B - Operations – Transporting – 09 – B
Patent
B - Operations, Transporting
09
B
B09B 3/00 (2006.01) A01B 79/00 (2006.01) C02F 11/06 (2006.01)
Patent
CA 2079508
A method and apparatus are provided for the treatment of hydrocarbon-contaminated soil by chemical hydrolysis and/or oxidation of the hydrocarbons in the hydrocarbon-contaminated soil. The method includes conditioning lime with a particularly-specified fatty-acid activator. The conditioned lime is blended with physically-preconditioned, moist, hydrocarbon-contaminated soil, the degree of blending being at least near microscopic level. A charge of the blended lime/soil is conveyed to an enclosed reaction vessel, where hydration of the lime is carried out. The heat of the hydration reaction is retained within the vessel, so that hydrolysis of the fatty acid conditioner and/or hydrocarbon contaminants in the soil is effected. Air or oxygen-enriched air is substantially-simultaneously introduced into the reaction vessel together with steam and/or water as required by the chemical reactions, thereby to effect a flameless, intermediate-temperature oxidation of the hydrocarbons and their hydrolysed degradation products. Decontaminated soil product is discharged from the reaction vessel by passing the decontaminated soil product, in dry, dusty, hydrophobic form, through a treating zone where it is sprayed with a surfactant. The surfactant-treated solid is passed to a blender where it is mixed with sufficient water to provide a substantially dust-free decontaminated soil product.
Borden Ladner Gervais Llp
The Ani Corporation Limited
LandOfFree
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