C - Chemistry – Metallurgy – 10 – G
Patent
C - Chemistry, Metallurgy
10
G
196/26, 71/51, 1
C10G 1/04 (2006.01) B01J 13/00 (2006.01) B08B 3/10 (2006.01) C01G 1/04 (2006.01) C23G 5/02 (2006.01)
Patent
CA 1266993
ABSTRACT The separation of oil or bitumen from a surface of a substrate covered with same is effected by dissolving the oil or bitumen in a first solvent to form a solution thereof, separating the solution from the substrate to provi- de a solution wet substrate and adding to the solution wet substrate 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 imperme- able to the oil or bitumen. Water is then intimately con- tacted with the surface of the substrate so as to cause the membrane-like material to form at the surface of the sub- strate with the waker side oriented toward the surface while the water wets the surface and spreads thereover, the mem- brane-like material incorporating during its formation the oil or bitumen 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 separte the oil or bitumen and mixture of solvents from the surface and cover the surface with a layer of water. The membrane-like material acts as a barrier to maintain the oil or bitumen in solution with the mixture of solvents and to prevent passage of same into the water layer.
582352
Linnola Ltd.
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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