Alkylamines as biofilm deactivation agents

C - Chemistry – Metallurgy – 02 – F

Patent

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C02F 1/50 (2006.01) A01N 33/04 (2006.01) A01N 33/12 (2006.01) C02F 1/72 (2006.01)

Patent

CA 2397640

Aqueous industrial, recreational, and drilling systems comprising a biofilm deactivation agent consisting essentially of one or more alkylamines. The biofilm deactivation agent has a "minimum biofilm deactivation concentration" (MBEC) of 200 ppm or less. In a preferred embodiment, the biofilm deactivation agent consists essentially of primary alkylamines having from 12 to 14 carbon atoms, and an MBEC of 50 ppm or less, most preferably 30 ppm or less. A most preferred embodiment comprises a synergistic combination of specific quaternary ammonium salts with a primary alkylamine having from 12 to 14 carbon atoms. The invention also relates to the method of treating an aqueous system with these biofilm deactivation agents, either alone, or in the presence of an oxidizing agent for static control.

L'invention concerne des systèmes de forage, des systèmes aqueux industriels et récréatifs, comprenant un agent de désactivation de film biologique consistant principalement en une ou plusieurs alkylamines. Ledit agent de désactivation de film biologique possède une concentration de désactivation de film biologique minimum (MBEC) d'au plus 200 ppm. Dans un mode de réalisation préféré, l'agent de désactivation de film biologique consiste principalement en alkylamines primaires possédant 12 à 14 atomes de carbone, et une MBEC d'au plus 50 ppm, idéalement d'au plus 30 ppm. Dans un mode de réalisation idéal, ledit agent comprend une combinaison synergique de sels d'ammonium quaternaire spécifiques et d'une alkylamine primaire possédant 12 à 14 atomes de carbone. L'invention porte également sur la méthode de traitement d'un système aqueux à l'aide desdits agents de désactivation de film biologique, seul ou en présence d'un agent oxydant pour la suppression de l'énergie statique.

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