Improved water purification pack

Details Improved water purification pack Improved water purification pack

C - Chemistry, Metallurgy

02

F

C02F 9/04 (2006.01) B01D 61/14 (2006.01) B01D 61/18 (2006.01) B01D 67/00 (2006.01) B01F 1/00 (2006.01) A61M 1/28 (2006.01) C02F 1/28 (2006.01) C02F 1/42 (2006.01)

Patent

CA 2362774

An apparatus and methods are disclosed for purifying fluid, such as potable water, to quality levels suitable for medical application, particularly to applications involving injection of the fluid into a human body. The apparatus comprises a portable purification pack (12) constructed for a single use. The pack (12) houses depth filtration (26), activated carbon (28), mixed bed ion exchange resins (32) and terminal filtration (36) stages in series. The terminal filter (36) comprises a fine (microfiltration or ultrafiltration), permeable membrane, treated with an endotoxin-binding chemistry. In contrast with semi-permeable osmotic membranes, the permeable membrane produces high flow rates at relatively low pressures, while still safely purifying fluid to injection quality.

L'invention concerne un appareil et des procédés destinés à l'épuration de fluides, par exemple, d'eau potable, à des degrés de qualité convenant pour des applications médicales, en particulier pour des applications impliquant des injections de fluide dans le corps humain. L'appareil comprend un pack d'épuration portatif (12) conçu pour un usage unique. Le pack (12) est prévu pour loger successivement les étages suivants : entrée du liquide à filtrer (26), charbon actif (28), lit mixte de résines échangeuses d'ions (32) et filtration finale (36). Le filtre final (36) comprend une membrane perméable fine (microfiltration ou ultrafiltration) traitée par chimie de fixation d'endotoxine. Contrairement aux membranes osmotiques semi-perméables, la membrane perméable précitée permet d'obtenir des débits élevés à des pressions relativement faibles, tout en garantissant une épuration fournissant un fluide de qualité pour injection.

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