A method to remediate soil using a surfactant of a salt of...

B - Operations – Transporting – 09 – C

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B09C 1/02 (2006.01)

Patent

CA 2386909

A method for remediating soil which is contaminated by one or more hydrophobic organic chemicals, comprising: contacting the contaminated soil with an aqueous composition comprising a surfactant prepared by reacting a sulfonate of formula (I) with an amine wherein R1 is hydrogen or methyl, R2 is hydrogen or an alkyl group containing up to 18 carbon atoms, and each of R3, R4 and R5 is individually hydrogen or an alkyl group containing up to 7 carbon atoms and M is an alkali metal, an alkaline earth metal or -NR10R11R12 wherein R10, R11 and R12 are independently hydrogen or hydrocarbyl groups containing from 1 to 22 carbon atoms and removing said aqueous compositions and organic chemicals associated therewith from the soil.

L'invention concerne un procédé destiné à décontaminer un sol contaminé par un ou plusieurs produits chimiques organiques hydrophobes, consistant d'abord à mettre en contact le sol contaminé avec une composition aqueuse comprenant un agent de surface préparé en faisant réagir un sulfonate de formule générale (I) avec une amine. Dans cette formule, R?1¿ représente de l'hydrogène ou du méthyle, R?2¿ représente de l'hydrogène ou un groupe alkyle renfermant jusqu'à 18 atomes de carbone, et chaque R?3¿, R?4¿ et R?5¿ représentent individuellement de l'hydrogène ou un groupe alkyle renfermant jusqu'à 7 atomes de carbone, et M représente un métal alcalin, un métal terreux alcalin ou -NR?10¿R?11¿R?12¿, dans laquelle R?10¿, R?11¿ et R?12¿ représentent individuellement de l'hydrogène ou des groupes hydrocarbyle renfermant de 1 à 22 atomes de carbone. Ledit procédé consiste ensuite à retirer ladite composition aqueuse et les produits chimiques organiques associés du sol.

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