C - Chemistry – Metallurgy – 02 – F
Patent
C - Chemistry, Metallurgy
02
F
C02F 1/76 (2006.01) A01N 59/00 (2006.01) C02F 1/50 (2006.01)
Patent
CA 2452063
The present invention is a method for controlling (e.g. inhibiting) the growth of microorganisms or killing microorganisms in an aqueous solution, such as that found in a water treatment facility or papermaking facility. The method includes adding an effective amount of (a) a free halogen-generating biocide, (b) a halogen stabilizer, and (c) a quaternary ammonium compound, a biocidal amine or salt thereof, or mixture thereof to the aqueous solution. The aqueous solution may be water in a recreational facility, an industrial cooling system, a water treatment facility or a water slurry, such as a circulating water slurry, in a papermaking facility. The mixture of the present invention is useful as a slimicide. The quaternary ammonium biocide and/or biocidal amine increase the efficacy of the free halogen-generating biocidal system.
La présente invention concerne un procédé permettant de lutter contre, voire d'empêcher, la croissance de micro-organismes ou de tuer des micro-organismes dans une solution aqueuse, comme c'est le cas dans des installations de traitement des eaux ou de papeterie. Le procédé implique d'ajouter à la composition aqueuse une quantité suffisante (a) d'un biocide générant des halogènes libres, (b) d'un stabilisateur d'halogènes, et (c) d'un composé d'ammonium quaternaire, l'un de leurs amines ou sels biocides ou l'un de leurs mélanges. La solution aqueuse peut être l'eau d'uns installation de loisirs, un système de refroidissement industriel, une installation de traitement des eaux, ou une eau de dilution circulante de papeterie. Le mélange de la présente invention convient comme fongicide. Le biocide à l'ammonium quaternaire et/ou l'amine biocide augmente l'efficacité du système biocide générant les halogènes libres.
Burns Thomas Warren
Hill Christopher
Sinden Richard Ashley
Sweeny Philip Gerdon
Lonza Inc.
Mccarthy Tetrault Llp
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