Removal of chlorine-based contaminants from materials contaminat

Details Removal of chlorine-based contaminants from materials contaminat Removal of chlorine-based contaminants from materials contaminat

1985-08-13

1986-09-09

Fisher, Richard V.

Cleaning and liquid contact with solids

Processes

Work handled in bulk or groups

134 26, 208262, 208390, 210639, 210644, B08B 304, B01D 1100, B01D 1300

Patent

active

046107290

ABSTRACT:
The separation of a chlorine-based contaminant from a surface of a substrate covered with same is effected by dissolving the contaminant in a first solvent to form a solution thereof and admixing a further solution consisting of a membrane-like material forming component derived from mineral crude oil, bitumen or amphipathic lipids in a second solvent selected from the group consisting of halogenated hydrocarbons and p-xylene, the second solvent being miscible with the first solvent and capable of forming in the presence of water and the membrane-like material forming component an interfacial membrane-like material which has a water side and is impermeable to the contaminant. Water is then intimately contacted with the surface of the substrate so as to cause the membrane-like material to form at the surface of the substrate with the water side oriented toward the surface while the water wets the surface and spreads thereover, the membrane-like material incorporating during its formation the contaminant and mixture of solvents adjacent the surface, and the water displacing the membrane-like material away from the surface as it is being formed thereacross to thereby separate the contaminant and mixture of solvents from the surface and cover the surface with a layer of water. The invention is particularly useful for the decontamination of dioxin contaminated soils.

REFERENCES:
patent: 3553099 (1971-01-01), Savage et al.
patent: 4055480 (1977-10-01), Smith et al.
patent: 4057486 (1977-11-01), Meadus et al.
patent: 4217202 (1980-08-01), Paraskos et al.
patent: 4229281 (1980-10-01), Alquist et al.
patent: 4342639 (1982-08-01), Gagon
patent: 4392892 (1983-07-01), Wagner et al.
patent: 4424081 (1984-01-01), Giguere
patent: 4574013 (1986-03-01), Peterson

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