Oil-sorbing article and methods for making and using same

B - Operations – Transporting – 01 – J

Patent

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Details

B01J 20/28 (2006.01) C02F 1/40 (2006.01) C09K 3/32 (2006.01)

Patent

CA 2248156

An absorbent article for use in cleaning oil spills comprises a first exposed outer layer of hydrophobic, liquid-permeable, fibrous polymeric nonwoven web and an absorbent body, adjacent the outer layer, comprising oil absorbent, cellulose-based material. Desirably, the article further comprises a second exposed outer layer of hydrophobic polymeric material with the absorbent body disposed between the first and second exposed outer layers. The absorbent article is placed on a layer of oil resting on the surface of a body of water for oil spill clean up. The absorbent article selectively absorbs oil over water because the outer hydrophobic layer repels water but attracts oil and transfers the oil to the oil absorbent body encased between the exposed outer layers. This invention results in considerable savings in cost and in non- renewable resources because the bulk of the product is a cellulose-based material, which is renewable, while only a small portion is polymeric nonwoven, which is non-renewable.

Article absorbant utilisé pour le nettoyage des nappes d'hydrocarbures, qui comprend une première couche externe exposée de non-tissé polymère fibreux, hydrophobe et perméable aux liquides, et un corps absorbant adjacent à la couche externe exposée et contenant un matériau à base de cellulose absorbant les hydrocarbures. De préférence, l'article aura une deuxième couche externe exposée, faite en non-tissé polymère hydrophobe, le corps absorbant étant situé entre la première et la deuxième couche externe exposée. L'article absorbant est placé sur une couche d'hydrocarbures qui se trouve à la surface de l'eau afin de nettoyer la nappe d'hydrocarbures. L'article absorbant absorbe sélectivement les hydrocarbures à la surface de l'eau sans absorber cette dernière car la couche externe hydrophobe repousse l'eau mais attire les hydrocarbures, qu'elle dirige vers le corps absorbant les hydrocarbures placé entre les deux couches externes exposées. Cette invention permet de réaliser des économies non négligeables en matière de coûts et de ressources non renouvelables, car une grande partie du produit est faite avec un matériau à base de cellulose, qui est renouvelable, tandis que seule une petite partie du produit est faite en non-tissé polymère, qui n'est pas renouvelable.

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