Water/surfactant process for recovering hydrocarbons from soil i

Details Water/surfactant process for recovering hydrocarbons from soil i Water/surfactant process for recovering hydrocarbons from soil i

1992-02-13

1993-10-12

Morris, Theodore

Cleaning and liquid contact with solids

Processes

Miscellaneous

134 40, 210691, 210922, 210925, 405128, 25217421, B01D 4300, B08B 308

Patent

active

052521389

ABSTRACT:
A water/surfactant process for removing oil from a soil that has been contaminated by an oil spill. The surfactant is carefully selected from a group consisting of linear alcohols having eight to fifteen carbon atoms and two to eight ethylene oxide units on the carbon atoms. The surfactant concentration is also held to about 0.5 percent, by volume, or less to minimize the formation of an emulsion between the oil and the wash water. The process provides a clean separation of the oil from the soil as well as from the water. The limited surfactant also minimizes dispersion of clay fines from the soil into the water. The water/surfactant is heated for improved removal of oil from the soil.

REFERENCES:
patent: 4380268 (1983-04-01), Martin
patent: 4645608 (1987-02-01), Rayborn

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