Broad spectrum filter system for filtering contaminants from...

B - Operations – Transporting – 01 – J

Patent

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B01J 20/20 (2006.01) B01D 53/02 (2006.01) B01J 20/32 (2006.01)

Patent

CA 2356292

Filter medium includes at least two kinds of filter media particles. A first plurality of filter media particles includes an extended surface area substrate comprising at least one transition metal impregnant. A second plurality of filter media particles includes an extended surface area substrate comprising a tertiary amine impregnant. In preferred embodiments, at least one and preferably both of the kinds of filter media particles is/are substantially free of chromium, and more preferably contain no detectable chromium. The filtering medium has very broad filtering capabilities. The filtering medium successfully achieves performance levels mandated both by applicable industrial filter approval specifications and by international military filter performance specifications.

L'invention se rapporte à un milieu filtrant comportant au moins deux sortes de particules pour milieux filtrants. Une première pluralité de particules pour milieux filtrants inclut un substrat à aire de surface étendue comportant au moins un produit d'imprégnation à base d'un métal de transition. Une seconde pluralité de particules pour milieux filtrants inclut un substrat à aire de surface étendue comportant un produit d'imprégnation à base d'une amine tertiaire. Dans les réalisations préférées de l'invention, l'un au moins de ces types de particules pour milieux filtrants, ou de préférence les deux, ne contient/contiennent sensiblement pas de chrome, et idéalement ne contient/contiennent pas de chrome détectable. Ce milieu filtrant possède des capacités de filtrage très étendues. Il est susceptible de répondre avantageusement aux exigences de niveaux de performances prescrites à la fois par les spécifications d'agrément applicables relatives aux filtres industriels et par les spécifications internationales de performance des filtres militaires.

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