Azetidinium-functional polysaccharides and uses thereof

C - Chemistry – Metallurgy – 08 – L

Patent

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C08L 79/02 (2006.01) B03D 1/016 (2006.01) C08L 3/02 (2006.01) C08L 5/00 (2006.01) C08L 5/04 (2006.01) C22B 3/00 (2006.01)

Patent

CA 2702923

The present invention relates to polysaccharides that have been modified by providing azetindium functionality thereto. Such functionality can be provided by crosslinking a polysaccharide with a resin having azetidinium functional groups. In one or more aspects, the polysaccharide can comprise one or more of starch, guar gum, alginate or derivatives thereof. Polysaccharides having azetidinium functionality according to the present invention are suitable for multiple uses. Such uses include, but are not limited to, removal of one or more solid materials from a liquid, beneficiation of an ore; removal of metallic ions from a liquid; providing oil from bitumen; and removal of mercury from synthetic gypsum. Other uses of the functionalize polysaccharides of the present invention include hydroseeding, dust control and erosion control.

Cette invention concerne des polysaccharides qui ont été modifiés par introduction d'une fonctionnalité azétidinium. Cette fonctionnalité peut être introduite par réticulation d'un polysaccharide avec une résine contenant des groupes fonctionnels azétidinium. Selon un ou plusieurs aspects, le polysaccharide peut comprendre un ou plusieurs des éléments suivant : amidon, gomme de guar, alginate ou leurs dérivés. Les polysaccharides à fonction azétidinium selon la présente invention ont de multiples utilisations comprenant, mais sans limitations, l'élimination d'un ou de plusieurs matériaux solides contenus dans un liquide, la valorisation d'un minerai; l'élimination des ions métalliques contenus dans un liquide; l'obtention d'huile à partir de bitume; et l'élimination du mercure contenu dans un gypse synthétique. D'autres utilisations des polysaccharides fonctionnalisés de la présente invention sont l'ensemencement hydraulique, le dépoussiérage et la lutte contre l'érosion.

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