=

--------------------------------------------------
Note added at 44 mins (2011-02-17 18:32:38 GMT)
--------------------------------------------------

http://www.eugris.info/newsdownloads/GreenRemediation/pdf/D0...
Abstract
A method for extracting oil from oil-contaminated soil containing 2 to 5 wt. % oil, comprising contacting the oil-contaminated soil with a solvent in the presence of sonic energy in the frequency range of 0.5 to 2.0 kHz. Specifically, a solvent is first mixed with the oil-contaminated soil and the mixture is then formed into a slurry of oil-contaminated soil particles suspended in the solvent. Thereafter the oil-contaminated soil slurry is passed through a shaker screen to remove soil particles greater than 1/4 inch. The oil-contaminated soil slurry containing the smaller soil particles is then fed into the top of a vertically disposed, substantially rectangular shaped, hollow acoustic chamber of uniform cross-section. Fresh solvent is injected into the bottom of the acoustic chamber that flows upwardly through the acoustic chamber. The fresh solvent is injected at a rate low enough whereby the oil-contaminated soil particles fall by gravity through the upwardly flowing solvent. The oil-contaminated soil particles and solvent in the acoustic chamber are subjected to acoustic energy in the frequency range of 0.5 to 2.0 kHz displaces the oil from the oil-contaminated soil particles that is dissolved by the upwardly flowing solvent without cavitation of the solvent. The substantially oil-free soil particles containing only 0.2 to 0.4 wt. % oil are recovered from the bottom of the acoustic chamber and spread over the land for land farming. The present method may also be used for extracting oil from oily sludge or oil-based drill cuttings
http://www.patentstorm.us/patents/5690811.html

What is it? Oil contaminated soil is generally the result of leaking underground storage tanks.

- General Info

Beneficial Uses Aggregate for hot and cold mix asphalt processes
Concrete aggregate
Raw material replacement
- Beneficial Uses
- Case Studies

Properties Oil contaminants are from the same process and have similar properties to asphalt
Petroleum products alter soil properties - especially decreasing internal friction between soil particles
- Engineering Properties
- Environmental Properties

Producers Oily soil is collected when leaking underground storage tanks are removed or repaired.
- Current

http://useit.umaine.edu/factsheet/fsos.htm

--------------------------------------------------
Note added at 1 hr (2011-02-17 18:52:40 GMT)
--------------------------------------------------

HOMESEARCH PATENTSCHEMICAL SEARCHDATA SERVICESHELP Treatment of soil contaminated with oil or oil residues United States Patent 6153017 Ads by Google
Land Contamination?
Contact The Remediation Experts Range Of In / Ex-situ Technologies
www.ecologia-environmental.comA method for removal of hydrocarbon materials from solid particulate soil contaminated with the hydrocarbon materials. The method comprises forming an aqueous slurry of a mixture of a hydrophobic adsorbent selected from foamed synthetic materials or natural materials which entrap gas, with the soil in the presence of water. The adsorbent has a density less than water. The slurry is mixed for a period of time, and a gravity separation of the adsorbent from the aqueous admixture thus obtained is effected. Ads by Google
http://www.freepatentsonline.com/6153017.html