B - Operations – Transporting – 09 – C
Patent
B - Operations, Transporting
09
C
B09C 1/08 (2006.01) B09B 3/00 (2006.01) A62D 3/00 (2006.01)
Patent
CA 2145139
A method is 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- recited liquid mixture of fatty acids hydrophobizing agent. Such lime, either before the conditioning treatment, or after such treatment, is preheated to a temperature of 50°C to 80°C to provide conditioned lime. Such conditioned lime is intimately blended with physically-preconditioned, moist, hydrocarbon-contaminated soil, under conditions of high shear, the degree of blending being at least near microscopic level. A charge of such blended conditioned lime/soil mixture is conveyed to an enclosed reaction vessel and hydration of the lime in the blended conditioned lime/soil charge is carried out by the addition of water and/or steam and, substantially simultaneously, air and/or oxygen-enriched air, thereby to effect a flameless, inter- mediate-temperature oxidation of the hydrocarbons or of their hydrolysed degradation products. The heat of the hydration reaction is retained within the vessel. The oxidized products are passed through the blended condi- tioned lime/soil charge at a progressively increasing tem- perature. Decontaminated soil product is discharged from the reaction vessel and may be cooled to a temperature below 100°C, and then passed through a zone where it may be sprayed with a surfactant. The decontaminated soil product is passed to a blender where it is mixed with sufficient water to provide a substantially dust-free product.
Borden Ladner Gervais Llp
The Ani Corporation Limited
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