Demulsification of bitumen emulsions

B - Operations – Transporting – 01 – D

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196/19, 196/206,

B01D 17/04 (2006.01) C08G 18/48 (2006.01) C08G 18/66 (2006.01) C10G 1/00 (2006.01) C10G 1/04 (2006.01) C10G 33/04 (2006.01)

Patent

CA 1152919

ABSTRACT OF THE DISCLOSURE A process for recovering bitumen from oil-in-water (O/W) emulsions is disclosed wherein water soluble demulsi- fiers are used. These demulsifiers are hydrophilic poly- urethanes wherein the ethylene oxide content of the polyl portion of the polyurethane is greater than about 70% by weight. To resolve the bituminous petroleum emulsions, the process is carried out between 25 and 120°C wherein the demulsifier of the invention is contacted with the bituminous emulsion.

377993

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