L'invention concerne un procédé permet tant d'inhiber la formation de tartre dans des systèmes aqueux. Une quantité seuil d'un agent d'inhibition du tartre, représenté par un acide alkylphosphonique d'acide aminé, est ajoutée au système aqueux. La fraction d'acide aminé peut être représentée par une espèce .alpha. ou par des espèces ayant deux atomes de carbone ou plus entre la fraction d'acide carboxylique et le groupe amine. Ces inhibiteurs à base d'acide aminé présentent une performance et une acceptabilité par le système inhabituellement supérieures par comparaison aux inhibiteurs de l'état de la technique.

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