Composition and improved ph driven method for wastewater...

C - Chemistry – Metallurgy – 11 – D

Patent

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C11D 1/94 (2006.01) B01D 17/04 (2006.01) B01D 17/05 (2006.01) B01D 21/01 (2006.01) B01F 17/18 (2006.01) C02F 1/54 (2006.01) C11D 1/88 (2006.01) C11D 3/02 (2006.01) C11D 3/08 (2006.01) C11D 3/10 (2006.01) C11D 3/33 (2006.01) C11D 7/06 (2006.01) C11D 1/72 (2006.01) C11D 1/90 (2006.01)

Patent

CA 2180241

Improved separation of emulsified hydrophobic organic soils can be obtained from aqueous effluents using an amphoteric carboxylate surfactant material in combination with cationic destabilizer or flocculent materials. Such a treatment in combination with an acidic pH adjustment causes the rapid separation of hydrophobic organic soils from the aqueous stream. The treated aqueous stream is environmentally compatible. Improved laundry detergents comprising an organic amphoteric carboxylate surfactant and selected nonionic surfactants provide both cleaning for fiber and fabric containing items soiled with substantial quantities of hydrophobic soil. The pH of an effluent generated in such cleaning processes can be adjusted to an acid pH and treated with a cationic material causing a break that permits rapid and substantially complete separation of the hydrophobic organic soils from the effluent. Residual concentrations of organic soil in effluent water can be less than 250 ppm and can be as low as 100 ppm.

L'invention se rapporte à la séparation améliorée de terres organiques, hydrophobes, émulsifiées et d'effluents aqueux à l'aide d'un tensioactif carboxylate, amphotère, en combinaison avec des matières floculeuses ou déstabilisatrices cationiques. Ce traitement, combiné à un ajustement du pH acide, suscite la séparation rapide des terres organiques, hydrophobes du courant aqueux. Le courant aqueux, traité, est compatible à l'environnement. L'invention se rapporte également à des détergents améliorés pour lessive comprenant un tensioactif carboxylate, amphotère, organique et des tensioactifs non ioniques, sélectionnés, qui assurent le nettoyage d'articles en tissus et à base de fibres souillés par d'importantes quantités de terre organique. Le pH d'un effluent obtenu dans ces procédés de nettoyage peut être ajusté à un pH acide et traité avec une matière cationique, ce qui provoque une rupture et permet une séparation rapide et pratiquement totale des terres organiques hydrophobes et de l'effluent. Les concentrations résiduelles de terre organique dans l'eau de l'effluent peuvent être inférieures à 250 ppm et de préférence sensiblement inférieures à 100 ppm.

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