C - Chemistry – Metallurgy – 10 – G
Patent
C - Chemistry, Metallurgy
10
G
196/26, 196/261,
C10G 1/04 (2006.01) B08B 3/10 (2006.01) C01G 1/04 (2006.01) C23G 5/02 (2006.01)
Patent
CA 1261645
Abstract of the Disclosure The separation of a chlorine-based contami- nant 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, bi- tumen or amphipathic lipids in a second solvent selec- ted from the group consisting of halogenated hydrocar- bons 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 con- taminant 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 dio- xin contaminated soils.
496228
Linnola Ltd.
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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